Main Street Capital (MAIN) 10-Q4 Aug 232023 Q2 Quarterly reportFinancial data

Company Profile

Cover

Cover - shares	6 Months Ended
Cover - shares	Jun. 30, 2023	Aug. 03, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
Document Transition Report	false
Securities Act File Number	001-33723
Entity Registrant Name	Main Street Capital Corporation
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	41-2230745
Entity Address, Address Line One	1300 Post Oak Boulevard
Entity Address, Address Line Two	8th Floor
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77056
City Area Code	713
Local Phone Number	350-6000
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	MAIN
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		82,428,020
Entity Central Index Key	0001396440
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023		Dec. 31, 2022
ASSETS
Investments at fair value:	$ 4,210,543		$ 4,102,177	[1]
Cash and cash equivalents	70,886		49,121
Interest and dividend receivable and other assets	117,749		82,731
Receivable for securities sold	13,959		381
Deferred financing costs (net of accumulated amortization of $11,420 and $10,603 as of June 30, 2023 and December 31, 2022, respectively)	7,101		7,475
Total assets	4,420,238		4,241,885
LIABILITIES
Debt	2,021,502		1,999,102
Accounts payable and other liabilities	48,502		52,092
Interest payable	15,355		16,580
Dividend payable	18,729		17,676
Deferred tax liability, net	61,202		47,849
Total liabilities	2,165,290		2,133,299
Commitments and contingencies (Note K)
NET ASSETS
Common stock, $0.01 par value per share (150,000,000 shares authorized; 81,026,676 and 78,463,599 shares issued and outstanding as of June 30, 2023 and December 31, 2022, respectively)	814		784
Additional paid‑in capital	2,132,041		2,030,531
Total undistributed earnings	122,093		77,271
Total net assets	2,254,948		2,108,586
Total liabilities and net assets	$ 4,420,238		$ 4,241,885
NET ASSET VALUE PER SHARE (in dollars per share)	$ 27.69		$ 26.86
Line of Credit \| Revolving Credit Facility
LIABILITIES
Debt	$ 580,000		$ 607,000
Unsecured Notes \| July 2026 Notes
LIABILITIES
Debt	498,399		498,136
Unsecured Notes \| May 2024 Notes
LIABILITIES
Debt	450,454		450,727
Unsecured Notes \| SBIC Debentures
LIABILITIES
Debt	343,943		343,914
Unsecured Notes \| December 2025 Notes
LIABILITIES
Debt	148,706		99,325
Control investments
ASSETS
Investments at fair value:	1,883,699	[2],[3]	1,703,172	[1],[4]
Affiliate investments
ASSETS
Investments at fair value:	563,125	[2],[5]	618,359	[1],[6]
Non‑Control/Non‑Affiliate investments
ASSETS
Investments at fair value:	$ 1,763,719		$ 1,780,646	[1],[7]

[1] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Jun. 30, 2023		Dec. 31, 2022
Investment, cost	$ 3,742,689,000		$ 3,773,752,000	[1]
Deferred financing costs, accumulated amortization	$ 11,420,000		$ 10,603,000
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01
Common stock, shares authorized (in shares)	150,000,000		150,000,000
Common stock, shares outstanding (in shares)	81,026,676		78,463,599
Common stock, shares issued (in shares)	81,026,676		78,463,599
July 2026 Notes \| Unsecured Notes
Debt instrument, par value	$ 500,000,000		$ 500,000,000
May 2024 Notes \| Unsecured Notes
Debt instrument, par value	450,000,000		450,000,000
SBIC Debentures \| Unsecured Notes
Debt instrument, par value	350,000,000		350,000,000
Debt, due within one year	63,800,000
December 2025 Notes \| Unsecured Notes
Debt instrument, par value	150,000,000		100,000,000
Control investments
Investment, cost	1,377,194,000	[2],[3]	1,270,802,000	[1],[4]
Affiliate investments
Investment, cost	539,826,000	[3],[5]	635,536,000	[1],[6]
Non‑Control/Non‑Affiliate investments
Investment, cost	$ 1,825,669,000		$ 1,867,414,000	[1],[7]

[1]Principal is net of repayments. Cost is net of repayments and accumulated unearned income. Negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.[2]Control investments are defined by the 1940 Act as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained[3]Principal is net of repayments. Cost is net of repayments and accumulated unearned income. Negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.[4]Control investments are defined by the 1940 Act as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained.[5]Affiliate investments are defined by the 1940 Act as investments in which between 5% and 25% (inclusive) of the voting securities are owned and the investments are not classified as Control investments.[6]Affiliate investments are defined by the 1940 Act as investments in which between 5% and 25% (inclusive) of the voting securities are owned and the investments are not classified as Control investments.[7]Non-Control/Non-Affiliate investments are defined by the 1940 Act as investments that are neither Control investments nor Affiliate investments.

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
INVESTMENT INCOME:
Interest, fee and dividend income	$ 127,583	$ 85,200	$ 247,838	$ 164,596
EXPENSES:
Interest	(26,754)	(17,295)	(51,752)	(33,982)
Compensation	(12,188)	(8,807)	(23,300)	(16,076)
General and administrative	(4,514)	(4,238)	(8,591)	(7,464)
Share‑based compensation	(4,087)	(3,596)	(8,187)	(6,414)
Expenses allocated to the External Investment Manager	5,688	3,462	10,686	6,279
Total expenses	(41,855)	(30,474)	(81,144)	(57,657)
NET INVESTMENT INCOME	85,728	54,726	166,694	106,939
NET REALIZED GAIN (LOSS):
Total net realized loss	(75,506)	(5,064)	(103,886)	(1,728)
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation (depreciation)	104,941	(24,593)	140,059	(9,841)
INCOME TAXES:
Federal and state income, excise and other taxes	(1,671)	(809)	(3,407)	(2,118)
Deferred taxes	(6,976)	(9,511)	(13,353)	(13,299)
Income tax provision	(8,647)	(10,320)	(16,760)	(15,417)
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS	$ 106,516	$ 14,749	$ 186,107	$ 79,953
NET INVESTMENT INCOME PER SHARE— BASIC (in dollars per share)	$ 1.06	$ 0.75	$ 2.08	$ 1.47
NET INVESTMENT INCOME PER SHARE— DILUTED (in dollars per share)	1.06	0.75	2.08	1.47
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS PER SHARE—BASIC (in dollars per share)	1.32	0.20	2.32	1.10
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS PER SHARE—DILUTED (in dollars per share)	$ 1.32	$ 0.20	$ 2.32	$ 1.10
WEIGHTED AVERAGE SHARES OUTSTANDING—BASIC (in shares)	80,807,861	73,304,619	80,190,630	72,512,793
WEIGHTED AVERAGE SHARES OUTSTANDING—DIILUTED (in shares)	80,807,861	73,304,619	80,190,630	72,512,793
Control investments
INVESTMENT INCOME:
Interest, fee and dividend income	$ 47,979	$ 36,808	$ 96,841	$ 69,385
NET REALIZED GAIN (LOSS):
Total net realized loss	(48,111)	0	(51,077)	0
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation (depreciation)	75,779	4,822	92,940	13,101
Affiliate investments
INVESTMENT INCOME:
Interest, fee and dividend income	20,999	11,893	38,455	25,810
NET REALIZED GAIN (LOSS):
Total net realized loss	9,997	47	(16,267)	739
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation (depreciation)	(11,469)	1,731	21,672	4,772
Non‑Control/Non‑Affiliate investments
INVESTMENT INCOME:
Interest, fee and dividend income	58,605	36,499	112,542	69,401
NET REALIZED GAIN (LOSS):
Total net realized loss	(37,392)	(5,111)	(36,542)	(2,467)
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation (depreciation)	$ 40,631	$ (31,146)	$ 25,447	$ (27,714)

Consolidated Statements of Chan

Consolidated Statements of Changes in Net Assets - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period (in shares)		78,463,599			78,463,599
Balance at beginning of period	$ 2,172,922	$ 2,108,586	$ 1,873,654	$ 1,788,846	$ 2,108,586	$ 1,788,846
Public offering of common stock, net of offering costs	43,204	40,896	25,633	63,522
Share‑based compensation	4,087	4,100	3,596	2,818
Purchase of vested stock for employee payroll tax withholding	(5,546)	(404)	(4,895)
Dividend reinvestment (in shares)					374,173	246,199
Dividend reinvestment	6,880	7,808	5,000	4,813	$ 14,688	$ 9,813
Amortization of directors’ deferred compensation	109	121	130	147
Issuance of restricted stock, net of forfeited shares	0		0
Dividends to stockholders	(73,224)	(67,777)	(52,704)	(51,695)
Net increase resulting from operations	$ 106,516	79,592	14,749	65,203	$ 186,107	79,953
Balance at ending of period (in shares)	81,026,676				81,026,676
Balance at ending of period	$ 2,254,948	$ 2,172,922	$ 1,865,163	$ 1,873,654	$ 2,254,948	$ 1,865,163
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period (in shares)	79,794,089	78,506,816	72,370,407	70,737,021	78,506,816	70,737,021
Balance at beginning of period	$ 797	$ 784	$ 723	$ 707	$ 784	$ 707
Public offering of common stock, net of offering costs (in shares)	1,096,514	1,058,914	662,828	1,502,430
Public offering of common stock, net of offering costs	$ 11	$ 11	$ 7	$ 15
Purchase of vested stock for employee payroll tax withholding (in shares)	(140,569)	(10,489)	(115,071)
Purchase of vested stock for employee payroll tax withholding	$ (1)		$ (1)
Dividend reinvestment (in shares)	174,891	199,282	132,156	114,043
Dividend reinvestment	$ 2	$ 2	$ 1	$ 1
Issuance of restricted stock, net of forfeited shares (in shares)	506,081	39,566	467,238	16,913
Issuance of restricted stock, net of forfeited shares	$ 5		$ 5
Balance at ending of period (in shares)	81,431,006	79,794,089	73,517,558	72,370,407	81,431,006	73,517,558
Balance at ending of period	$ 814	$ 797	$ 735	$ 723	$ 814	$ 735
Additional Paid-In Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	2,083,175	2,030,531	1,807,739	1,736,346	2,030,531	1,736,346
Public offering of common stock, net of offering costs	43,193	40,885	25,626	63,507
Share‑based compensation	4,087	4,100	3,596	2,818
Purchase of vested stock for employee payroll tax withholding	(5,545)	(404)	(4,894)
Dividend reinvestment	6,878	7,806	4,999	4,812
Amortization of directors’ deferred compensation	109	121	130	147
Issuance of restricted stock, net of forfeited shares	(5)		(5)
Dividends to stockholders	149	136	114	109
Balance at ending of period	2,132,041	2,083,175	1,837,305	1,807,739	2,132,041	1,837,305
Total Undistributed (Overdistributed) Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	88,950	77,271	65,192	51,793	77,271	51,793
Dividends to stockholders	(73,373)	(67,913)	(52,818)	(51,804)
Net increase resulting from operations	106,516	79,592	14,749	65,203
Balance at ending of period	$ 122,093	$ 88,950	$ 27,123	$ 65,192	$ 122,093	$ 27,123

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net increase in net assets resulting from operations	$ 106,516	$ 79,592	$ 14,749	$ 65,203	$ 186,107	$ 79,953
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Investments in portfolio companies					(395,305)	(540,429)
Proceeds from sales and repayments of debt investments in portfolio companies					291,557	381,697
Proceeds from sales and return of capital of equity investments in portfolio companies					31,057	30,293
Net unrealized (appreciation) depreciation	(104,941)		24,593		(140,059)	9,841
Net realized loss	75,506		5,064		103,886	1,728
Accretion of unearned income					(9,900)	(7,354)
Payment-in-kind interest					(5,219)	(2,364)
Cumulative dividends					(717)	(1,062)
Share-based compensation expense					8,187	6,414
Amortization of deferred financing costs					1,582	1,372
Deferred tax provision	6,976		9,511		13,353	13,299
Changes in other assets and liabilities:
Interest and dividend receivable and other assets					(34,644)	(3,686)
Interest payable					(1,225)	42
Accounts payable and other liabilities					(3,360)	(10,216)
Deferred fees and other					2,382	1,037
Net cash provided by (used in) operating activities					47,682	(39,435)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from public offering of common stock, net of offering costs					84,100	89,155
Dividends paid					(125,260)	(94,071)
Proceeds from credit facilities					243,000	303,000
Repayments on credit facilities					(270,000)	(243,000)
Debt issuance costs, net					(1,807)	0
Purchases of vested stock for employee payroll tax withholding					(5,950)	(4,895)
Net cash provided by (used in) financing activities					(25,917)	50,189
Net increase in cash and cash equivalents					21,765	10,754
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD		$ 49,121		$ 32,629	49,121	32,629	$ 32,629
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 70,886		$ 43,383		70,886	43,383	$ 49,121
Supplemental cash flow disclosures:
Interest paid					51,333	32,505
Taxes paid					5,909	4,920
Non-cash financing activities:
Value of shares issued pursuant to the DRIP					14,688	9,813
December 2025 Notes
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from debt					50,000	0
SBIC Debentures
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from debt					16,000	0
Repayments of SBIC debentures					$ (16,000)	$ 0

Consolidated Schedule of Invest

Consolidated Schedule of Investments - USD ($) $ in Thousands		Jun. 30, 2023		Dec. 31, 2022		Jun. 30, 2022		Dec. 31, 2021
Schedule of Investments [Line Items]
Cost		$ 3,742,689		$ 3,773,752	[1]	$ 3,742,689	[2]
Fair value		$ 4,210,543		$ 4,102,177	[3]	4,210,543	[4]
Investment owned, percent of net assets		186.70%		194.50%
Analytical Systems Keco Holdings, LLC
Schedule of Investments [Line Items]
Cost		$ 10,385		$ 10,485
Fair value		8,512		8,046
ASC Interests, LLC
Schedule of Investments [Line Items]
Cost		3,643		3,549
Fair value		2,507		2,849
ATS Workholding, LLC
Schedule of Investments [Line Items]
Cost		8,608	[5]	8,484	[6]
Fair value		1,202	[5]	1,639	[6]
Barfly Ventures, LLC
Schedule of Investments [Line Items]
Cost		2,295	[5]	2,295	[6]
Fair value		3,751	[5]	4,031	[6]
Batjer TopCo, LLC
Schedule of Investments [Line Items]
Cost		14,585		15,020
Fair value		16,725		15,020
Bolder Panther Group, LLC
Schedule of Investments [Line Items]
Cost		111,328		112,576
Fair value		128,995		130,614
Brewer Crane Holdings, LLC
Schedule of Investments [Line Items]
Cost		9,996		10,244
Fair value		12,013		13,044
Bridge Capital Solutions Corporation
Schedule of Investments [Line Items]
Cost		12,945		12,945
Fair value		15,263		15,153
California Splendor Holdings LLC
Schedule of Investments [Line Items]
Cost		43,028		42,720
Fair value		55,730		57,489
Centre Technologies Holdings, LLC
Schedule of Investments [Line Items]
Cost		21,088		21,076
Fair value		25,430		23,654
Chamberlin Holding LLC
Schedule of Investments [Line Items]
Cost		29,538		30,148
Fair value		43,177		42,575
Charps, LLC
Schedule of Investments [Line Items]
Cost		6,624		6,606
Fair value		19,494		19,034
Clad-Rex Steel, LLC
Schedule of Investments [Line Items]
Cost		18,509		18,969
Fair value		18,165		20,309
Cody Pools, Inc.
Schedule of Investments [Line Items]
Cost		54,578		50,281
Fair value		111,432		100,443
Colonial Electric Company LLC
Schedule of Investments [Line Items]
Cost		31,189		30,831
Fair value		32,129		32,311
CompareNetworks Topco, LLC
Schedule of Investments [Line Items]
Cost		6,839		7,207
Fair value		21,249		25,071
Cybermedia Technologies, LLC
Schedule of Investments [Line Items]
Cost		43,720
Fair value		43,720
Datacom, LLC
Schedule of Investments [Line Items]
Cost		11,458		11,023
Fair value		10,798		10,682
Digital Products Holdings LLC
Schedule of Investments [Line Items]
Cost		24,234		25,024
Fair value		24,568		25,358
Direct Marketing Solutions, Inc.
Schedule of Investments [Line Items]
Cost		34,681		35,434
Fair value		49,815		49,487
Elgin AcquireCo, LLC
Schedule of Investments [Line Items]
Cost		32,163		34,040
Fair value		32,639		34,040
Gamber-Johnson Holdings, LLC
Schedule of Investments [Line Items]
Cost		77,041		81,377
Fair value		129,838		114,968
Garreco, LLC
Schedule of Investments [Line Items]
Cost		4,472		5,026
Fair value		4,852		5,626
GRT Rubber Technologies LLC
Schedule of Investments [Line Items]
Cost		54,701		54,048
Fair value		86,233		85,603
Gulf Publishing Holdings, LLC
Schedule of Investments [Line Items]
Cost		11,681		11,681
Fair value		6,064		6,064
Harris Preston Fund Investments
Schedule of Investments [Line Items]
Cost		3,612	[7],[8]	4,143	[9],[10]
Fair value		6,661	[7],[8]	7,800	[9],[10]
IG Investor, LLC
Schedule of Investments [Line Items]
Cost		52,390
Fair value		52,390
Jensen Jewelers of Idaho, LLC
Schedule of Investments [Line Items]
Cost		3,259		17,420
Fair value		15,960		3,255
Johnson Downie Opco, LLC
Schedule of Investments [Line Items]
Cost		12,909		13,056
Fair value		16,388		15,539
JorVet Holdings, LLC
Schedule of Investments [Line Items]
Cost		36,199		36,173
Fair value		36,199		36,173
KBK Industries, LLC
Schedule of Investments [Line Items]
Cost		6,034
Fair value		17,660
Kickhaefer Manufacturing Company, LLC
Schedule of Investments [Line Items]
Cost		37,625		37,448
Fair value		34,903		34,286
MetalForming AcquireCo, LLC
Schedule of Investments [Line Items]
Cost		31,263		31,123
Fair value		31,244		31,123
MH Corbin Holding LLC
Schedule of Investments [Line Items]
Cost		16,360		16,556
Fair value		5,503		4,548
MS Private Loan Fund I, LP
Schedule of Investments [Line Items]
Cost		14,250	[7],[8]	14,250	[9],[10]
Fair value		14,635	[7],[8]	14,833	[9],[10]
Mystic Logistics Holdings, LLC
Schedule of Investments [Line Items]
Cost		8,466		8,466
Fair value		32,896		28,576
Nebraska Vet AcquireCo, LLC
Schedule of Investments [Line Items]
Cost		38,598		37,393
Fair value		44,584		38,294
NexRev LLC
Schedule of Investments [Line Items]
Cost		17,938		19,548
Fair value		11,818		9,587
NRP Jones, LLC
Schedule of Investments [Line Items]
Cost		5,797		5,797
Fair value		6,090		6,870
NuStep, LLC
Schedule of Investments [Line Items]
Cost		35,081		35,075
Fair value		36,349		36,003
OMi Topco, LLC
Schedule of Investments [Line Items]
Cost		15,239		16,714
Fair value		43,560		38,560
Orttech Holdings, LLC
Schedule of Investments [Line Items]
Cost		32,658		33,429
Fair value		39,360		35,179
Pearl Meyer Topco LLC
Schedule of Investments [Line Items]
Cost		57,527		41,537
Fair value		88,771		71,941
PPL RVs, Inc.
Schedule of Investments [Line Items]
Cost		22,463		23,787
Fair value		38,610		40,843
Principle Environmental, LLC
Schedule of Investments [Line Items]
Cost		12,726		12,715
Fair value		16,797		18,816
Robbins Bros. Jewelry, Inc.
Schedule of Investments [Line Items]
Cost		45,808		46,439
Fair value		40,434		50,249
Tedder Industries, LLC
Schedule of Investments [Line Items]
Cost		26,638		26,277
Fair value		23,790		24,641
Televerde, LLC
Schedule of Investments [Line Items]
Cost		2,008		2,008
Fair value		7,876		7,202
Trantech Radiator Topco, LLC
Schedule of Investments [Line Items]
Cost		12,555		12,544
Fair value		19,690		15,720
Volusion, LLC
Schedule of Investments [Line Items]
Cost		30,122		33,719
Fair value		12,840		14,914
VVS Holdco LLC
Schedule of Investments [Line Items]
Cost		40,788		41,977
Fair value		40,788		42,080
Ziegler’s NYPD, LLC
Schedule of Investments [Line Items]
Cost		7,634		7,634
Fair value		3,926		4,311
AAC Holdings, Inc.
Schedule of Investments [Line Items]
Cost		16,263		14,738	[11]
Fair value		12,501		11,550	[11]
BBB Tank Services, LLC
Schedule of Investments [Line Items]
Cost		5,762		5,762
Fair value		3,002		2,886
Boccella Precast Products LLC
Schedule of Investments [Line Items]
Cost		2,576		2,576
Fair value		2,670		3,290
Buca C, LLC
Schedule of Investments [Line Items]
Cost		21,750		22,125
Fair value		11,964		12,337
Career Team Holdings, LLC
Schedule of Investments [Line Items]
Cost		25,052		24,581
Fair value		25,052		24,581
Classic H&G Holdings, LLC
Schedule of Investments [Line Items]
Cost		29,523		29,502
Fair value		42,064		48,471
DMA Industries, LLC
Schedule of Investments [Line Items]
Cost		25,800		26,979
Fair value		27,260		28,460
Dos Rios Partners
Schedule of Investments [Line Items]
Cost		8,318	[7],[8]	8,510	[9],[10]
Fair value		11,990	[7],[8]	12,025	[9],[10]
Freeport Financial Funds
Schedule of Investments [Line Items]
Cost		9,274	[7],[8]	9,810	[9],[10]
Fair value		8,940	[7],[8]	9,331	[9],[10]
GFG Group, LLC
Schedule of Investments [Line Items]
Cost		16,181		16,169
Fair value		19,655		18,485
Harris Preston Fund Investments
Schedule of Investments [Line Items]
Cost		6,996	[7],[8]	6,290	[9],[10]
Fair value		9,052	[7],[8]	8,063	[9],[10]
Hawk Ridge Systems, LLC
Schedule of Investments [Line Items]
Cost		48,487		43,868
Fair value		63,988		59,365
Houston Plating and Coatings, LLC
Schedule of Investments [Line Items]
Cost		5,352		5,352
Fair value		6,390		5,400
Infinity X1 Holdings, LLC
Schedule of Investments [Line Items]
Cost		21,832
Fair value		21,832
Integral Energy Services
Schedule of Investments [Line Items]
Cost	[5]	16,916
Fair value	[5]	16,395
Iron-Main Investments, LLC
Schedule of Investments [Line Items]
Cost		49,610		37,931
Fair value		49,610		37,931
ITA Holdings Group, LLC
Schedule of Investments [Line Items]
Cost		8,573
Fair value		8,573
OnAsset Intelligence, Inc.
Schedule of Investments [Line Items]
Cost		12,683		12,683
Fair value		4,187		5,309
Oneliance, LLC
Schedule of Investments [Line Items]
Cost		6,613		6,615
Fair value		$ 6,552		6,615
SI East, LLC
Schedule of Investments [Line Items]
Total Rate		11.25%
Cost		$ 55,793		90,926
Fair value		70,316		103,436
Slick Innovations, LLC
Schedule of Investments [Line Items]
Cost		13,376		14,154
Fair value		14,890		15,370
Student Resource Center, LLC
Schedule of Investments [Line Items]
Cost		4,770	[5]	4,556	[6]
Fair value		4,770	[5]	4,556	[6]
Superior Rigging & Erecting Co.
Schedule of Investments [Line Items]
Cost		24,905		25,878
Fair value		26,045		25,878
The Affiliati Network, LLC
Schedule of Investments [Line Items]
Cost		15,245		15,948
Fair value		15,116		15,948
UniTek Global Services, Inc.
Schedule of Investments [Line Items]
Cost		18,731	[12]	20,535	[11]
Fair value		12,651	[12]	11,510	[11]
Universal Wellhead Services Holdings, LLC
Schedule of Investments [Line Items]
Cost		5,034	[5]	5,032	[6]
Fair value		220	[5]	220	[6]
World Micro Holdings, LLC
Schedule of Investments [Line Items]
Cost		17,999		17,985
Fair value		17,999		17,985
AB Centers Acquisition Corporation
Schedule of Investments [Line Items]
Cost		20,585	[5]	17,216	[6]
Fair value		21,228	[5]	17,754	[6]
Acousti Engineering Company of Florida
Schedule of Investments [Line Items]
Cost		12,020	[5]	12,294	[6]
Fair value		12,083	[5]	12,376	[6]
Acumera, Inc.
Schedule of Investments [Line Items]
Cost		43,132	[5]	18,561	[6]
Fair value		43,132	[5]	18,986	[6]
Adams Publishing Group, LLC
Schedule of Investments [Line Items]
Cost		29,431	[5]	28,762	[6]
Fair value		29,359	[5]	28,815	[6]
AMEREQUIP LLC.
Schedule of Investments [Line Items]
Cost		38,387	[5]	38,461	[6]
Fair value		39,072	[5]	39,105	[6]
American Health Staffing Group, Inc.
Schedule of Investments [Line Items]
Cost		6,529	[5]	6,555	[6]
Fair value		6,574	[5]	6,607	[6]
American Nuts, LLC
Schedule of Investments [Line Items]
Cost		29,250	[5]	30,816	[6]
Fair value		22,834	[5]	29,260	[6]
American Teleconferencing Services, Ltd.
Schedule of Investments [Line Items]
Cost		16,686	[12]	16,686	[11]
Fair value		782	[12]	976	[11]
ArborWorks, LLC
Schedule of Investments [Line Items]
Cost		34,429	[5]	34,064	[6]
Fair value		26,761	[5]	29,010	[6]
Archer Systems, LLC
Schedule of Investments [Line Items]
Cost		53,571	[5]	67,583	[6]
Fair value		54,665	[5]	67,764	[6]
ATS Operating, LLC
Schedule of Investments [Line Items]
Cost		14,760	[5]	14,040	[6]
Fair value		14,700	[5]	13,835	[6]
AVEX Aviation Holdings, LLC
Schedule of Investments [Line Items]
Cost		21,159	[5]	28,230	[6]
Fair value		21,150	[5]	28,276	[6]
Berry Aviation, Inc.
Schedule of Investments [Line Items]
Cost		0	[5]	1,356	[6]
Fair value		4,250	[5]	5,026	[6]
Bettercloud, Inc.
Schedule of Investments [Line Items]
Cost		27,835	[5]	26,944	[6]
Fair value		28,276	[5]	27,429	[6]
Bluestem Brands, Inc.
Schedule of Investments [Line Items]
Cost		5,090	[12]	3,317	[11]
Fair value		7,318	[12]	9,094	[11]
Bond Brand Loyalty ULC
Schedule of Investments [Line Items]
Cost	[5],[8],[13]	13,137
Fair value	[5],[8],[13]	13,137
Brainworks Software, LLC
Schedule of Investments [Line Items]
Cost		7,817	[5],[14],[15],[16]	7,817	[6]
Fair value		2,143	[5],[14],[15],[16]	3,677	[6]
Brightwood Capital Fund Investments
Schedule of Investments [Line Items]
Cost		13,412	[7],[8]	13,412	[9],[10]
Fair value		11,506	[7],[8]	11,497	[9],[10]
Burning Glass Intermediate Holding Company, Inc.
Schedule of Investments [Line Items]
Cost		20,281	[5]	19,628	[6]
Fair value		20,556	[5]	19,933	[6]
Cadence Aerospace LLC
Schedule of Investments [Line Items]
Cost	[5]	9,261
Fair value	[5]	9,271
CAI Software LLC
Schedule of Investments [Line Items]
Cost		1,789		1,789
Fair value		1,789		1,789
CaseWorthy, Inc.
Schedule of Investments [Line Items]
Cost		14,226	[5]	14,228	[6]
Fair value		14,343	[5]	14,282	[6]
Channel Partners Intermediateco, LLC
Schedule of Investments [Line Items]
Cost		46,813	[5]	40,163	[6]
Fair value		46,834	[5]	40,325	[6]
Computer Data Source, LLC
Schedule of Investments [Line Items]
Cost		23,155	[5]	23,243	[6]
Fair value		21,959	[5]	21,799	[6]
Dalton US Inc.
Schedule of Investments [Line Items]
Cost		17,587	[5]	15,123	[6]
Fair value		18,019	[5]	15,390	[6]
DTE Enterprises, LLC
Schedule of Investments [Line Items]
Cost		1,996	[5]	8,001	[6]
Fair value		1,480	[5]	7,474	[6]
Dynamic Communities, LLC
Schedule of Investments [Line Items]
Cost		3,666	[5]	3,487	[6]
Fair value		3,666	[5]	3,487	[6]
Eastern Wholesale Fence LLC
Schedule of Investments [Line Items]
Cost		30,390	[5]	31,406	[6]
Fair value		29,558	[5]	31,159	[6]
EnCap Energy Fund Investments
Schedule of Investments [Line Items]
Cost		26,626	[7],[8]	28,866	[9],[10]
Fair value		18,084	[7],[8]	21,905	[9],[10]
GS HVAM Intermediate, LLC
Schedule of Investments [Line Items]
Cost		16,568	[5]	16,132	[6]
Fair value		16,871	[5]	16,469	[6]
Escalent, Inc.
Schedule of Investments [Line Items]
Cost	[5]	26,170
Fair value	[5]	26,170
Event Holdco, LLC
Schedule of Investments [Line Items]
Cost		47,666	[5]	47,618	[6]
Fair value		46,363	[5]	45,590	[6]
Flip Electronics LLC
Schedule of Investments [Line Items]
Cost		11,874	[5]	11,588	[6]
Fair value		12,077	[5]	11,831	[6]
Fuse, LLC
Schedule of Investments [Line Items]
Cost		2,066	[12]	2,066	[11]
Fair value		1,374	[12]	1,512	[11]
GS HVAM Intermediate, LLC
Schedule of Investments [Line Items]
Cost		10,631	[5]	12,864	[6]
Fair value		10,659	[5]	12,876	[6]
GULF PACIFIC ACQUISITION, LLC
Schedule of Investments [Line Items]
Cost		4,151	[5]	3,809	[6]
Fair value		4,248	[5]	3,898	[6]
HDC/HW Intermediate Holdings
Schedule of Investments [Line Items]
Cost		3,823	[5]	3,581	[6]
Fair value		3,503	[5]	3,497	[6]
HEADLANDS OP-CO LLC
Schedule of Investments [Line Items]
Cost		16,323	[5]	16,359	[6]
Fair value		16,596	[5]	16,667	[6]
IG Parent Corporation
Schedule of Investments [Line Items]
Cost		14,225	[12],[14],[17]	14,974	[11]
Fair value		14,426	[12],[14],[17]	15,197	[11]
Imaging Business Machines, L.L.C.
Schedule of Investments [Line Items]
Cost	[5]	21,333
Fair value	[5]	21,333
Industrial Services Acquisition, LLC
Schedule of Investments [Line Items]
Cost		21,006	[5]	20,507	[6]
Fair value		20,993	[5]	20,540	[6]
Infolinks Media Buyco, LLC
Schedule of Investments [Line Items]
Cost		9,916	[5]	8,442	[6]
Fair value		10,031	[5]	8,574	[6]
Inspire Aesthetics Management, LLC
Schedule of Investments [Line Items]
Cost	[5]	10,623
Fair value	[5]	10,623
Interface Security Systems, L.L.C
Schedule of Investments [Line Items]
Cost		9,072	[5]	8,919	[6]
Fair value		2,604	[5]	2,764	[6]
Invincible Boat Company, LLC.
Schedule of Investments [Line Items]
Cost		17,422	[5]	17,402	[6]
Fair value		17,034	[5]	17,511	[6]
Isagenix International, LLC
Schedule of Investments [Line Items]
Cost	[12]	2,050
Fair value	[12]	2,074
Jackmont Hospitality, Inc.
Schedule of Investments [Line Items]
Cost		2,776	[5]	2,685	[6]
Fair value		3,178	[5]	3,202	[6]
Joerns Healthcare, LLC
Schedule of Investments [Line Items]
Cost		10,857	[12]	10,723	[11]
Fair value		2,431	[12]	2,801	[11]
JTI Electrical & Mechanical, LLC
Schedule of Investments [Line Items]
Cost		37,527	[5]	37,907	[6]
Fair value		39,016	[5]	39,652	[6]
KMS, LLC
Schedule of Investments [Line Items]
Cost		8,371	[5]	8,410	[6]
Fair value		7,789	[5]	8,017	[6]
LL Management, Inc.
Schedule of Investments [Line Items]
Cost		27,885	[5]	27,980	[6]
Fair value		27,936	[5]	27,926	[6]
Mako Steel, LP
Schedule of Investments [Line Items]
Cost		17,319	[5]	18,185	[6]
Fair value		17,520	[5]	18,307	[6]
MB2 Dental Solutions, LLC
Schedule of Investments [Line Items]
Cost		17,921	[12]	16,051	[11]
Fair value		18,080	[12]	16,214	[11]
Microbe Formulas, LLC
Schedule of Investments [Line Items]
Cost		23,684	[5]	25,556	[6]
Fair value		23,888	[5]	25,118	[6]
MonitorUS Holding, LLC
Schedule of Investments [Line Items]
Cost		31,264	[5],[8],[13]	27,494	[6],[10],[18]
Fair value		32,474	[5],[8],[13]	28,577	[6],[10],[18]
NinjaTrader, LLC
Schedule of Investments [Line Items]
Cost		20,261	[5]	21,379
Fair value		20,438	[5]	21,628
NWN Corporation
Schedule of Investments [Line Items]
Cost		48,462	[5]	49,085	[6]
Fair value		47,668	[5]	47,530	[6]
Paragon Healthcare, Inc.
Schedule of Investments [Line Items]
Cost		21,571	[5]	20,898	[6]
Fair value		22,129	[5]	21,118	[6]
Power System Solutions
Schedule of Investments [Line Items]
Cost	[5]	19,017
Fair value	[5]	19,017
Project Eagle Holdings, LLC
Schedule of Investments [Line Items]
Cost		28,885	[5]	29,022	[6]
Fair value		29,255	[5]	29,401	[6]
PTL US Bidco, Inc
Schedule of Investments [Line Items]
Cost		29,326	[5],[8]	27,575	[6],[10]
Fair value		29,066	[5],[8]	27,737	[6],[10]
RA Outdoors LLC
Schedule of Investments [Line Items]
Cost		13,252	[5]	13,230
Fair value		12,134	[5]	12,083
RM Bidder, LLC
Schedule of Investments [Line Items]
Cost		471	[5]	471	[6]
Fair value		17	[5]	19	[6]
Roof Opco, LLC
Schedule of Investments [Line Items]
Cost		6,629	[5]	5,716	[6]
Fair value		6,751	[5]	5,817	[6]
RTIC Subsidiary Holdings, LLC
Schedule of Investments [Line Items]
Cost		16,821	[5]	17,849	[6]
Fair value		15,630	[5]	16,625	[6]
Rug Doctor, LLC.
Schedule of Investments [Line Items]
Cost		13,994	[5]	13,813	[6]
Fair value		13,265	[5]	12,515	[6]
SIB Holdings, LLC
Schedule of Investments [Line Items]
Cost		9,819	[5]	9,761	[6]
Fair value		8,917	[5]	9,123	[6]
South Coast Terminals Holdings, LLC
Schedule of Investments [Line Items]
Cost		35,410	[5]	41,396	[6]
Fair value		36,240	[5]	42,500	[6]
SPAU Holdings, LLC
Schedule of Investments [Line Items]
Cost		17,100	[5]	16,223	[6]
Fair value		17,316	[5]	16,510	[6]
U.S. TelePacific Corp.
Schedule of Investments [Line Items]
Cost	[12]	3,923
Fair value	[12]	3,924
Veregy Consolidated, Inc.
Schedule of Investments [Line Items]
Cost		16,723	[12]	16,751	[11]
Fair value		14,802	[12]	14,849	[11]
Wall Street Prep, Inc.
Schedule of Investments [Line Items]
Cost		4,099	[5]	4,567	[6]
Fair value		4,162	[5]	4,560	[6]
Watterson Brands, LLC
Schedule of Investments [Line Items]
Cost		30,306	[5]	29,286	[6]
Fair value		30,682	[5]	29,708	[6]
West Star Aviation Acquisition, LLC
Schedule of Investments [Line Items]
Cost		12,069	[5]	12,129	[6]
Fair value		13,084	[5]	12,615	[6]
Winter Services LLC
Schedule of Investments [Line Items]
Cost		11,173	[5]	9,797	[6]
Fair value		11,330	[5]	9,975	[6]
Xenon Arc, Inc.
Schedule of Investments [Line Items]
Cost		64,315	[5]	61,337	[6]
Fair value		65,452	[5]	61,968	[6]
Zips Car Wash, LLC
Schedule of Investments [Line Items]
Cost		21,642	[5]	21,639	[6]
Fair value		21,586	[5]	21,891	[6]
Market Force Information, LLC
Schedule of Investments [Line Items]
Cost				48,847
Fair value				7,700
ATX Networks Corp.
Schedule of Investments [Line Items]
Cost	[11]			8,499
Fair value	[11]			12,211
Flame King Holdings, LLC
Schedule of Investments [Line Items]
Cost				38,975
Fair value				46,380
Rocaceia, LLC (Quality Lease and Rental Holdings, LLC)
Schedule of Investments [Line Items]
Cost				32,365
Fair value				0
Sonic Systems International, LLC
Schedule of Investments [Line Items]
Cost	[6]			16,883
Fair value	[6]			17,049
Independent Pet Partners Intermediate Holdings, LLC
Schedule of Investments [Line Items]
Cost	[6]			30,253
Fair value	[6]			15,429
Control investments
Schedule of Investments [Line Items]
Cost		1,377,194	[2],[19]	1,270,802	[1],[20]
Fair value		$ 1,883,699	[4],[19]	$ 1,703,172	[3],[20]	1,538,158		$ 1,489,257
Investment owned, percent of net assets		83.50%		80.80%
Affiliate investments
Schedule of Investments [Line Items]
Cost		$ 539,826	[2],[21]	$ 635,536	[1],[22]
Fair value		$ 563,125	[4],[21]	$ 618,359	[3],[22]	518,061		549,214
Investment owned, percent of net assets		25%		29.30%
Non‑Control/Non‑Affiliate investments
Schedule of Investments [Line Items]
Cost		$ 1,825,669		$ 1,867,414	[1],[23]	1,825,669	[2],[24]
Fair value		$ 1,763,719		$ 1,780,646	[3],[23]	1,763,719	[4],[24]
Investment owned, percent of net assets		78.20%		84.40%
Investment, Identifier [Axis]: 2717 MH, L.P., LP Interests (2717 HPP-MS, L.P.)
Schedule of Investments [Line Items]
Fair value		$ 315		$ 248		244		0
Investment, Identifier [Axis]: 2717 MH, L.P., LP Interests (2717 MH, L.P.)
Schedule of Investments [Line Items]
Fair value		6,346		7,552		6,554		3,971
Investment, Identifier [Axis]: 423 HAR, LP, LP Interests (423 HAR, L.P.)
Schedule of Investments [Line Items]
Fair value		$ 750		$ 0
Investment, Identifier [Axis]: AAC Holdings, Inc., Common Stock
Schedule of Investments [Line Items]
Units (in shares)		593,928	[12]	593,928	[11]
Cost		$ 3,148	[12]	$ 3,148	[11]
Fair value		$ 0	[12]	$ 0	[11]	$ 800		2,079
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate				18%	[11]	18%
PIK Rate				18%	[11]	8%
Principal	[11]			$ 11,726
Cost	[11]			11,590
Fair value				11,550	[11]	$ 10,090		9,794
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[12]	18%
PIK Rate	[12]	18%
Principal	[12]	$ 381
Cost	[12]	376
Fair value		$ 360	[12]	0
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[12]	18%
PIK Rate	[12]	18%
Principal	[12]	$ 12,848
Cost	[12]	12,739
Fair value		$ 12,141	[12]	$ 11,550
Investment, Identifier [Axis]: AAC Holdings, Inc., Warrants
Schedule of Investments [Line Items]
Units (in shares)		554,353	[12],[25]	554,353	[11],[26]
Cost		$ 0	[12],[25]	$ 0	[11],[26]
Fair value		$ 0	[12],[25]	$ 0	[11],[26]	740		1,940
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		5%	[5],[14],[27]	6%	[6],[28],[29],[30]
Principal		$ 0	[5],[14],[27]	$ 0	[6],[28],[29],[30]
Cost		(68)	[5],[14],[27]	(39)	[6],[28],[29],[30]
Fair value		$ (68)	[5],[14],[27]	$ (39)	[6],[28],[29],[30]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[6],[28],[29]			10.20%
Reference Rate and Spread		6%	[5],[14],[17],[27]	6%	[6],[28],[29]
Principal		$ 0	[5],[14],[17],[27]	$ 741	[6],[28],[29]
Cost		(83)	[5],[14],[17],[27]	653	[6],[28],[29]
Fair value		$ 0	[5],[14],[17],[27]	$ 741	[6],[28],[29]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.20%	[5],[14],[17]	10.58%	[6],[28],[29]
Reference Rate and Spread		6%	[5],[14],[17]	6%	[6],[28],[29]
Principal		$ 21,296	[5],[14],[17]	$ 17,052	[6],[28],[29]
Cost		20,736	[5],[14],[17]	16,602	[6],[28],[29]
Fair value		$ 21,296	[5],[14],[17]	$ 17,052	[6],[28],[29]
Investment, Identifier [Axis]: ADS Tactical, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.94%	[12],[14],[17]	10.14%	[11],[29]
Reference Rate and Spread		5.75%	[12],[14],[17]	5.75%	[11],[29]
Principal		$ 20,424	[12],[14],[17]	$ 21,077	[11],[29]
Cost		20,181	[12],[14],[17]	20,781	[11],[29]
Fair value		19,492	[12],[14],[17]	$ 18,969	[11],[29]
Investment, Identifier [Axis]: AFG Capital Group, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)	[31]			186
Cost	[31]			$ 1,200
Fair value		$ 0		$ 9,400	[31]	$ 8,780		7,740
Investment, Identifier [Axis]: AFG Capital Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						10%
Fair value						$ 0		144
Investment, Identifier [Axis]: AMEREQUIP LLC., Common Stock
Schedule of Investments [Line Items]
Units (in shares)		235	[5],[32]	235	[6]
Cost		$ 1,844	[5],[32]	$ 1,779	[6]
Fair value		$ 1,930	[5],[32]	$ 1,779	[6]
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		7.40%	[5],[14],[17],[27]	7.40%	[6],[28],[29],[30]
Principal		$ 0	[5],[14],[17],[27]	$ 0	[6],[28],[29],[30]
Cost		(122)	[5],[14],[17],[27]	(137)	[6],[28],[29],[30]
Fair value		$ (122)	[5],[14],[17],[27]	$ (137)	[6],[28],[29],[30]
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.70%	[5],[14],[17]	11.72%	[6],[28],[29]
Reference Rate and Spread		7.40%	[5],[14],[17]	7.40%	[6],[28],[29]
Principal		$ 37,264	[5],[14],[17]	$ 37,491	[6],[28],[29]
Cost		36,665	[5],[14],[17]	36,819	[6],[28],[29]
Fair value		$ 37,264	[5],[14],[17]	$ 37,463	[6],[28],[29]
Investment, Identifier [Axis]: ASC Interests, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,500		1,500
Cost		$ 1,594		$ 1,500
Fair value		$ 510		$ 800		$ 800		720
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13%		13%		13%
Principal		$ 400		$ 400
Cost		400		400
Fair value		$ 400		$ 400		$ 170		200
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%		13%		13%
Principal		$ 1,650		$ 1,650
Cost		1,649		1,649
Fair value		$ 1,597		$ 1,649		$ 1,648		1,636
Investment, Identifier [Axis]: ATS Operating, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		720,000	[5]	720,000	[6]
Cost		$ 720	[5]	$ 720	[6]
Fair value		$ 660	[5]	$ 660	[6]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	11.75%
Reference Rate and Spread		6.50%	[5],[14],[17]	5.50%	[6],[28],[29],[30]
Principal		$ 720	[5],[14],[17]	$ 0	[6],[28],[29],[30]
Cost		720	[5],[14],[17]	0	[6],[28],[29],[30]
Fair value		$ 720	[5],[14],[17]	$ 0	[6],[28],[29],[30]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.65%	[5],[14],[17]	9.32%	[6],[28],[29]
Reference Rate and Spread		5.50%	[5],[14],[17]	5.50%	[6],[28],[29]
Principal		$ 6,660	[5],[14],[17]	$ 6,660	[6],[28],[29]
Cost		6,660	[5],[14],[17]	6,660	[6],[28],[29]
Fair value		$ 6,660	[5],[14],[17]	$ 6,582	[6],[28],[29]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.65%	[5],[14],[17]	11.32%	[6],[28],[29]
Reference Rate and Spread		7.50%	[5],[14],[17]	7.50%	[6],[28],[29]
Principal		$ 6,660	[5],[14],[17]	$ 6,660	[6],[28],[29]
Cost		6,660	[5],[14],[17]	6,660	[6],[28],[29]
Fair value		$ 6,660	[5],[14],[17]	$ 6,593	[6],[28],[29]
Investment, Identifier [Axis]: ATS Workholding, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		3,725,862	[5]	3,725,862	[6]
Cost		$ 3,726	[5]	$ 3,726	[6]
Fair value		$ 0	[5]	$ 0	[6]
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						5%
Fair value						$ 2,939		3,005
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		5%	[5],[16]	5%	[6],[33]
Principal		$ 2,027	[5],[16]	$ 1,901	[6],[33]
Cost		2,027	[5],[16]	1,901	[6],[33]
Fair value		$ 483	[5],[16]	$ 634	[6],[33]
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		5%	[5],[16]	5%	[6],[33]
Principal		$ 3,015	[5],[16]	$ 3,015	[6],[33]
Cost		2,855	[5],[16]	2,857	[6],[33]
Fair value		719	[5],[16]	$ 1,005	[6],[33]
Investment, Identifier [Axis]: ATX Networks Corp., Common Stock
Schedule of Investments [Line Items]
Units (in shares)	[11]			583
Cost	[11]			$ 0
Fair value		$ 0		$ 3,270	[11]
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate				12.23%	[11],[29]	8.92%
Reference Rate and Spread		7.50%		7.50%	[11],[29]	7.50%
Principal	[11],[29]			$ 6,783
Cost	[11],[29]			6,208
Fair value		$ 0		$ 6,343	[11],[29]	$ 6,187		7,092
Investment, Identifier [Axis]: ATX Networks Corp., Unsecured Debt
Schedule of Investments [Line Items]
Total Rate				10%	[11]	10%
PIK Rate				10%	[11]	10%
Principal	[11]			$ 3,396
Cost	[11]			2,291
Fair value		$ 0		$ 2,598	[11]	$ 2,242		1,963
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)		984	[5]	360	[6]
Cost		$ 965	[5]	$ 360	[6]
Fair value		$ 1,011	[5]	$ 406	[6]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	12.63%
Reference Rate and Spread		7.25%	[5],[14],[17]	7.25%	[6],[28],[29],[30]
Principal		$ 1,474	[5],[14],[17]	$ 0	[6],[28],[29],[30]
Cost		1,339	[5],[14],[17]	(57)	[6],[28],[29],[30]
Fair value		$ 1,425	[5],[14],[17]	$ (57)	[6],[28],[29],[30]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.65%	[5],[14],[17]	12.17%	[6],[28],[29]
Reference Rate and Spread		7.25%	[5],[14],[17]	7.25%	[6],[28],[29]
Principal		$ 19,346	[5],[14],[17]	$ 29,071	[6],[28],[29]
Cost		18,855	[5],[14],[17]	27,927	[6],[28],[29]
Fair value		$ 18,714	[5],[14],[17]	$ 27,927	[6],[28],[29]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.75%	[5],[14]	13.23%	[6],[29]
Reference Rate and Spread		7.50%	[5],[14]	8.50%	[6],[29]
Principal		$ 1,678	[5],[14]	$ 1,678	[6],[29]
Cost		1,673	[5],[14]	1,669	[6],[29]
Fair value		$ 1,678	[5],[14]	$ 1,678	[6],[29]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.75%	[5],[14]	13.23%	[6],[29]
Reference Rate and Spread		7.50%	[5],[14]	8.50%	[6],[29]
Principal		$ 9,620	[5],[14]	$ 9,891	[6],[29]
Cost		9,567	[5],[14]	9,825	[6],[29]
Fair value		$ 9,620	[5],[14]	$ 9,891	[6],[29]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		19.75%	[5],[14]	16.17%	[6],[29]
Reference Rate and Spread		11.50%	[5],[14]	12.50%	[6],[29]
Principal		$ 785	[5],[14]	$ 807	[6],[29]
Cost		780	[5],[14]	800	[6],[29]
Fair value		$ 785	[5],[14]	$ 807	[6],[29]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[6],[29]			13.88%
Reference Rate and Spread		7.50%	[5],[14],[17],[27]	9.50%	[6],[29]
Principal		$ 0	[5],[14],[17],[27]	$ 14,618	[6],[29]
Cost		(30)	[5],[14],[17],[27]	14,291	[6],[29]
Fair value		$ (30)	[5],[14],[17],[27]	$ 14,618	[6],[29]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.85%	[5],[14],[17]	13.57%	[6],[29]
Reference Rate and Spread		7.50%	[5],[14],[17]	9%	[6],[29]
Principal		$ 43,656	[5],[14],[17]	$ 4,368	[6],[29]
Cost		43,162	[5],[14],[17]	4,270	[6],[29]
Fair value		$ 43,162	[5],[14],[17]	$ 4,368	[6],[29]
Investment, Identifier [Axis]: Acumera, Inc., Warrants
Schedule of Investments [Line Items]
Units (in shares)	[5],[34]	47,352
Cost	[5],[34]	$ 0
Fair value	[5],[34]	$ 0
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10%	[5],[14],[17],[35]	10%	[6],[29],[36]
Reference Rate and Spread		7%	[5],[14],[17],[35]	6%	[6],[29],[36]
Principal		$ 7,094	[5],[14],[17],[35]	$ 4,729	[6],[29],[36]
Cost		7,094	[5],[14],[17],[35]	4,729	[6],[29],[36]
Fair value		$ 6,976	[5],[14],[17],[35]	$ 4,729	[6],[29],[36]
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%	[5],[14],[17],[35]	10%	[6],[29],[36]
Reference Rate and Spread		7%	[5],[14],[17],[35]	7.50%	[6],[29],[36]
Principal		$ 22,383	[5],[14],[17],[35]	$ 24,086	[6],[29],[36]
Cost		22,337	[5],[14],[17],[35]	24,033	[6],[29],[36]
Fair value		$ 22,383	[5],[14],[17],[35]	$ 24,086	[6],[29],[36]
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[5],[14],[27]	6%	[6],[29],[30]
Principal		$ 0	[5],[14],[27]	$ 0	[6],[29],[30]
Cost		(9)	[5],[14],[27]	(10)	[6],[29],[30]
Fair value		$ (9)	[5],[14],[27]	$ (10)	[6],[29],[30]
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.43%	[5],[14]	11.12%	[6],[29]
Reference Rate and Spread		6%	[5],[14]	6%	[6],[29]
Principal		$ 6,583	[5],[14]	$ 6,617	[6],[29]
Cost		6,538	[5],[14]	6,565	[6],[29]
Fair value		$ 6,583	[5],[14]	$ 6,617	[6],[29]
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.79%	[5],[14],[17]	10.46%	[6],[28],[29]
Reference Rate and Spread		6.75%	[5],[14],[17]	6.75%	[6],[28],[29]
Principal		$ 14,800	[5],[14],[17]	$ 15,628	[6],[28],[29]
Cost		14,625	[5],[14],[17]	15,408	[6],[28],[29]
Fair value		$ 12,216	[5],[14],[17]	$ 14,606	[6],[28],[29]
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.79%	[5],[14],[16],[17]	12.46%	[6],[28],[29]
Reference Rate and Spread		8.75%	[5],[14],[16],[17]	8.75%	[6],[28],[29]
PIK Rate	[5],[14],[16],[17]	1%
Principal		$ 14,800	[5],[14],[16],[17]	$ 15,628	[6],[28],[29]
Cost		14,625	[5],[14],[16],[17]	15,408	[6],[28],[29]
Fair value		$ 10,618	[5],[14],[16],[17]	$ 14,654	[6],[28],[29]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		7.50%	[12],[15],[16]	7.50%	[11],[33]
Reference Rate and Spread		6.50%	[12],[15],[16]	6.50%	[11],[33]
Principal		$ 2,980	[12],[15],[16]	$ 2,980	[11],[33]
Cost		2,980	[12],[15],[16]	2,980	[11],[33]
Fair value		$ 135	[12],[15],[16]	$ 168	[11],[33]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		7.50%	[12],[14],[15],[16]	7.50%	[11],[29],[33]
Reference Rate and Spread		6.50%	[12],[14],[15],[16]	6.50%	[11],[29],[33]
Principal		$ 14,370	[12],[14],[15],[16]	$ 14,370	[11],[29],[33]
Cost		13,706	[12],[14],[15],[16]	13,706	[11],[29],[33]
Fair value		647	[12],[14],[15],[16]	808	[11],[29],[33]
Investment, Identifier [Axis]: Amounts related to investments transferred to or from other 1940 Act classification during the period, Affiliate Investments
Schedule of Investments [Line Items]
Fair value		0		14,914		0		32,597
Investment, Identifier [Axis]: Amounts related to investments transferred to or from other 1940 Act classification during the period, Control Investments
Schedule of Investments [Line Items]
Fair value		$ 0		$ (14,914)		0		41,748
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Fair value						$ 4,318		4,894
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		3,200		3,200
Total Rate		14.13%		14.13%
Cost		$ 3,200		$ 3,200
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		2,427		2,427
Cost		$ 2,427		$ 2,427
Fair value		$ 4,070		$ 3,504
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						12%
Reference Rate and Spread						10%
Fair value						$ 4,641		4,736
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		10%	[14],[27]	10%	[29],[30]
Principal		$ 0	[14],[27]	$ 0	[29],[30]
Cost		(2)	[14],[27]	(3)	[29],[30]
Fair value		$ (2)	[14],[27]	$ (3)	[29],[30]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.25%	[14]	14.13%	[29]
Reference Rate and Spread		10%	[14]	10%	[29]
Principal		$ 4,525	[14]	$ 4,665	[29]
Cost		4,444	[14]	4,545	[29]
Fair value		$ 4,444	[14]	$ 4,545	[29]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Warrants
Schedule of Investments [Line Items]
Units (in shares)		420	[25]	420	[26]
Cost		$ 316	[25]	$ 316	[26]
Fair value		$ 0	[25]	$ 0	[26]
Investment, Identifier [Axis]: ArborWorks, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)		234	[5]	234	[6]
Cost		$ 234	[5]	$ 234	[6]
Fair value		$ 0	[5]	$ 0	[6]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.25%	[5],[14],[17]	13.41%	[6],[29]
Reference Rate and Spread		7%	[5],[14],[17]	9%	[6],[29]
PIK Rate	[5],[14],[17]	3%
Principal		$ 4,928	[5],[14],[17]	$ 4,678	[6],[29]
Cost		4,833	[5],[14],[17]	4,569	[6],[29]
Fair value		$ 3,799	[5],[14],[17]	$ 3,945	[6],[29]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.23%	[5],[14],[17]	13.56%	[6],[29]
Reference Rate and Spread		7%	[5],[14],[17]	9%	[6],[29]
PIK Rate	[5],[14],[17]	14.40%
Principal		$ 29,789	[5],[14],[17]	$ 29,722	[6],[29]
Cost		29,362	[5],[14],[17]	29,261	[6],[29]
Fair value		$ 22,962	[5],[14],[17]	$ 25,065	[6],[29]
Investment, Identifier [Axis]: Archer Systems, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		1,387,832	[5]	1,387,832	[6]
Cost		$ 1,388	[5]	$ 1,388	[6]
Fair value		$ 1,940	[5]	$ 1,388	[6]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[5],[14],[17],[27]	6.50%	[6],[28],[29],[30]
Principal		$ 0	[5],[14],[17],[27]	$ 0	[6],[28],[29],[30]
Cost		(121)	[5],[14],[17],[27]	(135)	[6],[28],[29],[30]
Fair value		$ (121)	[5],[14],[17],[27]	$ (135)	[6],[28],[29],[30]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.39%	[5],[14],[17]	10.92%	[6],[28],[29]
Reference Rate and Spread		6%	[5],[14],[17]	6.50%	[6],[28],[29]
Principal		$ 53,233	[5],[14],[17]	$ 67,597	[6],[28],[29]
Cost		52,304	[5],[14],[17]	66,330	[6],[28],[29]
Fair value		$ 52,846	[5],[14],[17]	$ 66,511	[6],[28],[29]
Investment, Identifier [Axis]: Arrow International, Inc, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[6],[28],[29],[37]			10.36%
Reference Rate and Spread	[6],[28],[29],[37]			6.60%
Principal	[6],[28],[29],[37]			$ 36,000
Cost	[6],[28],[29],[37]			35,737
Fair value	[6],[28],[29],[37]			$ 36,000
Investment, Identifier [Axis]: BBB Tank Services, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		800,000		800,000
Cost		$ 800		$ 800
Fair value		$ 0		$ 0		0		0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Preferred Stock (non-voting)
Schedule of Investments [Line Items]
Total Rate		15%		15%
Cost		$ 162		$ 162
Fair value		$ 0		$ 0		$ 0		0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt
Schedule of Investments [Line Items]
Total Rate						12.06%
Reference Rate and Spread						11%
Fair value						$ 2,298		2,507
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 1
Schedule of Investments [Line Items]
Total Rate		16.17%	[14],[15]	15.12%	[29],[38]
Reference Rate and Spread		11%	[14],[15]	11%	[29],[38]
Principal		$ 800	[14],[15]	$ 800	[29],[38]
Cost		800	[14],[15]	800	[29],[38]
Fair value		$ 800	[14],[15]	$ 800	[29],[38]
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 2
Schedule of Investments [Line Items]
Total Rate		16.17%	[14],[15]	15.12%	[29],[38]
Reference Rate and Spread		11%	[14],[15]	11%	[29],[38]
Principal		$ 4,000	[14],[15]	$ 4,000	[29],[38]
Cost		4,000	[14],[15]	4,000	[29],[38]
Fair value		$ 2,202	[14],[15]	$ 2,086	[29],[38]
Investment, Identifier [Axis]: Barfly Ventures, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		37	[5]	37	[6]
Cost		$ 1,584	[5]	$ 1,584	[6]
Fair value		$ 3,040	[5]	$ 3,320	[6]	$ 2,400		1,930
Investment, Identifier [Axis]: Barfly Ventures, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		7%	[5]	7%	[6]	7%
Principal		$ 711	[5]	$ 711	[6]
Cost		711	[5]	711	[6]
Fair value		$ 711	[5]	$ 711	[6]	$ 711		711
Investment, Identifier [Axis]: Batjer TopCo, LLC, Member Units
Schedule of Investments [Line Items]
Fair value						$ 4,073		0
Investment, Identifier [Axis]: Batjer TopCo, LLC, Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		4,073	[32]	4,073	[31]
Cost		$ 4,095	[32]	$ 4,095	[31]
Fair value		6,150	[32]	4,095	[31]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						11%
Fair value						$ 10,913		0
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[27]	0	[30]
Cost		(7)	[27]	(8)	[30]
Fair value		$ 0	[27]	(8)	[30]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%
Principal		$ 10,575		0	[30]
Cost		10,497		0	[30]
Fair value		10,575		0	[30]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10%		11%
Principal				$ 11,025
Cost				10,933
Fair value		$ 10,575		$ 10,933
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		1,548,387	[5],[32],[39]	1,548,387	[6],[31],[40]
Total Rate	[6],[31],[40]			8%
PIK Rate	[6],[31],[40]			8%
Cost		$ 0	[5],[32],[39]	$ 1,161	[6],[31],[40]
Fair value		$ 3,940	[5],[32],[39]	$ 4,561	[6],[31],[40]
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		122,416	[5],[32],[39]	122,416	[6],[30],[31],[40]
PIK Rate	[6],[30],[31],[40]			16%
Cost		$ 0	[5],[32],[39]	$ 0	[6],[30],[31],[40]
Fair value		$ 310	[5],[32],[39]	$ 270	[6],[30],[31],[40]
Investment, Identifier [Axis]: Berry Aviation, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[6]			12%
PIK Rate	[6]			1.50%
Principal	[6]			$ 195
Cost	[6]			195
Fair value	[6]			$ 195
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		7%	[5],[14],[17],[27]	1%	[6],[28],[29],[30]
PIK Rate	[6],[28],[29],[30]			6%
Principal		$ 0	[5],[14],[17],[27]	$ 0	[6],[28],[29],[30]
Cost		(69)	[5],[14],[17],[27]	(76)	[6],[28],[29],[30]
Fair value		$ (69)	[5],[14],[17],[27]	$ (76)	[6],[28],[29],[30]
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.26%	[5],[14],[17]	11.40%	[6],[28],[29]
Reference Rate and Spread		7%	[5],[14],[17]	1%	[6],[28],[29]
PIK Rate		6%	[5],[14],[17]	6%	[6],[28],[29]
Principal		$ 28,345	[5],[14],[17]	$ 27,505	[6],[28],[29]
Cost		27,904	[5],[14],[17]	27,020	[6],[28],[29]
Fair value		$ 28,345	[5],[14],[17]	$ 27,505	[6],[28],[29]
Investment, Identifier [Axis]: Binswanger Enterprises, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,050,000	[5]	1,050,000	[6]
Cost		$ 1,050	[5]	$ 1,050	[6]
Fair value		$ 180	[5]	$ 420	[6]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Common Stock
Schedule of Investments [Line Items]
Units (in shares)		723,184	[12]	723,184	[11],[31]
Cost		$ 1	[12]	$ 1	[11],[31]
Fair value		$ 2,265	[12]	$ 4,860	[11],[31]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[12],[14]	15.75%
Reference Rate and Spread		7.50%	[12],[14]	8.50%	[11],[29],[30]
PIK Rate	[12],[14]	14.75%
Principal		$ 1,418	[12],[14]	$ 0	[11],[29],[30]
Cost		1,418	[12],[14]	0	[11],[29],[30]
Fair value		$ 1,333	[12],[14]	$ 0	[11],[29],[30]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.77%	[12],[14],[17]	12.94%	[11],[29]
Reference Rate and Spread		8.50%	[12],[14],[17]	8.50%	[11],[29]
PIK Rate	[12],[14],[17]	12.77%
Principal		$ 3,415	[12],[14],[17]	$ 3,239	[11],[29]
Cost		2,635	[12],[14],[17]	2,280	[11],[29]
Fair value		$ 3,210	[12],[14],[17]	$ 3,139	[11],[29]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Warrants
Schedule of Investments [Line Items]
Units (in shares)		163,295	[12],[25]	163,295	[11],[26]
Cost		$ 1,036	[12],[25]	$ 1,036	[11],[26]
Fair value		$ 510	[12],[25]	$ 1,095	[11],[26]
Investment, Identifier [Axis]: Boccella Precast Products LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		2,160,000		2,160,000	[31]
Cost		$ 2,256		$ 2,256	[31]
Fair value		$ 2,350		$ 2,970	[31]	$ 4,510		4,830
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10%		10%		10%
Principal		$ 320		$ 320
Cost		320		320
Fair value		$ 320		$ 320		$ 320		320
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class B Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		140,000	[32]	140,000	[31]
Total Rate		8%	[32]	8%	[31]
Cost		$ 14,000	[32]	$ 14,000	[31]
Fair value		$ 31,120	[32]	$ 31,420	[31]	$ 25,930		23,170
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.37%	[14],[17],[41]	13.39%	[28],[29],[42]	10.50%
Reference Rate and Spread		9.19%	[14],[17],[41]	9.26%	[28],[29],[42]	9%
Principal		$ 97,875	[14],[17],[41]	$ 99,194	[28],[29],[42]
Cost		97,328	[14],[17],[41]	98,576	[28],[29],[42]
Fair value		97,875	[14],[17],[41]	99,194	[28],[29],[42]	$ 49,194		39,000
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Fair value		$ 0		0
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.37%
Reference Rate and Spread		9.19%
Fair value		$ 97,875		$ 99,194
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)	[5],[8],[13]	571
Cost	[5],[8],[13]	$ 571
Fair value	[5],[8],[13]	$ 571
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread	[5],[8],[13],[14],[17],[27]	7%
Principal	[5],[8],[13],[14],[17],[27]	$ 0
Cost	[5],[8],[13],[14],[17],[27]	(28)
Fair value	[5],[8],[13],[14],[17],[27]	$ (28)
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[5],[8],[13],[14],[17]	11.19%
Reference Rate and Spread	[5],[8],[13],[14],[17]	6%
Principal	[5],[8],[13],[14],[17]	$ 6,421
Cost	[5],[8],[13],[14],[17]	6,297
Fair value	[5],[8],[13],[14],[17]	$ 6,297
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[5],[8],[13],[14],[17]	13.19%
Reference Rate and Spread	[5],[8],[13],[14],[17]	8%
Principal	[5],[8],[13],[14],[17]	$ 6,421
Cost	[5],[8],[13],[14],[17]	6,297
Fair value	[5],[8],[13],[14],[17]	$ 6,297
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.50%	[5],[14],[15],[16]	12.50%	[6],[29],[33],[38]
Reference Rate and Spread		9.25%	[5],[14],[15],[16]	9.25%	[6],[29],[33],[38]
Principal		$ 761	[5],[14],[15],[16]	$ 761	[6],[29],[33],[38]
Cost		761	[5],[14],[15],[16]	761	[6],[29],[33],[38]
Fair value		$ 761	[5],[14],[15],[16]	$ 761	[6],[29],[33],[38]
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%	[5],[14],[15],[16]	12.50%	[6],[29],[33],[38]
Reference Rate and Spread		9.25%	[5],[14],[15],[16]	9.25%	[6],[29],[33],[38]
Principal		$ 7,056	[5],[14],[15],[16]	$ 7,056	[6],[29],[33],[38]
Cost		7,056	[5],[14],[15],[16]	7,056	[6],[29],[33],[38]
Fair value		$ 1,382	[5],[14],[15],[16]	$ 2,916	[6],[29],[33],[38]
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		2,950	[32]	2,950	[31]
Cost		$ 4,280	[32]	$ 4,280	[31]
Fair value		$ 6,360	[32]	$ 7,080	[31]	$ 7,050		7,710
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.17%	[14]	14.12%	[29]	11.06%
Reference Rate and Spread		10%	[14]	10%	[29]	10%
Principal		$ 5,716	[14]	$ 5,964	[29]
Cost		5,716	[14]	5,964	[29]
Fair value		5,653	[14]	$ 5,964	[29]	$ 7,801		8,037
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)	[31],[40]			17,742
Cost	[31],[40]			$ 1,000
Fair value		$ 1,000		$ 1,000	[31],[40]	$ 1,000		1,000
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)	[32],[39]	17,742
Cost	[32],[39]	$ 1,000
Fair value	[32],[39]	$ 1,000
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13%		13%		13%
Principal		$ 8,813		$ 8,813
Cost		8,813		8,813
Fair value		$ 8,813		$ 8,813		$ 8,813		8,813
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%	[39]	13%	[40]	13%
Principal		$ 1,000	[39]	$ 1,000	[40]
Cost		1,000	[39]	1,000	[40]
Fair value		$ 1,000	[39]	$ 1,000	[40]	$ 1,000		1,000
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants
Schedule of Investments [Line Items]
Units (in shares)		82	[25]	82	[26]
Cost		$ 2,132	[25]	$ 2,132	[26]
Fair value		4,450	[25]	4,340	[26]	$ 4,260		4,060
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants 1
Schedule of Investments [Line Items]
Fair value		1,874		1,828
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants 2
Schedule of Investments [Line Items]
Fair value		$ 2,576		$ 2,512
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund III, LP)
Schedule of Investments [Line Items]
Units (percentage)		1.55%	[7],[8],[43]	1.55%	[9],[10],[31],[44]
Cost		$ 7,062	[7],[8],[43]	$ 7,062	[9],[10],[31],[44]
Fair value		$ 4,586	[7],[8],[43]	$ 4,727	[9],[10],[31],[44]
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund IV, LP)
Schedule of Investments [Line Items]
Units (percentage)		0.59%	[7],[8],[32],[43]	0.59%	[9],[10],[31],[44]
Cost		$ 4,350	[7],[8],[32],[43]	$ 4,350	[9],[10],[31],[44]
Fair value		$ 4,589	[7],[8],[32],[43]	$ 4,541	[9],[10],[31],[44]
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund V, LP)
Schedule of Investments [Line Items]
Units (percentage)		1.31%	[7],[8],[32],[43]	1.31%	[9],[10],[44]
Cost		$ 2,000	[7],[8],[32],[43]	$ 2,000	[9],[10],[44]
Fair value		$ 2,331	[7],[8],[32],[43]	$ 2,229	[9],[10],[44]
Investment, Identifier [Axis]: Buca C, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		6		6
Total Rate		6%		6%
PIK Rate		6%		6%
Cost		$ 4,770		$ 4,770
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		9%		10.37%
Reference Rate and Spread						9.25%
Principal		$ 16,980		$ 17,355
Cost		16,980		17,355
Fair value		$ 11,964		$ 12,337		$ 13,149		14,370
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	10.20%
Reference Rate and Spread		5%	[5],[14],[17]	5%	[6],[29],[30]
Principal		$ 774	[5],[14],[17]	$ 0	[6],[29],[30]
Cost		751	[5],[14],[17]	(28)	[6],[29],[30]
Fair value		$ 774	[5],[14],[17]	$ 0	[6],[29],[30]
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.20%	[5],[14],[17]	8.91%	[6],[29]
Reference Rate and Spread		5%	[5],[14],[17]	5%	[6],[29]
Principal		$ 19,782	[5],[14],[17]	$ 19,933	[6],[29]
Cost		19,530	[5],[14],[17]	19,656	[6],[29]
Fair value		$ 19,782	[5],[14],[17]	$ 19,933	[6],[29]
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 1
Schedule of Investments [Line Items]
Units (in shares)		1,788,527		1,788,527	[31]
Cost		$ 1,789		$ 1,789	[31]
Fair value		$ 1,789		$ 1,789	[31]
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 2
Schedule of Investments [Line Items]
Units (in shares)		596,176		596,176
Cost		$ 0		$ 0
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: CBT Nuggets, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		416	[32]	416	[31]
Cost		$ 1,300	[32]	$ 1,300	[31]
Fair value		50,570	[32]	$ 49,002	[31]	47,900		50,620
Investment, Identifier [Axis]: CMS Minerals Investments, Member Units
Schedule of Investments [Line Items]
Units (in shares)	[31],[40]			100
Cost	[31],[40]			$ 1,304
Fair value		$ 0		$ 1,670	[31],[40]	2,274		1,974
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[6],[29],[45]			11.99%
Reference Rate and Spread	[6],[29],[45]			8.50%
PIK Rate	[6],[29],[45]			0.01%
Principal	[6],[29],[45]			$ 28,328
Cost	[6],[29],[45]			28,264
Fair value	[6],[29],[45]			$ 28,328
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	13.91%
Reference Rate and Spread	[5],[14],[17]	6.50%
PIK Rate	[5],[14],[17]	2%
Principal	[5],[14],[17]	$ 5,044
Cost	[5],[14],[17]	5,038
Fair value	[5],[14],[17]	$ 5,044
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	13.91%
Reference Rate and Spread	[5],[14],[17]	6.50%
PIK Rate	[5],[14],[17]	2%
Principal	[5],[14],[17]	$ 1,569
Cost	[5],[14],[17]	1,568
Fair value	[5],[14],[17]	$ 1,569
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	13.91%
Reference Rate and Spread	[5],[14],[17]	6.50%
PIK Rate	[5],[14],[17]	2%
Principal	[5],[14],[17]	$ 2,064
Cost	[5],[14],[17]	2,062
Fair value	[5],[14],[17]	$ 2,064
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	13.91%
Reference Rate and Spread	[5],[14],[17]	6.50%
PIK Rate	[5],[14],[17]	2%
Principal	[5],[14],[17]	$ 594
Cost	[5],[14],[17]	593
Fair value	[5],[14],[17]	$ 594
Investment, Identifier [Axis]: Café Brazil, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,233	[32]	1,233	[31]
Cost		$ 1,742	[32]	$ 1,742	[31]
Fair value		$ 2,130	[32]	$ 2,210	[31]	$ 2,520		2,570
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		6,157	[32]	6,157	[31]
Total Rate						15%
PIK Rate						15%
Cost		$ 10,775	[32]	$ 10,775	[31]
Fair value		$ 23,435	[32]	$ 25,495	[31]	$ 3,713		9,510
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		3,671	[32]	3,671	[31]
Total Rate		15%	[32]	15%	[31]
PIK Rate		15%	[32]	15%	[31]
Cost		$ 4,295	[32]	$ 3,994	[31]
Fair value		$ 4,295	[32]	$ 3,994	[31]	$ 19,295		13,275
Investment, Identifier [Axis]: California Splendor Holdings LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.25%	[14]	13.75%	[29]	11%
Reference Rate and Spread		10%	[14]	10%	[29]	10%
Principal		$ 28,000	[14]	$ 28,000	[29]
Cost		27,958	[14]	27,951	[29]
Fair value		$ 28,000	[14]	$ 28,000	[29]	$ 28,000		27,915
Investment, Identifier [Axis]: Camin Cargo Control, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.72%	[12],[14],[17]	10.88%	[11],[29]
Reference Rate and Spread		6.50%	[12],[14],[17]	6.50%	[11],[29]
Principal		$ 15,138	[12],[14],[17]	$ 15,218	[11],[29]
Cost		15,047	[12],[14],[17]	15,110	[11],[29]
Fair value		$ 14,608	[12],[14],[17]	$ 14,685	[11],[29]
Investment, Identifier [Axis]: Career Team Holdings, LLC, Class A Common Units
Schedule of Investments [Line Items]
Fair value						$ 4,500		4,499
Investment, Identifier [Axis]: Career Team Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		450,000		450,000
Cost		$ 4,500		$ 4,500
Fair value		$ 4,500		$ 4,500
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						12.50%
Fair value						$ 20,070		20,050
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[14]	11.25%
Reference Rate and Spread		6%	[14]	6%	[29],[30]
Principal		$ 450	[14]	$ 0	[29],[30]
Cost		442	[14]	(9)	[29],[30]
Fair value		$ 442	[14]	$ (9)	[29],[30]
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%		12.50%
Principal		$ 20,250		$ 20,250
Cost		20,110		20,090
Fair value		$ 20,110		$ 20,090
Investment, Identifier [Axis]: CaseWorthy, Inc., Common Equity
Schedule of Investments [Line Items]
Units (in shares)		245,926	[5]	245,926	[6]
Cost		$ 246	[5]	$ 246	[6]
Fair value		$ 246	[5]	$ 246	[6]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[5],[14],[17],[27]	6%	[6],[29],[30]
Principal		$ 0	[5],[14],[17],[27]	$ 0	[6],[29],[30]
Cost		(9)	[5],[14],[17],[27]	(11)	[6],[29],[30]
Fair value		$ (9)	[5],[14],[17],[27]	$ (11)	[6],[29],[30]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.54%	[5],[14],[17]	10.73%	[6],[29]
Reference Rate and Spread		6%	[5],[14],[17]	6%	[6],[29]
Principal		$ 7,973	[5],[14],[17]	$ 7,993	[6],[29]
Cost		7,903	[5],[14],[17]	7,914	[6],[29]
Fair value		$ 7,973	[5],[14],[17]	$ 7,914	[6],[29]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.54%	[5],[14],[17]	10.48%	[6],[29]
Reference Rate and Spread		6%	[5],[14],[17]	5.75%	[6],[29]
Principal		$ 6,133	[5],[14],[17]	$ 6,133	[6],[29]
Cost		6,086	[5],[14],[17]	6,079	[6],[29]
Fair value		$ 6,133	[5],[14],[17]	$ 6,133	[6],[29]
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		13,309		13,309
Cost		$ 6,122		$ 6,122
Fair value		$ 10,400		$ 8,700		$ 6,890		5,840
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						12%
Reference Rate and Spread						10%
Fair value						$ 14,941		8,864
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		9%	[14],[27]	9%	[29],[30]
Principal		$ 0	[14],[27]	$ 0	[29],[30]
Cost		0	[14],[27]	0	[29],[30]
Fair value		$ 0	[14],[27]	$ 0	[29],[30]
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.25%	[14]	13.13%	[29]
Reference Rate and Spread		9%	[14]	9%	[29]
Principal		$ 15,030	[14]	$ 15,030	[29]
Cost		14,966	[14]	14,954	[29]
Fair value		$ 15,030	[14]	$ 14,954	[29]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		4,347	[32]	4,347	[31]
Cost		$ 11,440	[32]	$ 11,440	[31]
Fair value		$ 23,940	[32]	$ 22,920	[31]	22,510		24,140
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		1,047,146	[32],[39]	1,047,146	[31],[40]
Cost		$ 1,773	[32],[39]	$ 1,773	[31],[40]
Fair value		$ 2,830	[32],[39]	$ 2,710	[31],[40]	$ 1,540		1,540
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						9.13%
Reference Rate and Spread						8%
Fair value						$ 17,466		17,817
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[14],[17],[27]	6%	[29],[30]
Principal		$ 0	[14],[17],[27]	$ 0	[29],[30]
Cost		(77)	[14],[17],[27]	0	[29],[30]
Fair value		$ 0	[14],[17],[27]	$ 0	[29],[30]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.36%	[14],[17]	12.13%	[29]
Reference Rate and Spread		8%	[14],[17]	8%	[29]
Principal		$ 16,407	[14],[17]	$ 16,945	[29]
Cost		16,402	[14],[17]	16,935	[29]
Fair value		16,407	[14],[17]	$ 16,945	[29]
Investment, Identifier [Axis]: Chandler Signs Holdings, LLC, Class A Units
Schedule of Investments [Line Items]
Units (in shares)	[6]			1,500,000
Cost	[6]			$ 1,500
Fair value		$ 0		$ 1,790	[6]	620		460
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.51%	[5],[14],[17],[46]	10.72%	[6],[28],[29],[47]
Reference Rate and Spread		6.25%	[5],[14],[17],[46]	6.25%	[6],[28],[29],[47]
Principal		$ 3,940	[5],[14],[17],[46]	$ 1,868	[6],[28],[29],[47]
Cost		3,851	[5],[14],[17],[46]	1,767	[6],[28],[29],[47]
Fair value		$ 3,877	[5],[14],[17],[46]	$ 1,841	[6],[28],[29],[47]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.39%	[5],[14],[17],[46]	10.71%	[6],[28],[29],[48]
Reference Rate and Spread		6.25%	[5],[14],[17],[46]	6.25%	[6],[28],[29],[48]
Principal		$ 38,735	[5],[14],[17],[46]	$ 39,047	[6],[28],[29],[48]
Cost		38,166	[5],[14],[17],[46]	38,396	[6],[28],[29],[48]
Fair value		$ 38,121	[5],[14],[17],[46]	$ 38,484	[6],[28],[29],[48]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	11.39%
Reference Rate and Spread	[5],[14],[17]	6.25%
Principal	[5],[14],[17]	$ 4,914
Cost	[5],[14],[17]	4,796
Fair value	[5],[14],[17]	$ 4,836
Investment, Identifier [Axis]: Charps, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,829	[32]	1,829	[31]
Cost		$ 1,963	[32]	$ 1,963	[31]
Fair value		$ 13,800	[32]	$ 13,340	[31]	$ 13,450		13,990
Investment, Identifier [Axis]: Charps, LLC, Unsecured Debt
Schedule of Investments [Line Items]
Total Rate		10%		10%		10%
Principal		$ 5,694		$ 5,694
Cost		4,661		4,643
Fair value		$ 5,694		$ 5,694		$ 5,694		5,694
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		717	[32]	717	[31]
Cost		$ 7,280	[32]	$ 7,280	[31]
Fair value		$ 6,380	[32]	$ 8,220	[31]	610		530
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		800	[39]	800	[40]
Cost		$ 509	[39]	$ 210	[40]
Fair value		1,129	[39]	$ 610	[40]	$ 10,250		10,250
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate						10.63%
Reference Rate and Spread				9%	[28],[29],[30]	9.50%
Principal		0	[27]	$ 0	[28],[29],[30]
Cost		0	[27]	0	[28],[29],[30]
Fair value		$ 0	[27]	$ 0	[28],[29],[30]	$ 10,421		10,401
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.50%		13.23%	[28],[29]	10%
Reference Rate and Spread	[28],[29]			9%
Principal		$ 9,720		$ 10,480	[28],[29]
Cost		9,698		10,440	[28],[29]
Fair value		$ 9,634		$ 10,440	[28],[29]	$ 1,055		1,071
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10%		10%
Principal		$ 1,031		$ 1,049
Cost		1,022		1,039
Fair value		$ 1,022		$ 1,039
Investment, Identifier [Axis]: Clarius BIGS, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15%	[5],[15],[16]	15%	[6],[33],[38]
PIK Rate		15%	[5],[15],[16]	15%	[6],[33],[38]
Principal		$ 2,696	[5],[15],[16]	$ 2,712	[6],[33],[38]
Cost		2,696	[5],[15],[16]	2,712	[6],[33],[38]
Fair value		$ 22	[5],[15],[16]	$ 19	[6],[33],[38]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		154	[32]	154	[31]
Cost		$ 5,760	[32]	$ 5,760	[31]
Fair value		$ 18,230	[32]	$ 24,637	[31]	$ 23,790		15,260
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.25%	[14]	9.75%	[29]	7%
Reference Rate and Spread		6%	[14]	6%	[29]	6%
Principal		$ 4,560	[14]	$ 4,560	[29]
Cost		4,560	[14]	4,560	[29]
Fair value		$ 4,560	[14]	$ 4,560	[29]	$ 5,560		4,000
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		8%		8%		8%
Principal		$ 19,274		$ 19,274
Cost		19,203		19,182
Fair value		$ 19,274		$ 19,274		$ 19,274		19,274
Investment, Identifier [Axis]: Cody Pools, Inc., Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		587	[32],[39]	587	[31],[40]
Cost		$ 8,317	[32],[39]	$ 8,317	[31],[40]
Fair value		65,120	[32],[39]	$ 58,180	[31],[40]	$ 51,190		47,640
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate						12.25%
Reference Rate and Spread						10.50%
Fair value						$ 41,637		42,484
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[29]			15.38%
Reference Rate and Spread	[29]			10.50%
Principal		0	[27]	$ 1,462	[29]
Cost		(12)	[27]	1,443	[29]
Fair value		0	[27]	1,462	[29]
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 1.1
Schedule of Investments [Line Items]
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%		15.38%	[29]
Reference Rate and Spread	[29]			10.50%
Principal		$ 46,312		$ 40,801	[29]
Cost		46,273		40,521	[29]
Fair value		46,312		40,801	[29]
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 2.1
Schedule of Investments [Line Items]
Fair value		$ 46,312		0
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Reference Rate and Spread		10.50%
Fair value		$ 0		1,462
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 4
Schedule of Investments [Line Items]
Reference Rate and Spread		10.50%
Fair value		$ 0		$ 40,801
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)	[31]			17,280
Cost	[31]			$ 7,680
Fair value				9,160	[31]	$ 8,940		9,130
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Fair value		$ 2,400		0
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		960
Cost		$ 960
Fair value		2,400
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units 2.1
Schedule of Investments [Line Items]
Fair value		$ 7,680		9,160
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units 3
Schedule of Investments [Line Items]
Units (in shares)		17,280
Cost		$ 7,680
Fair value		7,680
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						12%
Fair value						$ 25,351		24,351
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[27]	0	[30]
Cost		0	[27]	0	[30]
Fair value		$ 0	[27]	$ 0	[30]
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 22,680		$ 23,310
Cost		22,549		23,151
Fair value		$ 22,049		$ 23,151
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,975	[32]	1,975	[31]
Cost		$ 1,975	[32]	$ 1,975	[31]
Fair value		$ 16,380	[32]	$ 19,830	[31]	$ 17,230		12,000
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.25%	[14]			10.13%
Reference Rate and Spread		9%	[14]			9%
Principal	[14]	$ 4,869
Cost	[14]	4,864
Fair value		$ 4,869	[14]			$ 5,741		6,477
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		9%		9%	[29],[30],[38]
Principal	[29],[30],[38]			$ 0
Cost	[29],[30],[38]			0
Fair value		$ 0		$ 0	[29],[30],[38]
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.25%		13.13%	[29]
Reference Rate and Spread		9%		9%	[29]
Principal	[29]			$ 5,241
Cost	[29]			5,232
Fair value		$ 4,869		$ 5,241	[29]
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.71%	[5],[14],[49]	12.56%	[6],[29],[50]
Reference Rate and Spread		7.50%	[5],[14],[49]	8%	[6],[29],[50]
Principal		$ 5,000	[5],[14],[49]	$ 5,000	[6],[29],[50]
Cost		4,938	[5],[14],[49]	4,928	[6],[29],[50]
Fair value		$ 4,682	[5],[14],[49]	$ 4,621	[6],[29],[50]
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.82%	[5],[14]	12.56%	[6],[29]
Reference Rate and Spread		7.50%	[5],[14]	8%	[6],[29]
Principal		$ 18,450	[5],[14]	$ 18,588	[6],[29]
Cost		18,217	[5],[14]	18,315	[6],[29]
Fair value		$ 17,277	[5],[14]	$ 17,178	[6],[29]
Investment, Identifier [Axis]: Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP)
Schedule of Investments [Line Items]
Units (percentage)		13.32%	[7],[8],[32],[43]	13.32%	[9],[10],[31],[44]
Cost		$ 6,224	[7],[8],[32],[43]	$ 8,096	[9],[10],[31],[44]
Fair value		5,562	[7],[8],[32],[43]	7,657	[9],[10],[31],[44]
Investment, Identifier [Axis]: Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP)
Schedule of Investments [Line Items]
Fair value		$ 5,562		$ 7,657		8,299		9,959
Investment, Identifier [Axis]: Construction Supply Investments, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		861,618	[5]	861,618	[6],[31]
Cost		$ 3,335	[5]	$ 3,335	[6],[31]
Fair value		$ 24,435	[5]	$ 21,165	[6],[31]
Investment, Identifier [Axis]: Copper Trail Fund Investments, LP Interests (CTMH, LP)
Schedule of Investments [Line Items]
Units (percentage)		38.75%	[7],[8],[43]	38.75%	[9],[10],[44]
Cost		$ 588	[7],[8],[43]	$ 588	[9],[10],[44]
Fair value		$ 588	[7],[8],[43]	588	[9],[10],[44]	710		710
Investment, Identifier [Axis]: Cybermedia Technologies, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		556
Cost		$ 15,000
Fair value		15,000		0
Investment, Identifier [Axis]: Cybermedia Technologies, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal	[27]	0
Cost	[27]	0
Fair value		$ 0	[27]	0
Investment, Identifier [Axis]: Cybermedia Technologies, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%
Principal		$ 29,000
Cost		28,720
Fair value		$ 28,720		$ 0
Investment, Identifier [Axis]: DMA Industries, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		5,944		5,944
Cost		$ 5,944		$ 5,944
Fair value		$ 7,260		$ 7,260		$ 6,920		5,944
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%
Principal		$ 20,000		$ 21,200
Cost		19,856		21,035
Fair value		$ 20,000		$ 21,200		$ 21,200		20,993
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class A Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		776,316	[5]	776,316	[6]
Total Rate		8%	[5]	8%	[6]
PIK Rate		8%	[5]	8%	[6]
Cost		$ 776	[5]	$ 776	[6]
Fair value		$ 260	[5]	$ 380	[6]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class AA Preferred Member Units (non-voting)
Schedule of Investments [Line Items]
Total Rate		10%	[5],[32]	10%	[6],[31]
PIK Rate		10%	[5],[32]	10%	[6],[31]
Cost		$ 1,220	[5],[32]	$ 1,161	[6],[31]
Fair value		$ 1,220	[5],[32]	$ 1,161	[6],[31]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread	[6],[29],[30]			7.50%
Principal	[6],[29],[30]			$ 0
Cost	[6],[29],[30]			(1)
Fair value	[6],[29],[30]			$ (1)
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[6],[29]			12.24%
Reference Rate and Spread	[6],[29]			7.50%
Principal	[6],[29]			$ 6,074
Cost	[6],[29]			6,065
Fair value	[6],[29]			$ 5,934
Investment, Identifier [Axis]: Dalton US Inc., Common Stock
Schedule of Investments [Line Items]
Units (in shares)		201	[5]	201	[6]
Cost		$ 201	[5]	$ 201	[6]
Fair value		$ 201	[5]	$ 201	[6]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.69%	[5],[14],[17],[51]	11.90%	[6],[28],[29]
Reference Rate and Spread		8.50%	[5],[14],[17],[51]	8%	[6],[28],[29]
Principal		$ 3,614	[5],[14],[17],[51]	$ 1,092	[6],[28],[29]
Cost		3,417	[5],[14],[17],[51]	871	[6],[28],[29]
Fair value		$ 3,614	[5],[14],[17],[51]	$ 1,077	[6],[28],[29]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 2
Schedule of Investments [Line Items]
Reference Rate and Spread		8.50%	[5],[14],[17],[27]	8%	[6],[28],[29],[30]
Principal		$ 0	[5],[14],[17],[27]	$ 0	[6],[28],[29],[30]
Cost		(66)	[5],[14],[17],[27]	(74)	[6],[28],[29],[30]
Fair value		$ (66)	[5],[14],[17],[27]	$ (74)	[6],[28],[29],[30]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.69%	[5],[14],[17]	12.56%	[6],[28],[29]
Reference Rate and Spread		8.50%	[5],[14],[17]	8%	[6],[28],[29]
Principal		$ 14,270	[5],[14],[17]	$ 14,389	[6],[28],[29]
Cost		14,035	[5],[14],[17]	14,125	[6],[28],[29]
Fair value		$ 14,270	[5],[14],[17]	$ 14,186	[6],[28],[29]
Investment, Identifier [Axis]: Datacom, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		9,000	[32]	9,000	[31]
Cost		$ 2,610	[32]	$ 2,610	[31]
Fair value		$ 2,350	[32]	$ 2,670	[31]	$ 2,670		2,610
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						7.50%
Fair value						$ 7,617		7,668
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		7.50%		7.50%
Principal		$ 720		$ 223
Cost		716		223
Fair value		$ 716		$ 223
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%		7.50%
Principal		$ 8,487		$ 8,622
Cost		8,132		8,190
Fair value		$ 7,732		$ 7,789
Investment, Identifier [Axis]: Digital Products Holdings LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		3,857	[32]	3,857	[31]
Cost		$ 9,501	[32]	$ 9,501	[31]
Fair value		$ 9,835	[32]	$ 9,835	[31]	$ 9,835		9,835
Investment, Identifier [Axis]: Digital Products Holdings LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.25%	[14],[17]	14.13%	[29]	11.13%
Reference Rate and Spread		10%	[14],[17]	10%	[29]	10%
Principal		$ 14,873	[14],[17]	$ 15,533	[29]
Cost		14,733	[14],[17]	15,523	[29]
Fair value		$ 14,733	[14],[17]	$ 15,523	[29]	$ 16,163		16,801
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		8,400	[32]	8,400	[31]
Cost		$ 8,400	[32]	$ 8,400	[31]
Fair value		23,350	[32]	$ 22,220	[31]	$ 21,550		18,350
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate						12.13%
Reference Rate and Spread						11%
Fair value						$ 24,678		24,048
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread	[29],[30]			11%
Principal		0	[27]	$ 0	[29],[30]
Cost		(74)	[27]	(88)	[29],[30]
Fair value		$ 0	[27]	$ 0	[29],[30]
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%		15.13%	[29]
Reference Rate and Spread	[29]			11%
Principal		$ 26,465		$ 27,267	[29]
Cost		26,355		27,122	[29]
Fair value		$ 26,465		$ 27,267	[29]
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners - A, LP)
Schedule of Investments [Line Items]
Units (percentage)		6.43%	[7],[8],[43]	6.43%	[9],[10],[44]
Cost		$ 2,005	[7],[8],[43]	$ 2,051	[9],[10],[44]
Fair value		$ 2,852	[7],[8],[43]	$ 2,898	[9],[10],[44]	2,734		3,280
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners, LP)
Schedule of Investments [Line Items]
Units (percentage)		20.24%	[7],[8],[43]	20.24%	[9],[10],[44]
Cost		$ 6,313	[7],[8],[43]	$ 6,459	[9],[10],[44]
Fair value		$ 9,138	[7],[8],[43]	$ 9,127	[9],[10],[44]	8,610		10,329
Investment, Identifier [Axis]: Dos Rios Stone Products LLC, Class A Preferred Units
Schedule of Investments [Line Items]
Units (in shares)		2,000,000	[5],[39]	2,000,000	[6],[40]
Cost		$ 2,000	[5],[39]	$ 2,000	[6],[40]
Fair value		$ 1,580	[5],[39]	$ 1,330	[6],[40]	350		640
Investment, Identifier [Axis]: Dynamic Communities, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)		1,250,000	[5]	1,250,000	[6]
Cost		$ 0	[5]	$ 0	[6]
Fair value		$ 0	[5]	$ 0	[6]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Preferred Equity 1
Schedule of Investments [Line Items]
Units (in shares)		125,000	[5]	125,000	[6]
Cost		$ 128	[5]	$ 128	[6]
Fair value		$ 128	[5]	$ 128	[6]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Preferred Equity 2
Schedule of Investments [Line Items]
Units (in shares)		2,376,241	[5]	2,376,241	[6]
Cost		$ 0	[5]	$ 0	[6]
Fair value		0	[5]	$ 0	[6]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[6],[28],[29]			9.18%
Reference Rate and Spread	[6],[28],[29]			4.50%
PIK Rate	[6],[28],[29]			9.18%
Principal		1	[5]	$ 1,875	[6],[28],[29]
Cost		1	[5]	1,717	[6],[28],[29]
Fair value		$ 1	[5]	$ 1,717	[6],[28],[29]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		9.70%	[5],[14],[17]	11.18%	[6],[28],[29]
Reference Rate and Spread		4.50%	[5],[14],[17]	6.50%	[6],[28],[29]
PIK Rate		9.70%	[5],[14],[17]	11.18%	[6],[28],[29]
Principal		$ 1,957	[5],[14],[17]	$ 1,875	[6],[28],[29]
Cost		1,798	[5],[14],[17]	1,642	[6],[28],[29]
Fair value		$ 1,798	[5],[14],[17]	$ 1,642	[6],[28],[29]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	11.70%
Reference Rate and Spread	[5],[14],[17]	6.50%
PIK Rate	[5],[14],[17]	11.70%
Principal	[5],[14],[17]	$ 1,972
Cost	[5],[14],[17]	1,739
Fair value	[5],[14],[17]	$ 1,739
Investment, Identifier [Axis]: EIG Fund Investments, LP Interests (EIG Global Private Debt Fund-A, L.P.)
Schedule of Investments [Line Items]
Units (in shares)		5,000,000	[7],[8],[32],[43]	5,000,000	[9],[10],[31],[44]
Cost		$ 1,021	[7],[8],[32],[43]	$ 1,060	[9],[10],[31],[44]
Fair value		$ 974	[7],[8],[32],[43]	$ 1,013	[9],[10],[31],[44]	389		547
Investment, Identifier [Axis]: EPIC Y-Grade Services, LP, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.36%	[12],[14],[17]	10.70%	[11],[29]
Reference Rate and Spread		6%	[12],[14],[17]	6%	[11],[29]
Principal		$ 6,788	[12],[14],[17]	$ 6,823	[11],[29]
Cost		6,736	[12],[14],[17]	6,764	[11],[29]
Fair value		$ 6,073	[12],[14],[17]	$ 6,141	[11],[29]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.39%	[5],[14],[17]	11.73%	[6],[29]
Reference Rate and Spread		8%	[5],[14],[17]	7%	[6],[29]
Principal		$ 3,346	[5],[14],[17]	$ 3,346	[6],[29]
Cost		3,300	[5],[14],[17]	3,290	[6],[29]
Fair value		$ 3,219	[5],[14],[17]	$ 3,276	[6],[29]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.39%	[5],[14],[17]	11.73%	[6],[29]
Reference Rate and Spread		8%	[5],[14],[17]	7%	[6],[29]
Principal		$ 4,827	[5],[14],[17]	$ 5,021	[6],[29]
Cost		4,784	[5],[14],[17]	4,967	[6],[29]
Fair value		$ 4,644	[5],[14],[17]	$ 4,916	[6],[29]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.39%	[5],[14],[17]	11.73%	[6],[29]
Reference Rate and Spread		8%	[5],[14],[17]	7%	[6],[29]
Principal		$ 22,549	[5],[14],[17]	$ 23,456	[6],[29]
Cost		22,306	[5],[14],[17]	23,149	[6],[29]
Fair value		$ 21,695	[5],[14],[17]	$ 22,967	[6],[29]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 1
Schedule of Investments [Line Items]
Units (in shares)		285		378
Cost		$ 5,726		$ 7,603
Fair value		$ 6,090		$ 7,603
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 2
Schedule of Investments [Line Items]
Units (in shares)		939	[39]	939	[40]
Cost		$ 1,558	[39]	$ 1,558	[40]
Fair value		$ 1,670	[39]	$ 1,558	[40]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[14],[17],[27]	6%	[28],[29],[30]
Principal		$ 0	[14],[17],[27]	$ 0	[28],[29],[30]
Cost		(8)	[14],[17],[27]	(9)	[28],[29],[30]
Fair value		$ (8)	[14],[17],[27]	$ (9)	[28],[29],[30]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 18,773		$ 18,773
Cost		18,613		18,594
Fair value		$ 18,613		$ 18,594
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		9%		9%
Principal		$ 6,335		$ 6,357
Cost		6,274		6,294
Fair value		$ 6,274		$ 6,294
Investment, Identifier [Axis]: Emerald Technologies Acquisition Co, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.66%	[12],[14],[17]	10.67%	[11],[28],[29]
Reference Rate and Spread		6.25%	[12],[14],[17]	6.25%	[11],[28],[29]
Principal		$ 9,141	[12],[14],[17]	$ 9,258	[11],[28],[29]
Cost		8,999	[12],[14],[17]	9,099	[11],[28],[29]
Fair value		$ 8,821	[12],[14],[17]	$ 8,787	[11],[28],[29]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund IX, L.P.)
Schedule of Investments [Line Items]
Units (percentage)	[7],[8],[32],[43]	0.10%
Total Rate	[9],[10],[31],[44]			0.10%
Cost		$ 3,590	[7],[8],[32],[43]	$ 3,699	[9],[10],[31],[44]
Fair value		$ 1,631	[7],[8],[32],[43]	$ 2,019	[9],[10],[31],[44]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII Co-Investors, L.P.)
Schedule of Investments [Line Items]
Units (percentage)	[7],[8],[32],[43]	0.38%
Total Rate	[9],[10],[31],[44]			0.38%
Cost		$ 1,979	[7],[8],[32],[43]	$ 1,984	[9],[10],[31],[44]
Fair value		$ 950	[7],[8],[32],[43]	$ 1,037	[9],[10],[31],[44]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII, L.P.)
Schedule of Investments [Line Items]
Units (percentage)	[7],[8],[32],[43]	0.14%
Total Rate	[9],[10],[31],[44]			0.14%
Cost		$ 3,566	[7],[8],[32],[43]	$ 3,566	[9],[10],[31],[44]
Fair value		$ 1,984	[7],[8],[32],[43]	$ 2,092	[9],[10],[31],[44]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund X, L.P.)
Schedule of Investments [Line Items]
Units (percentage)	[7],[8],[32],[43]	0.15%
Total Rate	[9],[10],[31],[44]			0.15%
Cost		$ 7,160	[7],[8],[32],[43]	$ 8,236	[9],[10],[31],[44]
Fair value		$ 6,862	[7],[8],[32],[43]	$ 9,351	[9],[10],[31],[44]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund II, L.P.)
Schedule of Investments [Line Items]
Units (percentage)	[7],[8],[32],[43]	0.84%
Total Rate	[9],[10],[44]			0.84%
Cost		$ 5,225	[7],[8],[32],[43]	$ 5,358	[9],[10],[44]
Fair value		$ 1,555	[7],[8],[32],[43]	$ 1,688	[9],[10],[44]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund III, L.P.)
Schedule of Investments [Line Items]
Units (percentage)	[7],[8],[32],[43]	0.25%
Total Rate	[9],[10],[31],[44]			0.25%
Cost		$ 5,106	[7],[8],[32],[43]	$ 6,023	[9],[10],[31],[44]
Fair value		$ 5,102	[7],[8],[32],[43]	$ 5,718	[9],[10],[31],[44]
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.75%	[5],[14]	11.68%	[6],[28],[29]
Reference Rate and Spread		5.50%	[5],[14]	6.50%	[6],[28],[29]
Principal		$ 655	[5],[14]	$ 131	[6],[28],[29]
Cost		615	[5],[14]	85	[6],[28],[29]
Fair value		$ 655	[5],[14]	$ 131	[6],[28],[29]
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.76%	[5],[14],[17]	10.92%	[6],[28],[29]
Reference Rate and Spread		6.50%	[5],[14],[17]	6.50%	[6],[28],[29]
Principal		$ 16,216	[5],[14],[17]	$ 16,338	[6],[28],[29]
Cost		15,953	[5],[14],[17]	16,047	[6],[28],[29]
Fair value		$ 16,216	[5],[14],[17]	$ 16,338	[6],[28],[29]
Investment, Identifier [Axis]: Escalent, Inc., Common Equity
Schedule of Investments [Line Items]
Units (in shares)	[5]	649,794
Cost	[5]	$ 663
Fair value	[5]	$ 663
Investment, Identifier [Axis]: Escalent, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread	[5],[17],[27],[29]	8%
Principal	[5],[17],[27],[29]	$ 0
Cost	[5],[17],[27],[29]	(38)
Fair value	[5],[17],[27],[29]	$ (38)
Investment, Identifier [Axis]: Escalent, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[5],[17],[29]	13.34%
Reference Rate and Spread	[5],[17],[29]	8%
Principal	[5],[17],[29]	$ 26,306
Cost	[5],[17],[29]	25,545
Fair value	[5],[17],[29]	$ 25,545
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.54%	[5],[14],[17],[39]	10.67%	[6],[29],[40]
Reference Rate and Spread		7%	[5],[14],[17],[39]	7%	[6],[29],[40]
Principal		$ 3,692	[5],[14],[17],[39]	$ 3,692	[6],[29],[40]
Cost		3,667	[5],[14],[17],[39]	3,663	[6],[29],[40]
Fair value		$ 3,566	[5],[14],[17],[39]	$ 3,507	[6],[29],[40]
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.54%	[5],[14],[17],[39]	10.67%	[6],[29],[40]
Reference Rate and Spread		7%	[5],[14],[17],[39]	7%	[6],[29],[40]
Principal		$ 44,308	[5],[14],[17],[39]	$ 44,308	[6],[29],[40]
Cost		43,999	[5],[14],[17],[39]	43,955	[6],[29],[40]
Fair value		$ 42,797	[5],[14],[17],[39]	$ 42,083	[6],[29],[40]
Investment, Identifier [Axis]: Flame King Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		9,360	[32]	9,360	[31]
Cost		$ 10,400	[32]	$ 10,400	[31]
Fair value		$ 24,350	[32]	$ 17,580	[31]	$ 13,410		10,400
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				10.75%	[29]	7.50%
Reference Rate and Spread		6.50%		6.50%	[29]	6.50%
Principal	[29]			$ 7,600
Cost	[29]			7,537
Fair value		$ 0		$ 7,600	[29]	$ 7,600		6,324
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate				13.25%	[29]	12%
Reference Rate and Spread		9%		9%	[29]	11%
Principal	[29]			$ 21,200
Cost	[29]			21,038
Fair value		$ 0		$ 21,200	[29]	$ 21,200		20,996
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.55%	[5],[17]	11.21%	[6],[28],[29]
Reference Rate and Spread		7.50%	[5],[17]	7.50%	[6],[28],[29]
Principal		$ 982	[5],[17]	$ 736	[6],[28],[29]
Cost		982	[5],[17]	736	[6],[28],[29]
Fair value		$ 982	[5],[17]	$ 736	[6],[28],[29]
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.69%	[5],[17]	12.19%	[6],[28],[29]
Reference Rate and Spread		7.50%	[5],[17]	7.50%	[6],[28],[29]
Principal		$ 11,095	[5],[17]	$ 11,095	[6],[28],[29]
Cost		10,892	[5],[17]	10,852	[6],[28],[29]
Fair value		$ 11,095	[5],[17]	$ 11,095	[6],[28],[29]
Investment, Identifier [Axis]: Freeport Financial Funds, LP Interests (Freeport Financial SBIC Fund LP)
Schedule of Investments [Line Items]
Units (percentage)		9.30%	[7],[8],[43]	9.30%	[9],[10],[44]
Cost		$ 3,507	[7],[8],[43]	$ 3,507	[9],[10],[44]
Fair value		$ 3,628	[7],[8],[43]	$ 3,483	[9],[10],[44]
Investment, Identifier [Axis]: Freeport Financial Funds, LP Interests (Freeport First Lien Loan Fund III LP)
Schedule of Investments [Line Items]
Units (percentage)		5.95%	[7],[8],[32],[43]	5.95%	[9],[10],[31],[44]
Cost		$ 5,767	[7],[8],[32],[43]	$ 6,303	[9],[10],[31],[44]
Fair value		5,312	[7],[8],[32],[43]	5,848	[9],[10],[31],[44]
Investment, Identifier [Axis]: Freeport Financial SBIC Fund LP, LP Interests (Freeport Financial SBIC Fund LP)
Schedule of Investments [Line Items]
Fair value		3,628		3,483		4,116		6,078
Investment, Identifier [Axis]: Freeport Financial SBIC Fund LP, LP Interests (Freeport First Lien Loan Fund III LP)
Schedule of Investments [Line Items]
Fair value		$ 5,312		$ 5,848		6,795		7,231
Investment, Identifier [Axis]: Fuse, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		10,429	[12]	10,429	[11]
Cost		$ 256	[12]	$ 256	[11]
Fair value		$ 0	[12]	$ 0	[11]
Investment, Identifier [Axis]: Fuse, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%	[12]	12%	[11]
Principal		$ 1,810	[12]	$ 1,810	[11]
Cost		1,810	[12]	1,810	[11]
Fair value		$ 1,374	[12]	1,512	[11]
Investment, Identifier [Axis]: GFG Group, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)	[32]	226
Cost	[32]	$ 4,900
Fair value		$ 8,310	[32]	7,140		$ 6,990		6,990
Investment, Identifier [Axis]: GFG Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		9%				9%
Principal		$ 11,345
Cost		11,281
Fair value		$ 11,345		$ 11,345		$ 12,545		12,545
Investment, Identifier [Axis]: GFG Group, LLC., Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)	[31]			226
Cost	[31]			$ 4,900
Fair value	[31]			$ 7,140
Investment, Identifier [Axis]: GFG Group, LLC., Secured Debt
Schedule of Investments [Line Items]
Total Rate				9%
Principal				$ 11,345
Cost				11,269
Fair value				$ 11,345
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		5,879		5,879	[31]
Cost		$ 13,065		$ 13,065	[31]
Fair value		$ 44,440		$ 44,440	[31]	$ 46,190		46,190
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						9.06%
Reference Rate and Spread						8%
Fair value						$ 38,885		38,885
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.17%		10.12%
Reference Rate and Spread		6%		6%
Principal		$ 1,300		$ 670
Cost		1,300		670
Fair value		$ 1,300		$ 670
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.17%		12.12%
Reference Rate and Spread		8%		8%
Principal		$ 40,493		$ 40,493
Cost		40,336		40,313
Fair value		$ 40,493		$ 40,493
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[6],[29]			11.20%
Reference Rate and Spread		6.50%	[5],[14],[17],[27]	6.50%	[6],[29]
Principal		$ 0	[5],[14],[17],[27]	$ 2,177	[6],[29]
Cost		(6)	[5],[14],[17],[27]	2,169	[6],[29]
Fair value		(6)	[5],[14],[17],[27]	$ 2,171	[6],[29]
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[6],[29]			11.24%
Reference Rate and Spread	[6],[29]			6.50%
Principal		0	[5],[27]	$ 10,734	[6],[29]
Cost		(14)	[5],[27]	10,695	[6],[29]
Fair value		$ (14)	[5],[27]	$ 10,705	[6],[29]
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	11.70%
Reference Rate and Spread	[5],[14],[17]	6.50%
Principal	[5],[14],[17]	$ 10,679
Cost	[5],[14],[17]	10,651
Fair value	[5],[14],[17]	$ 10,679
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.14%	[5],[14],[17],[52]	10.42%	[6],[28],[29]
Reference Rate and Spread		5.75%	[5],[14],[17],[52]	6%	[6],[28],[29]
Principal		$ 303	[5],[14],[17],[52]	$ 252	[6],[28],[29]
Cost		285	[5],[14],[17],[52]	233	[6],[28],[29]
Fair value		$ 303	[5],[14],[17],[52]	$ 252	[6],[28],[29]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	11.14%
Reference Rate and Spread		5.75%	[5],[14],[17]	6%	[6],[28],[29],[30]
Principal		$ 303	[5],[14],[17]	$ 0	[6],[28],[29],[30]
Cost		287	[5],[14],[17]	(15)	[6],[28],[29],[30]
Fair value		$ 303	[5],[14],[17]	$ (15)	[6],[28],[29],[30]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.14%	[5],[14],[17]	10.73%	[6],[28],[29]
Reference Rate and Spread		5.75%	[5],[14],[17]	6%	[6],[28],[29]
Principal		$ 3,642	[5],[14],[17]	$ 3,661	[6],[28],[29]
Cost		3,579	[5],[14],[17]	3,591	[6],[28],[29]
Fair value		$ 3,642	[5],[14],[17]	$ 3,661	[6],[28],[29]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		9,042	[32]	9,042	[31]
Cost		$ 17,692	[32]	$ 17,692	[31]
Fair value		$ 70,160	[32]	$ 50,890	[31]	$ 46,300		49,700
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						10.50%
Reference Rate and Spread						8%
Fair value						$ 21,598		21,598
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		8.50%	[14],[17],[27],[35]	8.50%	[28],[29],[30]
Principal		$ 0	[14],[17],[27],[35]	$ 0	[28],[29],[30]
Cost		0	[14],[17],[27],[35]	0	[28],[29],[30]
Fair value		$ 0	[14],[17],[27],[35]	$ 0	[28],[29],[30]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11%	[14],[17],[35]	11.50%	[28],[29]
Reference Rate and Spread		8%	[14],[17],[35]	8.50%	[28],[29]
Principal		$ 59,678	[14],[17],[35]	$ 64,078	[28],[29]
Cost		59,349	[14],[17],[35]	63,685	[28],[29]
Fair value		$ 59,678	[14],[17],[35]	$ 64,078	[28],[29]
Investment, Identifier [Axis]: Garreco, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,200		1,200	[31]
Cost		$ 1,200		$ 1,200	[31]
Fair value		$ 1,580		$ 1,800	[31]	$ 2,490		2,270
Investment, Identifier [Axis]: Garreco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%	[14],[53]	9.50%	[29],[54]	9%
Reference Rate and Spread		10%	[14],[53]	8%	[29],[54]	8%
Principal		$ 3,272	[14],[53]	$ 3,826	[29],[54]
Cost		3,272	[14],[53]	3,826	[29],[54]
Fair value		$ 3,272	[14],[53]	$ 3,826	[29],[54]	$ 4,196		4,196
Investment, Identifier [Axis]: GeoStabilization International (GSI), Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.17%	[12],[17]	9.44%	[11],[28]
Reference Rate and Spread		5.25%	[12],[17]	5.25%	[11],[28]
Principal		$ 20,444	[12],[17]	$ 20,497	[11],[28]
Cost		20,385	[12],[17]	20,427	[11],[28]
Fair value		$ 19,831	[12],[17]	$ 19,472	[11],[28]
Investment, Identifier [Axis]: Gulf Manufacturing, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		438	[32]	438	[31]
Cost		$ 2,980	[32]	$ 2,980	[31]
Fair value		$ 8,000	[32]	$ 6,790	[31]	$ 5,510		5,640
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		3,681		3,681
Cost		$ 3,681		$ 3,681
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		63,720		63,720
Cost		$ 5,600		$ 5,600
Fair value		$ 3,780		$ 3,780
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate						10.60%
Reference Rate and Spread		9.50%	[14],[27]	9.50%	[29],[30]
PIK Rate						5.25%
Principal		$ 0	[14],[27]	$ 0	[29],[30]
Cost		0	[14],[27]	0	[29],[30]
Fair value		$ 0	[14],[27]	$ 0	[29],[30]	$ 257		257
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%		12.50%		12.50%
PIK Rate						6.25%
Principal		$ 2,400		$ 2,400
Cost		2,400		2,400
Fair value		$ 2,284		$ 2,284		$ 7,529		9,717
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		14.34%	[5],[14],[17]	14.34%	[6],[28],[29]
Reference Rate and Spread		9.50%	[5],[14],[17]	9.50%	[6],[28],[29]
PIK Rate		14.34%	[5],[14],[17]	2%	[6],[28],[29]
Principal		$ 344	[5],[14],[17]	$ 320	[6],[28],[29]
Cost		343	[5],[14],[17]	319	[6],[28],[29]
Fair value		$ 315	[5],[14],[17]	$ 311	[6],[28],[29]
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.34%	[5],[14],[17]	14.34%	[6],[28],[29]
Reference Rate and Spread		9.50%	[5],[14],[17]	9.50%	[6],[28],[29]
PIK Rate		14.34%	[5],[14],[17]	2%	[6],[28],[29]
Principal		$ 3,487	[5],[14],[17]	$ 3,277	[6],[28],[29]
Cost		3,480	[5],[14],[17]	3,262	[6],[28],[29]
Fair value		$ 3,188	[5],[14],[17]	$ 3,186	[6],[28],[29]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6.50%	[5],[14],[17],[27]	6.50%	[6],[28],[29],[30]
Principal		$ 0	[5],[14],[17],[27]	$ 0	[6],[28],[29],[30]
Cost		(55)	[5],[14],[17],[27]	(62)	[6],[28],[29],[30]
Fair value		$ (55)	[5],[14],[17],[27]	$ (62)	[6],[28],[29],[30]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 2
Schedule of Investments [Line Items]
Reference Rate and Spread		6.50%	[5],[14],[17],[27]	6.50%	[6],[28],[29],[30]
Principal		$ 0	[5],[14],[17],[27]	$ 0	[6],[28],[29],[30]
Cost		(55)	[5],[14],[17],[27]	(62)	[6],[28],[29],[30]
Fair value		$ (55)	[5],[14],[17],[27]	$ (62)	[6],[28],[29],[30]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.60%	[5],[14],[17]	10.62%	[6],[28],[29]
Reference Rate and Spread		6.50%	[5],[14],[17]	6.50%	[6],[28],[29]
Principal		$ 16,706	[5],[14],[17]	$ 16,791	[6],[28],[29]
Cost		16,433	[5],[14],[17]	16,483	[6],[28],[29]
Fair value		$ 16,706	[5],[14],[17]	$ 16,791	[6],[28],[29]
Investment, Identifier [Axis]: HOWLCO LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.32%	[8],[12],[13],[14],[17]	10.69%	[10],[11],[18],[29]
Reference Rate and Spread		6%	[8],[12],[13],[14],[17]	6%	[10],[11],[18],[29]
Principal		$ 25,162	[8],[12],[13],[14],[17]	$ 25,290	[10],[11],[18],[29]
Cost		25,162	[8],[12],[13],[14],[17]	25,290	[10],[11],[18],[29]
Fair value		24,464	[8],[12],[13],[14],[17]	24,381	[10],[11],[18],[29]
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (423 COR, LP)
Schedule of Investments [Line Items]
Fair value		1,400		1,400		1,400		0
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (HPEP 3, L.P.)
Schedule of Investments [Line Items]
Fair value		4,106		4,331		4,331		4,712
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (HPEP 4, L.P.)
Schedule of Investments [Line Items]
Fair value		$ 2,796		$ 2,332
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (2717 HPP-MS, L.P.)
Schedule of Investments [Line Items]
Units (percentage)		49.26%	[7],[8],[43]	49.26%	[9],[10],[44]
Cost		$ 248	[7],[8],[43]	$ 248	[9],[10],[44]
Fair value		$ 315	[7],[8],[43]	$ 248	[9],[10],[44]
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (2717 MH, L.P.)
Schedule of Investments [Line Items]
Units (percentage)		49.26%	[7],[8],[32],[43]	49.26%	[9],[10],[44]
Cost		$ 3,364	[7],[8],[32],[43]	$ 3,895	[9],[10],[44]
Fair value		$ 6,346	[7],[8],[32],[43]	$ 7,552	[9],[10],[44]
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (423 COR, L.P.)
Schedule of Investments [Line Items]
Units (percentage)	[7],[8],[32],[43]	22.93%
Cost	[7],[8],[32],[43]	$ 1,400
Fair value	[7],[8],[32],[43]	$ 1,400
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (423 COR, LP)
Schedule of Investments [Line Items]
Units (percentage)	[9],[10],[44]			22.93%
Cost	[9],[10],[44]			$ 1,400
Fair value	[9],[10],[44]			$ 1,400
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (423 HAR, L.P.)
Schedule of Investments [Line Items]
Units (percentage)	[7],[8],[43]	15.60%
Cost	[7],[8],[43]	$ 750
Fair value	[7],[8],[43]	$ 750
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (HPEP 3, L.P.)
Schedule of Investments [Line Items]
Units (percentage)		8.22%	[7],[8],[32],[43]	8.22%	[9],[10],[44]
Cost		$ 2,050	[7],[8],[32],[43]	$ 2,558	[9],[10],[44]
Fair value		$ 4,106	[7],[8],[32],[43]	$ 4,331	[9],[10],[44]
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (HPEP 4, L.P.)
Schedule of Investments [Line Items]
Units (percentage)		8.71%	[7],[8],[43]	8.71%	[9],[10],[44]
Cost		$ 2,796	[7],[8],[43]	$ 2,332	[9],[10],[44]
Fair value		$ 2,796	[7],[8],[43]	$ 2,332	[9],[10],[44]
Investment, Identifier [Axis]: Harrison Hydra-Gen, Ltd., Common Stock
Schedule of Investments [Line Items]
Units (in shares)		107,456		107,456
Cost		$ 718		$ 718
Fair value		$ 3,490		$ 3,280		3,330		3,530
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		226	[32]	226	[31]
Cost		$ 2,850	[32]	$ 2,850	[31]
Fair value		$ 17,460	[32]	$ 17,460	[31]	20,030		14,680
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		226	[39]	226	[40]
Cost		$ 150	[39]	$ 150	[40]
Fair value		$ 920	[39]	$ 920	[40]	$ 1,050		771
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.53%	[14],[17]	10.13%	[29]	7.13%
Reference Rate and Spread		6%	[14],[17]	6%	[29]	6%
Principal		$ 3,666	[14],[17]	$ 3,185	[29]
Cost		3,664	[14],[17]	3,183	[29]
Fair value		$ 3,666	[14],[17]	$ 3,185	[29]	$ 2,585		2,585
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%		9%		8%
Principal		$ 41,942		$ 37,800
Cost		41,823		37,685
Fair value		$ 41,942		$ 37,800		$ 34,800		34,800
Investment, Identifier [Axis]: Heartland Dental, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[6],[29]			10.88%
Reference Rate and Spread	[6],[29]			6.50%
Principal	[6],[29]			$ 14,663
Cost	[6],[29]			14,430
Fair value	[6],[29]			$ 13,599
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		322,297		322,297
Cost		$ 2,352		$ 2,352
Fair value		$ 3,560		$ 2,400		$ 2,520		3,210
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Unsecured Convertible Debt
Schedule of Investments [Line Items]
Total Rate		8%		8%		8%
Principal		$ 3,000		$ 3,000
Cost		3,000		3,000
Fair value		$ 2,830		$ 3,000		$ 2,750		2,960
Investment, Identifier [Axis]: Hybrid Promotions, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.76%	[5],[14],[17]	12.07%	[6],[28]
Reference Rate and Spread		10.25%	[5],[14],[17]	8.25%	[6],[28]
PIK Rate	[5],[14],[17]	2%
Principal		$ 7,088	[5],[14],[17]	$ 7,088	[6],[28]
Cost		7,001	[5],[14],[17]	6,986	[6],[28]
Fair value		$ 5,716	[5],[14],[17]	$ 6,144	[6],[28]
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 21.75% profits interest)
Schedule of Investments [Line Items]
Units (percentage)	[7],[8],[32]	20%
Total Rate	[9],[10],[31]			20%
Cost		$ 20,200	[7],[8],[32]	$ 19,000	[9],[10],[31]
Fair value		$ 11,751	[7],[8],[32]	$ 11,758	[9],[10],[31]
Diluted, percentage		20%	[7],[8]	20%	[9],[10]
Profits, percentage		21.75%	[7],[8]	21.75%	[9],[10]
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 21.75% profits interest)
Schedule of Investments [Line Items]
Fair value		$ 11,751		$ 11,758		$ 12,949		14,387
Diluted, percentage		20%				20%
Profits, percentage		21.75%				21.75%
Investment, Identifier [Axis]: IG Investor, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)		15,096
Cost		$ 15,096
Fair value		15,096		0
Investment, Identifier [Axis]: IG Investor, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal	[27]	0
Cost	[27]	(39)
Fair value		$ (39)	[27]	0
Investment, Identifier [Axis]: IG Investor, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%
Principal		$ 37,704
Cost		37,333
Fair value		$ 37,333		$ 0
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[28],[29],[55]			10.17%
Reference Rate and Spread		5.75%	[12],[14],[17],[27]	5.75%	[11],[28],[29],[55]
Principal		$ 0	[12],[14],[17],[27]	$ 698	[11],[28],[29],[55]
Cost		(24)	[12],[14],[17],[27]	670	[11],[28],[29],[55]
Fair value		$ 0	[12],[14],[17],[27]	$ 698	[11],[28],[29],[55]
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.95%	[12],[14],[17]	10.17%	[11],[28],[29]
Reference Rate and Spread		5.75%	[12],[14],[17]	5.75%	[11],[28],[29]
Principal		$ 14,426	[12],[14],[17]	$ 14,499	[11],[28],[29]
Cost		14,249	[12],[14],[17]	14,304	[11],[28],[29]
Fair value		$ 14,426	[12],[14],[17]	$ 14,499	[11],[28],[29]
Investment, Identifier [Axis]: INW Manufacturing, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.29%	[12],[14],[17]	10.48%	[11],[29]
Reference Rate and Spread		5.75%	[12],[14],[17]	5.75%	[11],[29]
Principal		$ 6,938	[12],[14],[17]	$ 7,125	[11],[29]
Cost		6,803	[12],[14],[17]	6,968	[11],[29]
Fair value		$ 5,504	[12],[14],[17]	6,092	[11],[29]
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread	[17],[27]	9%
PIK Rate	[17],[27]	2%
Principal	[17],[27]	$ 0
Cost	[17],[27]	(12)
Fair value		$ (12)	[17],[27]	0
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Reference Rate and Spread	[17],[27]	9%
PIK Rate	[17],[27]	2%
Principal	[17],[27]	$ 0
Cost	[17],[27]	(10)
Fair value		$ (10)	[17],[27]	0
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[17]	15.38%
Reference Rate and Spread	[17]	8%
PIK Rate	[17]	2%
Principal	[17]	$ 4,318
Cost	[17]	3,252
Fair value		$ 3,252	[17]	0
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[17]	17.38%
Reference Rate and Spread	[17]	10%
PIK Rate	[17]	2%
Principal	[17]	$ 4,318
Cost	[17]	3,252
Fair value		$ 3,252	[17]	0
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Warrants
Schedule of Investments [Line Items]
Units (in shares)	[25]	193,307
Cost	[25]	$ 2,091
Fair value		$ 2,091	[25]	$ 0
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C., Common Equity
Schedule of Investments [Line Items]
Units (in shares)	[5]	849
Cost	[5]	$ 1,166
Fair value	[5]	$ 1,166
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	12.24%
Reference Rate and Spread	[5],[14],[17]	7%
Principal	[5],[14],[17]	$ 20,872
Cost	[5],[14],[17]	20,167
Fair value	[5],[14],[17]	$ 20,167
Investment, Identifier [Axis]: Implus Footcare, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.65%	[5],[14],[17]	13.98%	[6],[29]
Reference Rate and Spread		7.75%	[5],[14],[17]	7.75%	[6],[29]
PIK Rate		1.50%	[5],[14],[17]	1.50%	[6],[29]
Principal		$ 18,592	[5],[14],[17]	$ 18,515	[6],[29]
Cost		18,506	[5],[14],[17]	18,384	[6],[29]
Fair value		$ 16,591	[5],[14],[17]	17,464	[6],[29]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)	[5]	18,006,407
Cost	[5]	$ 18,300
Fair value		$ 18,300	[5]	$ 0
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)	[6]			1,558,333
Cost	[6]			$ 1,558
Fair value	[6]			$ 0
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Preferred Stock (non-voting) 1
Schedule of Investments [Line Items]
Total Rate	[6]			6%
PIK Rate	[6]			6%
Cost	[6]			$ 3,235
Fair value	[6]			0
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Preferred Stock (non-voting) 2
Schedule of Investments [Line Items]
Cost	[6]			0
Fair value	[6]			$ 0
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[6],[29],[56]			13%
Reference Rate and Spread	[6],[29],[56]			5.50%
PIK Rate	[6],[29],[56]			13%
Principal	[6],[29],[56]			$ 7,027
Cost	[6],[29],[56]			7,027
Fair value	[6],[29],[56]			$ 7,027
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[6],[33]			6%
PIK Rate	[6],[33]			6%
Principal	[6],[33]			$ 18,428
Cost	[6],[33]			17,664
Fair value	[6],[33]			$ 7,633
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[6],[28]			14.42%
Reference Rate and Spread	[6],[28]			10%
PIK Rate	[6],[28]			14.42%
Principal	[6],[28]			$ 806
Cost	[6],[28]			769
Fair value	[6],[28]			$ 769
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Warrants
Schedule of Investments [Line Items]
Units (in shares)	[6],[30],[57]			242,914
Cost	[6],[30],[57]			$ 0
Fair value	[6],[30],[57]			$ 0
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		900	[5],[39]	900	[6],[40]
Cost		$ 900	[5],[39]	$ 900	[6],[40]
Fair value		$ 600	[5],[39]	$ 600	[6],[40]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		144	[5],[32],[39]	144	[6],[31],[40]
Total Rate		10%	[5],[32],[39]	10%	[6],[31],[40]
PIK Rate		10%	[5],[32],[39]	10%	[6],[31],[40]
Cost		$ 133	[5],[32],[39]	$ 129	[6],[31],[40]
Fair value		$ 149	[5],[32],[39]	$ 145	[6],[31],[40]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		80	[5],[32],[39]	80	[6],[31],[40]
Total Rate		20%	[5],[32],[39]	20%	[6],[31],[40]
PIK Rate		20%	[5],[32],[39]	20%	[6],[31],[40]
Cost		$ 97	[5],[32],[39]	$ 92	[6],[31],[40]
Fair value		$ 98	[5],[32],[39]	$ 93	[6],[31],[40]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.25%	[5],[14],[17]	11.50%	[6],[29]
Reference Rate and Spread		6.75%	[5],[14],[17]	6.75%	[6],[29]
Principal		$ 1,004	[5],[14],[17]	$ 463	[6],[29]
Cost		976	[5],[14],[17]	430	[6],[29]
Fair value		$ 1,004	[5],[14],[17]	$ 463	[6],[29]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.25%	[5],[14],[17]	11.50%	[6],[29]
Reference Rate and Spread		6.75%	[5],[14],[17]	6.75%	[6],[29]
Principal		$ 19,142	[5],[14],[17]	$ 19,239	[6],[29]
Cost		18,900	[5],[14],[17]	18,956	[6],[29]
Fair value		$ 19,142	[5],[14],[17]	19,239	[6],[29]
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		80,000
Cost		$ 4,000
Fair value		$ 4,000		0
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13%
Principal		$ 18,000
Cost		17,832
Fair value		$ 17,832		$ 0
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	10.70%
Reference Rate and Spread		5.50%	[5],[14],[17]	5.50%	[6],[29],[30]
Principal		$ 1,512	[5],[14],[17]	$ 0	[6],[29],[30]
Cost		1,481	[5],[14],[17]	(19)	[6],[29],[30]
Fair value		$ 1,481	[5],[14],[17]	$ (19)	[6],[29],[30]
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.70%	[5],[14],[17]	10.23%	[6],[29]
Reference Rate and Spread		5.50%	[5],[14],[17]	5.50%	[6],[29]
Principal		$ 8,550	[5],[14],[17]	$ 8,593	[6],[29]
Cost		8,435	[5],[14],[17]	8,461	[6],[29]
Fair value		$ 8,550	[5],[14],[17]	8,593	[6],[29]
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)	[5]	106,032
Cost	[5]	$ 336
Fair value	[5]	$ 336
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	13.14%
Reference Rate and Spread	[5],[14],[17]	8%
Principal	[5],[14],[17]	$ 286
Cost	[5],[14],[17]	264
Fair value	[5],[14],[17]	$ 264
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	13.07%
Reference Rate and Spread	[5],[14],[17]	8%
Principal	[5],[14],[17]	$ 10,273
Cost	[5],[14],[17]	10,023
Fair value	[5],[14],[17]	$ 10,023
Investment, Identifier [Axis]: Integral Energy Services, Common Stock
Schedule of Investments [Line Items]
Units (in shares)	[5]	9,968
Cost	[5]	$ 1,356
Fair value		$ 820	[5]	1,280
Investment, Identifier [Axis]: Integral Energy Services, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[5],[14]	13.04%
Reference Rate and Spread	[5],[14]	7.50%
Principal	[5],[14]	$ 15,769
Cost	[5],[14]	15,560
Fair value		$ 15,575	[5],[14]	$ 15,769
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		2,143	[5]	2,143	[6]
Cost		$ 0	[5]	$ 0	[6]
Fair value		$ 0	[5]	$ 0	[6]
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.34%	[5],[17]	14.22%	[6],[58]
Reference Rate and Spread		10%	[5],[17]	10%	[6],[58]
PIK Rate	[5],[17]	15.34%
Principal		$ 1,835	[5],[17]	$ 1,682	[6],[58]
Cost		1,835	[5],[17]	1,682	[6],[58]
Fair value		$ 1,781	[5],[17]	$ 1,682	[6],[58]
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.23%	[5],[14],[16],[17]	12.07%	[6],[29],[33]
Reference Rate and Spread		7%	[5],[14],[16],[17]	7%	[6],[29],[33]
PIK Rate		12.23%	[5],[14],[16],[17]	1%	[6],[29],[33]
Principal		$ 7,313	[5],[14],[16],[17]	$ 7,313	[6],[29],[33]
Cost		7,237	[5],[14],[16],[17]	7,237	[6],[29],[33]
Fair value		$ 823	[5],[14],[16],[17]	$ 1,082	[6],[29],[33]
Investment, Identifier [Axis]: Intermedia Holdings, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.19%	[12],[14],[17]	10.38%	[11],[29]
Reference Rate and Spread		6%	[12],[14],[17]	6%	[11],[29]
Principal		$ 20,361	[12],[14],[17]	$ 20,467	[11],[29]
Cost		20,322	[12],[14],[17]	20,418	[11],[29]
Fair value		$ 16,594	[12],[14],[17]	$ 15,811	[11],[29]
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.04%	[5],[14]	10.14%	[6],[29]
Reference Rate and Spread		6.50%	[5],[14]	6.50%	[6],[29]
Principal		$ 622	[5],[14]	$ 622	[6],[29]
Cost		618	[5],[14]	618	[6],[29]
Fair value		$ 605	[5],[14]	$ 622	[6],[29]
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.04%	[5],[14]	10.17%	[6],[29]
Reference Rate and Spread		6.50%	[5],[14]	6.50%	[6],[29]
Principal		$ 16,889	[5],[14]	$ 16,889	[6],[29]
Cost		16,804	[5],[14]	16,784	[6],[29]
Fair value		$ 16,429	[5],[14]	$ 16,889	[6],[29]
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		203,016		179,778
Cost		$ 2,756		$ 1,798
Fair value		$ 2,756		$ 1,798		$ 1,798		1,798
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.50%		12.50%		12.50%
Principal		$ 4,514		$ 4,534
Cost		4,484		4,500
Fair value		$ 4,484		$ 4,500		$ 3,173		3,170
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.50%		12.50%		12.50%
Principal		$ 3,140		$ 3,154
Cost		3,119		3,130
Fair value		$ 3,119		$ 3,130		$ 4,561		4,557
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.50%		12.50%		12.50%
Principal		$ 8,944		$ 8,944
Cost		8,944		8,944
Fair value		$ 8,944		$ 8,944		$ 28,769		28,749
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		13.50%		12.50%
Principal		$ 19,624		$ 19,712
Cost		19,488		19,559
Fair value		$ 19,488		19,559
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 5
Schedule of Investments [Line Items]
Total Rate		13.50%
Principal		$ 11,162
Cost		10,819
Fair value		$ 10,819		$ 0
Investment, Identifier [Axis]: Isagenix International, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)	[12]	186,322
Cost	[12]	$ 0
Fair value	[12]	$ 0
Investment, Identifier [Axis]: Isagenix International, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.46%	[12],[14],[17]	9.93%	[11],[29],[33]
Reference Rate and Spread		5.50%	[12],[14],[17]	7.75%	[11],[29],[33]
PIK Rate	[12],[14],[17]	3%
Principal		$ 2,305	[12],[14],[17]	$ 5,053	[11],[29],[33]
Cost		2,050	[12],[14],[17]	5,038	[11],[29],[33]
Fair value		$ 2,074	[12],[14],[17]	$ 1,537	[11],[29],[33]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)		1,684,211	[5]	1,684,211	[6]
Cost		$ 1,684	[5]	$ 1,684	[6]
Fair value		$ 2,660	[5]	$ 2,840	[6]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[5],[14],[27]	6%	[6],[29],[30]
Principal		$ 0	[5],[14],[27]	$ 0	[6],[29],[30]
Cost		(118)	[5],[14],[27]	(135)	[6],[29],[30]
Fair value		$ (118)	[5],[14],[27]	$ (135)	[6],[29],[30]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.54%	[5],[14]	10.73%	[6],[29]
Reference Rate and Spread		6%	[5],[14]	6%	[6],[29]
Principal		$ 36,474	[5],[14]	$ 36,947	[6],[29]
Cost		35,961	[5],[14]	36,358	[6],[29]
Fair value		$ 36,474	[5],[14]	$ 36,947	[6],[29]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		2,826,667	[5]	2,826,667	[6],[31]
Total Rate	[6],[31]			12%
PIK Rate	[6],[31]			12%
Cost		$ 110	[5]	$ 123	[6],[31]
Fair value		$ 500	[5]	$ 623	[6],[31]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.69%	[5],[14]	12.23%	[6],[29]
Reference Rate and Spread		7.50%	[5],[14]	7.50%	[6],[29]
Principal		$ 651	[5],[14]	$ 500	[6],[29]
Cost		639	[5],[14]	483	[6],[29]
Fair value		$ 651	[5],[14]	$ 500	[6],[29]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.69%	[5],[14]	12.23%	[6],[29]
Reference Rate and Spread		7.50%	[5],[14]	7.50%	[6],[29]
Principal		$ 2,027	[5],[14]	$ 2,079	[6],[29]
Cost		2,027	[5],[14]	2,079	[6],[29]
Fair value		$ 2,027	[5],[14]	$ 2,079	[6],[29]
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		627	[32]	627	[29]
Cost		$ 811	[32]	$ 811	[29]
Fair value		$ 13,510	[32]	$ 14,970	[29]	$ 15,120		12,420
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						10%
Reference Rate and Spread						6.75%
Fair value						$ 2,450		2,550
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6.75%	[27]	6.75%	[30]
Principal		$ 0	[27]	$ 0	[30]
Cost		0	[27]	0	[30]
Fair value		$ 0	[27]	$ 0	[30]
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15%	[14]	13.75%	[29]
Reference Rate and Spread		6.75%	[14]	6.75%	[29]
Principal		$ 2,450	[14]	$ 2,450	[29]
Cost		2,448	[14]	2,444	[29]
Fair value		$ 2,450	[14]	$ 2,450	[29]
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		472,579	[12]	472,579	[11]
Cost		$ 4,429	[12]	$ 4,429	[11]
Fair value		$ 0	[12]	$ 0	[11]
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		23.35%	[12],[16],[17]	18%	[11]
Reference Rate and Spread	[12],[16],[17]	18%
PIK Rate	[12],[16],[17]	23.35%
Principal		$ 2,431	[12],[16],[17]	$ 2,297	[11]
Cost		2,431	[12],[16],[17]	2,297	[11]
Fair value		$ 2,151	[12],[16],[17]	$ 2,297	[11]
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		21.48%	[12],[16],[17]	19.75%	[11],[33]
Reference Rate and Spread	[12],[16],[17]	16%
PIK Rate		21.48%	[12],[16],[17]	19.75%	[11],[33]
Principal		$ 4,034	[12],[16],[17]	$ 4,034	[11],[33]
Cost		3,997	[12],[16],[17]	3,997	[11],[33]
Fair value		$ 280	[12],[16],[17]	$ 504	[11],[33]
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		3,150	[32]	3,150	[31]
Cost		$ 3,150	[32]	$ 3,150	[31]
Fair value		$ 6,550	[32]	$ 5,540	[31]	$ 5,880		3,150
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						13%
Reference Rate and Spread						11.50%
Fair value						$ 10,421		11,344
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		11.50%	[14],[27]	11.50%	[29],[30]
Principal		$ 0	[14],[27]	$ 0	[29],[30]
Cost		(12)	[14],[27]	(14)	[29],[30]
Fair value		$ 0	[14],[27]	$ 0	[29],[30]
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		16.75%	[14]	15.63%	[29]
Reference Rate and Spread		11.50%	[14]	11.50%	[29]
Principal		$ 9,838	[14]	$ 9,999	[29]
Cost		9,771	[14]	9,920	[29]
Fair value		$ 9,838	[14]	$ 9,999	[29]
Investment, Identifier [Axis]: JorVet Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Fair value						$ 10,741		0
Investment, Identifier [Axis]: JorVet Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		107,406	[32]	107,406	[31]
Cost		$ 10,741	[32]	$ 10,741	[31]
Fair value		$ 10,741	[32]	$ 10,741	[31]
Investment, Identifier [Axis]: JorVet Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%
Principal		$ 25,650		$ 25,650
Cost		25,458		25,432
Fair value		$ 25,458		$ 25,432		$ 25,406		0
Investment, Identifier [Axis]: KBK Industries, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		325	[32]	325	[31]
Cost		$ 783	[32]	$ 783	[31]
Fair value		$ 12,360	[32]	15,570	[31]	13,930		13,620
Investment, Identifier [Axis]: KBK Industries, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		9%
Principal		$ 5,300
Cost		5,251
Fair value		$ 5,300		$ 0
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.81%	[5],[14]	12%	[6],[29]
Reference Rate and Spread		7.25%	[5],[14]	7.25%	[6],[29]
Principal		$ 1,042	[5],[14]	$ 1,064	[6],[29]
Cost		1,003	[5],[14]	1,019	[6],[29]
Fair value		$ 954	[5],[14]	$ 995	[6],[29]
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.81%	[5],[14]	12%	[6],[29]
Reference Rate and Spread		7.25%	[5],[14]	7.25%	[6],[29]
Principal		$ 7,467	[5],[14]	$ 7,505	[6],[29]
Cost		7,368	[5],[14]	7,391	[6],[29]
Fair value		$ 6,835	[5],[14]	$ 7,022	[6],[29]
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		800	[32],[39]	800	[31],[40]
Cost		$ 992	[32],[39]	$ 992	[31],[40]
Fair value		$ 2,780	[32],[39]	$ 2,850	[31],[40]
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units 1
Schedule of Investments [Line Items]
Fair value						12,240		12,310
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units 2
Schedule of Investments [Line Items]
Fair value						$ 2,460		2,460
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		581		581
Cost		$ 12,240		$ 12,240
Fair value		$ 7,730		$ 7,220
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%		11.50%		11.50%
Principal		$ 20,599		$ 20,415
Cost		20,569		20,374
Fair value		$ 20,569		$ 20,374		$ 20,349		20,324
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		9%		9%		9%
Principal		$ 3,860		$ 3,879
Cost		3,824		3,842
Fair value		$ 3,824		$ 3,842		$ 3,860		3,876
Investment, Identifier [Axis]: Kore Wireless Group Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.84%	[12],[17]	10.08%	[11],[28]
Reference Rate and Spread		5.50%	[12],[17]	5.50%	[11],[28]
Principal		$ 11,238	[12],[17]	$ 11,326	[11],[28]
Cost		11,205	[12],[17]	11,280	[11],[28]
Fair value		$ 10,657	[12],[17]	$ 10,930	[11],[28]
Investment, Identifier [Axis]: L.F. Manufacturing Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Fair value						3,150		2,560
Investment, Identifier [Axis]: L.F. Manufacturing Holdings, LLC, Preferred Member Units (non-voting)
Schedule of Investments [Line Items]
Fair value						$ 115		107
Investment, Identifier [Axis]: LKCM Headwater Investments I, L.P., LP Interests
Schedule of Investments [Line Items]
Units (percentage)		2.27%	[7],[8],[32],[43]	2.27%	[9],[10],[31],[44]
Cost		$ 1,746	[7],[8],[32],[43]	$ 1,746	[9],[10],[31],[44]
Fair value		$ 3,354	[7],[8],[32],[43]	$ 3,197	[9],[10],[31],[44]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.43%	[5],[14],[17]	11.21%	[6],[28],[29]
Reference Rate and Spread		7.25%	[5],[14],[17]	7.25%	[6],[28],[29]
Principal		$ 8,004	[5],[14],[17]	$ 8,106	[6],[28],[29]
Cost		7,998	[5],[14],[17]	8,087	[6],[28],[29]
Fair value		$ 8,004	[5],[14],[17]	$ 8,047	[6],[28],[29]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.45%	[5],[14],[17],[59]	11.67%	[6],[28],[29]
Reference Rate and Spread		7.25%	[5],[14],[17],[59]	7.25%	[6],[28],[29]
Principal		$ 9,154	[5],[14],[17],[59]	$ 9,197	[6],[28],[29]
Cost		9,141	[5],[14],[17],[59]	9,160	[6],[28],[29]
Fair value		$ 9,154	[5],[14],[17],[59]	$ 9,130	[6],[28],[29]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.44%	[5],[14],[17]	11.67%	[6],[28],[29]
Reference Rate and Spread		7.25%	[5],[14],[17]	7.25%	[6],[28],[29]
Principal		$ 10,778	[5],[14],[17]	$ 10,827	[6],[28],[29]
Cost		10,746	[5],[14],[17]	10,733	[6],[28],[29]
Fair value		$ 10,778	[5],[14],[17]	$ 10,749	[6],[28],[29]
Investment, Identifier [Axis]: LLFlex, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.22%	[5],[14],[17]	12.74%	[6],[29]
Reference Rate and Spread		9%	[5],[14],[17]	9%	[6],[29]
PIK Rate	[5],[14],[17]	1%
Principal		$ 4,428	[5],[14],[17]	$ 4,444	[6],[29]
Cost		4,320	[5],[14],[17]	4,370	[6],[29]
Fair value		$ 4,037	[5],[14],[17]	$ 4,350	[6],[29]
Investment, Identifier [Axis]: Lightbox Holdings, L.P., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.50%	[12],[17]	9.73%	[11]
Reference Rate and Spread		5%	[12],[17]	5%	[11]
Principal		$ 14,400	[12],[17]	$ 14,475	[11]
Cost		14,293	[12],[17]	14,349	[11]
Fair value		$ 14,040	[12],[17]	$ 13,968	[11]
Investment, Identifier [Axis]: Logix Acquisition Company, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.48%	[5],[14]	10.13%	[6],[29]
Reference Rate and Spread		5.75%	[5],[14]	5.75%	[6],[29]
Principal		$ 23,921	[5],[14]	$ 19,662	[6],[29]
Cost		22,663	[5],[14]	19,033	[6],[29]
Fair value		$ 19,137	[5],[14]	$ 16,221	[6],[29]
Investment, Identifier [Axis]: Looking Glass Investments, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		3	[7],[8]	3	[9],[10]
Cost		$ 125	[7],[8]	$ 125	[9],[10]
Fair value		$ 25	[7],[8]	$ 25	[9],[10]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.20%	[12],[14],[17],[60]	10.42%	[11],[28],[29]
Reference Rate and Spread		6%	[12],[14],[17],[60]	6%	[11],[28],[29]
Principal		$ 10,244	[12],[14],[17],[60]	$ 8,338	[11],[28],[29]
Cost		10,165	[12],[14],[17],[60]	8,267	[11],[28],[29]
Fair value		$ 10,244	[12],[14],[17],[60]	$ 8,338	[11],[28],[29]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.20%	[12],[14],[17]	10.42%	[11],[28],[29]
Reference Rate and Spread		6%	[12],[14],[17]	6%	[11],[28],[29]
Principal		$ 7,836	[12],[14],[17]	$ 7,876	[11],[28],[29]
Cost		7,756	[12],[14],[17]	7,784	[11],[28],[29]
Fair value		$ 7,836	[12],[14],[17]	$ 7,876	[11],[28],[29]
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		66,000		66,000
Cost		$ 4,400		$ 4,400
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		4,000		4,000
Cost		$ 6,000		$ 6,000
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: MH Corbin Holding LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13%	[15]	13%		13%
Principal		$ 5,960	[15]	$ 6,156
Cost		5,960	[15]	6,156
Fair value		$ 5,503	[15]	$ 4,548		$ 4,288		5,934
Investment, Identifier [Axis]: MS Private Loan Fund I, LP, LP Interests
Schedule of Investments [Line Items]
Units (percentage)		14.51%	[7],[8],[32],[43]	14.51%	[9],[10],[31],[44]
Cost		$ 14,250	[7],[8],[32],[43]	$ 14,250	[9],[10],[31],[44]
Fair value		14,635	[7],[8],[32],[43]	14,833	[9],[10],[31],[44]
Investment, Identifier [Axis]: MS Private Loan Fund I, LP, Secured Debt
Schedule of Investments [Line Items]
Principal		0	[7],[8],[27]	0	[9],[10],[30]
Cost		0	[7],[8],[27]	0	[9],[10],[30]
Fair value		0	[7],[8],[27]	0	[9],[10],[30]
Investment, Identifier [Axis]: MS Private Loan Fund, LP Interests
Schedule of Investments [Line Items]
Fair value		14,635		14,833		10,787		2,581
Investment, Identifier [Axis]: MS Private Loan Fund, Secured Debt 1
Schedule of Investments [Line Items]
Fair value		0		0
Investment, Identifier [Axis]: MS Private Loan Fund, Secured Debt 2
Schedule of Investments [Line Items]
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: MSC Adviser I, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)	[31],[61]			1
Units (percentage)	[32],[62]	100%
Cost		$ 29,500	[32],[62]	$ 29,500	[31],[61]
Fair value		$ 133,970	[32],[62]	$ 122,930	[31],[61]	118,320		140,400
Investment, Identifier [Axis]: MSC Income Fund, Inc., Common Equity
Schedule of Investments [Line Items]
Units (in shares)		350,451	[7],[8],[32]	94,697	[9],[10],[31]
Cost		$ 2,750	[7],[8],[32]	$ 750	[9],[10],[31]
Fair value		$ 2,688	[7],[8],[32]	$ 753	[9],[10],[31]	$ 750		0
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.91%	[5],[14]	11.79%	[6],[29],[63]
Reference Rate and Spread		7.25%	[5],[14]	7.25%	[6],[29],[63]
Principal		$ 2,373	[5],[14]	$ 3,103	[6],[29],[63]
Cost		2,339	[5],[14]	3,063	[6],[29],[63]
Fair value		$ 2,373	[5],[14]	$ 3,083	[6],[29],[63]
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.91%	[5],[14]	11.09%	[6],[29]
Reference Rate and Spread		7.25%	[5],[14]	7.25%	[6],[29]
Principal		$ 15,147	[5],[14]	$ 15,324	[6],[29]
Cost		14,980	[5],[14]	15,122	[6],[29]
Fair value		15,147	[5],[14]	$ 15,224	[6],[29]
Investment, Identifier [Axis]: Market Force Information, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)				743,921
Cost				$ 16,642
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				15.13%	[29]	12.13%
Reference Rate and Spread		11%		11%	[29]	11%
Principal	[29]			$ 6,275
Cost	[29]			6,253
Fair value		$ 0		$ 6,090	[29]	$ 4,400		3,400
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate				12%	[33]	12%
PIK Rate				12%	[33]	12%
Principal	[33]			$ 26,079
Cost	[33]			25,952
Fair value		$ 0		$ 1,610	[33]	$ 7,531		8,936
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		1,537,219	[32]	1,537,219
Cost		$ 1,537	[32]	$ 1,537
Fair value		$ 1,400	[32]	$ 1,537
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		5,915,585	[32]	5,915,585	[31]
Total Rate		8%	[32]	8%	[31]
PIK Rate		8%	[32]	8%	[31]
Cost		$ 6,127	[32]	$ 6,010	[31]
Fair value		6,245	[32]	6,010	[31]
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[27]	0	[30]
Cost		0	[27]	0	[30]
Fair value		$ 0	[27]	$ 0	[30]
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.75%		12.75%
Principal		$ 23,802		$ 23,802
Cost		23,599		23,576
Fair value		$ 23,599		$ 23,576
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6.25%	[5],[14],[17],[27]	6.25%	[6],[28],[29],[30]
Principal		$ 0	[5],[14],[17],[27]	$ 0	[6],[28],[29],[30]
Cost		(57)	[5],[14],[17],[27]	(63)	[6],[28],[29],[30]
Fair value		$ (57)	[5],[14],[17],[27]	$ (63)	[6],[28],[29],[30]
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.44%	[5],[14],[17]	9.86%	[6],[28],[29]
Reference Rate and Spread		6.25%	[5],[14],[17]	6.25%	[6],[28],[29]
Principal		$ 24,123	[5],[14],[17]	$ 26,075	[6],[28],[29]
Cost		23,741	[5],[14],[17]	25,619	[6],[28],[29]
Fair value		$ 23,945	[5],[14],[17]	$ 25,181	[6],[28],[29]
Investment, Identifier [Axis]: Mills Fleet Farm Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.77%	[5],[14],[17]	10.66%	[6],[29]
Reference Rate and Spread		6.50%	[5],[14],[17]	6.25%	[6],[29]
Principal		$ 18,769	[5],[14],[17]	$ 18,769	[6],[29]
Cost		18,618	[5],[14],[17]	18,562	[6],[29]
Fair value		$ 17,884	[5],[14],[17]	$ 18,338	[6],[29]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		44,445,814	[5],[8],[13]	44,445,814	[6],[10],[18]
Cost		$ 889	[5],[8],[13]	$ 889	[6],[10],[18]
Fair value		$ 889	[5],[8],[13]	$ 889	[6],[10],[18]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[5],[8],[13],[14]	12.54%
Reference Rate and Spread		7%	[5],[8],[13],[14]	7%	[6],[10],[18],[29],[30]
Principal		$ 3,709	[5],[8],[13],[14]	$ 0	[6],[10],[18],[29],[30]
Cost		3,652	[5],[8],[13],[14]	(64)	[6],[10],[18],[29],[30]
Fair value		$ 3,648	[5],[8],[13],[14]	$ (64)	[6],[10],[18],[29],[30]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.54%	[5],[8],[13],[14]	11.73%	[6],[10],[18],[29]
Reference Rate and Spread		7%	[5],[8],[13],[14]	7%	[6],[10],[18],[29]
Principal		$ 10,107	[5],[8],[13],[14]	$ 10,107	[6],[10],[18],[29]
Cost		9,944	[5],[8],[13],[14]	9,923	[6],[10],[18],[29]
Fair value		$ 10,899	[5],[8],[13],[14]	$ 10,714	[6],[10],[18],[29]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.54%	[5],[8],[13],[14],[17]	11.73%	[6],[10],[18],[29]
Reference Rate and Spread		7%	[5],[8],[13],[14],[17]	7%	[6],[10],[18],[29]
Principal		$ 17,038	[5],[8],[13],[14],[17]	$ 17,038	[6],[10],[18],[29]
Cost		16,779	[5],[8],[13],[14],[17]	16,746	[6],[10],[18],[29]
Fair value		$ 17,038	[5],[8],[13],[14],[17]	$ 17,038	[6],[10],[18],[29]
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		5,873	[32]	5,873	[31]
Cost		$ 2,720	[32]	$ 2,720	[31]
Fair value		27,150	[32]	22,830	[31]	$ 16,210		8,840
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						10%
Fair value						$ 6,098		6,378
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[27]	0	[30]
Cost		0	[27]	0	[30]
Fair value		$ 0	[27]	$ 0	[30]
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%		10%
Principal		$ 5,746		$ 5,746
Cost		5,746		5,746
Fair value		$ 5,746		$ 5,746
Investment, Identifier [Axis]: NAPCO Precast, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		2,955		2,955
Cost		$ 2,975		$ 2,975
Fair value		$ 12,710		$ 11,830		11,830		13,560
Investment, Identifier [Axis]: NBG Acquisition Inc, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.71%	[12],[14],[16]	9.67%	[11],[29]
Reference Rate and Spread		5.50%	[12],[14],[16]	5.50%	[11],[29]
Principal		$ 3,849	[12],[14],[16]	$ 3,849	[11],[29]
Cost		3,834	[12],[14],[16]	3,834	[11],[29]
Fair value		$ 154	[12],[14],[16]	$ 1,251	[11],[29]
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)	[31]			65,962
Cost	[31]			$ 3,717
Fair value				4,790	[31]	$ 5,470		6,440
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 1
Schedule of Investments [Line Items]
Units (in shares)	[32]	65,962
Cost	[32]	$ 114
Fair value	[32]	145
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 1.1
Schedule of Investments [Line Items]
Fair value		$ 3,865		4,615
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 2
Schedule of Investments [Line Items]
Units (in shares)	[32]	65,962
Cost	[32]	$ 3,603
Fair value	[32]	3,865
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 2.1
Schedule of Investments [Line Items]
Fair value		$ 145		$ 175
Investment, Identifier [Axis]: NRP Jones, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%
Principal		$ 2,080		$ 2,080
Cost		2,080		2,080
Fair value		$ 2,080		$ 2,080		$ 2,080		2,080
Investment, Identifier [Axis]: NTM Acquisition Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.64%	[12],[14],[17]	9.50%	[11],[29]
Reference Rate and Spread		7.25%	[12],[14],[17]	6.25%	[11],[29]
PIK Rate		1%	[12],[14],[17]	1%	[11],[29]
Principal		$ 4,237	[12],[14],[17]	$ 4,358	[11],[29]
Cost		4,237	[12],[14],[17]	4,358	[11],[29]
Fair value		$ 4,068	[12],[14],[17]	$ 4,228	[11],[29]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.13%	[5],[14],[17],[64]	10.85%	[6],[28],[29],[65]
Reference Rate and Spread		8%	[5],[14],[17],[64]	8%	[6],[28],[29],[65]
Principal		$ 2,919	[5],[14],[17],[64]	$ 3,941	[6],[28],[29],[65]
Cost		2,797	[5],[14],[17],[64]	3,797	[6],[28],[29],[65]
Fair value		$ 2,811	[5],[14],[17],[64]	$ 3,720	[6],[28],[29],[65]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.19%	[5],[14],[17]	12.56%	[6],[28],[29]
Reference Rate and Spread		8%	[5],[14],[17]	8%	[6],[28],[29]
Principal		$ 39,381	[5],[14],[17]	$ 39,851	[6],[28],[29]
Cost		38,747	[5],[14],[17]	39,094	[6],[28],[29]
Fair value		$ 37,923	[5],[14],[17]	$ 37,616	[6],[28],[29]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		20%	[5]	20%	[6]
PIK Rate		20%	[5]	20%	[6]
Principal		$ 7,190	[5]	$ 6,509	[6]
Cost		6,918	[5]	6,194	[6]
Fair value		$ 6,934	[5]	$ 6,194	[6]
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		6,987	[32]	6,987
Cost		$ 6,987	[32]	$ 6,987
Fair value		$ 12,790	[32]	$ 7,700		$ 7,700		7,700
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%				12%
Reference Rate and Spread	[29],[30]			7%
Principal		$ 21,294		$ 0	[29],[30]
Cost		21,166		0	[29],[30]
Fair value		$ 21,294		0	[29],[30]	$ 10,423		10,412
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 1.1
Schedule of Investments [Line Items]
Reference Rate and Spread		7%
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%
Principal		$ 10,500		$ 20,094
Cost		10,445		19,972
Fair value		$ 10,500		20,094		$ 11,373		4,829
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Total Rate		12%
Fair value		$ 21,294		$ 20,094
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal				$ 10,500
Cost				10,434
Fair value		$ 10,500		$ 10,500
Investment, Identifier [Axis]: NexRev LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		103,144,186	[32]	103,144,186	[31]
Cost		$ 8,213	[32]	$ 8,213	[31]
Fair value		3,450	[32]	1,110	[31]	$ 940		2,690
Investment, Identifier [Axis]: NexRev LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						11%
Fair value						$ 8,262		14,045
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[27]	0	[30]
Cost		0	[27]	0	[30]
Fair value		$ 0	[27]	$ 0	[30]
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%		11%
Principal		$ 9,811		$ 11,465
Cost		9,725		11,335
Fair value		$ 8,368		$ 8,477
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6.25%	[5],[14],[17],[27]	6.25%	[6],[29],[30]
Principal		$ 0	[5],[14],[17],[27]	$ 0	[6],[29],[30]
Cost		(1)	[5],[14],[17],[27]	(1)	[6],[29],[30]
Fair value		$ 0	[5],[14],[17],[27]	$ 0	[6],[29],[30]
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Reference Rate and Spread		6.25%	[5],[14],[17],[27]	6.25%	[6],[29],[30]
Principal		$ 0	[5],[14],[17],[27]	$ 0	[6],[29],[30]
Cost		(29)	[5],[14],[17],[27]	(38)	[6],[29],[30]
Fair value		$ (29)	[5],[14],[17],[27]	$ (38)	[6],[29],[30]
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.26%	[5],[14],[17]	9.99%	[6],[29]
Reference Rate and Spread		6%	[5],[14],[17]	6.25%	[6],[29]
Principal		$ 20,467	[5],[14],[17]	$ 21,666	[6],[29]
Cost		20,291	[5],[14],[17]	21,418	[6],[29]
Fair value		$ 20,467	[5],[14],[17]	$ 21,666	[6],[29]
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Fair value						$ 11,560		13,500
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		406		406
Cost		$ 10,200		$ 10,200
Fair value		$ 8,380		$ 8,040
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		2,062		2,062
Cost		$ 2,062		$ 2,062
Fair value		$ 5,150		$ 5,150
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.75%	[14]	10.63%	[29]	7.63%
Reference Rate and Spread		6.50%	[14]	6.50%	[29]	6.50%
Principal		$ 4,400	[14]	$ 4,400	[29]
Cost		4,399	[14]	4,399	[29]
Fair value		$ 4,399	[14]	$ 4,399	[29]	$ 3,200		1,720
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%
Principal		$ 18,440		$ 18,440
Cost		18,420		18,414
Fair value		$ 18,420		$ 18,414		$ 18,440		17,240
Investment, Identifier [Axis]: OMi Topco, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		900	[32]	900	[31]
Cost		$ 1,080	[32]	$ 1,080	[31]
Fair value		$ 29,310	[32]	$ 22,810	[31]	$ 20,300		20,210
Investment, Identifier [Axis]: OMi Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%
Principal		$ 14,250		$ 15,750
Cost		14,159		15,634
Fair value		$ 14,250		$ 15,750		$ 16,750		18,000
Investment, Identifier [Axis]: OVG Business Services, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[6],[29]			10.64%
Reference Rate and Spread	[6],[29]			6.25%
Principal	[6],[29]			$ 13,930
Cost	[6],[29]			13,813
Fair value	[6],[29]			$ 13,094
Investment, Identifier [Axis]: Obra Capital, Inc, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[12],[17]	11.22%
Reference Rate and Spread	[12],[17]	6%
Principal	[12],[17]	$ 18,230
Cost	[12],[17]	17,243
Fair value	[12],[17]	$ 13,763
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Common Stock
Schedule of Investments [Line Items]
Units (in shares)		635		635
Cost		$ 830		$ 830
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		912		912
Total Rate		7%		7%
PIK Rate		7%		7%
Cost		$ 1,981		$ 1,981
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%	[16]	12%	[33]	12%
PIK Rate		12%	[16]	12%	[33]	12%
Principal		$ 964	[16]	$ 964	[33]
Cost		964	[16]	964	[33]
Fair value		$ 441	[16]	$ 569	[33]	$ 808		935
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%	[16]	12%	[33]	12%
PIK Rate		12%	[16]	12%	[33]	12%
Principal		$ 983	[16]	$ 983	[33]
Cost		983	[16]	983	[33]
Fair value		$ 450	[16]	$ 580	[33]	$ 825		954
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12%	[16]	12%	[33]	12%
PIK Rate		12%	[16]	12%	[33]	12%
Principal		$ 2,116	[16]	$ 2,116	[33]
Cost		2,116	[16]	2,116	[33]
Fair value		$ 969	[16]	$ 1,249	[33]	$ 1,776		2,055
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		12%	[16]	12%	[33]	12%
PIK Rate		12%	[16]	12%	[33]	12%
Principal		$ 4,415	[16]	$ 4,415	[33]
Cost		4,415	[16]	4,415	[33]
Fair value		$ 2,022	[16]	$ 2,606	[33]	$ 3,704		4,286
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Unsecured Debt
Schedule of Investments [Line Items]
Total Rate		10%	[16]	10%	[33]	10%
PIK Rate		10%	[16]	10%	[33]	10%
Principal		$ 305	[16]	$ 305	[33]
Cost		305	[16]	305	[33]
Fair value		$ 305	[16]	$ 305	[33]	$ 197		191
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Warrants
Schedule of Investments [Line Items]
Units (in shares)		4,699	[25]	4,699	[26]
Cost		$ 1,089	[25]	$ 1,089	[26]
Fair value		$ 0	[25]	$ 0	[26]
Investment, Identifier [Axis]: Oneliance, LLC, Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		1,128		1,056
Cost		$ 1,128		$ 1,056
Fair value		$ 1,128		$ 1,056		$ 1,056		1,056
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						12.06%
Reference Rate and Spread						11%
Fair value						$ 5,553		5,547
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		11%	[14],[27]	11%	[29],[30]
Principal		$ 0	[14],[27]	$ 0	[29],[30]
Cost		0	[14],[27]	0	[29],[30]
Fair value		$ 0	[14],[27]	$ 0	[29],[30]
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		16.25%	[14]	15.13%	[29]
Reference Rate and Spread		11%	[14]	11%	[29]
Principal		$ 5,520	[14]	$ 5,600	[29]
Cost		5,485	[14]	5,559	[29]
Fair value		$ 5,424	[14]	$ 5,559	[29]
Investment, Identifier [Axis]: Orttech Holdings, LLC, Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		10,000	[32],[39]	10,000	[31],[40]
Cost		$ 10,000	[32],[39]	$ 10,000	[31],[40]
Fair value		$ 16,560	[32],[39]	$ 11,750	[31],[40]	$ 10,000		10,000
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						12%
Reference Rate and Spread						11%
Fair value						$ 23,779		24,150
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		11%	[14],[27]	11%	[29],[30]
Principal		$ 0	[14],[27]	$ 0	[29],[30]
Cost		0	[14],[27]	0	[29],[30]
Fair value		$ 0	[14],[27]	$ 0	[29],[30]
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		16.25%	[14]	15.13%	[29]
Reference Rate and Spread		11%	[14]	11%	[29]
Principal		$ 22,800	[14]	$ 23,600	[29]
Cost		22,658	[14]	23,429	[29]
Fair value		$ 22,800	[14]	$ 23,429	[29]
Investment, Identifier [Axis]: Ospemifene Royalty Sub LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.50%	[5],[16]	11.50%	[6],[33]
Principal		$ 4,461	[5],[16]	$ 4,489	[6],[33]
Cost		4,461	[5],[16]	4,489	[6],[33]
Fair value		75	[5],[16]	103	[6],[33]
Investment, Identifier [Axis]: Other, Affiliate Investments
Schedule of Investments [Line Items]
Fair value		0		0		0		0
Investment, Identifier [Axis]: Other, Control Investments
Schedule of Investments [Line Items]
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock
Schedule of Investments [Line Items]
Fair value						$ 18,490		14,360
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock 1
Schedule of Investments [Line Items]
Units (in shares)		2,000	[32]	2,000	[31]
Cost		$ 2,150	[32]	$ 2,150	[31]
Fair value		$ 18,070	[32]	$ 18,950	[31]
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock 2
Schedule of Investments [Line Items]
Units (in shares)		238,421	[39]	238,421
Cost		$ 238	[39]	$ 238
Fair value		$ 250	[39]	$ 238
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate						7.97%
Reference Rate and Spread						7%
Fair value						$ 19,645		12,381
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		8.75%	[14],[27]	7%	[29],[30]
Principal		$ 0	[14],[27]	$ 0	[29],[30]
Cost		(8)	[14],[27]	(9)	[29],[30]
Fair value		$ 0	[14],[27]	$ 0	[29],[30]
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.63%	[14]	10.25%	[29]
Reference Rate and Spread		8.75%	[14]	7%	[29]
Principal		$ 20,290	[14]	$ 21,655	[29]
Cost		20,083	[14]	21,408	[29]
Fair value		$ 20,290	[14]	$ 21,655	[29]
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[5],[8],[14]	14.50%
Reference Rate and Spread		6.25%	[5],[8],[14]	7.25%	[6],[10],[28],[29],[30]
Principal		$ 2,385	[5],[8],[14]	$ 0	[6],[10],[28],[29],[30]
Cost		2,230	[5],[8],[14]	(174)	[6],[10],[28],[29],[30]
Fair value		$ 2,385	[5],[8],[14]	$ (174)	[6],[10],[28],[29],[30]
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.64%	[5],[8],[14],[17]	11.80%	[6],[10],[28],[29]
Reference Rate and Spread		7.25%	[5],[8],[14],[17]	7.25%	[6],[10],[28],[29]
Principal		$ 27,552	[5],[8],[14],[17]	$ 28,265	[6],[10],[28],[29]
Cost		27,096	[5],[8],[14],[17]	27,749	[6],[10],[28],[29]
Fair value		$ 26,681	[5],[8],[14],[17]	$ 27,911	[6],[10],[28],[29]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.10%	[5],[14],[17]	10.26%	[6],[28],[29]
Reference Rate and Spread		5.75%	[5],[14],[17]	5.75%	[6],[28],[29]
Principal		$ 216	[5],[14],[17]	$ 541	[6],[28],[29]
Cost		125	[5],[14],[17]	437	[6],[28],[29]
Fair value		$ 216	[5],[14],[17]	$ 530	[6],[28],[29]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.92%	[5],[14],[17]	9.96%	[6],[28],[29],[66]
Reference Rate and Spread		5.75%	[5],[14],[17]	5.75%	[6],[28],[29],[66]
Principal		$ 3,221	[5],[14],[17]	$ 2,701	[6],[28],[29],[66]
Cost		3,140	[5],[14],[17]	2,609	[6],[28],[29],[66]
Fair value		$ 3,221	[5],[14],[17]	$ 2,649	[6],[28],[29],[66]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.88%	[5],[14],[17]	9.81%	[6],[28],[29]
Reference Rate and Spread		5.75%	[5],[14],[17]	5.75%	[6],[28],[29]
Principal		$ 18,692	[5],[14],[17]	$ 18,293	[6],[28],[29]
Cost		18,306	[5],[14],[17]	17,852	[6],[28],[29]
Fair value		$ 18,692	[5],[14],[17]	$ 17,939	[6],[28],[29]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Member Units
Schedule of Investments [Line Items]
Fair value						$ 39,750		26,970
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		13,800	[32]	13,800	[31]
Cost		$ 13,000	[32]	$ 13,000	[31]
Fair value		$ 44,090	[32]	43,260	[31]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						12%
Fair value						$ 28,681		32,674
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%
Principal		$ 3,500		0	[30]
Cost		3,496		0	[30]
Fair value		$ 3,500		0	[30]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%
Principal		$ 13,500		0	[30]
Cost		13,460		0	[30]
Fair value		$ 13,500		$ 0	[30]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 27,681		$ 28,681
Cost		27,571		28,537
Fair value		$ 27,681		$ 28,681
Investment, Identifier [Axis]: Power System Solutions, Common Equity
Schedule of Investments [Line Items]
Units (in shares)	[5]	1,234
Cost	[5]	$ 1,234
Fair value	[5]	$ 1,234
Investment, Identifier [Axis]: Power System Solutions, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread	[5],[14],[17],[27]	6.75%
Principal	[5],[14],[17],[27]	$ 0
Cost	[5],[14],[17],[27]	(91)
Fair value	[5],[14],[17],[27]	$ (91)
Investment, Identifier [Axis]: Power System Solutions, Secured Debt 2
Schedule of Investments [Line Items]
Reference Rate and Spread	[5],[14],[17],[27]	6.75%
Principal	[5],[14],[17],[27]	$ 0
Cost	[5],[14],[17],[27]	(91)
Fair value	[5],[14],[17],[27]	$ (91)
Investment, Identifier [Axis]: Power System Solutions, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	11.90%
Reference Rate and Spread	[5],[14],[17]	6.75%
Principal	[5],[14],[17]	$ 18,511
Cost	[5],[14],[17]	17,965
Fair value	[5],[14],[17]	$ 17,965
Investment, Identifier [Axis]: PrimeFlight Aviation Services, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	11.94%
Reference Rate and Spread	[5],[14],[17]	6.85%
Principal	[5],[14],[17]	$ 8,000
Cost	[5],[14],[17]	7,770
Fair value	[5],[14],[17]	$ 7,770
Investment, Identifier [Axis]: Principle Environmental, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		1,037		1,037
Cost		$ 1,200		$ 1,200
Fair value		$ 500		$ 590		740		710
Investment, Identifier [Axis]: Principle Environmental, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		21,806	[32]	21,806	[31]
Cost		$ 5,709	[32]	$ 5,709	[31]
Fair value		$ 10,480	[32]	12,420	[31]	$ 11,530		11,160
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13%
Principal		$ 5,897
Cost		5,817
Fair value		5,817
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate						13%
Principal	[30]			0
Cost	[30]			0
Fair value		$ 0		$ 0	[30]	$ 471		1,465
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%		13%		13%
Principal				$ 5,897
Cost				5,806
Fair value		$ 5,817		$ 5,806		$ 5,820		5,808
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[5],[14],[17],[27]	6.25%	[6],[29],[30]
Principal		$ 0	[5],[14],[17],[27]	$ 0	[6],[29],[30]
Cost		(16)	[5],[14],[17],[27]	(18)	[6],[29],[30]
Fair value		$ (16)	[5],[14],[17],[27]	$ (18)	[6],[29],[30]
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.22%	[5],[14],[17]	10.64%	[6],[29]
Reference Rate and Spread		6%	[5],[14],[17]	6.25%	[6],[29]
Principal		$ 29,271	[5],[14],[17]	$ 29,475	[6],[29]
Cost		28,901	[5],[14],[17]	29,040	[6],[29]
Fair value		$ 29,271	[5],[14],[17]	$ 29,419	[6],[29]
Investment, Identifier [Axis]: Quality Lease Service, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,000		1,000
Cost		$ 7,546		$ 7,513
Fair value		460		525		$ 1,075		2,149
Investment, Identifier [Axis]: Quality Lease Service, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Fair value		0		0
Investment, Identifier [Axis]: Quality Lease Service, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						12%
Fair value		$ 0		$ 0		$ 0		0
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6.75%	[5],[14],[17],[27]	6.75%	[6],[28],[29],[30]
Principal		$ 0	[5],[14],[17],[27]	$ 0	[6],[28],[29],[30]
Cost		(9)	[5],[14],[17],[27]	(11)	[6],[28],[29],[30]
Fair value		$ (37)	[5],[14],[17],[27]	$ (11)	[6],[28],[29],[30]
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.88%	[5],[14],[17]	10.56%	[6],[28],[29]
Reference Rate and Spread		6.75%	[5],[14],[17]	6.75%	[6],[28],[29]
Principal		$ 13,369	[5],[14],[17]	$ 13,369	[6],[28],[29]
Cost		13,261	[5],[14],[17]	13,241	[6],[28],[29]
Fair value		$ 12,171	[5],[14],[17]	$ 12,094	[6],[28],[29]
Investment, Identifier [Axis]: RM Bidder, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		2,779	[5]	2,779	[6]
Cost		$ 46	[5]	$ 46	[6]
Fair value		$ 17	[5]	$ 19	[6]
Investment, Identifier [Axis]: RM Bidder, LLC, Warrants
Schedule of Investments [Line Items]
Units (in shares)		327,532	[5],[67]	327,532	[6],[68]
Cost		$ 425	[5],[67]	$ 425	[6],[68]
Fair value		$ 0	[5],[67]	$ 0	[6],[68]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.01%	[5],[14],[17]	12.02%	[6],[28],[29],[69]
Reference Rate and Spread		7.75%	[5],[14],[17]	7.75%	[6],[28],[29],[69]
Principal		$ 1,781	[5],[14],[17]	$ 1,361	[6],[28],[29],[69]
Cost		1,766	[5],[14],[17]	1,343	[6],[28],[29],[69]
Fair value		$ 1,645	[5],[14],[17]	$ 1,258	[6],[28],[29],[69]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.01%	[5],[14],[17]	11.49%	[6],[28],[29]
Reference Rate and Spread		7.75%	[5],[14],[17]	7.75%	[6],[28],[29]
Principal		$ 15,141	[5],[14],[17]	$ 16,623	[6],[28],[29]
Cost		15,055	[5],[14],[17]	16,506	[6],[28],[29]
Fair value		$ 13,985	[5],[14],[17]	$ 15,367	[6],[28],[29]
Investment, Identifier [Axis]: Research Now Group, Inc. and Survey Sampling International, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.80%	[12],[14],[17]	8.84%	[11],[29]
Reference Rate and Spread		5.50%	[12],[14],[17]	5.50%	[11],[29]
Principal		$ 19,862	[12],[14],[17]	$ 19,966	[11],[29]
Cost		19,696	[12],[14],[17]	19,745	[11],[29]
Fair value		$ 14,238	[12],[14],[17]	$ 15,116	[11],[29]
Investment, Identifier [Axis]: River Aggregates, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,500	[39]	1,500	[40]
Cost		$ 369	[39]	$ 369	[40]
Fair value		$ 3,620	[39]	$ 3,620	[40]	3,380		3,280
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		11,070		11,070
Cost		$ 11,070		$ 11,070
Fair value		6,140		14,880		$ 15,740		11,070
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate						12%
Reference Rate and Spread						11%
Fair value						$ 35,774		35,956
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[27]	0	[29],[30]
Cost		(31)	[27]	(35)	[29],[30]
Fair value		$ (31)	[27]	$ (35)	[29],[30]
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%		12.50%	[29]
Principal		$ 35,010		$ 35,685	[29]
Cost		34,769		35,404	[29]
Fair value		$ 34,325		$ 35,404	[29]
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		250		250
Cost		$ 2,500		$ 2,500
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Secured Debt
Schedule of Investments [Line Items]
Total Rate	[33],[38],[70]			12%
Principal	[33],[38],[70]			$ 30,369
Cost	[33],[38],[70]			29,865
Fair value	[33],[38],[70]			$ 0
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[6],[28],[29]			10.97%
Reference Rate and Spread		6.50%	[5],[14],[17],[27]	6.50%	[6],[28],[29]
Principal		$ 0	[5],[14],[17],[27]	$ 311	[6],[28],[29]
Cost		(10)	[5],[14],[17],[27]	300	[6],[28],[29]
Fair value		$ 0	[5],[14],[17],[27]	$ 311	[6],[28],[29]
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.65%	[5],[14],[17]	10.32%	[6],[28],[29]
Reference Rate and Spread		6.50%	[5],[14],[17]	6.50%	[6],[28],[29]
Principal		$ 2,333	[5],[14],[17]	$ 2,333	[6],[28],[29]
Cost		2,297	[5],[14],[17]	2,291	[6],[28],[29]
Fair value		$ 2,333	[5],[14],[17]	$ 2,333	[6],[28],[29]
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.65%	[5],[14],[17],[71]	10.32%	[6],[28],[29]
Reference Rate and Spread		7.50%	[5],[14],[17],[71]	6.50%	[6],[28],[29]
Principal		$ 4,418	[5],[14],[17],[71]	$ 3,173	[6],[28],[29]
Cost		4,342	[5],[14],[17],[71]	3,125	[6],[28],[29]
Fair value		$ 4,418	[5],[14],[17],[71]	$ 3,173	[6],[28],[29]
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.43%	[5],[14],[17]	13.02%	[6],[28],[29]
Reference Rate and Spread		6%	[5],[14],[17]	6.25%	[6],[28],[29]
PIK Rate		2%	[5],[14],[17]	2%	[6],[28],[29]
Principal		$ 5,682	[5],[14],[17]	$ 5,625	[6],[28],[29]
Cost		5,656	[5],[14],[17]	5,590	[6],[28],[29]
Fair value		$ 5,343	[5],[14],[17]	$ 5,037	[6],[28],[29]
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.43%	[5],[14],[17]	13.02%	[6],[28],[29]
Reference Rate and Spread		6%	[5],[14],[17]	6.25%	[6],[28],[29]
PIK Rate		2%	[5],[14],[17]	2%	[6],[28],[29]
Principal		$ 8,425	[5],[14],[17]	$ 8,340	[6],[28],[29]
Cost		8,338	[5],[14],[17]	8,223	[6],[28],[29]
Fair value		$ 7,922	[5],[14],[17]	$ 7,478	[6],[28],[29]
Investment, Identifier [Axis]: SI East, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		165	[32]	157	[31]
Cost		$ 1,525	[32]	$ 1,218	[31]
Fair value		15,780	[32]	13,650	[31]	$ 12,830		11,570
Investment, Identifier [Axis]: SI East, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						10.25%
Fair value						$ 64,361		65,850
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[27]	0	[30]
Cost		0	[27]	0	[30]
Fair value		$ 0	[27]	$ 0	[30]
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.78%	[72]	9.50%
Principal		$ 54,536	[72]	$ 89,786
Cost		54,268	[72]	89,708
Fair value		$ 54,536	[72]	89,786
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Total Rate		12.78%
Fair value		$ 54,536		0
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Fair value		$ 0		$ 89,786
Investment, Identifier [Axis]: SIB Holdings, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)		95,238	[5]	95,238	[6]
Cost		$ 200	[5]	$ 200	[6]
Fair value		$ 97	[5]	$ 146	[6]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.68%	[5],[14],[17]	11.01%	[6],[29]
Reference Rate and Spread		6.25%	[5],[14],[17]	6.25%	[6],[29]
Principal		$ 590	[5],[14],[17]	$ 417	[6],[29]
Cost		582	[5],[14],[17]	408	[6],[29]
Fair value		$ 534	[5],[14],[17]	$ 393	[6],[29]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.68%	[5],[14],[17]	11.01%	[6],[29]
Reference Rate and Spread		6.25%	[5],[14],[17]	6.25%	[6],[29]
Principal		$ 1,534	[5],[14],[17]	$ 1,553	[6],[29]
Cost		1,511	[5],[14],[17]	1,527	[6],[29]
Fair value		$ 1,387	[5],[14],[17]	$ 1,433	[6],[29]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.68%	[5],[14],[17]	11.01%	[6],[29]
Reference Rate and Spread		6.25%	[5],[14],[17]	6.25%	[6],[29]
Principal		$ 7,633	[5],[14],[17]	$ 7,750	[6],[29]
Cost		7,526	[5],[14],[17]	7,626	[6],[29]
Fair value		$ 6,899	[5],[14],[17]	$ 7,151	[6],[29]
Investment, Identifier [Axis]: SPAU Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		638,710	[5]	638,710	[6]
Cost		$ 639	[5]	$ 639	[6]
Fair value		$ 550	[5]	$ 639	[6]
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	12.96%
Reference Rate and Spread		7.50%	[5],[14],[17]	7.50%	[6],[28],[29],[30]
Principal		$ 958	[5],[14],[17]	$ 0	[6],[28],[29],[30]
Cost		907	[5],[14],[17]	(57)	[6],[28],[29],[30]
Fair value		$ 958	[5],[14],[17]	$ (57)	[6],[28],[29],[30]
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.61%	[5],[14],[17]	11.06%	[6],[28],[29]
Reference Rate and Spread		7.50%	[5],[14],[17]	7.50%	[6],[28],[29]
Principal		$ 15,808	[5],[14],[17]	$ 15,928	[6],[28],[29]
Cost		15,554	[5],[14],[17]	15,641	[6],[28],[29]
Fair value		$ 15,808	[5],[14],[17]	$ 15,928	[6],[28],[29]
Investment, Identifier [Axis]: Savers, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[11],[28],[29]			10.34%
Reference Rate and Spread	[11],[28],[29]			5.50%
Principal	[11],[28],[29]			$ 11,286
Cost	[11],[28],[29]			11,199
Fair value	[11],[28],[29]			$ 10,938
Investment, Identifier [Axis]: Slick Innovations, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		70,000	[32]	70,000	[31]
Cost		$ 456	[32]	$ 456	[31]
Fair value		$ 1,850	[32]	$ 1,530	[31]	$ 1,640		1,510
Investment, Identifier [Axis]: Slick Innovations, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14%		14%		13%
Principal		$ 13,040		$ 13,840
Cost		12,920		13,698
Fair value		$ 13,040		$ 13,840		$ 4,640		5,320
Investment, Identifier [Axis]: Slick Innovations, LLC, Warrants
Schedule of Investments [Line Items]
Fair value						440		400
Investment, Identifier [Axis]: Sonic Systems International, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)	[6]			9,968
Cost	[6]			$ 1,356
Fair value				$ 1,280	[6]	$ 1,420		1,070
Investment, Identifier [Axis]: Sonic Systems International, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				11.24%	[6],[29]	8.50%
Reference Rate and Spread				7.50%	[6],[29]	7.50%
Principal	[6],[29]			$ 15,769
Cost	[6],[29]			15,527
Fair value				$ 15,769	[6],[29]	$ 15,260		11,757
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)		863,636	[5]	863,636	[6]
Cost		$ 864	[5]	$ 864	[6]
Fair value		$ 1,208	[5]	$ 1,316	[6]
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		5.25%	[5],[14],[27]	5.75%	[6],[29],[30]
Principal		$ 0	[5],[14],[27]	$ 0	[6],[29],[30]
Cost		(62)	[5],[14],[27]	(71)	[6],[29],[30]
Fair value		$ (62)	[5],[14],[27]	$ (71)	[6],[29],[30]
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.90%	[5],[14]	9.69%	[6],[29]
Reference Rate and Spread		5.25%	[5],[14]	5.75%	[6],[29]
Principal		$ 35,094	[5],[14]	$ 41,255	[6],[29]
Cost		34,608	[5],[14]	40,603	[6],[29]
Fair value		$ 35,094	[5],[14]	$ 41,255	[6],[29]
Investment, Identifier [Axis]: Staples Canada ULC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.26%	[5],[8],[13],[14],[73]	11.83%	[6],[10],[18],[29],[74]
Reference Rate and Spread		7%	[5],[8],[13],[14],[73]	7%	[6],[10],[18],[29],[74]
Principal		$ 12,552	[5],[8],[13],[14],[73]	$ 13,740	[6],[10],[18],[29],[74]
Cost		12,523	[5],[8],[13],[14],[73]	13,698	[6],[10],[18],[29],[74]
Fair value		$ 11,660	[5],[8],[13],[14],[73]	$ 12,481	[6],[10],[18],[29],[74]
Investment, Identifier [Axis]: Stellant Systems, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.91%	[12],[14],[17]	10.05%	[11],[28],[29]
Reference Rate and Spread		5.50%	[12],[14],[17]	5.50%	[11],[28],[29]
Principal		$ 7,565	[12],[14],[17]	$ 7,623	[11],[28],[29]
Cost		7,508	[12],[14],[17]	7,559	[11],[28],[29]
Fair value		$ 7,234	[12],[14],[17]	$ 7,166	[11],[28],[29]
Investment, Identifier [Axis]: Student Resource Center, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		5,907,649	[5]	5,907,649	[6]
Cost		$ 0	[5]	$ 0	[6]
Fair value		$ 0	[5]	$ 0	[6]
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		8.50%	[5]	13.27%	[6]
Reference Rate and Spread	[6]			8.50%
PIK Rate	[5]	8.50%
Principal		$ 5,214	[5]	$ 5,000	[6]
Cost		4,770	[5]	4,556	[6]
Fair value		$ 4,770	[5]	$ 4,556	[6]
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		1,636		1,571
Cost		$ 4,500		$ 4,500
Fair value		$ 5,640		$ 4,500		$ 4,500		4,500
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%
Principal		$ 20,500		$ 21,500
Cost		20,405		21,378
Fair value		$ 20,405		$ 21,378		$ 21,355		21,332
Investment, Identifier [Axis]: Tacala Investment Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[29],[75],[76]			7.88%
Reference Rate and Spread	[29],[75],[76]			3.50%
Principal	[29],[75],[76]			$ 1,974
Cost	[29],[75],[76]			1,974
Fair value	[29],[75],[76]			$ 1,904
Investment, Identifier [Axis]: Team Public Choices, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.27%	[12],[14],[17]	9.93%	[11],[29]
Reference Rate and Spread		5%	[12],[14],[17]	5%	[11],[29]
Principal		$ 14,888	[12],[14],[17]	$ 14,964	[11],[29]
Cost		14,643	[12],[14],[17]	14,690	[11],[29]
Fair value		$ 14,466	[12],[14],[17]	$ 14,290	[11],[29]
Investment, Identifier [Axis]: Tectonic Financial, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		200,000	[32]	200,000	[31]
Cost		$ 2,000	[32]	$ 2,000	[31]
Fair value		$ 5,170	[32]	$ 5,630	[31]
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)				544
Cost				$ 9,245
Fair value				7,681		$ 7,314		8,579
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		544
Cost		$ 9,245
Fair value		$ 6,290		7,681
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		3,551
Cost		$ 355
Fair value		$ 533		$ 0
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%
Principal		$ 1,840		$ 1,840
Cost		1,840		1,840
Fair value		$ 1,840		$ 1,840		$ 15,185		15,141
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 15,200		$ 15,200
Cost		15,198		15,192
Fair value		$ 15,127		$ 15,120		1,840		1,040
Investment, Identifier [Axis]: Televerde, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		460	[32]	460
Cost		$ 1,290	[32]	$ 1,290
Fair value		$ 6,082	[32]	$ 5,408		5,145		7,280
Investment, Identifier [Axis]: Televerde, LLC, Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		248		248
Cost		$ 718		$ 718
Fair value		$ 1,794		$ 1,794		1,794		0
Investment, Identifier [Axis]: Tex Tech Tennis, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		1,000,000	[5],[39]	1,000,000	[6],[40]
Cost		$ 1,000	[5],[39]	$ 1,000	[6],[40]
Fair value		$ 2,040	[5],[39]	$ 1,830	[6],[40]
Investment, Identifier [Axis]: The Affiliati Network, LLC, Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		1,280,000	[32]	1,280,000	[31]
Cost		$ 6,400	[32]	$ 6,400	[31]
Fair value		6,400	[32]	$ 6,400	[31]	$ 6,400		6,400
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						11.83%
Fair value						$ 11,643		13,096
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				13%
Principal		0	[27]	$ 120
Cost		(12)	[27]	106
Fair value		$ (12)	[27]	$ 106
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%		13%
Principal		$ 8,921		$ 9,521
Cost		8,857		9,442
Fair value		$ 8,728		$ 9,442
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		615	[32]	615	[31]
Cost		$ 4,655	[32]	$ 4,655	[31]
Fair value		11,770	[32]	7,800	[31]	$ 8,090		8,660
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						12%
Fair value						$ 8,314		8,712
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		0	[27]	0	[30]
Cost		(3)	[27]	(5)	[30]
Fair value		$ 0	[27]	$ 0	[30]
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		12%
Principal		$ 7,920		$ 7,920
Cost		7,903		7,894
Fair value		$ 7,920		$ 7,920
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[11],[28],[29]			11.57%
Reference Rate and Spread	[11],[28],[29]			1.25%
PIK Rate	[11],[28],[29]			7.25%
Principal	[11],[28],[29]			$ 18,352
Cost	[11],[28],[29]			18,284
Fair value	[11],[28],[29]			$ 6,859
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[12],[14],[17]	6%
Reference Rate and Spread	[12],[14],[17]	1%
PIK Rate	[12],[14],[17]	6%
Principal	[12],[14],[17]	$ 9,457
Cost	[12],[14],[17]	3,903
Fair value	[12],[14],[17]	$ 3,924
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[12],[14],[17]	6%
Reference Rate and Spread	[12],[14],[17]	1%
PIK Rate	[12],[14],[17]	6%
Principal	[12],[14],[17]	$ 946
Cost	[12],[14],[17]	20
Fair value	[12],[14],[17]	$ 0
Investment, Identifier [Axis]: USA DeBusk LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.94%	[5],[14]	9.82%	[6],[29]
Reference Rate and Spread		5.75%	[5],[14]	5.75%	[6],[29]
Principal		$ 33,407	[5],[14]	$ 33,577	[6],[29]
Cost		32,936	[5],[14]	33,031	[6],[29]
Fair value		$ 33,407	[5],[14]	$ 33,577	[6],[29]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Common Stock
Schedule of Investments [Line Items]
Units (in shares)		945,507	[12]	945,507	[11]
Cost		$ 0	[12]	$ 0	[11]
Fair value		$ 0	[12]	$ 0	[11]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 1
Schedule of Investments [Line Items]
Units (in shares)		1,133,102	[12],[32]	1,133,102	[11],[31]
Total Rate		20%	[12],[32]	20%	[11],[31]
PIK Rate		20%	[12],[32]	20%	[11],[31]
Cost		$ 2,362	[12],[32]	$ 2,141	[11],[31]
Fair value		$ 2,833	[12],[32]	$ 2,833	[11],[31]	2,833		2,833
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 2
Schedule of Investments [Line Items]
Units (in shares)		1,521,122	[12]	1,521,122	[11]
Total Rate		20%	[12]	20%	[11]
PIK Rate		20%	[12]	20%	[11]
Cost		$ 2,188	[12]	$ 2,188	[11]
Fair value		$ 3,659	[12]	$ 1,991	[11]	$ 1,891		1,498
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 3
Schedule of Investments [Line Items]
Units (in shares)		2,281,682	[12]	2,281,682	[11]
Total Rate		19%	[12]	19%	[11]
PIK Rate		19%	[12]	19%	[11]
Cost		$ 3,667	[12]	$ 3,667	[11]
Fair value		$ 0	[12]	$ 0	[11]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 4
Schedule of Investments [Line Items]
Units (in shares)		4,336,866	[12]	4,336,866	[11]
Total Rate		13.50%	[12]	13.50%	[11]
PIK Rate		13.50%	[12]	13.50%	[11]
Cost		$ 7,924	[12]	$ 7,924	[11]
Fair value		$ 0	[12]	$ 0	[11]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Convertible Debt
Schedule of Investments [Line Items]
Total Rate		15%	[12]	15%	[11]	15%
PIK Rate		15%	[12]	15%	[11]	15%
Principal		$ 2,590	[12]	$ 2,403	[11]
Cost		2,590	[12]	2,403	[11]
Fair value		$ 6,159	[12]	$ 4,592	[11]	$ 2,588		2,375
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				10.76%	[11],[28],[29]	9.07%
Reference Rate and Spread		7.50%		5.50%	[11],[28],[29]	5.50%
PIK Rate				2%	[11],[28],[29]	2%
Principal	[11],[28],[29]			$ 406
Cost	[11],[28],[29]			405
Fair value		$ 0		$ 382	[11],[28],[29]	$ 366		371
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate				10.76%	[11],[28],[29]	9.07%
Reference Rate and Spread		7.50%		5.50%	[11],[28],[29]	5.50%
PIK Rate				2%	[11],[28],[29]	2%
Principal	[11],[28],[29]			$ 1,814
Cost	[11],[28],[29]			1,807
Fair value		$ 0		$ 1,712	[11],[28],[29]	$ 1,828		1,852
Investment, Identifier [Axis]: UnionRock Energy Fund II, LP, LP Interests
Schedule of Investments [Line Items]
Units (percentage)	[7],[8],[32],[43]	11.11%
Total Rate	[9],[10],[31],[44]			11.11%
Cost		$ 4,067	[7],[8],[32],[43]	$ 3,734	[9],[10],[31],[44]
Fair value		5,224	[7],[8],[32],[43]	5,855	[9],[10],[31],[44]	3,865		6,123
Investment, Identifier [Axis]: UnionRock Energy Fund III, LP, LP Interests
Schedule of Investments [Line Items]
Cost	[7],[8],[43]	150
Fair value		$ 150	[7],[8],[43]	$ 0
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Units (in shares)		4,000,000	[5],[39]	4,000,000	[6],[40]
Cost		$ 4,000	[5],[39]	$ 4,000	[6],[40]
Fair value		$ 0	[5],[39]	$ 0	[6],[40]
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		716,949	[5],[39]	716,949	[6],[40]
Total Rate		14%	[5],[39]	14%	[6],[40]
PIK Rate		14%	[5],[39]	14%	[6],[40]
Cost		$ 1,034	[5],[39]	$ 1,032	[6],[40]
Fair value		$ 220	[5],[39]	$ 220	[6],[40]
Investment, Identifier [Axis]: UserZoom Technologies, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	12.42%
Reference Rate and Spread	[5],[14],[17]	7.50%
Principal	[5],[14],[17]	$ 4,000
Cost	[5],[14],[17]	3,890
Fair value	[5],[14],[17]	$ 3,890
Investment, Identifier [Axis]: VORTEQ Coil Finishers, LLC, Common Equity
Schedule of Investments [Line Items]
Units (in shares)		1,038,462	[5],[32]	1,038,462	[6],[31]
Cost		$ 1,038	[5],[32]	$ 1,038	[6],[31]
Fair value		$ 3,810	[5],[32]	$ 3,930	[6],[31]
Investment, Identifier [Axis]: VVS Holdco LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		11,840	[32],[39]	11,840	[31],[40]
Cost		$ 11,840	[32],[39]	$ 11,840	[31],[40]
Fair value		$ 11,840	[32],[39]	$ 11,940	[31],[40]	$ 12,080		11,840
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate						11.50%
Fair value						$ 30,102		31,269
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[14],[27],[39]	6%	[29],[30],[40]
Principal		$ 0	[14],[27],[39]	$ 0	[29],[30],[40]
Cost		(10)	[14],[27],[39]	(21)	[29],[30],[40]
Fair value		$ (10)	[14],[27],[39]	$ (21)	[29],[30],[40]
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.50%	[39]	11.50%	[40]
Principal		$ 29,158	[39]	$ 30,400	[40]
Cost		28,958	[39]	30,158	[40]
Fair value		$ 28,958	[39]	$ 30,161	[40]
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		5.25%	[12],[14],[17],[27]	5.25%	[11],[29],[30]
Principal		$ 0	[12],[14],[17],[27]	$ 0	[11],[29],[30]
Cost		(519)	[12],[14],[17],[27]	(630)	[11],[29],[30]
Fair value		$ (519)	[12],[14],[17],[27]	$ (630)	[11],[29],[30]
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.31%	[12],[14],[17]	10.41%	[11],[29]
Reference Rate and Spread		6%	[12],[14],[17]	6%	[11],[29]
Principal		$ 17,512	[12],[14],[17]	$ 17,685	[11],[29]
Cost		17,242	[12],[14],[17]	17,381	[11],[29]
Fair value		$ 15,321	[12],[14],[17]	$ 15,479	[11],[29]
Investment, Identifier [Axis]: Vida Capital, Inc, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[11]			10.38%
Reference Rate and Spread	[11]			6%
Principal	[11]			$ 15,448
Cost	[11]			15,313
Fair value	[11]			$ 12,049
Investment, Identifier [Axis]: Vision Interests, Inc., Series A Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		3,000,000	[32]	3,000,000	[31]
Cost		$ 3,000	[32]	$ 3,000	[31]
Fair value		$ 3,000	[32]	$ 3,000	[31]	3,000		3,000
Investment, Identifier [Axis]: Vistar Media, Inc., Preferred Stock
Schedule of Investments [Line Items]
Units (in shares)		70,207	[5]	70,207	[6]
Cost		$ 767	[5]	$ 767	[6]
Fair value		$ 2,340	[5]	2,250	[6]
Investment, Identifier [Axis]: Volusion, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		1,802,780
Cost		$ 2,576
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)				4,876,670
Cost				$ 14,000
Fair value				0		$ 2,930		5,989
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Units (in shares)		4,876,670
Cost		$ 14,000
Fair value		$ 0		0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Units (in shares)		5,097,595
Cost		$ 11,446
Fair value		$ 10,740		0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 3
Schedule of Investments [Line Items]
Units (in shares)		142,512
Cost		$ 0
Fair value		$ 0		$ 0
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10%		11.50%	[38]	11.50%
Principal		$ 2,100		$ 16,734	[38]
Cost		2,100		16,734	[38]
Fair value		$ 2,100		14,914	[38]	$ 17,084		17,434
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10%
Fair value		$ 2,100		0
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Fair value		0		$ 14,914
Investment, Identifier [Axis]: Volusion, LLC, Unsecured Convertible Debt
Schedule of Investments [Line Items]
Total Rate				8%		8%
Principal				$ 409
Cost				409
Fair value		0		$ 0		$ 409		409
Investment, Identifier [Axis]: Volusion, LLC, Warrants
Schedule of Investments [Line Items]
Units (in shares)	[26]			1,831,355
Cost	[26]			$ 2,576
Fair value		$ 0		$ 0	[26]
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[11],[28],[29]			10.64%
Reference Rate and Spread	[11],[28],[29]			5.75%
Principal	[11],[28],[29]			$ 14,625
Cost	[11],[28],[29]			14,268
Fair value	[11],[28],[29]			$ 8,409
Investment, Identifier [Axis]: Wall Street Prep, Inc., Common Stock
Schedule of Investments [Line Items]
Units (in shares)		400,000	[5]	400,000	[6]
Cost		$ 400	[5]	$ 400	[6]
Fair value		$ 420	[5]	$ 420	[6]
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		7%	[5],[14],[17],[27]	7%	[6],[29],[30]
Principal		$ 0	[5],[14],[17],[27]	$ 0	[6],[29],[30]
Cost		(5)	[5],[14],[17],[27]	(6)	[6],[29],[30]
Fair value		$ (5)	[5],[14],[17],[27]	$ (6)	[6],[29],[30]
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.19%	[5],[14],[17]	10.74%	[6],[29]
Reference Rate and Spread		7%	[5],[14],[17]	7%	[6],[29]
Principal		$ 3,751	[5],[14],[17]	$ 4,235	[6],[29]
Cost		3,704	[5],[14],[17]	4,173	[6],[29]
Fair value		$ 3,747	[5],[14],[17]	$ 4,146	[6],[29]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.64%	[5],[14],[17],[77]	10.73%	[6],[29]
Reference Rate and Spread		6.25%	[5],[14],[17],[77]	6%	[6],[29]
Principal		$ 1,482	[5],[14],[17],[77]	$ 371	[6],[29]
Cost		1,450	[5],[14],[17],[77]	334	[6],[29]
Fair value		$ 1,482	[5],[14],[17],[77]	$ 370	[6],[29]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.64%	[5],[14],[17]	10.73%	[6],[29]
Reference Rate and Spread		6.25%	[5],[14],[17]	6%	[6],[29]
Principal		$ 389	[5],[14],[17]	$ 391	[6],[29]
Cost		363	[5],[14],[17]	361	[6],[29]
Fair value		$ 389	[5],[14],[17]	$ 391	[6],[29]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.64%	[5],[14],[17]	10.73%	[6],[29]
Reference Rate and Spread		6.25%	[5],[14],[17]	6%	[6],[29]
Principal		$ 28,811	[5],[14],[17]	$ 28,957	[6],[29]
Cost		28,493	[5],[14],[17]	28,591	[6],[29]
Fair value		$ 28,811	[5],[14],[17]	$ 28,947	[6],[29]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Common Stock
Schedule of Investments [Line Items]
Units (in shares)		1,541,400	[5]	1,541,400	[6]
Cost		$ 1,541	[5]	$ 1,541	[6]
Fair value		$ 2,390	[5]	$ 1,950	[6]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		6%	[5],[14],[17],[27]	6%	[6],[28],[29],[30]
Principal		$ 0	[5],[14],[17],[27]	$ 0	[6],[28],[29],[30]
Cost		(18)	[5],[14],[17],[27]	(20)	[6],[28],[29],[30]
Fair value		$ (18)	[5],[14],[17],[27]	$ (20)	[6],[28],[29],[30]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.79%	[5],[14],[17]	8.59%	[6],[28],[29]
Reference Rate and Spread		6%	[5],[14],[17]	6%	[6],[28],[29]
Principal		$ 10,712	[5],[14],[17]	$ 10,794	[6],[28],[29]
Cost		10,546	[5],[14],[17]	10,608	[6],[28],[29]
Fair value		$ 10,712	[5],[14],[17]	$ 10,685	[6],[28],[29]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 1
Schedule of Investments [Line Items]
Reference Rate and Spread		7%	[5],[14],[17],[27]	7%	[6],[29],[30]
Principal		$ 0	[5],[14],[17],[27]	$ 0	[6],[29],[30]
Cost		(30)	[5],[14],[17],[27]	(34)	[6],[29],[30]
Fair value		$ 0	[5],[14],[17],[27]	$ 0	[6],[29],[30]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[5],[14],[17]	12.55%
Reference Rate and Spread		7%	[5],[14],[17]	7%	[6],[29],[30]
Principal		$ 2,067	[5],[14],[17]	$ 0	[6],[29],[30]
Cost		2,030	[5],[14],[17]	(17)	[6],[29],[30]
Fair value		$ 2,030	[5],[14],[17]	$ (17)	[6],[29],[30]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.17%	[5],[14],[17]	10.74%	[6],[29]
Reference Rate and Spread		7%	[5],[14],[17]	7%	[6],[29]
Principal		$ 9,300	[5],[14],[17]	$ 10,000	[6],[29]
Cost		9,173	[5],[14],[17]	9,848	[6],[29]
Fair value		$ 9,300	[5],[14],[17]	$ 9,992	[6],[29]
Investment, Identifier [Axis]: World Micro Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Units (in shares)		3,845	[32]	3,845
Cost		$ 3,845	[32]	$ 3,845
Fair value		$ 3,845	[32]	$ 3,845
Investment, Identifier [Axis]: World Micro Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13%		13%
Principal		$ 14,280		$ 14,280
Cost		14,154		14,140
Fair value		$ 14,154		$ 14,140
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[5],[17]	10.41%
Reference Rate and Spread		5.25%	[5],[17]	5.25%	[6],[30]
Principal		$ 3,192	[5],[17]	$ 0	[6],[30]
Cost		3,002	[5],[17]	(218)	[6],[30]
Fair value		$ 3,192	[5],[17]	$ (218)	[6],[30]
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.58%	[5],[17]	10.84%	[6]
Reference Rate and Spread		5.25%	[5],[17]	5.25%	[6]
Principal		$ 24,239	[5],[17]	$ 24,300	[6]
Cost		23,848	[5],[17]	23,864	[6]
Fair value		$ 24,239	[5],[17]	$ 24,135	[6]
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.35%	[5],[17]	8.63%	[6]
Reference Rate and Spread		5.25%	[5],[17]	5.25%	[6]
Principal		$ 38,021	[5],[17]	$ 38,311	[6]
Cost		37,465	[5],[17]	37,691	[6]
Fair value		$ 38,021	[5],[17]	$ 38,051	[6]
Investment, Identifier [Axis]: YS Garments, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.59%	[12],[14],[17]	9.51%	[11],[29]
Reference Rate and Spread		7.50%	[12],[14],[17]	5.50%	[11],[29]
Principal		$ 12,378	[12],[14],[17]	$ 12,659	[11],[29]
Cost		12,119	[12],[14],[17]	12,619	[11],[29]
Fair value		$ 11,484	[12],[14],[17]	$ 12,127	[11],[29]
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Units (in shares)		10,072		10,072
Cost		$ 2,834		$ 2,834
Fair value		$ 70		$ 240		$ 1,680		2,130
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%
Principal		$ 450		$ 450
Cost		450		450
Fair value		$ 450		$ 450		$ 625		625
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		6.50%		6.50%		6.50%
Principal		$ 1,000		$ 1,000
Cost		1,000		1,000
Fair value		$ 945		$ 945		$ 1,000		1,000
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		14%		14%		14%
Principal		$ 2,750		$ 2,750
Cost		2,750		2,750
Fair value		$ 2,461		$ 2,676		$ 2,750		$ 2,750
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Warrants
Schedule of Investments [Line Items]
Units (in shares)		587	[25]	587	[26]
Cost		$ 600	[25]	$ 600	[26]
Fair value		$ 0	[25]	$ 0	[26]
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.50%	[5],[14],[17],[59]	11.67%	[6],[28],[29]
Reference Rate and Spread		7.25%	[5],[14],[17],[59]	7.25%	[6],[28],[29]
Principal		$ 17,424	[5],[14],[17],[59]	$ 17,512	[6],[28],[29]
Cost		17,291	[5],[14],[17],[59]	17,279	[6],[28],[29]
Fair value		$ 17,277	[5],[14],[17],[59]	$ 17,512	[6],[28],[29]
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.46%	[5],[14],[17],[59]	11.67%	[6],[28],[29],[76]
Reference Rate and Spread		7.25%	[5],[14],[17],[59]	7.25%	[6],[28],[29],[76]
Principal		$ 4,367	[5],[14],[17],[59]	$ 4,389	[6],[28],[29],[76]
Cost		4,351	[5],[14],[17],[59]	4,360	[6],[28],[29],[76]
Fair value		$ 4,309	[5],[14],[17],[59]	$ 4,379	[6],[28],[29],[76]

[1]Principal is net of repayments. Cost is net of repayments and accumulated unearned income. Negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.[2]Principal is net of repayments. Cost is net of repayments and accumulated unearned income. Negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.[3] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Private Loan portfolio investments. Private Loan portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Private Loan portfolio investments. Other Portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Other Portfolio investments. Other Portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Other Portfolio investments. Middle Market portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Middle Market portfolio investments. Middle Market portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Middle Market portfolio investments. Short-term portfolio investments. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of short-term portfolio investments.

Consolidated Schedule of Inve_2

Consolidated Schedule of Investments (Parenthetical) $ in Thousands, $ in Millions		6 Months Ended		9 Months Ended	12 Months Ended
		Jun. 30, 2023 USD ($) $ / shares		Sep. 30, 2022 $ / shares	Dec. 31, 2022 USD ($) $ / shares		Jun. 30, 2023 CAD ($)		Dec. 31, 2022 CAD ($)		Jun. 30, 2022
Schedule of Investments [Line Items]
Percentage of loans with variable rate floors		91%			66%		91%		66%
Strike price (in dollars per share) \| $ / shares		$ 0.01			$ 0.01
SI East, LLC
Schedule of Investments [Line Items]
Interest rate		11.25%					11.25%
MB2 Dental Solutions, LLC
Schedule of Investments [Line Items]
Floor rate		1%					1%
Various Investment 1
Schedule of Investments [Line Items]
Floor rate					1%				1%
Various Investments 2
Schedule of Investments [Line Items]
Floor rate		1%					1%
Computer Data Source, LLC
Schedule of Investments [Line Items]
Floor rate		1%			1%		1%		1%
Dalton US Inc.
Schedule of Investments [Line Items]
Floor rate		1%					1%
GULF PACIFIC ACQUISITION, LLC
Schedule of Investments [Line Items]
Floor rate		1%					1%
Various Investments 3
Schedule of Investments [Line Items]
Floor rate		1%					1%
NWN Corporation
Schedule of Investments [Line Items]
Floor rate		1%			1%		1%		1%
Watterson Brands, LLC
Schedule of Investments [Line Items]
Floor rate		1%					1%
Bolder Panther Group, LLC
Schedule of Investments [Line Items]
Floor rate		1.50%			1.50%		1.50%		1.50%
Arrow International, Inc
Schedule of Investments [Line Items]
Floor rate					1%				1%
Channel Partners Intermediateco, LLC
Schedule of Investments [Line Items]
Floor rate					1%				1%
Cadence Aerospace LLC
Schedule of Investments [Line Items]
Floor rate					1%				1%
PIK Rate					2%				2%
IG Parent Corporation
Schedule of Investments [Line Items]
Floor rate					1%				1%
Channel Partners Intermediateco, LLC
Schedule of Investments [Line Items]
Floor rate					1%				1%
Mako Steel, LP
Schedule of Investments [Line Items]
Floor rate					0.75%				0.75%
Paragon Healthcare, Inc.
Schedule of Investments [Line Items]
Floor rate					1%				1%
RTIC Subsidiary Holdings, LLC
Schedule of Investments [Line Items]
Floor rate					1.25%				1.25%
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt
Schedule of Investments [Line Items]
Principal	[1]				$ 11,726
Interest rate					18%	[1]			18%	[1]	18%
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Principal	[2]	$ 381
Interest rate	[2]	18%					18%
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Principal	[2]	$ 12,848
Interest rate	[2]	18%					18%
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5%	[3],[4],[5]		6%	[6],[7],[8],[9]	5%	[3],[4],[5]	6%	[6],[7],[8],[9]
Principal		$ 0	[3],[4],[5]		$ 0	[6],[7],[8],[9]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[5],[10]		6%	[6],[7],[8]	6%	[3],[4],[5],[10]	6%	[6],[7],[8]
Principal		$ 0	[3],[4],[5],[10]		$ 741	[6],[7],[8]
Interest rate	[6],[7],[8]				10.20%				10.20%
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[10]		6%	[6],[7],[8]	6%	[3],[4],[10]	6%	[6],[7],[8]
Principal		$ 21,296	[3],[4],[10]		$ 17,052	[6],[7],[8]
Interest rate		11.20%	[3],[4],[10]		10.58%	[6],[7],[8]	11.20%	[3],[4],[10]	10.58%	[6],[7],[8]
Investment, Identifier [Axis]: ADS Tactical, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.75%	[2],[4],[10]		5.75%	[1],[8]	5.75%	[2],[4],[10]	5.75%	[1],[8]
Principal		$ 20,424	[2],[4],[10]		$ 21,077	[1],[8]
Interest rate		10.94%	[2],[4],[10]		10.14%	[1],[8]	10.94%	[2],[4],[10]	10.14%	[1],[8]
Investment, Identifier [Axis]: AFG Capital Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Interest rate											10%
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.40%	[3],[4],[5],[10]		7.40%	[6],[7],[8],[9]	7.40%	[3],[4],[5],[10]	7.40%	[6],[7],[8],[9]
Principal		$ 0	[3],[4],[5],[10]		$ 0	[6],[7],[8],[9]
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.40%	[3],[4],[10]		7.40%	[6],[7],[8]	7.40%	[3],[4],[10]	7.40%	[6],[7],[8]
Principal		$ 37,264	[3],[4],[10]		$ 37,491	[6],[7],[8]
Interest rate		12.70%	[3],[4],[10]		11.72%	[6],[7],[8]	12.70%	[3],[4],[10]	11.72%	[6],[7],[8]
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 400			$ 400
Interest rate		13%			13%		13%		13%		13%
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 1,650			$ 1,650
Interest rate		13%			13%		13%		13%		13%
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[10]		5.50%	[6],[7],[8],[9]	6.50%	[3],[4],[10]	5.50%	[6],[7],[8],[9]
Principal		$ 720	[3],[4],[10]		$ 0	[6],[7],[8],[9]
Interest rate	[3],[4],[10]	11.75%					11.75%
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		5.50%	[3],[4],[10]		5.50%	[6],[7],[8]	5.50%	[3],[4],[10]	5.50%	[6],[7],[8]
Principal		$ 6,660	[3],[4],[10]		$ 6,660	[6],[7],[8]
Interest rate		10.65%	[3],[4],[10]		9.32%	[6],[7],[8]	10.65%	[3],[4],[10]	9.32%	[6],[7],[8]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[10]		7.50%	[6],[7],[8]	7.50%	[3],[4],[10]	7.50%	[6],[7],[8]
Principal		$ 6,660	[3],[4],[10]		$ 6,660	[6],[7],[8]
Interest rate		12.65%	[3],[4],[10]		11.32%	[6],[7],[8]	12.65%	[3],[4],[10]	11.32%	[6],[7],[8]
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt
Schedule of Investments [Line Items]
Interest rate											5%
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 2,027	[3],[11]		$ 1,901	[6],[12]
Interest rate		5%	[3],[11]		5%	[6],[12]	5%	[3],[11]	5%	[6],[12]
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 3,015	[3],[11]		$ 3,015	[6],[12]
Interest rate		5%	[3],[11]		5%	[6],[12]	5%	[3],[11]	5%	[6],[12]
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt
Schedule of Investments [Line Items]
Variable rate		7.50%			7.50%	[1],[8]	7.50%		7.50%	[1],[8]	7.50%
Principal	[1],[8]				$ 6,783
Interest rate					12.23%	[1],[8]			12.23%	[1],[8]	8.92%
Investment, Identifier [Axis]: ATX Networks Corp., Unsecured Debt
Schedule of Investments [Line Items]
Principal	[1]				$ 3,396
Interest rate					10%	[1]			10%	[1]	10%
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4],[10]		7.25%	[6],[7],[8],[9]	7.25%	[3],[4],[10]	7.25%	[6],[7],[8],[9]
Principal		$ 1,474	[3],[4],[10]		$ 0	[6],[7],[8],[9]
Interest rate	[3],[4],[10]	12.63%					12.63%
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4],[10]		7.25%	[6],[7],[8]	7.25%	[3],[4],[10]	7.25%	[6],[7],[8]
Principal		$ 19,346	[3],[4],[10]		$ 29,071	[6],[7],[8]
Interest rate		12.65%	[3],[4],[10]		12.17%	[6],[7],[8]	12.65%	[3],[4],[10]	12.17%	[6],[7],[8]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4]		8.50%	[6],[8]	7.50%	[3],[4]	8.50%	[6],[8]
Principal		$ 1,678	[3],[4]		$ 1,678	[6],[8]
Interest rate		15.75%	[3],[4]		13.23%	[6],[8]	15.75%	[3],[4]	13.23%	[6],[8]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4]		8.50%	[6],[8]	7.50%	[3],[4]	8.50%	[6],[8]
Principal		$ 9,620	[3],[4]		$ 9,891	[6],[8]
Interest rate		15.75%	[3],[4]		13.23%	[6],[8]	15.75%	[3],[4]	13.23%	[6],[8]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		11.50%	[3],[4]		12.50%	[6],[8]	11.50%	[3],[4]	12.50%	[6],[8]
Principal		$ 785	[3],[4]		$ 807	[6],[8]
Interest rate		19.75%	[3],[4]		16.17%	[6],[8]	19.75%	[3],[4]	16.17%	[6],[8]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[5],[10]		9.50%	[6],[8]	7.50%	[3],[4],[5],[10]	9.50%	[6],[8]
Principal		$ 0	[3],[4],[5],[10]		$ 14,618	[6],[8]
Interest rate	[6],[8]				13.88%				13.88%
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[10]		9%	[6],[8]	7.50%	[3],[4],[10]	9%	[6],[8]
Principal		$ 43,656	[3],[4],[10]		$ 4,368	[6],[8]
Interest rate		12.85%	[3],[4],[10]		13.57%	[6],[8]	12.85%	[3],[4],[10]	13.57%	[6],[8]
Investment, Identifier [Axis]: Acumera, Inc., Warrants
Schedule of Investments [Line Items]
Strike price (in dollars per share) \| $ / shares		$ 1
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[10],[13]		6%	[6],[8],[14]	7%	[3],[4],[10],[13]	6%	[6],[8],[14]
Principal		$ 7,094	[3],[4],[10],[13]		$ 4,729	[6],[8],[14]
Interest rate		10%	[3],[4],[10],[13]		10%	[6],[8],[14]	10%	[3],[4],[10],[13]	10%	[6],[8],[14]
Interest rate					2.50%				2.50%
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[10],[13]		7.50%	[6],[8],[14]	7%	[3],[4],[10],[13]	7.50%	[6],[8],[14]
Principal		$ 22,383	[3],[4],[10],[13]		$ 24,086	[6],[8],[14]
Interest rate		10%	[3],[4],[10],[13]		10%	[6],[8],[14]	10%	[3],[4],[10],[13]	10%	[6],[8],[14]
Interest rate					2.50%				2.50%
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[5]		6%	[6],[8],[9]	6%	[3],[4],[5]	6%	[6],[8],[9]
Principal		$ 0	[3],[4],[5]		$ 0	[6],[8],[9]
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4]		6%	[6],[8]	6%	[3],[4]	6%	[6],[8]
Principal		$ 6,583	[3],[4]		$ 6,617	[6],[8]
Interest rate		11.43%	[3],[4]		11.12%	[6],[8]	11.43%	[3],[4]	11.12%	[6],[8]
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.75%	[3],[4],[10]		6.75%	[6],[7],[8]	6.75%	[3],[4],[10]	6.75%	[6],[7],[8]
Principal		$ 14,800	[3],[4],[10]		$ 15,628	[6],[7],[8]
Interest rate		11.79%	[3],[4],[10]		10.46%	[6],[7],[8]	11.79%	[3],[4],[10]	10.46%	[6],[7],[8]
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		8.75%	[3],[4],[10],[11]		8.75%	[6],[7],[8]	8.75%	[3],[4],[10],[11]	8.75%	[6],[7],[8]
Principal		$ 14,800	[3],[4],[10],[11]		$ 15,628	[6],[7],[8]
Interest rate		14.79%	[3],[4],[10],[11]		12.46%	[6],[7],[8]	14.79%	[3],[4],[10],[11]	12.46%	[6],[7],[8]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[2],[11],[15]		6.50%	[1],[12]	6.50%	[2],[11],[15]	6.50%	[1],[12]
Principal		$ 2,980	[2],[11],[15]		$ 2,980	[1],[12]
Interest rate		7.50%	[2],[11],[15]		7.50%	[1],[12]	7.50%	[2],[11],[15]	7.50%	[1],[12]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.50%	[2],[4],[11],[15]		6.50%	[1],[8],[12]	6.50%	[2],[4],[11],[15]	6.50%	[1],[8],[12]
Principal		$ 14,370	[2],[4],[11],[15]		$ 14,370	[1],[8],[12]
Interest rate		7.50%	[2],[4],[11],[15]		7.50%	[1],[8],[12]	7.50%	[2],[4],[11],[15]	7.50%	[1],[8],[12]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Interest rate		14.13%			14.13%		14.13%		14.13%
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											10%
Interest rate											12%
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		10%	[4],[5]		10%	[8],[9]	10%	[4],[5]	10%	[8],[9]
Principal		$ 0	[4],[5]		$ 0	[8],[9]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		10%	[4]		10%	[8]	10%	[4]	10%	[8]
Principal		$ 4,525	[4]		$ 4,665	[8]
Interest rate		15.25%	[4]		14.13%	[8]	15.25%	[4]	14.13%	[8]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[10]		9%	[6],[8]	7%	[3],[4],[10]	9%	[6],[8]
Principal		$ 4,928	[3],[4],[10]		$ 4,678	[6],[8]
Interest rate		15.25%	[3],[4],[10]		13.41%	[6],[8]	15.25%	[3],[4],[10]	13.41%	[6],[8]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[10]		9%	[6],[8]	7%	[3],[4],[10]	9%	[6],[8]
Principal		$ 29,789	[3],[4],[10]		$ 29,722	[6],[8]
Interest rate		15.23%	[3],[4],[10]		13.56%	[6],[8]	15.23%	[3],[4],[10]	13.56%	[6],[8]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[5],[10]		6.50%	[6],[7],[8],[9]	6%	[3],[4],[5],[10]	6.50%	[6],[7],[8],[9]
Principal		$ 0	[3],[4],[5],[10]		$ 0	[6],[7],[8],[9]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[10]		6.50%	[6],[7],[8]	6%	[3],[4],[10]	6.50%	[6],[7],[8]
Principal		$ 53,233	[3],[4],[10]		$ 67,597	[6],[7],[8]
Interest rate		11.39%	[3],[4],[10]		10.92%	[6],[7],[8]	11.39%	[3],[4],[10]	10.92%	[6],[7],[8]
Investment, Identifier [Axis]: Arrow International, Inc, Secured Debt
Schedule of Investments [Line Items]
Variable rate	[6],[7],[8],[16]				6.60%				6.60%
Principal	[6],[7],[8],[16]				$ 36,000
Interest rate	[6],[7],[8],[16]				10.36%				10.36%
Investment, Identifier [Axis]: BBB Tank Services, LLC, Preferred Stock (non-voting)
Schedule of Investments [Line Items]
Interest rate		15%			15%		15%		15%
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt
Schedule of Investments [Line Items]
Variable rate											11%
Interest rate											12.06%
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 1
Schedule of Investments [Line Items]
Variable rate		11%	[4],[15]		11%	[8],[17]	11%	[4],[15]	11%	[8],[17]
Principal		$ 800	[4],[15]		$ 800	[8],[17]
Interest rate		16.17%	[4],[15]		15.12%	[8],[17]	16.17%	[4],[15]	15.12%	[8],[17]
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 2
Schedule of Investments [Line Items]
Variable rate		11%	[4],[15]		11%	[8],[17]	11%	[4],[15]	11%	[8],[17]
Principal		$ 4,000	[4],[15]		$ 4,000	[8],[17]
Interest rate		16.17%	[4],[15]		15.12%	[8],[17]	16.17%	[4],[15]	15.12%	[8],[17]
Investment, Identifier [Axis]: Barfly Ventures, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 711	[3]		$ 711	[6]
Interest rate		7%	[3]		7%	[6]	7%	[3]	7%	[6]	7%
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt
Schedule of Investments [Line Items]
Interest rate											11%
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 0	[5]		$ 0	[9]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 10,575			0	[9]
Interest rate		10%					10%
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Principal					$ 11,025
Interest rate		10%			11%		10%		11%
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 1
Schedule of Investments [Line Items]
Interest rate	[6],[18],[19]				8%				8%
Investment, Identifier [Axis]: Berry Aviation, Inc., Secured Debt
Schedule of Investments [Line Items]
Principal	[6]				$ 195
Interest rate	[6]				12%				12%
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[5],[10]		1%	[6],[7],[8],[9]	7%	[3],[4],[5],[10]	1%	[6],[7],[8],[9]
Principal		$ 0	[3],[4],[5],[10]		$ 0	[6],[7],[8],[9]
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[10]		1%	[6],[7],[8]	7%	[3],[4],[10]	1%	[6],[7],[8]
Principal		$ 28,345	[3],[4],[10]		$ 27,505	[6],[7],[8]
Interest rate		12.26%	[3],[4],[10]		11.40%	[6],[7],[8]	12.26%	[3],[4],[10]	11.40%	[6],[7],[8]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[2],[4]		8.50%	[1],[8],[9]	7.50%	[2],[4]	8.50%	[1],[8],[9]
Principal		$ 1,418	[2],[4]		$ 0	[1],[8],[9]
Interest rate	[2],[4]	15.75%					15.75%
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		8.50%	[2],[4],[10]		8.50%	[1],[8]	8.50%	[2],[4],[10]	8.50%	[1],[8]
Principal		$ 3,415	[2],[4],[10]		$ 3,239	[1],[8]
Interest rate		13.77%	[2],[4],[10]		12.94%	[1],[8]	13.77%	[2],[4],[10]	12.94%	[1],[8]
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 320			$ 320
Interest rate		10%			10%		10%		10%		10%
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class B Preferred Member Units
Schedule of Investments [Line Items]
Interest rate		8%	[20]		8%	[18]	8%	[20]	8%	[18]
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		9.19%	[4],[10],[21]		9.26%	[7],[8],[22]	9.19%	[4],[10],[21]	9.26%	[7],[8],[22]	9%
Principal		$ 97,875	[4],[10],[21]		$ 99,194	[7],[8],[22]
Interest rate		14.37%	[4],[10],[21]		13.39%	[7],[8],[22]	14.37%	[4],[10],[21]	13.39%	[7],[8],[22]	10.50%
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		9.19%					9.19%
Interest rate		14.37%					14.37%
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[3],[4],[5],[10],[23],[24]	7%					7%
Principal	[3],[4],[5],[10],[23],[24]	$ 0
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[3],[4],[10],[23],[24]	6%					6%
Principal	[3],[4],[10],[23],[24]	$ 6,421
Interest rate	[3],[4],[10],[23],[24]	11.19%					11.19%
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate	[3],[4],[10],[23],[24]	8%					8%
Principal	[3],[4],[10],[23],[24]	$ 6,421
Interest rate	[3],[4],[10],[23],[24]	13.19%					13.19%
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		9.25%	[3],[4],[11],[15]		9.25%	[6],[8],[12],[17]	9.25%	[3],[4],[11],[15]	9.25%	[6],[8],[12],[17]
Principal		$ 761	[3],[4],[11],[15]		$ 761	[6],[8],[12],[17]
Interest rate		12.50%	[3],[4],[11],[15]		12.50%	[6],[8],[12],[17]	12.50%	[3],[4],[11],[15]	12.50%	[6],[8],[12],[17]
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		9.25%	[3],[4],[11],[15]		9.25%	[6],[8],[12],[17]	9.25%	[3],[4],[11],[15]	9.25%	[6],[8],[12],[17]
Principal		$ 7,056	[3],[4],[11],[15]		$ 7,056	[6],[8],[12],[17]
Interest rate		12.50%	[3],[4],[11],[15]		12.50%	[6],[8],[12],[17]	12.50%	[3],[4],[11],[15]	12.50%	[6],[8],[12],[17]
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		10%	[4]		10%	[8]	10%	[4]	10%	[8]	10%
Principal		$ 5,716	[4]		$ 5,964	[8]
Interest rate		15.17%	[4]		14.12%	[8]	15.17%	[4]	14.12%	[8]	11.06%
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 8,813			$ 8,813
Interest rate		13%			13%		13%		13%		13%
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 1,000	[25]		$ 1,000	[19]
Interest rate		13%	[25]		13%	[19]	13%	[25]	13%	[19]	13%
Investment, Identifier [Axis]: Buca C, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Interest rate		6%			6%		6%		6%
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											9.25%
Principal		$ 16,980			$ 17,355
Interest rate		12%			9%		12%		9%		10.37%
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5%	[3],[4],[10]		5%	[6],[8],[9]	5%	[3],[4],[10]	5%	[6],[8],[9]
Principal		$ 774	[3],[4],[10]		$ 0	[6],[8],[9]
Interest rate	[3],[4],[10]	10.20%					10.20%
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		5%	[3],[4],[10]		5%	[6],[8]	5%	[3],[4],[10]	5%	[6],[8]
Principal		$ 19,782	[3],[4],[10]		$ 19,933	[6],[8]
Interest rate		10.20%	[3],[4],[10]		8.91%	[6],[8]	10.20%	[3],[4],[10]	8.91%	[6],[8]
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate	[6],[8],[26]				8.50%				8.50%
Principal	[6],[8],[26]				$ 28,328
Interest rate	[6],[8],[26]				11.99%				11.99%
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[3],[4],[10]	6.50%					6.50%
Principal	[3],[4],[10]	$ 5,044
Interest rate	[3],[4],[10]	13.91%					13.91%
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[3],[4],[10]	6.50%					6.50%
Principal	[3],[4],[10]	$ 1,569
Interest rate	[3],[4],[10]	13.91%					13.91%
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate	[3],[4],[10]	6.50%					6.50%
Principal	[3],[4],[10]	$ 2,064
Interest rate	[3],[4],[10]	13.91%					13.91%
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 4
Schedule of Investments [Line Items]
Variable rate	[3],[4],[10]	6.50%					6.50%
Principal	[3],[4],[10]	$ 594
Interest rate	[3],[4],[10]	13.91%					13.91%
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Interest rate											15%
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Interest rate		15%	[20]		15%	[18]	15%	[20]	15%	[18]
Investment, Identifier [Axis]: California Splendor Holdings LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		10%	[4]		10%	[8]	10%	[4]	10%	[8]	10%
Principal		$ 28,000	[4]		$ 28,000	[8]
Interest rate		15.25%	[4]		13.75%	[8]	15.25%	[4]	13.75%	[8]	11%
Investment, Identifier [Axis]: Camin Cargo Control, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate		6.50%	[2],[4],[10]		6.50%	[1],[8]	6.50%	[2],[4],[10]	6.50%	[1],[8]
Principal		$ 15,138	[2],[4],[10]		$ 15,218	[1],[8]
Interest rate		11.72%	[2],[4],[10]		10.88%	[1],[8]	11.72%	[2],[4],[10]	10.88%	[1],[8]
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Interest rate											12.50%
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[4]		6%	[8],[9]	6%	[4]	6%	[8],[9]
Principal		$ 450	[4]		$ 0	[8],[9]
Interest rate	[4]	11.25%					11.25%
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 20,250			$ 20,250
Interest rate		12.50%			12.50%		12.50%		12.50%
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[5],[10]		6%	[6],[8],[9]	6%	[3],[4],[5],[10]	6%	[6],[8],[9]
Principal		$ 0	[3],[4],[5],[10]		$ 0	[6],[8],[9]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[10]		6%	[6],[8]	6%	[3],[4],[10]	6%	[6],[8]
Principal		$ 7,973	[3],[4],[10]		$ 7,993	[6],[8]
Interest rate		11.54%	[3],[4],[10]		10.73%	[6],[8]	11.54%	[3],[4],[10]	10.73%	[6],[8]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[10]		5.75%	[6],[8]	6%	[3],[4],[10]	5.75%	[6],[8]
Principal		$ 6,133	[3],[4],[10]		$ 6,133	[6],[8]
Interest rate		11.54%	[3],[4],[10]		10.48%	[6],[8]	11.54%	[3],[4],[10]	10.48%	[6],[8]
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											10%
Interest rate											12%
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		9%	[4],[5]		9%	[8],[9]	9%	[4],[5]	9%	[8],[9]
Principal		$ 0	[4],[5]		$ 0	[8],[9]
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		9%	[4]		9%	[8]	9%	[4]	9%	[8]
Principal		$ 15,030	[4]		$ 15,030	[8]
Interest rate		14.25%	[4]		13.13%	[8]	14.25%	[4]	13.13%	[8]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											8%
Interest rate											9.13%
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[4],[5],[10]		6%	[8],[9]	6%	[4],[5],[10]	6%	[8],[9]
Principal		$ 0	[4],[5],[10]		$ 0	[8],[9]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		8%	[4],[10]		8%	[8]	8%	[4],[10]	8%	[8]
Principal		$ 16,407	[4],[10]		$ 16,945	[8]
Interest rate		13.36%	[4],[10]		12.13%	[8]	13.36%	[4],[10]	12.13%	[8]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[10],[27]		6.25%	[6],[7],[8],[28]	6.25%	[3],[4],[10],[27]	6.25%	[6],[7],[8],[28]
Principal		$ 3,940	[3],[4],[10],[27]		$ 1,868	[6],[7],[8],[28]
Interest rate		11.51%	[3],[4],[10],[27]		10.72%	[6],[7],[8],[28]	11.51%	[3],[4],[10],[27]	10.72%	[6],[7],[8],[28]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[10],[27]		6.25%	[6],[7],[8],[29]	6.25%	[3],[4],[10],[27]	6.25%	[6],[7],[8],[29]
Principal		$ 38,735	[3],[4],[10],[27]		$ 39,047	[6],[7],[8],[29]
Interest rate		11.39%	[3],[4],[10],[27]		10.71%	[6],[7],[8],[29]	11.39%	[3],[4],[10],[27]	10.71%	[6],[7],[8],[29]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate	[3],[4],[10]	6.25%					6.25%
Principal	[3],[4],[10]	$ 4,914
Interest rate	[3],[4],[10]	11.39%					11.39%
Investment, Identifier [Axis]: Charps, LLC, Unsecured Debt
Schedule of Investments [Line Items]
Principal		$ 5,694			$ 5,694
Interest rate		10%			10%		10%		10%		10%
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate					9%	[7],[8],[9]			9%	[7],[8],[9]	9.50%
Principal		$ 0	[5]		$ 0	[7],[8],[9]
Interest rate											10.63%
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[7],[8]				9%				9%
Principal		$ 9,720			$ 10,480	[7],[8]
Interest rate		11.50%			13.23%	[7],[8]	11.50%		13.23%	[7],[8]	10%
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Principal		$ 1,031			$ 1,049
Interest rate		10%			10%		10%		10%
Investment, Identifier [Axis]: Clarius BIGS, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 2,696	[3],[11],[15]		$ 2,712	[6],[12],[17]
Interest rate		15%	[3],[11],[15]		15%	[6],[12],[17]	15%	[3],[11],[15]	15%	[6],[12],[17]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[4]		6%	[8]	6%	[4]	6%	[8]	6%
Principal		$ 4,560	[4]		$ 4,560	[8]
Interest rate		11.25%	[4]		9.75%	[8]	11.25%	[4]	9.75%	[8]	7%
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 19,274			$ 19,274
Interest rate		8%			8%		8%		8%		8%
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate											10.50%
Interest rate											12.25%
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[8]				10.50%				10.50%
Principal		$ 0	[5]		$ 1,462	[8]
Interest rate	[8]				15.38%				15.38%
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[8]				10.50%				10.50%
Principal		$ 46,312			$ 40,801	[8]
Interest rate		12.50%			15.38%	[8]	12.50%		15.38%	[8]
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		10.50%					10.50%
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 4
Schedule of Investments [Line Items]
Variable rate		10.50%					10.50%
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt
Schedule of Investments [Line Items]
Interest rate											12%
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 0	[5]		$ 0	[9]
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 22,680			$ 23,310
Interest rate		12%			12%		12%		12%
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		9%	[4]				9%	[4]			9%
Principal	[4]	$ 4,869
Interest rate		14.25%	[4]				14.25%	[4]			10.13%
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		9%			9%	[8],[9],[17]	9%		9%	[8],[9],[17]
Principal	[8],[9],[17]				$ 0
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		9%			9%	[8]	9%		9%	[8]
Principal	[8]				$ 5,241
Interest rate		14.25%			13.13%	[8]	14.25%		13.13%	[8]
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[30]		8%	[6],[8],[31]	7.50%	[3],[4],[30]	8%	[6],[8],[31]
Principal		$ 5,000	[3],[4],[30]		$ 5,000	[6],[8],[31]
Interest rate		12.71%	[3],[4],[30]		12.56%	[6],[8],[31]	12.71%	[3],[4],[30]	12.56%	[6],[8],[31]
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4]		8%	[6],[8]	7.50%	[3],[4]	8%	[6],[8]
Principal		$ 18,450	[3],[4]		$ 18,588	[6],[8]
Interest rate		12.82%	[3],[4]		12.56%	[6],[8]	12.82%	[3],[4]	12.56%	[6],[8]
Investment, Identifier [Axis]: Cybermedia Technologies, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal	[5]	$ 0
Investment, Identifier [Axis]: Cybermedia Technologies, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 29,000
Interest rate		13%					13%
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 20,000			$ 21,200
Interest rate		12%			12%		12%		12%		12%
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class A Preferred Member Units
Schedule of Investments [Line Items]
Interest rate		8%	[3]		8%	[6]	8%	[3]	8%	[6]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class AA Preferred Member Units (non-voting)
Schedule of Investments [Line Items]
Interest rate		10%	[3],[20]		10%	[6],[18]	10%	[3],[20]	10%	[6],[18]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[6],[8],[9]				7.50%				7.50%
Principal	[6],[8],[9]				$ 0
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[6],[8]				7.50%				7.50%
Principal	[6],[8]				$ 6,074
Interest rate	[6],[8]				12.24%				12.24%
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		8.50%	[3],[4],[10],[32]		8%	[6],[7],[8]	8.50%	[3],[4],[10],[32]	8%	[6],[7],[8]
Principal		$ 3,614	[3],[4],[10],[32]		$ 1,092	[6],[7],[8]
Interest rate		13.69%	[3],[4],[10],[32]		11.90%	[6],[7],[8]	13.69%	[3],[4],[10],[32]	11.90%	[6],[7],[8]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		8.50%	[3],[4],[5],[10]		8%	[6],[7],[8],[9]	8.50%	[3],[4],[5],[10]	8%	[6],[7],[8],[9]
Principal		$ 0	[3],[4],[5],[10]		$ 0	[6],[7],[8],[9]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		8.50%	[3],[4],[10]		8%	[6],[7],[8]	8.50%	[3],[4],[10]	8%	[6],[7],[8]
Principal		$ 14,270	[3],[4],[10]		$ 14,389	[6],[7],[8]
Interest rate		13.69%	[3],[4],[10]		12.56%	[6],[7],[8]	13.69%	[3],[4],[10]	12.56%	[6],[7],[8]
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt
Schedule of Investments [Line Items]
Interest rate											7.50%
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 720			$ 223
Interest rate		7.50%			7.50%		7.50%		7.50%
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 8,487			$ 8,622
Interest rate		10%			7.50%		10%		7.50%
Investment, Identifier [Axis]: Digital Products Holdings LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		10%	[4],[10]		10%	[8]	10%	[4],[10]	10%	[8]	10%
Principal		$ 14,873	[4],[10]		$ 15,533	[8]
Interest rate		15.25%	[4],[10]		14.13%	[8]	15.25%	[4],[10]	14.13%	[8]	11.13%
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate											11%
Interest rate											12.13%
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[8],[9]				11%				11%
Principal		$ 0	[5]		$ 0	[8],[9]
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[8]				11%				11%
Principal		$ 26,465			$ 27,267	[8]
Interest rate		13%			15.13%	[8]	13%		15.13%	[8]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[6],[7],[8]				4.50%				4.50%
Principal		$ 1	[3]		$ 1,875	[6],[7],[8]
Interest rate	[6],[7],[8]				9.18%				9.18%
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		4.50%	[3],[4],[10]		6.50%	[6],[7],[8]	4.50%	[3],[4],[10]	6.50%	[6],[7],[8]
Principal		$ 1,957	[3],[4],[10]		$ 1,875	[6],[7],[8]
Interest rate		9.70%	[3],[4],[10]		11.18%	[6],[7],[8]	9.70%	[3],[4],[10]	11.18%	[6],[7],[8]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate	[3],[4],[10]	6.50%					6.50%
Principal	[3],[4],[10]	$ 1,972
Interest rate	[3],[4],[10]	11.70%					11.70%
Investment, Identifier [Axis]: EPIC Y-Grade Services, LP, Secured Debt
Schedule of Investments [Line Items]
Variable rate		6%	[2],[4],[10]		6%	[1],[8]	6%	[2],[4],[10]	6%	[1],[8]
Principal		$ 6,788	[2],[4],[10]		$ 6,823	[1],[8]
Interest rate		11.36%	[2],[4],[10]		10.70%	[1],[8]	11.36%	[2],[4],[10]	10.70%	[1],[8]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		8%	[3],[4],[10]		7%	[6],[8]	8%	[3],[4],[10]	7%	[6],[8]
Principal		$ 3,346	[3],[4],[10]		$ 3,346	[6],[8]
Interest rate		13.39%	[3],[4],[10]		11.73%	[6],[8]	13.39%	[3],[4],[10]	11.73%	[6],[8]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		8%	[3],[4],[10]		7%	[6],[8]	8%	[3],[4],[10]	7%	[6],[8]
Principal		$ 4,827	[3],[4],[10]		$ 5,021	[6],[8]
Interest rate		13.39%	[3],[4],[10]		11.73%	[6],[8]	13.39%	[3],[4],[10]	11.73%	[6],[8]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		8%	[3],[4],[10]		7%	[6],[8]	8%	[3],[4],[10]	7%	[6],[8]
Principal		$ 22,549	[3],[4],[10]		$ 23,456	[6],[8]
Interest rate		13.39%	[3],[4],[10]		11.73%	[6],[8]	13.39%	[3],[4],[10]	11.73%	[6],[8]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[4],[5],[10]		6%	[7],[8],[9]	6%	[4],[5],[10]	6%	[7],[8],[9]
Principal		$ 0	[4],[5],[10]		$ 0	[7],[8],[9]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 18,773			$ 18,773
Interest rate		12%			12%		12%		12%
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Principal		$ 6,335			$ 6,357
Interest rate		9%			9%		9%		9%
Investment, Identifier [Axis]: Emerald Technologies Acquisition Co, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate		6.25%	[2],[4],[10]		6.25%	[1],[7],[8]	6.25%	[2],[4],[10]	6.25%	[1],[7],[8]
Principal		$ 9,141	[2],[4],[10]		$ 9,258	[1],[7],[8]
Interest rate		11.66%	[2],[4],[10]		10.67%	[1],[7],[8]	11.66%	[2],[4],[10]	10.67%	[1],[7],[8]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund IX, L.P.)
Schedule of Investments [Line Items]
Interest rate	[18],[33],[34],[35]				0.10%				0.10%
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII Co-Investors, L.P.)
Schedule of Investments [Line Items]
Interest rate	[18],[33],[34],[35]				0.38%				0.38%
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII, L.P.)
Schedule of Investments [Line Items]
Interest rate	[18],[33],[34],[35]				0.14%				0.14%
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund X, L.P.)
Schedule of Investments [Line Items]
Interest rate	[18],[33],[34],[35]				0.15%				0.15%
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund II, L.P.)
Schedule of Investments [Line Items]
Interest rate	[33],[34],[35]				0.84%				0.84%
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund III, L.P.)
Schedule of Investments [Line Items]
Interest rate	[18],[33],[34],[35]				0.25%				0.25%
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5.50%	[3],[4]		6.50%	[6],[7],[8]	5.50%	[3],[4]	6.50%	[6],[7],[8]
Principal		$ 655	[3],[4]		$ 131	[6],[7],[8]
Interest rate		13.75%	[3],[4]		11.68%	[6],[7],[8]	13.75%	[3],[4]	11.68%	[6],[7],[8]
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[10]		6.50%	[6],[7],[8]	6.50%	[3],[4],[10]	6.50%	[6],[7],[8]
Principal		$ 16,216	[3],[4],[10]		$ 16,338	[6],[7],[8]
Interest rate		11.76%	[3],[4],[10]		10.92%	[6],[7],[8]	11.76%	[3],[4],[10]	10.92%	[6],[7],[8]
Investment, Identifier [Axis]: Escalent, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[3],[5],[8],[10]	8%					8%
Principal	[3],[5],[8],[10]	$ 0
Investment, Identifier [Axis]: Escalent, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[3],[8],[10]	8%					8%
Principal	[3],[8],[10]	$ 26,306
Interest rate	[3],[8],[10]	13.34%					13.34%
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[10],[25]		7%	[6],[8],[19]	7%	[3],[4],[10],[25]	7%	[6],[8],[19]
Principal		$ 3,692	[3],[4],[10],[25]		$ 3,692	[6],[8],[19]
Interest rate		12.54%	[3],[4],[10],[25]		10.67%	[6],[8],[19]	12.54%	[3],[4],[10],[25]	10.67%	[6],[8],[19]
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[10],[25]		7%	[6],[8],[19]	7%	[3],[4],[10],[25]	7%	[6],[8],[19]
Principal		$ 44,308	[3],[4],[10],[25]		$ 44,308	[6],[8],[19]
Interest rate		12.54%	[3],[4],[10],[25]		10.67%	[6],[8],[19]	12.54%	[3],[4],[10],[25]	10.67%	[6],[8],[19]
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%			6.50%	[8]	6.50%		6.50%	[8]	6.50%
Principal	[8]				$ 7,600
Interest rate					10.75%	[8]			10.75%	[8]	7.50%
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		9%			9%	[8]	9%		9%	[8]	11%
Principal	[8]				$ 21,200
Interest rate					13.25%	[8]			13.25%	[8]	12%
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[10]		7.50%	[6],[7],[8]	7.50%	[3],[10]	7.50%	[6],[7],[8]
Principal		$ 982	[3],[10]		$ 736	[6],[7],[8]
Interest rate		12.55%	[3],[10]		11.21%	[6],[7],[8]	12.55%	[3],[10]	11.21%	[6],[7],[8]
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[10]		7.50%	[6],[7],[8]	7.50%	[3],[10]	7.50%	[6],[7],[8]
Principal		$ 11,095	[3],[10]		$ 11,095	[6],[7],[8]
Interest rate		12.69%	[3],[10]		12.19%	[6],[7],[8]	12.69%	[3],[10]	12.19%	[6],[7],[8]
Investment, Identifier [Axis]: Fuse, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 1,810	[2]		$ 1,810	[1]
Interest rate		12%	[2]		12%	[1]	12%	[2]	12%	[1]
Investment, Identifier [Axis]: GFG Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 11,345
Interest rate		9%					9%				9%
Investment, Identifier [Axis]: GFG Group, LLC., Secured Debt
Schedule of Investments [Line Items]
Principal					$ 11,345
Interest rate					9%				9%
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											8%
Interest rate											9.06%
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%			6%		6%		6%
Principal		$ 1,300			$ 670
Interest rate		11.17%			10.12%		11.17%		10.12%
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		8%			8%		8%		8%
Principal		$ 40,493			$ 40,493
Interest rate		13.17%			12.12%		13.17%		12.12%
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[5],[10]		6.50%	[6],[8]	6.50%	[3],[4],[5],[10]	6.50%	[6],[8]
Principal		$ 0	[3],[4],[5],[10]		$ 2,177	[6],[8]
Interest rate	[6],[8]				11.20%				11.20%
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[6],[8]				6.50%				6.50%
Principal		$ 0	[3],[5]		$ 10,734	[6],[8]
Interest rate	[6],[8]				11.24%				11.24%
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate	[3],[4],[10]	6.50%					6.50%
Principal	[3],[4],[10]	$ 10,679
Interest rate	[3],[4],[10]	11.70%					11.70%
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5.75%	[3],[4],[10],[36]		6%	[6],[7],[8]	5.75%	[3],[4],[10],[36]	6%	[6],[7],[8]
Principal		$ 303	[3],[4],[10],[36]		$ 252	[6],[7],[8]
Interest rate		11.14%	[3],[4],[10],[36]		10.42%	[6],[7],[8]	11.14%	[3],[4],[10],[36]	10.42%	[6],[7],[8]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		5.75%	[3],[4],[10]		6%	[6],[7],[8],[9]	5.75%	[3],[4],[10]	6%	[6],[7],[8],[9]
Principal		$ 303	[3],[4],[10]		$ 0	[6],[7],[8],[9]
Interest rate	[3],[4],[10]	11.14%					11.14%
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		5.75%	[3],[4],[10]		6%	[6],[7],[8]	5.75%	[3],[4],[10]	6%	[6],[7],[8]
Principal		$ 3,642	[3],[4],[10]		$ 3,661	[6],[7],[8]
Interest rate		11.14%	[3],[4],[10]		10.73%	[6],[7],[8]	11.14%	[3],[4],[10]	10.73%	[6],[7],[8]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											8%
Interest rate											10.50%
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		8.50%	[4],[5],[10],[13]		8.50%	[7],[8],[9]	8.50%	[4],[5],[10],[13]	8.50%	[7],[8],[9]
Principal		$ 0	[4],[5],[10],[13]		$ 0	[7],[8],[9]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		8%	[4],[10],[13]		8.50%	[7],[8]	8%	[4],[10],[13]	8.50%	[7],[8]
Principal		$ 59,678	[4],[10],[13]		$ 64,078	[7],[8]
Interest rate		11%	[4],[10],[13]		11.50%	[7],[8]	11%	[4],[10],[13]	11.50%	[7],[8]
Interest rate		3%					3%
Investment, Identifier [Axis]: Garreco, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		10%	[4],[37]		8%	[8],[38]	10%	[4],[37]	8%	[8],[38]	8%
Principal		$ 3,272	[4],[37]		$ 3,826	[8],[38]
Interest rate		12%	[4],[37]		9.50%	[8],[38]	12%	[4],[37]	9.50%	[8],[38]	9%
Interest rate		2%			1.50%		2%		1.50%
Investment, Identifier [Axis]: GeoStabilization International (GSI), Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.25%	[2],[10]		5.25%	[1],[7]	5.25%	[2],[10]	5.25%	[1],[7]
Principal		$ 20,444	[2],[10]		$ 20,497	[1],[7]
Interest rate		10.17%	[2],[10]		9.44%	[1],[7]	10.17%	[2],[10]	9.44%	[1],[7]
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		9.50%	[4],[5]		9.50%	[8],[9]	9.50%	[4],[5]	9.50%	[8],[9]
Principal		$ 0	[4],[5]		$ 0	[8],[9]
Interest rate											10.60%
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 2,400			$ 2,400
Interest rate		12.50%			12.50%		12.50%		12.50%		12.50%
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		9.50%	[3],[4],[10]		9.50%	[6],[7],[8]	9.50%	[3],[4],[10]	9.50%	[6],[7],[8]
Principal		$ 344	[3],[4],[10]		$ 320	[6],[7],[8]
Interest rate		14.34%	[3],[4],[10]		14.34%	[6],[7],[8]	14.34%	[3],[4],[10]	14.34%	[6],[7],[8]
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		9.50%	[3],[4],[10]		9.50%	[6],[7],[8]	9.50%	[3],[4],[10]	9.50%	[6],[7],[8]
Principal		$ 3,487	[3],[4],[10]		$ 3,277	[6],[7],[8]
Interest rate		14.34%	[3],[4],[10]		14.34%	[6],[7],[8]	14.34%	[3],[4],[10]	14.34%	[6],[7],[8]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[5],[10]		6.50%	[6],[7],[8],[9]	6.50%	[3],[4],[5],[10]	6.50%	[6],[7],[8],[9]
Principal		$ 0	[3],[4],[5],[10]		$ 0	[6],[7],[8],[9]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[5],[10]		6.50%	[6],[7],[8],[9]	6.50%	[3],[4],[5],[10]	6.50%	[6],[7],[8],[9]
Principal		$ 0	[3],[4],[5],[10]		$ 0	[6],[7],[8],[9]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[10]		6.50%	[6],[7],[8]	6.50%	[3],[4],[10]	6.50%	[6],[7],[8]
Principal		$ 16,706	[3],[4],[10]		$ 16,791	[6],[7],[8]
Interest rate		11.60%	[3],[4],[10]		10.62%	[6],[7],[8]	11.60%	[3],[4],[10]	10.62%	[6],[7],[8]
Investment, Identifier [Axis]: HOWLCO LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		6%	[2],[4],[10],[23],[24]		6%	[1],[8],[34],[39]	6%	[2],[4],[10],[23],[24]	6%	[1],[8],[34],[39]
Principal		$ 25,162	[2],[4],[10],[23],[24]		$ 25,290	[1],[8],[34],[39]
Interest rate		11.32%	[2],[4],[10],[23],[24]		10.69%	[1],[8],[34],[39]	11.32%	[2],[4],[10],[23],[24]	10.69%	[1],[8],[34],[39]
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[4],[10]		6%	[8]	6%	[4],[10]	6%	[8]	6%
Principal		$ 3,666	[4],[10]		$ 3,185	[8]
Interest rate		11.53%	[4],[10]		10.13%	[8]	11.53%	[4],[10]	10.13%	[8]	7.13%
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 41,942			$ 37,800
Interest rate		12.50%			9%		12.50%		9%		8%
Investment, Identifier [Axis]: Heartland Dental, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate	[6],[8]				6.50%				6.50%
Principal	[6],[8]				$ 14,663
Interest rate	[6],[8]				10.88%				10.88%
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Unsecured Convertible Debt
Schedule of Investments [Line Items]
Principal		$ 3,000			$ 3,000
Interest rate		8%			8%		8%		8%		8%
Investment, Identifier [Axis]: Hybrid Promotions, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		10.25%	[3],[4],[10]		8.25%	[6],[7]	10.25%	[3],[4],[10]	8.25%	[6],[7]
Principal		$ 7,088	[3],[4],[10]		$ 7,088	[6],[7]
Interest rate		15.76%	[3],[4],[10]		12.07%	[6],[7]	15.76%	[3],[4],[10]	12.07%	[6],[7]
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 21.75% profits interest)
Schedule of Investments [Line Items]
Interest rate	[18],[33],[34]				20%				20%
Investment, Identifier [Axis]: IG Investor, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal	[5]	$ 0
Investment, Identifier [Axis]: IG Investor, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 37,704
Interest rate		13%					13%
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5.75%	[2],[4],[5],[10]		5.75%	[1],[7],[8],[40]	5.75%	[2],[4],[5],[10]	5.75%	[1],[7],[8],[40]
Principal		$ 0	[2],[4],[5],[10]		$ 698	[1],[7],[8],[40]
Interest rate	[1],[7],[8],[40]				10.17%				10.17%
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		5.75%	[2],[4],[10]		5.75%	[1],[7],[8]	5.75%	[2],[4],[10]	5.75%	[1],[7],[8]
Principal		$ 14,426	[2],[4],[10]		$ 14,499	[1],[7],[8]
Interest rate		10.95%	[2],[4],[10]		10.17%	[1],[7],[8]	10.95%	[2],[4],[10]	10.17%	[1],[7],[8]
Investment, Identifier [Axis]: INW Manufacturing, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.75%	[2],[4],[10]		5.75%	[1],[8]	5.75%	[2],[4],[10]	5.75%	[1],[8]
Principal		$ 6,938	[2],[4],[10]		$ 7,125	[1],[8]
Interest rate		11.29%	[2],[4],[10]		10.48%	[1],[8]	11.29%	[2],[4],[10]	10.48%	[1],[8]
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[5],[10]	9%					9%
Principal	[5],[10]	$ 0
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[5],[10]	9%					9%
Principal	[5],[10]	$ 0
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate	[10]	8%					8%
Principal	[10]	$ 4,318
Interest rate	[10]	15.38%					15.38%
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Variable rate	[10]	10%					10%
Principal	[10]	$ 4,318
Interest rate	[10]	17.38%					17.38%
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C., Secured Debt
Schedule of Investments [Line Items]
Variable rate	[3],[4],[10]	7%					7%
Principal	[3],[4],[10]	$ 20,872
Interest rate	[3],[4],[10]	12.24%					12.24%
Investment, Identifier [Axis]: Implus Footcare, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		7.75%	[3],[4],[10]		7.75%	[6],[8]	7.75%	[3],[4],[10]	7.75%	[6],[8]
Principal		$ 18,592	[3],[4],[10]		$ 18,515	[6],[8]
Interest rate		14.65%	[3],[4],[10]		13.98%	[6],[8]	14.65%	[3],[4],[10]	13.98%	[6],[8]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Preferred Stock (non-voting) 1
Schedule of Investments [Line Items]
Interest rate	[6]				6%				6%
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[6],[8],[41]				5.50%				5.50%
Principal	[6],[8],[41]				$ 7,027
Interest rate	[6],[8],[41]				13%				13%
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal	[6],[12]				$ 18,428
Interest rate	[6],[12]				6%				6%
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate	[6],[7]				10%				10%
Principal	[6],[7]				$ 806
Interest rate	[6],[7]				14.42%				14.42%
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Warrants
Schedule of Investments [Line Items]
Strike price (in dollars per share) \| $ / shares					$ 1
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Interest rate		10%	[3],[20],[25]		10%	[6],[18],[19]	10%	[3],[20],[25]	10%	[6],[18],[19]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Interest rate		20%	[3],[20],[25]		20%	[6],[18],[19]	20%	[3],[20],[25]	20%	[6],[18],[19]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.75%	[3],[4],[10]		6.75%	[6],[8]	6.75%	[3],[4],[10]	6.75%	[6],[8]
Principal		$ 1,004	[3],[4],[10]		$ 463	[6],[8]
Interest rate		12.25%	[3],[4],[10]		11.50%	[6],[8]	12.25%	[3],[4],[10]	11.50%	[6],[8]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.75%	[3],[4],[10]		6.75%	[6],[8]	6.75%	[3],[4],[10]	6.75%	[6],[8]
Principal		$ 19,142	[3],[4],[10]		$ 19,239	[6],[8]
Interest rate		12.25%	[3],[4],[10]		11.50%	[6],[8]	12.25%	[3],[4],[10]	11.50%	[6],[8]
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 18,000
Interest rate		13%					13%
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5.50%	[3],[4],[10]		5.50%	[6],[8],[9]	5.50%	[3],[4],[10]	5.50%	[6],[8],[9]
Principal		$ 1,512	[3],[4],[10]		$ 0	[6],[8],[9]
Interest rate	[3],[4],[10]	10.70%					10.70%
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		5.50%	[3],[4],[10]		5.50%	[6],[8]	5.50%	[3],[4],[10]	5.50%	[6],[8]
Principal		$ 8,550	[3],[4],[10]		$ 8,593	[6],[8]
Interest rate		10.70%	[3],[4],[10]		10.23%	[6],[8]	10.70%	[3],[4],[10]	10.23%	[6],[8]
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[3],[4],[10]	8%					8%
Principal	[3],[4],[10]	$ 286
Interest rate	[3],[4],[10]	13.14%					13.14%
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[3],[4],[10]	8%					8%
Principal	[3],[4],[10]	$ 10,273
Interest rate	[3],[4],[10]	13.07%					13.07%
Investment, Identifier [Axis]: Integral Energy Services, Secured Debt
Schedule of Investments [Line Items]
Variable rate	[3],[4]	7.50%					7.50%
Principal	[3],[4]	$ 15,769
Interest rate	[3],[4]	13.04%					13.04%
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		10%	[3],[10]		10%	[6],[42]	10%	[3],[10]	10%	[6],[42]
Principal		$ 1,835	[3],[10]		$ 1,682	[6],[42]
Interest rate		15.34%	[3],[10]		14.22%	[6],[42]	15.34%	[3],[10]	14.22%	[6],[42]
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[10],[11]		7%	[6],[8],[12]	7%	[3],[4],[10],[11]	7%	[6],[8],[12]
Principal		$ 7,313	[3],[4],[10],[11]		$ 7,313	[6],[8],[12]
Interest rate		12.23%	[3],[4],[10],[11]		12.07%	[6],[8],[12]	12.23%	[3],[4],[10],[11]	12.07%	[6],[8],[12]
Investment, Identifier [Axis]: Intermedia Holdings, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate		6%	[2],[4],[10]		6%	[1],[8]	6%	[2],[4],[10]	6%	[1],[8]
Principal		$ 20,361	[2],[4],[10]		$ 20,467	[1],[8]
Interest rate		11.19%	[2],[4],[10]		10.38%	[1],[8]	11.19%	[2],[4],[10]	10.38%	[1],[8]
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4]		6.50%	[6],[8]	6.50%	[3],[4]	6.50%	[6],[8]
Principal		$ 622	[3],[4]		$ 622	[6],[8]
Interest rate		12.04%	[3],[4]		10.14%	[6],[8]	12.04%	[3],[4]	10.14%	[6],[8]
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4]		6.50%	[6],[8]	6.50%	[3],[4]	6.50%	[6],[8]
Principal		$ 16,889	[3],[4]		$ 16,889	[6],[8]
Interest rate		12.04%	[3],[4]		10.17%	[6],[8]	12.04%	[3],[4]	10.17%	[6],[8]
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 4,514			$ 4,534
Interest rate		13.50%			12.50%		13.50%		12.50%		12.50%
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 3,140			$ 3,154
Interest rate		13.50%			12.50%		13.50%		12.50%		12.50%
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Principal		$ 8,944			$ 8,944
Interest rate		13.50%			12.50%		13.50%		12.50%		12.50%
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Principal		$ 19,624			$ 19,712
Interest rate		13.50%			12.50%		13.50%		12.50%
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 5
Schedule of Investments [Line Items]
Principal		$ 11,162
Interest rate		13.50%					13.50%
Investment, Identifier [Axis]: Isagenix International, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.50%	[2],[4],[10]		7.75%	[1],[8],[12]	5.50%	[2],[4],[10]	7.75%	[1],[8],[12]
Principal		$ 2,305	[2],[4],[10]		$ 5,053	[1],[8],[12]
Interest rate		12.46%	[2],[4],[10]		9.93%	[1],[8],[12]	12.46%	[2],[4],[10]	9.93%	[1],[8],[12]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[5]		6%	[6],[8],[9]	6%	[3],[4],[5]	6%	[6],[8],[9]
Principal		$ 0	[3],[4],[5]		$ 0	[6],[8],[9]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4]		6%	[6],[8]	6%	[3],[4]	6%	[6],[8]
Principal		$ 36,474	[3],[4]		$ 36,947	[6],[8]
Interest rate		11.54%	[3],[4]		10.73%	[6],[8]	11.54%	[3],[4]	10.73%	[6],[8]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Preferred Equity
Schedule of Investments [Line Items]
Interest rate	[6],[18]				12%				12%
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4]		7.50%	[6],[8]	7.50%	[3],[4]	7.50%	[6],[8]
Principal		$ 651	[3],[4]		$ 500	[6],[8]
Interest rate		12.69%	[3],[4]		12.23%	[6],[8]	12.69%	[3],[4]	12.23%	[6],[8]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4]		7.50%	[6],[8]	7.50%	[3],[4]	7.50%	[6],[8]
Principal		$ 2,027	[3],[4]		$ 2,079	[6],[8]
Interest rate		12.69%	[3],[4]		12.23%	[6],[8]	12.69%	[3],[4]	12.23%	[6],[8]
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											6.75%
Interest rate											10%
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.75%	[5]		6.75%	[9]	6.75%	[5]	6.75%	[9]
Principal		$ 0	[5]		$ 0	[9]
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.75%	[4]		6.75%	[8]	6.75%	[4]	6.75%	[8]
Principal		$ 2,450	[4]		$ 2,450	[8]
Interest rate		15%	[4]		13.75%	[8]	15%	[4]	13.75%	[8]
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[2],[10],[11]	18%					18%
Principal		$ 2,431	[2],[10],[11]		$ 2,297	[1]
Interest rate		23.35%	[2],[10],[11]		18%	[1]	23.35%	[2],[10],[11]	18%	[1]
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[2],[10],[11]	16%					16%
Principal		$ 4,034	[2],[10],[11]		$ 4,034	[1],[12]
Interest rate		21.48%	[2],[10],[11]		19.75%	[1],[12]	21.48%	[2],[10],[11]	19.75%	[1],[12]
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											11.50%
Interest rate											13%
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		11.50%	[4],[5]		11.50%	[8],[9]	11.50%	[4],[5]	11.50%	[8],[9]
Principal		$ 0	[4],[5]		$ 0	[8],[9]
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		11.50%	[4]		11.50%	[8]	11.50%	[4]	11.50%	[8]
Principal		$ 9,838	[4]		$ 9,999	[8]
Interest rate		16.75%	[4]		15.63%	[8]	16.75%	[4]	15.63%	[8]
Investment, Identifier [Axis]: JorVet Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 25,650			$ 25,650
Interest rate		12%			12%		12%		12%		12%
Investment, Identifier [Axis]: KBK Industries, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 5,300
Interest rate		9%					9%
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4]		7.25%	[6],[8]	7.25%	[3],[4]	7.25%	[6],[8]
Principal		$ 1,042	[3],[4]		$ 1,064	[6],[8]
Interest rate		12.81%	[3],[4]		12%	[6],[8]	12.81%	[3],[4]	12%	[6],[8]
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4]		7.25%	[6],[8]	7.25%	[3],[4]	7.25%	[6],[8]
Principal		$ 7,467	[3],[4]		$ 7,505	[6],[8]
Interest rate		12.81%	[3],[4]		12%	[6],[8]	12.81%	[3],[4]	12%	[6],[8]
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 20,599			$ 20,415
Interest rate		12%			11.50%		12%		11.50%		11.50%
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 3,860			$ 3,879
Interest rate		9%			9%		9%		9%		9%
Investment, Identifier [Axis]: Kore Wireless Group Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.50%	[2],[10]		5.50%	[1],[7]	5.50%	[2],[10]	5.50%	[1],[7]
Principal		$ 11,238	[2],[10]		$ 11,326	[1],[7]
Interest rate		10.84%	[2],[10]		10.08%	[1],[7]	10.84%	[2],[10]	10.08%	[1],[7]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4],[10]		7.25%	[6],[7],[8]	7.25%	[3],[4],[10]	7.25%	[6],[7],[8]
Principal		$ 8,004	[3],[4],[10]		$ 8,106	[6],[7],[8]
Interest rate		12.43%	[3],[4],[10]		11.21%	[6],[7],[8]	12.43%	[3],[4],[10]	11.21%	[6],[7],[8]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4],[10],[43]		7.25%	[6],[7],[8]	7.25%	[3],[4],[10],[43]	7.25%	[6],[7],[8]
Principal		$ 9,154	[3],[4],[10],[43]		$ 9,197	[6],[7],[8]
Interest rate		12.45%	[3],[4],[10],[43]		11.67%	[6],[7],[8]	12.45%	[3],[4],[10],[43]	11.67%	[6],[7],[8]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4],[10]		7.25%	[6],[7],[8]	7.25%	[3],[4],[10]	7.25%	[6],[7],[8]
Principal		$ 10,778	[3],[4],[10]		$ 10,827	[6],[7],[8]
Interest rate		12.44%	[3],[4],[10]		11.67%	[6],[7],[8]	12.44%	[3],[4],[10]	11.67%	[6],[7],[8]
Investment, Identifier [Axis]: LLFlex, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		9%	[3],[4],[10]		9%	[6],[8]	9%	[3],[4],[10]	9%	[6],[8]
Principal		$ 4,428	[3],[4],[10]		$ 4,444	[6],[8]
Interest rate		15.22%	[3],[4],[10]		12.74%	[6],[8]	15.22%	[3],[4],[10]	12.74%	[6],[8]
Investment, Identifier [Axis]: Lightbox Holdings, L.P., Secured Debt
Schedule of Investments [Line Items]
Variable rate		5%	[2],[10]		5%	[1]	5%	[2],[10]	5%	[1]
Principal		$ 14,400	[2],[10]		$ 14,475	[1]
Interest rate		10.50%	[2],[10]		9.73%	[1]	10.50%	[2],[10]	9.73%	[1]
Investment, Identifier [Axis]: Logix Acquisition Company, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.75%	[3],[4]		5.75%	[6],[8]	5.75%	[3],[4]	5.75%	[6],[8]
Principal		$ 23,921	[3],[4]		$ 19,662	[6],[8]
Interest rate		11.48%	[3],[4]		10.13%	[6],[8]	11.48%	[3],[4]	10.13%	[6],[8]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[2],[4],[10],[44]		6%	[1],[7],[8]	6%	[2],[4],[10],[44]	6%	[1],[7],[8]
Principal		$ 10,244	[2],[4],[10],[44]		$ 8,338	[1],[7],[8]
Interest rate		11.20%	[2],[4],[10],[44]		10.42%	[1],[7],[8]	11.20%	[2],[4],[10],[44]	10.42%	[1],[7],[8]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[2],[4],[10]		6%	[1],[7],[8]	6%	[2],[4],[10]	6%	[1],[7],[8]
Principal		$ 7,836	[2],[4],[10]		$ 7,876	[1],[7],[8]
Interest rate		11.20%	[2],[4],[10]		10.42%	[1],[7],[8]	11.20%	[2],[4],[10]	10.42%	[1],[7],[8]
Investment, Identifier [Axis]: MH Corbin Holding LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 5,960	[15]		$ 6,156
Interest rate		13%	[15]		13%		13%	[15]	13%		13%
Investment, Identifier [Axis]: MS Private Loan Fund I, LP, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 0	[5],[23],[45]		$ 0	[9],[33],[34]
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4]		7.25%	[6],[8],[46]	7.25%	[3],[4]	7.25%	[6],[8],[46]
Principal		$ 2,373	[3],[4]		$ 3,103	[6],[8],[46]
Interest rate		12.91%	[3],[4]		11.79%	[6],[8],[46]	12.91%	[3],[4]	11.79%	[6],[8],[46]
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4]		7.25%	[6],[8]	7.25%	[3],[4]	7.25%	[6],[8]
Principal		$ 15,147	[3],[4]		$ 15,324	[6],[8]
Interest rate		12.91%	[3],[4]		11.09%	[6],[8]	12.91%	[3],[4]	11.09%	[6],[8]
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		11%			11%	[8]	11%		11%	[8]	11%
Principal	[8]				$ 6,275
Interest rate					15.13%	[8]			15.13%	[8]	12.13%
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal	[12]				$ 26,079
Interest rate					12%	[12]			12%	[12]	12%
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Preferred Equity
Schedule of Investments [Line Items]
Interest rate		8%	[20]		8%	[18]	8%	[20]	8%	[18]
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 0	[5]		$ 0	[9]
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 23,802			$ 23,802
Interest rate		12.75%			12.75%		12.75%		12.75%
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[5],[10]		6.25%	[6],[7],[8],[9]	6.25%	[3],[4],[5],[10]	6.25%	[6],[7],[8],[9]
Principal		$ 0	[3],[4],[5],[10]		$ 0	[6],[7],[8],[9]
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[10]		6.25%	[6],[7],[8]	6.25%	[3],[4],[10]	6.25%	[6],[7],[8]
Principal		$ 24,123	[3],[4],[10]		$ 26,075	[6],[7],[8]
Interest rate		11.44%	[3],[4],[10]		9.86%	[6],[7],[8]	11.44%	[3],[4],[10]	9.86%	[6],[7],[8]
Investment, Identifier [Axis]: Mills Fleet Farm Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[10]		6.25%	[6],[8]	6.50%	[3],[4],[10]	6.25%	[6],[8]
Principal		$ 18,769	[3],[4],[10]		$ 18,769	[6],[8]
Interest rate		11.77%	[3],[4],[10]		10.66%	[6],[8]	11.77%	[3],[4],[10]	10.66%	[6],[8]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[23],[24]		7%	[6],[8],[9],[34],[39]	7%	[3],[4],[23],[24]	7%	[6],[8],[9],[34],[39]
Principal		$ 3,709	[3],[4],[23],[24]		$ 0	[6],[8],[9],[34],[39]
Interest rate	[3],[4],[23],[24]	12.54%					12.54%
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[23],[24]		7%	[6],[8],[34],[39]	7%	[3],[4],[23],[24]	7%	[6],[8],[34],[39]
Principal		$ 10,107	[3],[4],[23],[24]		$ 10,107	[6],[8],[34],[39]
Interest rate		12.54%	[3],[4],[23],[24]		11.73%	[6],[8],[34],[39]	12.54%	[3],[4],[23],[24]	11.73%	[6],[8],[34],[39]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[10],[23],[24]		7%	[6],[8],[34],[39]	7%	[3],[4],[10],[23],[24]	7%	[6],[8],[34],[39]
Principal		$ 17,038	[3],[4],[10],[23],[24]		$ 17,038	[6],[8],[34],[39]
Interest rate		12.54%	[3],[4],[10],[23],[24]		11.73%	[6],[8],[34],[39]	12.54%	[3],[4],[10],[23],[24]	11.73%	[6],[8],[34],[39]
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Interest rate											10%
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 0	[5]		$ 0	[9]
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 5,746			$ 5,746
Interest rate		10%			10%		10%		10%
Investment, Identifier [Axis]: NBG Acquisition Inc, Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.50%	[2],[4],[11]		5.50%	[1],[8]	5.50%	[2],[4],[11]	5.50%	[1],[8]
Principal		$ 3,849	[2],[4],[11]		$ 3,849	[1],[8]
Interest rate		10.71%	[2],[4],[11]		9.67%	[1],[8]	10.71%	[2],[4],[11]	9.67%	[1],[8]
Investment, Identifier [Axis]: NRP Jones, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 2,080			$ 2,080
Interest rate		12%			12%		12%		12%		12%
Investment, Identifier [Axis]: NTM Acquisition Corp., Secured Debt
Schedule of Investments [Line Items]
Variable rate		7.25%	[2],[4],[10]		6.25%	[1],[8]	7.25%	[2],[4],[10]	6.25%	[1],[8]
Principal		$ 4,237	[2],[4],[10]		$ 4,358	[1],[8]
Interest rate		13.64%	[2],[4],[10]		9.50%	[1],[8]	13.64%	[2],[4],[10]	9.50%	[1],[8]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		8%	[3],[4],[10],[47]		8%	[6],[7],[8],[48]	8%	[3],[4],[10],[47]	8%	[6],[7],[8],[48]
Principal		$ 2,919	[3],[4],[10],[47]		$ 3,941	[6],[7],[8],[48]
Interest rate		13.13%	[3],[4],[10],[47]		10.85%	[6],[7],[8],[48]	13.13%	[3],[4],[10],[47]	10.85%	[6],[7],[8],[48]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		8%	[3],[4],[10]		8%	[6],[7],[8]	8%	[3],[4],[10]	8%	[6],[7],[8]
Principal		$ 39,381	[3],[4],[10]		$ 39,851	[6],[7],[8]
Interest rate		13.19%	[3],[4],[10]		12.56%	[6],[7],[8]	13.19%	[3],[4],[10]	12.56%	[6],[7],[8]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Principal		$ 7,190	[3]		$ 6,509	[6]
Interest rate		20%	[3]		20%	[6]	20%	[3]	20%	[6]
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[8],[9]				7%				7%
Principal		$ 21,294			$ 0	[8],[9]
Interest rate		12%					12%				12%
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 1.1
Schedule of Investments [Line Items]
Variable rate		7%					7%
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 10,500			$ 20,094
Interest rate		12%			12%		12%		12%		12%
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Interest rate		12%					12%
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Principal					$ 10,500
Interest rate		12%			12%		12%		12%
Investment, Identifier [Axis]: NexRev LLC, Secured Debt
Schedule of Investments [Line Items]
Interest rate											11%
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 0	[5]		$ 0	[9]
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 9,811			$ 11,465
Interest rate		10%			11%		10%		11%
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[5],[10]		6.25%	[6],[8],[9]	6.25%	[3],[4],[5],[10]	6.25%	[6],[8],[9]
Principal		$ 0	[3],[4],[5],[10]		$ 0	[6],[8],[9]
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[5],[10]		6.25%	[6],[8],[9]	6.25%	[3],[4],[5],[10]	6.25%	[6],[8],[9]
Principal		$ 0	[3],[4],[5],[10]		$ 0	[6],[8],[9]
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[10]		6.25%	[6],[8]	6%	[3],[4],[10]	6.25%	[6],[8]
Principal		$ 20,467	[3],[4],[10]		$ 21,666	[6],[8]
Interest rate		11.26%	[3],[4],[10]		9.99%	[6],[8]	11.26%	[3],[4],[10]	9.99%	[6],[8]
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[4]		6.50%	[8]	6.50%	[4]	6.50%	[8]	6.50%
Principal		$ 4,400	[4]		$ 4,400	[8]
Interest rate		11.75%	[4]		10.63%	[8]	11.75%	[4]	10.63%	[8]	7.63%
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 18,440			$ 18,440
Interest rate		12%			12%		12%		12%		12%
Investment, Identifier [Axis]: OMi Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 14,250			$ 15,750
Interest rate		12%			12%		12%		12%		12%
Investment, Identifier [Axis]: OVG Business Services, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate	[6],[8]				6.25%				6.25%
Principal	[6],[8]				$ 13,930
Interest rate	[6],[8]				10.64%				10.64%
Investment, Identifier [Axis]: Obra Capital, Inc, Secured Debt
Schedule of Investments [Line Items]
Variable rate	[2],[10]	6%					6%
Principal	[2],[10]	$ 18,230
Interest rate	[2],[10]	11.22%					11.22%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Preferred Stock
Schedule of Investments [Line Items]
Interest rate		7%			7%		7%		7%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 964	[11]		$ 964	[12]
Interest rate		12%	[11]		12%	[12]	12%	[11]	12%	[12]	12%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 983	[11]		$ 983	[12]
Interest rate		12%	[11]		12%	[12]	12%	[11]	12%	[12]	12%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Principal		$ 2,116	[11]		$ 2,116	[12]
Interest rate		12%	[11]		12%	[12]	12%	[11]	12%	[12]	12%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 4
Schedule of Investments [Line Items]
Principal		$ 4,415	[11]		$ 4,415	[12]
Interest rate		12%	[11]		12%	[12]	12%	[11]	12%	[12]	12%
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Unsecured Debt
Schedule of Investments [Line Items]
Principal		$ 305	[11]		$ 305	[12]
Interest rate		10%	[11]		10%	[12]	10%	[11]	10%	[12]	10%
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											11%
Interest rate											12.06%
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		11%	[4],[5]		11%	[8],[9]	11%	[4],[5]	11%	[8],[9]
Principal		$ 0	[4],[5]		$ 0	[8],[9]
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		11%	[4]		11%	[8]	11%	[4]	11%	[8]
Principal		$ 5,520	[4]		$ 5,600	[8]
Interest rate		16.25%	[4]		15.13%	[8]	16.25%	[4]	15.13%	[8]
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate											11%
Interest rate											12%
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		11%	[4],[5]		11%	[8],[9]	11%	[4],[5]	11%	[8],[9]
Principal		$ 0	[4],[5]		$ 0	[8],[9]
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		11%	[4]		11%	[8]	11%	[4]	11%	[8]
Principal		$ 22,800	[4]		$ 23,600	[8]
Interest rate		16.25%	[4]		15.13%	[8]	16.25%	[4]	15.13%	[8]
Investment, Identifier [Axis]: Ospemifene Royalty Sub LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 4,461	[3],[11]		$ 4,489	[6],[12]
Interest rate		11.50%	[3],[11]		11.50%	[6],[12]	11.50%	[3],[11]	11.50%	[6],[12]
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate											7%
Interest rate											7.97%
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		8.75%	[4],[5]		7%	[8],[9]	8.75%	[4],[5]	7%	[8],[9]
Principal		$ 0	[4],[5]		$ 0	[8],[9]
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		8.75%	[4]		7%	[8]	8.75%	[4]	7%	[8]
Principal		$ 20,290	[4]		$ 21,655	[8]
Interest rate		13.63%	[4]		10.25%	[8]	13.63%	[4]	10.25%	[8]
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[23]		7.25%	[6],[7],[8],[9],[34]	6.25%	[3],[4],[23]	7.25%	[6],[7],[8],[9],[34]
Principal		$ 2,385	[3],[4],[23]		$ 0	[6],[7],[8],[9],[34]
Interest rate	[3],[4],[23]	14.50%					14.50%
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4],[10],[23]		7.25%	[6],[7],[8],[34]	7.25%	[3],[4],[10],[23]	7.25%	[6],[7],[8],[34]
Principal		$ 27,552	[3],[4],[10],[23]		$ 28,265	[6],[7],[8],[34]
Interest rate		12.64%	[3],[4],[10],[23]		11.80%	[6],[7],[8],[34]	12.64%	[3],[4],[10],[23]	11.80%	[6],[7],[8],[34]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5.75%	[3],[4],[10]		5.75%	[6],[7],[8]	5.75%	[3],[4],[10]	5.75%	[6],[7],[8]
Principal		$ 216	[3],[4],[10]		$ 541	[6],[7],[8]
Interest rate		11.10%	[3],[4],[10]		10.26%	[6],[7],[8]	11.10%	[3],[4],[10]	10.26%	[6],[7],[8]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		5.75%	[3],[4],[10]		5.75%	[6],[7],[8],[49]	5.75%	[3],[4],[10]	5.75%	[6],[7],[8],[49]
Principal		$ 3,221	[3],[4],[10]		$ 2,701	[6],[7],[8],[49]
Interest rate		10.92%	[3],[4],[10]		9.96%	[6],[7],[8],[49]	10.92%	[3],[4],[10]	9.96%	[6],[7],[8],[49]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		5.75%	[3],[4],[10]		5.75%	[6],[7],[8]	5.75%	[3],[4],[10]	5.75%	[6],[7],[8]
Principal		$ 18,692	[3],[4],[10]		$ 18,293	[6],[7],[8]
Interest rate		10.88%	[3],[4],[10]		9.81%	[6],[7],[8]	10.88%	[3],[4],[10]	9.81%	[6],[7],[8]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt
Schedule of Investments [Line Items]
Interest rate											12%
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 3,500			$ 0	[9]
Interest rate		12%					12%
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 13,500			0	[9]
Interest rate		12%					12%
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 3
Schedule of Investments [Line Items]
Principal		$ 27,681			$ 28,681
Interest rate		12%			12%		12%		12%
Investment, Identifier [Axis]: Power System Solutions, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[3],[4],[5],[10]	6.75%					6.75%
Principal	[3],[4],[5],[10]	$ 0
Investment, Identifier [Axis]: Power System Solutions, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[3],[4],[5],[10]	6.75%					6.75%
Principal	[3],[4],[5],[10]	$ 0
Investment, Identifier [Axis]: Power System Solutions, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate	[3],[4],[10]	6.75%					6.75%
Principal	[3],[4],[10]	$ 18,511
Interest rate	[3],[4],[10]	11.90%					11.90%
Investment, Identifier [Axis]: PrimeFlight Aviation Services, Secured Debt
Schedule of Investments [Line Items]
Variable rate	[3],[4],[10]	6.85%					6.85%
Principal	[3],[4],[10]	$ 8,000
Interest rate	[3],[4],[10]	11.94%					11.94%
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 5,897
Interest rate		13%					13%
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal	[9]				$ 0
Interest rate											13%
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal					$ 5,897
Interest rate		13%			13%		13%		13%		13%
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[5],[10]		6.25%	[6],[8],[9]	6%	[3],[4],[5],[10]	6.25%	[6],[8],[9]
Principal		$ 0	[3],[4],[5],[10]		$ 0	[6],[8],[9]
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[10]		6.25%	[6],[8]	6%	[3],[4],[10]	6.25%	[6],[8]
Principal		$ 29,271	[3],[4],[10]		$ 29,475	[6],[8]
Interest rate		11.22%	[3],[4],[10]		10.64%	[6],[8]	11.22%	[3],[4],[10]	10.64%	[6],[8]
Investment, Identifier [Axis]: Quality Lease Service, LLC, Secured Debt
Schedule of Investments [Line Items]
Interest rate											12%
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.75%	[3],[4],[5],[10]		6.75%	[6],[7],[8],[9]	6.75%	[3],[4],[5],[10]	6.75%	[6],[7],[8],[9]
Principal		$ 0	[3],[4],[5],[10]		$ 0	[6],[7],[8],[9]
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.75%	[3],[4],[10]		6.75%	[6],[7],[8]	6.75%	[3],[4],[10]	6.75%	[6],[7],[8]
Principal		$ 13,369	[3],[4],[10]		$ 13,369	[6],[7],[8]
Interest rate		11.88%	[3],[4],[10]		10.56%	[6],[7],[8]	11.88%	[3],[4],[10]	10.56%	[6],[7],[8]
Investment, Identifier [Axis]: RM Bidder, LLC, Warrants
Schedule of Investments [Line Items]
Strike price (in dollars per share) \| $ / shares				$ 14.28	$ 14.28
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.75%	[3],[4],[10]		7.75%	[6],[7],[8],[50]	7.75%	[3],[4],[10]	7.75%	[6],[7],[8],[50]
Principal		$ 1,781	[3],[4],[10]		$ 1,361	[6],[7],[8],[50]
Interest rate		13.01%	[3],[4],[10]		12.02%	[6],[7],[8],[50]	13.01%	[3],[4],[10]	12.02%	[6],[7],[8],[50]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.75%	[3],[4],[10]		7.75%	[6],[7],[8]	7.75%	[3],[4],[10]	7.75%	[6],[7],[8]
Principal		$ 15,141	[3],[4],[10]		$ 16,623	[6],[7],[8]
Interest rate		13.01%	[3],[4],[10]		11.49%	[6],[7],[8]	13.01%	[3],[4],[10]	11.49%	[6],[7],[8]
Investment, Identifier [Axis]: Research Now Group, Inc. and Survey Sampling International, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.50%	[2],[4],[10]		5.50%	[1],[8]	5.50%	[2],[4],[10]	5.50%	[1],[8]
Principal		$ 19,862	[2],[4],[10]		$ 19,966	[1],[8]
Interest rate		10.80%	[2],[4],[10]		8.84%	[1],[8]	10.80%	[2],[4],[10]	8.84%	[1],[8]
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate											11%
Interest rate											12%
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 0	[5]		$ 0	[8],[9]
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 35,010			$ 35,685	[8]
Interest rate		12.50%			12.50%	[8]	12.50%		12.50%	[8]
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Secured Debt
Schedule of Investments [Line Items]
Principal	[12],[17],[51]				$ 30,369
Interest rate	[12],[17],[51]				12%				12%
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[5],[10]		6.50%	[6],[7],[8]	6.50%	[3],[4],[5],[10]	6.50%	[6],[7],[8]
Principal		$ 0	[3],[4],[5],[10]		$ 311	[6],[7],[8]
Interest rate	[6],[7],[8]				10.97%				10.97%
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.50%	[3],[4],[10]		6.50%	[6],[7],[8]	6.50%	[3],[4],[10]	6.50%	[6],[7],[8]
Principal		$ 2,333	[3],[4],[10]		$ 2,333	[6],[7],[8]
Interest rate		11.65%	[3],[4],[10]		10.32%	[6],[7],[8]	11.65%	[3],[4],[10]	10.32%	[6],[7],[8]
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[10],[52]		6.50%	[6],[7],[8]	7.50%	[3],[4],[10],[52]	6.50%	[6],[7],[8]
Principal		$ 4,418	[3],[4],[10],[52]		$ 3,173	[6],[7],[8]
Interest rate		12.65%	[3],[4],[10],[52]		10.32%	[6],[7],[8]	12.65%	[3],[4],[10],[52]	10.32%	[6],[7],[8]
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[10]		6.25%	[6],[7],[8]	6%	[3],[4],[10]	6.25%	[6],[7],[8]
Principal		$ 5,682	[3],[4],[10]		$ 5,625	[6],[7],[8]
Interest rate		13.43%	[3],[4],[10]		13.02%	[6],[7],[8]	13.43%	[3],[4],[10]	13.02%	[6],[7],[8]
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[10]		6.25%	[6],[7],[8]	6%	[3],[4],[10]	6.25%	[6],[7],[8]
Principal		$ 8,425	[3],[4],[10]		$ 8,340	[6],[7],[8]
Interest rate		13.43%	[3],[4],[10]		13.02%	[6],[7],[8]	13.43%	[3],[4],[10]	13.02%	[6],[7],[8]
Investment, Identifier [Axis]: SI East, LLC, Secured Debt
Schedule of Investments [Line Items]
Interest rate											10.25%
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 0	[5]		$ 0	[9]
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 54,536	[53]		$ 89,786
Interest rate		12.78%	[53]		9.50%		12.78%	[53]	9.50%
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Interest rate		12.78%					12.78%
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[10]		6.25%	[6],[8]	6.25%	[3],[4],[10]	6.25%	[6],[8]
Principal		$ 590	[3],[4],[10]		$ 417	[6],[8]
Interest rate		11.68%	[3],[4],[10]		11.01%	[6],[8]	11.68%	[3],[4],[10]	11.01%	[6],[8]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[10]		6.25%	[6],[8]	6.25%	[3],[4],[10]	6.25%	[6],[8]
Principal		$ 1,534	[3],[4],[10]		$ 1,553	[6],[8]
Interest rate		11.68%	[3],[4],[10]		11.01%	[6],[8]	11.68%	[3],[4],[10]	11.01%	[6],[8]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[10]		6.25%	[6],[8]	6.25%	[3],[4],[10]	6.25%	[6],[8]
Principal		$ 7,633	[3],[4],[10]		$ 7,750	[6],[8]
Interest rate		11.68%	[3],[4],[10]		11.01%	[6],[8]	11.68%	[3],[4],[10]	11.01%	[6],[8]
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[10]		7.50%	[6],[7],[8],[9]	7.50%	[3],[4],[10]	7.50%	[6],[7],[8],[9]
Principal		$ 958	[3],[4],[10]		$ 0	[6],[7],[8],[9]
Interest rate	[3],[4],[10]	12.96%					12.96%
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.50%	[3],[4],[10]		7.50%	[6],[7],[8]	7.50%	[3],[4],[10]	7.50%	[6],[7],[8]
Principal		$ 15,808	[3],[4],[10]		$ 15,928	[6],[7],[8]
Interest rate		12.61%	[3],[4],[10]		11.06%	[6],[7],[8]	12.61%	[3],[4],[10]	11.06%	[6],[7],[8]
Investment, Identifier [Axis]: Savers, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate	[1],[7],[8]				5.50%				5.50%
Principal	[1],[7],[8]				$ 11,286
Interest rate	[1],[7],[8]				10.34%				10.34%
Investment, Identifier [Axis]: Slick Innovations, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 13,040			$ 13,840
Interest rate		14%			14%		14%		14%		13%
Investment, Identifier [Axis]: Sonic Systems International, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate					7.50%	[6],[8]			7.50%	[6],[8]	7.50%
Principal	[6],[8]				$ 15,769
Interest rate					11.24%	[6],[8]			11.24%	[6],[8]	8.50%
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5.25%	[3],[4],[5]		5.75%	[6],[8],[9]	5.25%	[3],[4],[5]	5.75%	[6],[8],[9]
Principal		$ 0	[3],[4],[5]		$ 0	[6],[8],[9]
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		5.25%	[3],[4]		5.75%	[6],[8]	5.25%	[3],[4]	5.75%	[6],[8]
Principal		$ 35,094	[3],[4]		$ 41,255	[6],[8]
Interest rate		10.90%	[3],[4]		9.69%	[6],[8]	10.90%	[3],[4]	9.69%	[6],[8]
Investment, Identifier [Axis]: Staples Canada ULC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[23],[24],[54]		7%	[6],[8],[34],[39],[55]	7%	[3],[4],[23],[24],[54]	7%	[6],[8],[34],[39],[55]
Principal		$ 12,552	[3],[4],[23],[24],[54]		$ 13,740	[6],[8],[34],[39],[55]
Interest rate		12.26%	[3],[4],[23],[24],[54]		11.83%	[6],[8],[34],[39],[55]	12.26%	[3],[4],[23],[24],[54]	11.83%	[6],[8],[34],[39],[55]
Investment, Identifier [Axis]: Stellant Systems, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.50%	[2],[4],[10]		5.50%	[1],[7],[8]	5.50%	[2],[4],[10]	5.50%	[1],[7],[8]
Principal		$ 7,565	[2],[4],[10]		$ 7,623	[1],[7],[8]
Interest rate		10.91%	[2],[4],[10]		10.05%	[1],[7],[8]	10.91%	[2],[4],[10]	10.05%	[1],[7],[8]
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate	[6]				8.50%				8.50%
Principal		$ 5,214	[3]		$ 5,000	[6]
Interest rate		8.50%	[3]		13.27%	[6]	8.50%	[3]	13.27%	[6]
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Secured Debt
Schedule of Investments [Line Items]
Principal		$ 20,500			$ 21,500
Interest rate		12%			12%		12%		12%		12%
Investment, Identifier [Axis]: Tacala Investment Corp., Secured Debt
Schedule of Investments [Line Items]
Variable rate	[8],[56],[57]				3.50%				3.50%
Principal	[8],[56],[57]				$ 1,974
Interest rate	[8],[56],[57]				7.88%				7.88%
Investment, Identifier [Axis]: Team Public Choices, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		5%	[2],[4],[10]		5%	[1],[8]	5%	[2],[4],[10]	5%	[1],[8]
Principal		$ 14,888	[2],[4],[10]		$ 14,964	[1],[8]
Interest rate		10.27%	[2],[4],[10]		9.93%	[1],[8]	10.27%	[2],[4],[10]	9.93%	[1],[8]
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 1,840			$ 1,840
Interest rate		12%			12%		12%		12%		12%
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 15,200			$ 15,200
Interest rate		12%			12%		12%		12%
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt
Schedule of Investments [Line Items]
Interest rate											11.83%
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 0	[5]		$ 120
Interest rate					13%				13%
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 8,921			$ 9,521
Interest rate		13%			13%		13%		13%
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Interest rate											12%
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 0	[5]		$ 0	[9]
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 7,920			$ 7,920
Interest rate		12%			12%		12%		12%
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt
Schedule of Investments [Line Items]
Variable rate	[1],[7],[8]				1.25%				1.25%
Principal	[1],[7],[8]				$ 18,352
Interest rate	[1],[7],[8]				11.57%				11.57%
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate	[2],[4],[10]	1%					1%
Principal	[2],[4],[10]	$ 9,457
Interest rate	[2],[4],[10]	6%					6%
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate	[2],[4],[10]	1%					1%
Principal	[2],[4],[10]	$ 946
Interest rate	[2],[4],[10]	6%					6%
Investment, Identifier [Axis]: USA DeBusk LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		5.75%	[3],[4]		5.75%	[6],[8]	5.75%	[3],[4]	5.75%	[6],[8]
Principal		$ 33,407	[3],[4]		$ 33,577	[6],[8]
Interest rate		10.94%	[3],[4]		9.82%	[6],[8]	10.94%	[3],[4]	9.82%	[6],[8]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 1
Schedule of Investments [Line Items]
Interest rate		20%	[2],[20]		20%	[1],[18]	20%	[2],[20]	20%	[1],[18]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 2
Schedule of Investments [Line Items]
Interest rate		20%	[2]		20%	[1]	20%	[2]	20%	[1]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 3
Schedule of Investments [Line Items]
Interest rate		19%	[2]		19%	[1]	19%	[2]	19%	[1]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 4
Schedule of Investments [Line Items]
Interest rate		13.50%	[2]		13.50%	[1]	13.50%	[2]	13.50%	[1]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Convertible Debt
Schedule of Investments [Line Items]
Principal		$ 2,590	[2]		$ 2,403	[1]
Interest rate		15%	[2]		15%	[1]	15%	[2]	15%	[1]	15%
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.50%			5.50%	[1],[7],[8]	7.50%		5.50%	[1],[7],[8]	5.50%
Principal	[1],[7],[8]				$ 406
Interest rate					10.76%	[1],[7],[8]			10.76%	[1],[7],[8]	9.07%
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.50%			5.50%	[1],[7],[8]	7.50%		5.50%	[1],[7],[8]	5.50%
Principal	[1],[7],[8]				$ 1,814
Interest rate					10.76%	[1],[7],[8]			10.76%	[1],[7],[8]	9.07%
Investment, Identifier [Axis]: UnionRock Energy Fund II, LP, LP Interests
Schedule of Investments [Line Items]
Interest rate	[18],[33],[34],[35]				11.11%				11.11%
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Interest rate		14%	[3],[25]		14%	[6],[19]	14%	[3],[25]	14%	[6],[19]
Investment, Identifier [Axis]: UserZoom Technologies, Inc., Secured Debt
Schedule of Investments [Line Items]
Variable rate	[3],[4],[10]	7.50%					7.50%
Principal	[3],[4],[10]	$ 4,000
Interest rate	[3],[4],[10]	12.42%					12.42%
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt
Schedule of Investments [Line Items]
Interest rate											11.50%
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[4],[5],[25]		6%	[8],[9],[19]	6%	[4],[5],[25]	6%	[8],[9],[19]
Principal		$ 0	[4],[5],[25]		$ 0	[8],[9],[19]
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 29,158	[25]		$ 30,400	[19]
Interest rate		11.50%	[25]		11.50%	[19]	11.50%	[25]	11.50%	[19]
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5.25%	[2],[4],[5],[10]		5.25%	[1],[8],[9]	5.25%	[2],[4],[5],[10]	5.25%	[1],[8],[9]
Principal		$ 0	[2],[4],[5],[10]		$ 0	[1],[8],[9]
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[2],[4],[10]		6%	[1],[8]	6%	[2],[4],[10]	6%	[1],[8]
Principal		$ 17,512	[2],[4],[10]		$ 17,685	[1],[8]
Interest rate		11.31%	[2],[4],[10]		10.41%	[1],[8]	11.31%	[2],[4],[10]	10.41%	[1],[8]
Investment, Identifier [Axis]: Vida Capital, Inc, Secured Debt
Schedule of Investments [Line Items]
Variable rate	[1]				6%				6%
Principal	[1]				$ 15,448
Interest rate	[1]				10.38%				10.38%
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 2,100			$ 16,734	[17]
Interest rate		10%			11.50%	[17]	10%		11.50%	[17]	11.50%
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Interest rate		10%					10%
Investment, Identifier [Axis]: Volusion, LLC, Unsecured Convertible Debt
Schedule of Investments [Line Items]
Principal					$ 409
Interest rate					8%				8%		8%
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt
Schedule of Investments [Line Items]
Variable rate	[1],[7],[8]				5.75%				5.75%
Principal	[1],[7],[8]				$ 14,625
Interest rate	[1],[7],[8]				10.64%				10.64%
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[5],[10]		7%	[6],[8],[9]	7%	[3],[4],[5],[10]	7%	[6],[8],[9]
Principal		$ 0	[3],[4],[5],[10]		$ 0	[6],[8],[9]
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[10]		7%	[6],[8]	7%	[3],[4],[10]	7%	[6],[8]
Principal		$ 3,751	[3],[4],[10]		$ 4,235	[6],[8]
Interest rate		12.19%	[3],[4],[10]		10.74%	[6],[8]	12.19%	[3],[4],[10]	10.74%	[6],[8]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[10],[58]		6%	[6],[8]	6.25%	[3],[4],[10],[58]	6%	[6],[8]
Principal		$ 1,482	[3],[4],[10],[58]		$ 371	[6],[8]
Interest rate		11.64%	[3],[4],[10],[58]		10.73%	[6],[8]	11.64%	[3],[4],[10],[58]	10.73%	[6],[8]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[10]		6%	[6],[8]	6.25%	[3],[4],[10]	6%	[6],[8]
Principal		$ 389	[3],[4],[10]		$ 391	[6],[8]
Interest rate		11.64%	[3],[4],[10]		10.73%	[6],[8]	11.64%	[3],[4],[10]	10.73%	[6],[8]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		6.25%	[3],[4],[10]		6%	[6],[8]	6.25%	[3],[4],[10]	6%	[6],[8]
Principal		$ 28,811	[3],[4],[10]		$ 28,957	[6],[8]
Interest rate		11.64%	[3],[4],[10]		10.73%	[6],[8]	11.64%	[3],[4],[10]	10.73%	[6],[8]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[5],[10]		6%	[6],[7],[8],[9]	6%	[3],[4],[5],[10]	6%	[6],[7],[8],[9]
Principal		$ 0	[3],[4],[5],[10]		$ 0	[6],[7],[8],[9]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		6%	[3],[4],[10]		6%	[6],[7],[8]	6%	[3],[4],[10]	6%	[6],[7],[8]
Principal		$ 10,712	[3],[4],[10]		$ 10,794	[6],[7],[8]
Interest rate		10.79%	[3],[4],[10]		8.59%	[6],[7],[8]	10.79%	[3],[4],[10]	8.59%	[6],[7],[8]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[5],[10]		7%	[6],[8],[9]	7%	[3],[4],[5],[10]	7%	[6],[8],[9]
Principal		$ 0	[3],[4],[5],[10]		$ 0	[6],[8],[9]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[10]		7%	[6],[8],[9]	7%	[3],[4],[10]	7%	[6],[8],[9]
Principal		$ 2,067	[3],[4],[10]		$ 0	[6],[8],[9]
Interest rate	[3],[4],[10]	12.55%					12.55%
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		7%	[3],[4],[10]		7%	[6],[8]	7%	[3],[4],[10]	7%	[6],[8]
Principal		$ 9,300	[3],[4],[10]		$ 10,000	[6],[8]
Interest rate		12.17%	[3],[4],[10]		10.74%	[6],[8]	12.17%	[3],[4],[10]	10.74%	[6],[8]
Investment, Identifier [Axis]: World Micro Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Principal		$ 14,280			$ 14,280
Interest rate		13%			13%		13%		13%
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		5.25%	[3],[10]		5.25%	[6],[9]	5.25%	[3],[10]	5.25%	[6],[9]
Principal		$ 3,192	[3],[10]		$ 0	[6],[9]
Interest rate	[3],[10]	10.41%					10.41%
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		5.25%	[3],[10]		5.25%	[6]	5.25%	[3],[10]	5.25%	[6]
Principal		$ 24,239	[3],[10]		$ 24,300	[6]
Interest rate		10.58%	[3],[10]		10.84%	[6]	10.58%	[3],[10]	10.84%	[6]
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Variable rate		5.25%	[3],[10]		5.25%	[6]	5.25%	[3],[10]	5.25%	[6]
Principal		$ 38,021	[3],[10]		$ 38,311	[6]
Interest rate		10.35%	[3],[10]		8.63%	[6]	10.35%	[3],[10]	8.63%	[6]
Investment, Identifier [Axis]: YS Garments, LLC, Secured Debt
Schedule of Investments [Line Items]
Variable rate		7.50%	[2],[4],[10]		5.50%	[1],[8]	7.50%	[2],[4],[10]	5.50%	[1],[8]
Principal		$ 12,378	[2],[4],[10]		$ 12,659	[1],[8]
Interest rate		12.59%	[2],[4],[10]		9.51%	[1],[8]	12.59%	[2],[4],[10]	9.51%	[1],[8]
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Principal		$ 450			$ 450
Interest rate		12%			12%		12%		12%		12%
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Principal		$ 1,000			$ 1,000
Interest rate		6.50%			6.50%		6.50%		6.50%		6.50%
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Principal		$ 2,750			$ 2,750
Interest rate		14%			14%		14%		14%		14%
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4],[10],[43]		7.25%	[6],[7],[8]	7.25%	[3],[4],[10],[43]	7.25%	[6],[7],[8]
Principal		$ 17,424	[3],[4],[10],[43]		$ 17,512	[6],[7],[8]
Interest rate		12.50%	[3],[4],[10],[43]		11.67%	[6],[7],[8]	12.50%	[3],[4],[10],[43]	11.67%	[6],[7],[8]
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Variable rate		7.25%	[3],[4],[10],[43]		7.25%	[6],[7],[8],[57]	7.25%	[3],[4],[10],[43]	7.25%	[6],[7],[8],[57]
Principal		$ 4,367	[3],[4],[10],[43]		$ 4,389	[6],[7],[8],[57]
Interest rate		12.46%	[3],[4],[10],[43]		11.67%	[6],[7],[8],[57]	12.46%	[3],[4],[10],[43]	11.67%	[6],[7],[8],[57]
Forward foreign currency contract \| Staples Canada ULC
Schedule of Investments [Line Items]
Principal		$ 12,000			$ 13,100		$ 15.5		$ 16.9
Foreign currency transaction gain (loss), unrealized		$ 300			$ 600
Minimum
Schedule of Investments [Line Items]
Variable rate		0.10%			0.10%		0.10%		0.10%
Minimum \| Roof Opco, LLC
Schedule of Investments [Line Items]
Floor rate		1.50%					1.50%
Maximum
Schedule of Investments [Line Items]
Variable rate		0.26%			0.35%		0.26%		0.35%
Maximum \| Roof Opco, LLC
Schedule of Investments [Line Items]
Floor rate		1.50%					1.50%
LIBOR or SOFR \| Minimum
Schedule of Investments [Line Items]
Variable rate		0.50%			0.50%		0.50%		0.50%
LIBOR or SOFR \| Maximum
Schedule of Investments [Line Items]
Variable rate		2%					2%
Floor rate					2%				2%
LIBOR or SOFR \| Weighted Average
Schedule of Investments [Line Items]
Floor rate		1.08%			1.04%		1.08%		1.04%
LIBOR \| Computer Data Source, LLC
Schedule of Investments [Line Items]
Variable rate		7.50%			8%		7.50%		8%
LIBOR \| Watterson Brands, LLC
Schedule of Investments [Line Items]
Variable rate		6.25%					6.25%
LIBOR \| Cadence Aerospace LLC
Schedule of Investments [Line Items]
Variable rate					6.50%				6.50%
LIBOR \| Independent Pet Partners Intermediate Holdings, LLC
Schedule of Investments [Line Items]
Variable rate					6.50%				6.50%
LIBOR \| Interface Security Systems, L.L.C
Schedule of Investments [Line Items]
Variable rate					10%				10%
LIBOR \| Mako Steel, LP
Schedule of Investments [Line Items]
Variable rate					7.25%				7.25%
SOFR \| MB2 Dental Solutions, LLC
Schedule of Investments [Line Items]
Variable rate		6%					6%
SOFR \| Various Investment 1
Schedule of Investments [Line Items]
Variable rate					7.25%				7.25%
SOFR \| Various Investments 2
Schedule of Investments [Line Items]
Variable rate		6.25%					6.25%
SOFR \| Dalton US Inc.
Schedule of Investments [Line Items]
Variable rate		8.50%					8.50%
SOFR \| GULF PACIFIC ACQUISITION, LLC
Schedule of Investments [Line Items]
Variable rate		5.75%					5.75%
SOFR \| Various Investments 3
Schedule of Investments [Line Items]
Variable rate		7.25%					7.25%
SOFR \| NWN Corporation
Schedule of Investments [Line Items]
Variable rate		8%			8%		8%		8%
SOFR \| Bolder Panther Group, LLC
Schedule of Investments [Line Items]
Variable rate		8%			8%		8%		8%
SOFR \| Arrow International, Inc
Schedule of Investments [Line Items]
Variable rate					6%				6%
SOFR \| Channel Partners Intermediateco, LLC
Schedule of Investments [Line Items]
Variable rate					6.25%				6.25%
SOFR \| IG Parent Corporation
Schedule of Investments [Line Items]
Variable rate					5.75%				5.75%
SOFR \| Channel Partners Intermediateco, LLC
Schedule of Investments [Line Items]
Variable rate					6.25%				6.25%
SOFR \| Paragon Healthcare, Inc.
Schedule of Investments [Line Items]
Variable rate					5.75%				5.75%
SOFR \| RTIC Subsidiary Holdings, LLC
Schedule of Investments [Line Items]
Variable rate					7.75%				7.75%
SOFR \| Minimum \| Roof Opco, LLC
Schedule of Investments [Line Items]
Variable rate		6.50%					6.50%
SOFR \| Maximum \| Roof Opco, LLC
Schedule of Investments [Line Items]
Variable rate		8.50%					8.50%
Prime Rate \| Independent Pet Partners Intermediate Holdings, LLC
Schedule of Investments [Line Items]
Variable rate					5.50%				5.50%

[1] Middle Market portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Middle Market portfolio investments. Middle Market portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Middle Market portfolio investments. Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Private Loan portfolio investments. Private Loan portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Private Loan portfolio investments. Other Portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Other Portfolio investments. Other Portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Other Portfolio investments. Short-term portfolio investments. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of short-term portfolio investments.

ORGANIZATION AND BASIS OF PRESE

ORGANIZATION AND BASIS OF PRESENTATION	6 Months Ended
ORGANIZATION AND BASIS OF PRESENTATION	Jun. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION AND BASIS OF PRESENTATION	ORGANIZATION AND BASIS OF PRESENTATION 1. Organization Main Street Capital Corporation (“MSCC”, or together with its consolidated subsidiaries, “Main Street” or the “Company”) is a principal investment firm primarily focused on providing customized debt and equity financing to lower middle market (“LMM”) companies and debt capital to middle market (“Middle Market”) companies. Main Street’s portfolio investments are typically made to support management buyouts, recapitalizations, growth financings, refinancings and acquisitions of companies that operate in a variety of industry sectors. Main Street seeks to partner with entrepreneurs, business owners and management teams and generally provides “one-stop” financing alternatives within its LMM investment strategy. Main Street invests primarily in secured debt investments, equity investments, warrants and other securities of LMM companies based in the United States and in secured debt investments of Middle Market companies generally headquartered in the United States. MSCC was formed in March 2007 to operate as an internally managed business development company (“BDC”) under the Investment Company Act of 1940, as amended (the “1940 Act”). Because MSCC is internally managed, all of the executive officers and other employees are employed by MSCC. Therefore, MSCC does not pay any external investment advisory fees, but instead directly incurs the operating costs associated with employing investment and portfolio management professionals. MSCC wholly owns several investment funds, including Main Street Mezzanine Fund, LP (“MSMF”) and Main Street Capital III, LP (“MSC III” and, together with MSMF, the “Funds”), and each of their general partners. The Funds are each licensed as a Small Business Investment Company (“SBIC”) by the United States Small Business Administration (“SBA”). MSC Adviser I, LLC (the “External Investment Manager”) was formed in November 2013 as a wholly-owned subsidiary of Main Street to provide investment management and other services to parties other than Main Street (“External Parties”) and receives fee income for such services. MSCC has been granted no-action relief by the Securities and Exchange Commission (“SEC”) to allow the External Investment Manager to register as a registered investment adviser under the Investment Advisers Act of 1940, as amended. Since the External Investment Manager conducts all of its investment management activities for External Parties, it is accounted for as a portfolio investment of Main Street and is not included as a consolidated subsidiary in Main Street’s consolidated financial statements. MSCC has elected to be treated for U.S. federal income tax purposes as a regulated investment company (“RIC”) under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”). As a result, MSCC generally does not pay corporate-level U.S. federal income taxes on any net ordinary taxable income or capital gains that it distributes to its stockholders. Main Street has certain direct and indirect wholly-owned subsidiaries that have elected to be taxable entities (the “Taxable Subsidiaries”). The primary purpose of the Taxable Subsidiaries is to permit MSCC to hold equity investments in portfolio companies which are “pass-through” entities for tax purposes. MSCC also has certain direct and indirect wholly-owned subsidiaries formed for financing purposes (the “Structured Subsidiaries”). Unless otherwise noted or the context otherwise indicates, the terms “we,” “us,” “our,” the “Company” and “Main Street” refer to MSCC and its consolidated subsidiaries, which include the Funds, the Taxable Subsidiaries and the Structured Subsidiaries. 2. Basis of Presentation Main Street’s consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”). The Company is an investment company following accounting and reporting guidance in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 946, Financial Services—Investment Companies (“ASC 946”). For each of the periods presented herein, Main Street’s consolidated financial statements include the accounts of MSCC and its consolidated subsidiaries. The Investment Portfolio, as used herein, refers to all of Main Street’s investments in LMM portfolio companies, investments in Private Loan portfolio companies, investments in Middle Market portfolio companies, Other Portfolio investments and the investment in the External Investment Manager (see Note C — Fair Value Hierarchy for Investments — Portfolio Composition — Investment Portfolio Composition for additional discussion of Main Street’s Investment Portfolio and definitions for the defined terms Private Loan and Other Portfolio). Main Street’s results of operations for the three and six months ended June 30, 2023 and 2022, cash flows for the six months ended June 30, 2023 and 2022, and financial position as of June 30, 2023 and December 31, 2022, are presented on a consolidated basis. The effects of all intercompany transactions between MSCC and its consolidated subsidiaries have been eliminated in consolidation. The accompanying unaudited consolidated financial statements of Main Street are presented in conformity with U.S. GAAP for interim financial information and pursuant to the requirements for reporting on Form 10-Q and Articles 6, 10 and 12 of Regulation S-X. Accordingly, certain disclosures accompanying annual consolidated financial statements prepared in accordance with U.S. GAAP are omitted. The unaudited consolidated financial statements and notes should be read in conjunction with the audited financial statements and notes thereto for the year ended December 31, 2022. In the opinion of management, the unaudited consolidated financial results included herein contain all adjustments, consisting solely of normal recurring accruals, considered necessary for the fair presentation of financial statements for the interim periods included herein. The results of operations for the three and six months ended June 30, 2023 are not necessarily indicative of the operating results to be expected for the full year. Financial statements prepared on a U.S. GAAP basis require management to make estimates and assumptions that affect the amounts and disclosures reported in the consolidated financial statements and accompanying notes. Such estimates and assumptions could change in the future as more information becomes known, which could impact the amounts reported and disclosed herein. Principles of Consolidation Under ASC 946, Main Street is precluded from consolidating other entities in which Main Street has equity investments, including those in which it has a controlling interest, unless the other entity is another investment company. An exception to this general principle in ASC 946 occurs if Main Street holds a controlling interest in an operating company that provides all or substantially all of its services directly to Main Street. Accordingly, as noted above, MSCC’s consolidated financial statements include the financial position and operating results for the Funds, the Taxable Subsidiaries and the Structured Subsidiaries. Main Street has determined that none of its portfolio investments qualify for this exception, including the investment in the External Investment Manager. Therefore, Main Street’s Investment Portfolio is carried on the Consolidated Balance Sheets at fair value, as discussed further in Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio , with any adjustments to fair value recognized as “Net Unrealized Appreciation (Depreciation)” until the investment is realized, usually upon exit, resulting in any gain or loss being recognized as a “Net Realized Gain (Loss),” in both cases on the Consolidated Statements of Operations. Portfolio Investment Classification Main Street classifies its Investment Portfolio in accordance with the requirements of the 1940 Act. Under the 1940 Act, (a) “Control Investments” are defined as investments in which Main Street owns more than 25% of the voting securities or has rights to maintain greater than 50% of the board representation, (b) “Affiliate Investments” are defined as investments in which Main Street owns between 5% and 25% (inclusive) of the voting securities and does not have rights to maintain greater than 50% of the board representation and (c) “Non-Control/Non-Affiliate Investments” are defined as investments that are neither Control Investments nor Affiliate Investments. For purposes of determining the classification of its Investment Portfolio, Main Street has excluded consideration of any voting securities or board appointment rights held by third-party investment funds advised by the External Investment Manager.

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	6 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Jun. 30, 2023
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES 1. Valuation of the Investment Portfolio Main Street accounts for its Investment Portfolio at fair value. As a result, Main Street follows the provisions of ASC 820, Fair Value Measurements and Disclosures (“ASC 820”). ASC 820 defines fair value, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value and enhances disclosure requirements for fair value measurements. ASC 820 requires Main Street to assume that the portfolio investment is to be sold in the principal market to independent market participants, which may be a hypothetical market. Market participants are defined as buyers and sellers in the principal market that are independent, knowledgeable and willing and able to transact. Main Street’s portfolio strategy calls for it to invest primarily in illiquid debt and equity securities issued by privately held, LMM companies and debt securities issued by Middle Market companies that are generally larger in size than the LMM companies and that can be more liquid than the debt securities issued by LMM companies. Main Street categorizes some of its investments in LMM companies and Middle Market companies as Private Loan portfolio investments, which are primarily debt securities in privately held companies that have primarily been originated directly by Main Street or, to a lesser extent, through its strategic relationships with other investment funds on a collaborative basis through investments that are often referred to in the debt markets as “club deals” because of the small lender group size. In both cases, Main Street’s Private Loan investments are typically made to support a company owned by or in the process of being acquired by a private equity sponsor. Private Loan investments are made in companies that are consistent with the size of companies Main Street invests in through its LMM portfolio and Middle Market portfolio. Main Street’s portfolio also includes Other Portfolio investments which primarily consist of investments that are not consistent with the typical profiles for its LMM, Private Loan or Middle Market portfolio investments, including investments which may be managed by third parties. Main Street’s portfolio may also include short-term portfolio investments that are atypical of Main Street’s LMM, Private Loan and Middle Market portfolio investments in that they are intended to be a short-term deployment of capital and are more liquid than investments within the other portfolios. Main Street’s portfolio investments may be subject to restrictions on resale. LMM investments and Other Portfolio investments generally have no established trading market, while Private Loan investments may include investments which have no established market or have established markets that are not active. Middle Market and short-term portfolio investments generally have established markets that are not active. Main Street determines in good faith the fair value of its Investment Portfolio pursuant to a valuation policy in accordance with ASC 820, with such valuation process approved by its Board of Directors and in accordance with the 1940 Act. Main Street’s valuation policies and processes are intended to provide a consistent basis for determining the fair value of Main Street’s Investment Portfolio. For LMM portfolio investments, Main Street generally reviews external events, including private mergers, sales and acquisitions involving comparable companies, and includes these events in the valuation process by using an enterprise value waterfall methodology (“Waterfall”) for its LMM equity investments and an income approach using a yield-to-maturity model (“Yield-to-Maturity”) valuation method for its LMM debt investments. For Private Loan and Middle Market portfolio investments in debt securities for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value the investment in a current hypothetical sale using the Yield-to-Maturity valuation method. For Middle Market and short-term portfolio investments in debt securities for which it has determined that third-party quotes or other independent prices are available, Main Street primarily uses quoted prices in the valuation process. Main Street determines the appropriateness of the use of third-party broker quotes, if any, in determining fair value based on its understanding of the level of actual transactions used by the broker to develop the quote and whether the quote was an indicative price or binding offer, the depth and consistency of broker quotes and the correlation of changes in broker quotes with underlying performance of the portfolio company and other market indices. For its Other Portfolio equity investments, Main Street generally calculates the fair value of the investment primarily based on the net asset value (“NAV”) of the fund and adjusts the fair value for other factors deemed relevant that would affect the fair value of the investment. All of the valuation approaches for Main Street’s portfolio investments estimate the value of the investment as if Main Street were to sell, or exit, the investment as of the measurement date. These valuation approaches consider the value associated with Main Street’s ability to control the capital structure of the portfolio company, as well as the timing of a potential exit. For valuation purposes, “control” portfolio investments are composed of debt and equity securities in companies for which Main Street has a controlling interest in the equity ownership of the portfolio company or the ability to nominate a majority of the portfolio company’s board of directors. For valuation purposes, “non-control” portfolio investments are generally composed of debt and equity securities in companies for which Main Street does not have a controlling interest in the equity ownership of the portfolio company or the ability to nominate a majority of the portfolio company’s board of directors. Under the Waterfall valuation method, Main Street estimates the enterprise value of a portfolio company using a combination of market and income approaches or other appropriate valuation methods, such as considering recent transactions in the equity securities of the portfolio company or third-party valuations of the portfolio company, and then performs a Waterfall calculation by allocating the enterprise value over the portfolio company’s securities in order of their preference relative to one another. The enterprise value is the fair value at which an enterprise could be sold in a transaction between two willing parties, other than through a forced or liquidation sale. Typically, privately held companies are bought and sold based on multiples of earnings before interest, taxes, depreciation and amortization (“EBITDA”), cash flows, net income, revenues, or in limited cases, book value. There is no single methodology for estimating enterprise value. For any one portfolio company, enterprise value is generally described as a range of values from which a single estimate of enterprise value is derived. In estimating the enterprise value of a portfolio company, Main Street analyzes various factors including the portfolio company’s historical and projected financial results. Due to SEC deadlines for Main Street’s quarterly and annual financial reporting, the operating results of a portfolio company used in the current period valuation are generally the results from the period ended three months prior to such valuation date and may include unaudited, projected, budgeted or pro forma financial information and may require adjustments for non-recurring items or to normalize the operating results that may require significant judgment in determining. In addition, projecting future financial results requires significant judgment regarding future growth assumptions. In evaluating the operating results, Main Street also analyzes the impact of exposure to litigation, loss of customers or other contingencies. After determining the appropriate enterprise value, Main Street allocates the enterprise value to investments in order of the legal priority of the various components of the portfolio company’s capital structure. In applying the Waterfall valuation method, Main Street assumes the loans are paid-off at the principal amount in a change in control transaction and are not assumed by the buyer, which Main Street believes is consistent with its past transaction history and standard industry practices. Under the Yield-to-Maturity valuation method, Main Street also uses the income approach to determine the fair value of debt securities based on projections of the discounted future free cash flows that the debt security will likely generate, including analyzing the discounted cash flows of interest and principal amounts for the debt security, as set forth in the associated loan agreements, as well as the financial position and credit risk of the portfolio company. Main Street’s estimate of the expected repayment date of its debt securities is generally the maturity date of the instrument, as Main Street generally intends to hold its loans and debt securities to maturity. The Yield-to-Maturity analysis also considers changes in leverage levels, credit quality, portfolio company performance, changes in market-based interest rates and other factors. Main Street will generally use the value determined by the Yield-to-Maturity analysis as the fair value for that security; however, because of Main Street’s general intent to hold its loans to maturity, the fair value will not exceed the principal amount of the debt security valued using the Yield-to-Maturity valuation method. A change in the assumptions that Main Street uses to estimate the fair value of its debt securities using the Yield-to-Maturity valuation method could have a material impact on the determination of fair value. If there is deterioration in credit quality or if a debt security is in workout status, Main Street may consider other factors in determining the fair value of the debt security, including the value attributable to the debt security from the enterprise value of the portfolio company or the proceeds that would most likely be received in a liquidation analysis. Under the NAV valuation method, for an investment in an investment fund that does not have a readily determinable fair value, Main Street measures the fair value of the investment predominately based on the NAV of the investment fund as of the measurement date and adjusts the investment’s fair value for factors known to Main Street that would affect that fund’s NAV, including, but not limited to, fair values for individual investments held by the fund if Main Street holds the same investment or for a publicly traded investment. In addition, in determining the fair value of the investment, Main Street considers whether adjustments to the NAV are necessary in certain circumstances, based on the analysis of any restrictions on redemption of Main Street’s investment as of the measurement date, recent actual sales or redemptions of interests in the investment fund, and expected future cash flows available to equity holders, including the rate of return on those cash flows compared to an implied market return on equity required by market participants, or other uncertainties surrounding Main Street’s ability to realize the full NAV of its interests in the investment fund. Pursuant to its internal valuation process and the requirements under the 1940 Act, Main Street performs valuation procedures on each of its portfolio investments quarterly. In addition to its internal valuation process, in arriving at estimates of fair value for its investments in its LMM portfolio companies, Main Street, among other things, consults with a nationally recognized independent financial advisory services firm (the “Financial Advisory Firm”). The Financial Advisory Firm analyzes and provides observations, recommendations and an assurance certification regarding the Company’s determinations of the fair value of its LMM portfolio company investments. The Financial Advisory Firm is generally consulted relative to Main Street’s investments in each LMM portfolio company at least once every calendar year, and for Main Street’s investments in new LMM portfolio companies, at least once in the twelve-month period subsequent to the initial investment. In certain instances, Main Street may determine that it is not cost-effective, and as a result is not in its stockholders’ best interest, to consult with the Financial Advisory Firm on its investments in one or more LMM portfolio companies. Such instances include, but are not limited to, situations where the fair value of Main Street’s investment in a LMM portfolio company is determined to be insignificant relative to the total Investment Portfolio. Main Street consulted with and received an assurance certification from the Financial Advisory Firm in arriving at Main Street’s determination of fair value on its investments in a total of 37 LMM portfolio companies for the six months ended June 30, 2023, representing 52% of the total LMM portfolio at fair value as of June 30, 2023, and on a total of 36 LMM portfolio companies for the six months ended June 30, 2022, representing 54% of the total LMM portfolio at fair value as of June 30, 2022. Excluding its investments in LMM portfolio companies that, as of June 30, 2023 and 2022, as applicable, had not been in the Investment Portfolio for at least twelve months subsequent to the initial investment or whose primary purpose is to own real estate for which a third-party appraisal is obtained on at least an annual basis, the percentage of the LMM portfolio reviewed and certified by the Financial Advisory Firm for the six months ended June 30, 2023 and 2022 was 55% and 61% of the total LMM portfolio at fair value, respectively. For valuation purposes, all of Main Street’s Private Loan portfolio investments are non-control investments. For Private Loan portfolio investments for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value such Private Loan debt investments in a current hypothetical sale using the Yield-to-Maturity valuation method and such Private Loan equity investments in a current hypothetical sale using the Waterfall valuation method. In addition to its internal valuation process, in arriving at estimates of fair value for its investments in its Private Loan portfolio companies, Main Street, among other things, consults with the Financial Advisory Firm. The Financial Advisory Firm analyzes and provides observations and recommendations and an assurance certification regarding Main Street’s determinations of the fair value of its Private Loan portfolio company investments. The Financial Advisory Firm is generally consulted relative to Main Street’s investments in each Private Loan portfolio company at least once every calendar year, and for Main Street’s investments in new Private Loan portfolio companies, at least once in the twelve-month period subsequent to the initial investment. In certain instances, Main Street may determine that it is not cost-effective, and as a result is not in its stockholders’ best interest, to consult with the Financial Advisory Firm on its investments in one or more Private Loan portfolio companies. Such instances include, but are not limited to, situations where the fair value of Main Street’s investment in a Private Loan portfolio company is determined to be insignificant relative to the total Investment Portfolio. Main Street consulted with and received an assurance certification from the Financial Advisory Firm in arriving at its determination of fair value on its investments in a total of 33 Private Loan portfolio companies for the six months ended June 30, 2023, representing 49% of the total Private Loan portfolio at fair value as of June 30, 2023, and on a total of 29 Private Loan portfolio companies for the six months ended June 30, 2022, representing 44% of the total Private Loan portfolio at fair value as of June 30, 2022. Excluding its investments in Private Loan portfolio companies that, as of June 30, 2023 and 2022, as applicable, had not been in the Investment Portfolio for at least twelve months subsequent to the initial investment and its investments in Private Loan portfolio companies that were not reviewed because the investment is valued based upon third-party quotes or other independent pricing, the percentage of the Private Loan portfolio reviewed and certified by the Financial Advisory Firm for the six months ended June 30, 2023 and 2022 was 53% and 67% of the total Private Loan portfolio at fair value, respectively. For valuation purposes, all of Main Street’s Middle Market portfolio investments are non-control investments. To the extent sufficient observable inputs are available to determine fair value, Main Street uses observable inputs to determine the fair value of these investments through obtaining third-party quotes or other independent pricing. For Middle Market portfolio investments for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value such Middle Market debt investments in a current hypothetical sale using the Yield-to-Maturity valuation method and such Middle Market equity investments in a current hypothetical sale using the Waterfall valuation method. Main Street generally consults on a limited basis with the Financial Advisory Firm in connection with determining the fair value of its Middle Market portfolio investments due to the nature of these investments. The vast majority (90% and 89% as of June 30, 2023 and December 31, 2022, respectively) of the Middle Market portfolio investments (i) are valued using third-party quotes or other independent pricing services, (ii) Main Street has consulted with and received an assurance certification from the Financial Advisory Firm within the last twelve months or (iii) are new investments that have not been in the Investment Portfolio for at least twelve months subsequent to the initial investment. For valuation purposes, all of Main Street’s short-term portfolio investments are non-control investments. To the extent sufficient observable inputs are available to determine fair value, Main Street uses observable inputs to determine the fair value of these investments through obtaining third-party quotes or other independent pricing. Because all of the short-term portfolio investments are typically valued using third-party quotes or other independent pricing services, Main Street generally does not consult with any financial advisory services firms in connection with determining the fair value of its short-term portfolio investments. For valuation purposes, all of Main Street’s Other Portfolio investments are non-control investments. Main Street’s Other Portfolio investments comprised 2.6% and 2.8% of Main Street’s Investment Portfolio at fair value as of June 30, 2023 and December 31, 2022, respectively. Similar to the LMM investment portfolio, market quotations for Other Portfolio equity investments are generally not readily available. For its Other Portfolio equity investments, Main Street generally determines the fair value of these investments using the NAV valuation method. For valuation purposes, Main Street’s investment in the External Investment Manager is a control investment. Market quotations are not readily available for this investment, and as a result, Main Street determines the fair value of the External Investment Manager using the Waterfall valuation method under the market approach. In estimating the enterprise value, Main Street analyzes various factors, including the entity’s historical and projected financial results, as well as its size, marketability and performance relative to the population of market comparables. This valuation approach estimates the value of the investment as if Main Street were to sell, or exit, the investment. In addition, Main Street considers its ability to control the capital structure of the company, as well as the timing of a potential exit, in connection with determining the fair value of the External Investment Manager. Main Street consults with and receives an assurance certification from the Financial Advisory Firm in arriving at its determination of fair value for its investment in the External Investment Adviser on a quarterly basis. Due to the inherent uncertainty in the valuation process, Main Street’s determination of fair value for its Investment Portfolio may differ materially from the values that would have been determined had a ready market for the securities existed. In addition, changes in the market environment, portfolio company performance and other events that may occur over the lives of the investments may cause the gains or losses ultimately realized on these investments to be materially different than the valuations currently assigned. Main Street determines the fair value of each individual investment and records changes in fair value as unrealized appreciation or depreciation. Main Street uses an internally developed portfolio investment rating system in connection with its investment oversight, portfolio management and analysis and investment valuation procedures for its LMM, Private Loan and Middle Market portfolio companies. This system takes into account both quantitative and qualitative factors of each LMM, Private Loan and Middle Market portfolio company. In December 2020, the SEC adopted Rule 2a-5 under the 1940 Act, which permits a BDC’s board of directors to designate its executive officers or investment adviser as a valuation designee to determine the fair value for its investment portfolio, subject to the active oversight of the board. Main Street’s Board of Directors has approved policies and procedures pursuant to Rule 2a-5 (the “Valuation Procedures”) and has designated a group of its executive officers to serve as the Board of Directors’ valuation designee. Main Street believes its Investment Portfolio as of June 30, 2023 and December 31, 2022 approximates fair value as of those dates based on the markets in which it operates and other conditions in existence on those reporting dates. 2. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. Actual results may differ from these estimates under different conditions or assumptions. Additionally, as explained in Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio , the consolidated financial statements include investments in the Investment Portfolio whose values have been estimated by Main Street, pursuant to valuation policies and procedures approved and overseen by Main Street’s Board of Directors, in the absence of readily ascertainable market values. Because of the inherent uncertainty of the Investment Portfolio valuations, those estimated values may differ materially from the values that would have been determined had a ready market for the securities existed. Macroeconomic factors, including pandemics, risk of recession, inflation, supply chain constraints or disruptions, geopolitical disruptions and rising market index interest rates, and the related effect on the U.S. and global economies, have impacted, and may continue to impact, the businesses and operating results of certain of Main Street’s portfolio companies. As a result of these and other current effects of macroeconomic factors, as well as the uncertainty regarding the extent and duration of their impact, the valuation of Main Street’s Investment Portfolio has and may continue to experience increased volatility. 3. Cash and Cash Equivalents Cash and cash equivalents consist of cash and highly liquid investments with an original maturity of three months or less at the date of purchase. Cash and cash equivalents are carried at cost, which approximates fair value. At June 30, 2023 and December 31, 2022, cash balances totaling $46.0 million (excluding amounts invested in AAA rated money market funds) and $46.3 million, respectively, exceeded Federal Deposit Insurance Corporation insurance protection levels, subjecting the Company to risk related to the uninsured balance. All of the Company’s cash deposits are held at large established high credit quality financial institutions, and management believes that the risk of loss associated with any uninsured balances is remote. 4. Interest, Dividend and Fee Income Main Street records interest and dividend income on the accrual basis to the extent amounts are expected to be collected. Dividend income is recorded when dividends are declared by the portfolio company or at such other time that an obligation exists for the portfolio company to make a distribution. Main Street evaluates accrued interest and dividend income periodically for collectability. When a loan or debt security becomes 90 days or more past due, and if Main Street otherwise does not expect the debtor to be able to service its debt obligation, Main Street will generally place the loan or debt security on non-accrual status and cease recognizing interest income on that loan or debt security until the borrower has demonstrated the ability and intent to pay contractual amounts due. If a loan or debt security’s status significantly improves regarding the debtor’s ability to service the debt obligation, or if a loan or debt security is sold or written off, Main Street removes it from non-accrual status. As of June 30, 2023, Main Street’s total Investment Portfolio had nine investments on non-accrual status, which comprised 0.3% of its fair value and 1.7% of its cost. As of December 31, 2022, Main Street’s total Investment Portfolio had 12 investments on non-accrual status, which comprised 0.6% of its fair value and 3.7% of its cost. Main Street holds certain debt and preferred equity instruments in its Investment Portfolio that contain payment-in-kind (“PIK”) interest and cumulative dividend provisions. The PIK interest, computed at the contractual rate specified in each debt agreement, is periodically added to the principal balance of the debt and is recorded as interest income. Thus, the actual collection of this interest may be deferred until the time of debt principal repayment. Cumulative dividends are recorded as dividend income, and any dividends in arrears are added to the balance of the preferred equity investment. The actual collection of these dividends in arrears may be deferred until such time as the preferred equity is redeemed or sold. To maintain RIC tax treatment (as discussed in Note B.9. — Summary of Significant Accounting Policies — Income Taxes below), these non-cash sources of income may need to be paid out to stockholders in the form of distributions, even though Main Street may not have collected the PIK interest and cumulative dividends in cash. Main Street stops accruing PIK interest and cumulative dividends and writes off any accrued and uncollected interest and dividends in arrears when it determines that such PIK interest and dividends in arrears are no longer collectible. For the three months ended June 30, 2023 and 2022, (i) 1.8% and 1.7%, respectively, of Main Street’s total investment income was attributable to PIK interest income not paid currently in cash and (ii) 0.2% and 0.2%, respectively, of Main Street’s total investment income was attributable to cumulative dividend income not paid currently in cash. For the six months ended June 30, 2023 and 2022, (i) 2.1% and 1.4%, respectively, of Main Street’s total investment income was attributable to PIK interest income not paid currently in cash and (ii) 0.3% and 0.6%, respectively, of Main Street’s total investment income was attributable to cumulative dividend income not paid currently in cash. Main Street may periodically provide services, including structuring and advisory services, to its portfolio companies or other third parties. For services that are separately identifiable and evidence exists to substantiate fair value, fee income is recognized as earned, which is generally when the investment or other applicable transaction closes. Fees received in connection with debt financing transactions for services that do not meet these criteria are treated as debt origination fees and are generally deferred and accreted into income over the life of the financing. A presentation of total investment income Main Street received from its Investment Portfolio in each of the periods presented is as follows: Three Months Ended Six Months Ended 2023 2022 2023 2022 (dollars in thousands) Interest, fee and dividend income: Interest income $ 97,273 $ 63,984 $ 190,666 $ 123,426 Dividend income 25,599 17,913 49,821 34,535 Fee income 4,711 3,303 7,351 6,635 Total interest, fee and dividend income $ 127,583 $ 85,200 $ 247,838 $ 164,596 5. Deferred Financing Costs Deferred financing costs include commitment fees and other direct costs related to Main Street’s multi-year revolving credit facility (the “Corporate Facility”) and special purpose vehicle revolving credit facility (the “SPV Facility” and, together with the Corporate Facility, the “Credit Facilities”) and its unsecured notes, as well as the commitment fees and leverage fees (3.4% of the total commitment and draw amounts, as applicable) on the SBIC debentures. See further discussion of Main Street’s debt in Note E — Debt . Deferred financing costs in connection with the Credit Facilities are capitalized as an asset. Deferred financing costs in connection with all other debt arrangements are a direct deduction from the principal amount outstanding. 6. Equity Offering Costs The Company’s offering costs are charged against the proceeds from equity offerings when the proceeds are received. 7. Unearned Income—Debt Origination Fees and Original Issue Discount and Discounts / Premiums to Par Value Main Street capitalizes debt origination fees received in connection with financings and reflects such fees as unearned income netted against the applicable debt investments. The unearned income from the fees is accreted into income over the life of the financing. In connection with its portfolio debt investments, Main Street sometimes receives nominal cost warrants or warrants with an exercise price below the fair value of the underlying equity (together, “nominal cost equity”) that are valued as part of the negotiation process with the particular portfolio company. When Main Street receives nominal cost equity, it allocates its cost basis in its investment between its debt security and its nominal cost equity at the time of origination based on amounts negotiated with the particular portfolio company. The allocated amounts are based upon the fair value of the nominal cost equity, which is then used to determine the allocation of cost to the debt security. Any discount recorded on a debt investment resulting from this allocation is reflected as unearned income, which is netted against the applicable debt investment, and accreted into interest income over the life of the debt investment. The actual collection of this interest is deferred until the time of debt principal repayment. Main Street may also purchase debt securities at a discount or at a premium to the par value of the debt security. In the case of a purchase at a discount, Main Street records the investment at the par value of the debt security net of the discount, and the discount is accreted into interest income over the life of the debt investment. In the case of a purchase at a premium, Main Street records the investment at the par value of the debt security plus the premium, and the premium is amortized as a reduction to interest income over the life of the debt investment. To maintain RIC tax treatment (as discussed in Note B.9. — Summary of Significant A

FAIR VALUE HIERARCHY FOR INVEST

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION	6 Months Ended
FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION	Jun. 30, 2023
Fair Value Disclosures [Abstract]
FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION	FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION ASC 820 defines fair value, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value, and enhances disclosure requirements for fair value measurements. Main Street accounts for its investments at fair value. Fair Value Hierarchy In accordance with ASC 820, Main Street has categorized its investments based on the priority of the inputs to the valuation technique into a three-level fair value hierarchy. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical investments (Level 1) and the lowest priority to unobservable inputs (Level 3). Investments recorded on Main Street’s Consolidated Balance Sheets are categorized based on the inputs to the valuation techniques as follows: Level 1—Investments whose values are based on unadjusted quoted prices for identical assets in an active market that Main Street has the ability to access (examples include investments in active exchange-traded equity securities and investments in most U.S. government and agency securities). Level 2—Investments whose values are based on quoted prices in markets that are not active or model inputs that are observable either directly or indirectly for substantially the full term of the investment. Level 2 inputs include the following: • Quoted prices for similar assets in active markets (for example, investments in restricted stock); • Quoted prices for identical or similar assets in non-active markets (for example, investments in thinly traded public companies); • Pricing models whose inputs are observable for substantially the full term of the investment (for example, market interest rate indices); and • Pricing models whose inputs are derived principally from, or corroborated by, observable market data through correlation or other means for substantially the full term of the investment. Level 3—Investments whose values are based on prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement (for example, investments in illiquid securities issued by privately held companies). These inputs reflect management’s own assumptions about the assumptions a market participant would use in pricing the investment. As required by ASC 820, when the inputs used to measure fair value fall within different levels of the hierarchy, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement in its entirety. For example, a Level 3 fair value measurement may include inputs that are observable (Levels 1 and 2) and unobservable (Level 3). Therefore, unrealized appreciation and depreciation related to such investments categorized within the Level 3 tables below may include changes in fair value that are attributable to both observable inputs (Levels 1 and 2) and unobservable inputs (Level 3). As of June 30, 2023 and December 31, 2022, all of Main Street’s LMM portfolio investments consisted of illiquid securities issued by privately held companies and the fair value determination for these investments primarily consisted of unobservable inputs. As a result, all of Main Street’s LMM portfolio investments were categorized as Level 3 as of June 30, 2023 and December 31, 2022. As of June 30, 2023 and December 31, 2022, Main Street’s Private Loan portfolio investments primarily consisted of investments in interest-bearing secured debt investments. The fair value determination for these investments consisted of a combination of observable inputs in non-active markets for which sufficient observable inputs were not available to determine the fair value of these investments and unobservable inputs. As a result, all of Main Street’s Private Loan portfolio investments were categorized as Level 3 as of June 30, 2023 and December 31, 2022. As of June 30, 2023 and December 31, 2022, Main Street’s Middle Market portfolio investments consisted primarily of investments in secured and unsecured debt investments and independently rated debt investments. The fair value determination for these investments consisted of a combination of observable inputs in non-active markets for which sufficient observable inputs were not available to determine the fair value of these investments and unobservable inputs. As a result, all of Main Street’s Middle Market portfolio investments were categorized as Level 3 as of June 30, 2023 and December 31, 2022. As of June 30, 2023 and December 31, 2022, Main Street’s Other Portfolio investments consisted of illiquid securities issued by privately held entities and the fair value determination for these investments primarily consisted of unobservable inputs. As a result, all of Main Street’s Other Portfolio investments were categorized as Level 3 as of June 30, 2023 and December 31, 2022. As of December 31, 2022, Main Street held one short-term portfolio investment, which was a secured debt investment. The fair value determination for this investment consisted of available observable inputs in non-active markets sufficient to determine the fair value of the investment. As a result, Main Street’s short-term portfolio investment was categorized as Level 2 as of December 31, 2022. The fair value determination of each portfolio investment categorized as Level 3 required one or more of the following unobservable inputs: • Financial information obtained from each portfolio company, including unaudited statements of operations and balance sheets for the most recent period available as compared to budgeted numbers; • Current and projected financial condition of the portfolio company; • Current and projected ability of the portfolio company to service its debt obligations; • Type and amount of collateral, if any, underlying the investment; • Current financial ratios (e.g., fixed charge coverage ratio, interest coverage ratio and net debt/EBITDA ratio) applicable to the investment; • Current liquidity of the investment and related financial ratios (e.g., current ratio and quick ratio); • Pending debt or capital restructuring of the portfolio company; • Projected operating results of the portfolio company; • Current information regarding any offers to purchase the investment; • Current ability of the portfolio company to raise any additional financing as needed; • Changes in the economic environment which may have a material impact on the operating results of the portfolio company; • Internal occurrences that may have an impact (both positive and negative) on the operating performance of the portfolio company; • Qualitative assessment of key management; • Contractual rights, obligations or restrictions associated with the investment; and • Other factors deemed relevant. The use of significant unobservable inputs creates uncertainty in the measurement of fair value as of the reporting date. The significant unobservable inputs used in the fair value measurement of Main Street’s LMM equity securities, which are generally valued through an average of the discounted cash flow technique and the market comparable/enterprise value technique (unless one of these approaches is determined to not be appropriate), are (i) EBITDA multiples and (ii) the weighted-average cost of capital (“WACC”). Significant increases (decreases) in EBITDA multiple inputs in isolation would result in a significantly higher (lower) fair value measurement. On the contrary, significant increases (decreases) in WACC inputs in isolation would result in a significantly lower (higher) fair value measurement. The significant unobservable inputs used in the fair value measurement of Main Street’s LMM, Private Loan and Middle Market securities are (i) risk adjusted discount rates used in the Yield-to-Maturity valuation technique (see Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio ) and (ii) the percentage of expected principal recovery. Significant increases (decreases) in any of these discount rates in isolation would result in a significantly lower (higher) fair value measurement. Significant increases (decreases) in any of these expected principal recovery percentages in isolation would result in a significantly higher (lower) fair value measurement. However, due to the nature of certain investments, fair value measurements may be based on other criteria, such as third-party appraisals of collateral and fair values as determined by independent third parties, which are not presented in the tables below. The following tables provide a summary of the significant unobservable inputs used to fair value Main Street’s Level 3 portfolio investments as of June 30, 2023 and December 31, 2022: Type of Fair Value as of June 30, 2023 (in thousands) Valuation Technique Significant Unobservable Inputs Range(3) Weighted Average(3) Median(3) Equity investments $ 1,279,510 Discounted cash flow WACC 9.2% - 22.3% 14.4 % 15.1 % Market comparable / Enterprise value EBITDA multiple (1) 4.5x - 8.4x (2) 6.7x 6.1x Debt investments $ 2,718,508 Discounted cash flow Risk adjusted discount factor 6.1% - 16.8% (2) 10.4 % 11.0 % Expected principal recovery percentage 0.0% - 100.0% 99.7 % 100.0 % Debt investments $ 212,525 Market approach Third-party quote 4.0 - 97.5 88.4 94.0 Total Level 3 investments $ 4,210,543 ____________________ (1) EBITDA may include proforma adjustments and/or other addbacks based on specific circumstances related to each investment. (2) Range excludes outliers that are greater than one standard deviation from the mean. Including these outliers, the range for EBITDA multiple is 2.0x - 15.7x and the range for risk adjusted discount factor is 3.8% - 33.5%. (3) Does not include investments for which the valuation technique does not include the use of the applicable fair value input. Type of Investment Fair Value as of December 31, 2022 (in thousands) Valuation Technique Significant Unobservable Inputs Range(3) Weighted Average(3) Median(3) Equity investments $ 1,172,077 Discounted cash flow WACC 9.4% - 22.5% 14.5 % 15.4 % Market comparable / Enterprise value EBITDA multiple (1) 4.3x - 8.3x (2) 6.7x 6.0x Debt investments $ 2,663,958 Discounted cash flow Risk adjusted discount factor 5.7% - 15.7% (2) 10.0 % 10.3 % Expected principal recovery percentage 0.0% - 100.0% 99.4 % 100.0 % Debt investments $ 264,238 Market approach Third-party quote 5.6 - 98.5 87.0 91.4 Total Level 3 investments $ 4,100,273 ____________________ (1) EBITDA may include proforma adjustments and/or other addbacks based on specific circumstances related to each investment. (2) Range excludes outliers that are greater than one standard deviation from the mean. Including these outliers, the range for EBITDA multiple is 2.0x - 15.7x and the range for risk adjusted discount factor is 3.8% - 43.3%. (3) Does not include investments for which the valuation technique does not include the use of the applicable fair value input. The following tables provide a summary of changes in fair value of Main Street’s Level 3 portfolio investments for the six-month periods ended June 30, 2023 and 2022 (amounts in thousands): Type of Investment Fair Value as of December 31, 2022 Transfers Into Level 3 Hierarchy Redemptions/ Repayments New Investments Net Changes from Unrealized to Realized Net Unrealized Appreciation (Depreciation) Other(1) Fair Value as of June 30, 2023 Debt $ 2,928,196 $ — $ (421,050) $ 376,859 $ 100,164 $ (23,390) $ (29,746) $ 2,931,033 Equity 1,166,643 — (35,199) 48,210 4,126 56,358 32,322 1,272,460 Equity Warrant 5,434 — — 2,091 — 2,101 (2,576) 7,050 $ 4,100,273 $ — $ (456,249) $ 427,160 $ 104,290 $ 35,069 $ — $ 4,210,543 ____________________ (1) Includes the impact of non-cash conversions. These transactions represent non-cash investing activities. See additional cash flow information in the Consolidated Statements of Cash Flows. Type of Investment Fair Value as of December 31, 2021 Transfers Into Level 3 Hierarchy Redemptions/ Repayments New Investments Net Changes from Unrealized to Realized Net Unrealized Appreciation (Depreciation) Other(1) Fair Value as of June 30, 2022 Debt $ 2,509,568 $ — $ (351,315) $ 508,045 $ 3,656 $ (60,605) $ (1,333) $ 2,608,016 Equity 1,043,709 — (27,338) 34,765 (1,977) 51,451 1,333 1,101,943 Equity Warrant 6,560 — — — — (610) — 5,950 $ 3,559,837 $ — $ (378,653) $ 542,810 $ 1,679 $ (9,764) $ — $ 3,715,909 ____________________ (1) Includes the impact of non-cash conversions. These transactions represent non-cash investing activities. See additional cash flow information in the Consolidated Statements of Cash Flows. At June 30, 2023 and December 31, 2022, Main Street’s investments at fair value were categorized as follows in the fair value hierarchy for ASC 820 purposes: Fair Value Measurements (in thousands) At June 30, 2023 Fair Value Quoted Prices in Significant Other Significant LMM portfolio investments $ 2,170,226 $ — $ — $ 2,170,226 Private Loan portfolio investments 1,499,309 — — 1,499,309 Middle Market portfolio investments 295,854 — — 295,854 Other Portfolio investments 111,184 — — 111,184 External Investment Manager 133,970 — — 133,970 Total investments $ 4,210,543 $ — $ — $ 4,210,543 Fair Value Measurements (in thousands) At December 31, 2022 Fair Value Quoted Prices in Significant Other Significant LMM portfolio investments $ 2,060,459 $ — $ — $ 2,060,459 Private Loan portfolio investments 1,471,466 — — 1,471,466 Middle Market portfolio investments 329,119 — — 329,119 Other Portfolio investments 116,299 — — 116,299 External Investment Manager 122,930 — — 122,930 Short-term portfolio investments 1,904 — 1,904 — Total investments $ 4,102,177 $ — $ 1,904 $ 4,100,273 Investment Portfolio Composition Main Street’s principal investment objective is to maximize its portfolio’s total return by generating current income from its debt investments and current income and capital appreciation from its equity and equity-related investments, including warrants, convertible securities and other rights to acquire equity securities in a portfolio company. Main Street seeks to achieve its investment objective through its LMM, Private Loan and Middle Market investment strategies. Main Street’s LMM investment strategy is focused on investments in secured debt, equity warrants and direct equity investments in privately held, LMM companies based in the United States. Main Street’s LMM portfolio companies generally have annual revenues between $10 million and $150 million, and its LMM investments generally range in size from $5 million to $75 million. The LMM debt investments are typically secured by a first priority lien on the assets of the portfolio company, can include either fixed or floating rate terms and generally have a term of between five Main Street’s private loan (“Private Loan”) investment strategy is focused on investments in privately held companies that are generally consistent with the size of its LMM portfolio companies or Middle Market portfolio companies, and its Private Loan investments generally range in size from $10 million to $75 million. Main Street’s Private Loan investments primarily consist of debt securities that have primarily been originated directly by Main Street or, to a lesser extent, through its strategic relationships with other investment funds on a collaborative basis through investments that are often referred to in the debt markets as “club deals” because of the small lender group size. In both cases, our Private Loan investments are typically made to support a company owned by or in the process of being acquired by a private equity sponsor. Main Street’s Private Loan portfolio debt investments are generally secured by a first priority lien on the assets of the portfolio company and typically have a term of between three Main Street’s Middle Market investment strategy is focused on investments in syndicated loans to or debt securities in Middle Market companies, which Main Street defines as companies with annual revenues between $150 million and $1.5 billion, and its Middle Market investments generally range in size from $3 million to $25 million. Main Street’s Middle Market portfolio debt investments are generally secured by a first priority lien on the assets of the portfolio company and typically have an expected duration of between three Main Street’s other portfolio (“Other Portfolio”) investments primarily consist of investments that are not consistent with the typical profiles for its LMM, Private Loan or Middle Market portfolio investments, including investments which may be managed by third parties. In the Other Portfolio, Main Street may incur indirect fees and expenses in connection with investments managed by third parties, such as investments in other investment companies or private funds. For Other Portfolio investments, Main Street generally receives distributions related to the assets held by the portfolio company. Those assets are typically expected to be liquidated over a five Based upon Main Street’s liquidity and capital structure management activities, Main Street’s Investment Portfolio may also include short-term portfolio investments that are atypical of Main Street’s LMM, Private Loan and Middle Market portfolio investments in that they are intended to be a short-term deployment of capital. Those assets are typically expected to be liquidated in one year or less. These short-term portfolio investments are not expected to be a significant portion of the overall Investment Portfolio. Main Street’s external asset management business is conducted through its External Investment Manager. The External Investment Manager earns management fees based on the assets under management for External Parties and may earn incentive fees, or a carried interest, based on the performance of the assets managed. Main Street entered into an agreement with the External Investment Manager to share employees in connection with its asset management business generally, and specifically for its relationship with MSC Income Fund, Inc. (“MSC Income”). Through this agreement, Main Street shares employees with the External Investment Manager, including their related infrastructure, business relationships, management expertise and capital raising capabilities. Main Street allocates the related expenses to the External Investment Manager pursuant to the sharing agreement. Main Street’s total expenses for the three months ended June 30, 2023 and 2022 are net of expenses allocated to the External Investment Manager of $5.7 million and $3.5 million, respectively, and for the six months ended June 30, 2023 and 2022 of $10.7 million and $6.3 million, respectively. Investment income, consisting of interest, dividends and fees, can fluctuate dramatically due to various factors, including the level of new investment activity, repayments of debt investments or sales of equity interests. Investment income in any given year could also be highly concentrated among several portfolio companies. For the three and six months ended June 30, 2023 and 2022, Main Street did not record investment income from any single portfolio company in excess of 10% of total investment income. The following tables provide a summary of Main Street’s investments in the LMM, Private Loan and Middle Market portfolios as of June 30, 2023 and December 31, 2022 (this information excludes Other Portfolio investments, short-term portfolio investments and the External Investment Manager, which are discussed further below). As of June 30, 2023 LMM (a) Private Loan Middle Market (dollars in millions) Number of portfolio companies 79 88 28 Fair value $ 2,170.2 $ 1,499.3 $ 295.9 Cost $ 1,720.9 $ 1,519.9 $ 352.9 Debt investments as a % of portfolio (at cost) 72.0 % 96.1 % 92.9 % Equity investments as a % of portfolio (at cost) 28.0 % 3.9 % 7.1 % % of debt investments at cost secured by first priority lien 99.2 % 99.5 % 99.2 % Weighted-average annual effective yield (b) 12.9 % 12.6 % 11.8 % Average EBITDA (c) $ 8.0 $ 30.5 $ 67.6 ____________________ (a) At June 30, 2023, Main Street had equity ownership in all of its LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was 40%. (b) The weighted-average annual effective yields were computed using the effective interest rates for all debt investments at cost as of June 30, 2023, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status. The weighted-average annual effective yield on Main Street’s debt portfolio as of June 30, 2023 including debt investments on non-accrual status was 12.8% for its LMM portfolio, 12.3% for its Private Loan portfolio and 10.8% for its Middle Market portfolio. The weighted-average annual effective yield is not reflective of what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect changes in the market value of Main Street’s stock, Main Street’s utilization of debt capital in its capital structure, Main Street’s expenses or any sales load paid by an investor. (c) The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Private Loan and Middle Market portfolios. These calculations exclude certain portfolio companies, including two LMM portfolio companies and two Private Loan portfolio companies, as EBITDA is not a meaningful valuation metric for Main Street’s investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate. As of December 31, 2022 LMM (a) Private Loan Middle Market (dollars in millions) Number of portfolio companies 78 85 31 Fair value $ 2,060.5 $ 1,471.5 $ 329.1 Cost $ 1,719.9 $ 1,500.3 $ 401.7 Debt investments as a % of portfolio (at cost) 73.7 % 97.1 % 93.8 % Equity investments as a % of portfolio (at cost) 26.3 % 2.9 % 6.2 % % of debt investments at cost secured by first priority lien 99.1 % 99.6 % 98.8 % Weighted-average annual effective yield (b) 12.3 % 11.6 % 11.0 % Average EBITDA (c) $ 8.0 $ 38.1 $ 68.7 ____________________ (a) At December 31, 2022, Main Street had equity ownership in all of its LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was 41%. (b) The weighted-average annual effective yields were computed using the effective interest rates for all debt investments at cost as of December 31, 2022, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status. The weighted-average annual effective yield on Main Street’s debt portfolio as of December 31, 2022 including debt investments on non-accrual status was 11.6% for its LMM portfolio, 11.2% for its Private Loan portfolio and 10.3% for its Middle Market portfolio. The weighted-average annual effective yield is not reflective of what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect changes in the market value of Main Street’s stock, Main Street’s utilization of debt capital in its capital structure, Main Street’s expenses or any sales load paid by an investor. (c) The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Private Loan and Middle Market portfolios. These calculations exclude certain portfolio companies, including three LMM portfolio companies and two Private Loan portfolio companies, as EBITDA is not a meaningful valuation metric for Main Street’s investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate. For the three months ended June 30, 2023 and 2022, Main Street achieved an annualized total return on investments of 16.7% and 6.5%, respectively. For the six months ended June 30, 2023 and 2022, Main Street achieved an annualized total return on investments of 15.1% and 9.2%, respectively. For the year ended December 31, 2022, Main Street achieved a total return on investments of 11.1%. Total return on investments is calculated using the interest, dividend and fee income, as well as the realized and unrealized change in fair value of the Investment Portfolio for the specified period. Main Street’s total return on investments is not reflective of what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect changes in the market value of Main Street’s stock, Main Street’s utilization of debt capital in its capital structure, Main Street’s expenses or any sales load paid by an investor. As of June 30, 2023, Main Street had Other Portfolio investments in 15 entities, collectively totaling $111.2 million in fair value and $119.4 million in cost basis and which comprised 2.6% and 3.2% of Main Street’s Investment Portfolio at fair value and cost, respectively. As of December 31, 2022, Main Street had Other Portfolio investments in 14 entities, collectively totaling $116.3 million in fair value and $120.4 million in cost basis and which comprised 2.8% and 3.2% of Main Street’s Investment Portfolio at fair value and cost, respectively. As discussed further in Note A.1. — Organization and Basis of Presentation — Organization, Main Street holds an investment in the External Investment Manager, a wholly-owned subsidiary that is treated as a portfolio investment. As of June 30, 2023, this investment had a fair value of $134.0 million and a cost basis of $29.5 million, which comprised 3.2% and 0.8% of Main Street’s Investment Portfolio at fair value and cost, respectively. As of December 31, 2022, this investment had a fair value of $122.9 million and a cost basis of $29.5 million, which comprised 3.0% and 0.8% of Main Street’s Investment Portfolio at fair value and cost, respectively. The following tables summarize the composition of Main Street’s total combined LMM, Private Loan and Middle Market portfolio investments at cost and fair value by type of investment as a percentage of the total combined LMM, Private Loan and Middle Market portfolio investments, as of June 30, 2023 and December 31, 2022 (this information excludes Other Portfolio investments, short-term portfolio investments and the External Investment Manager, which are discussed above). Cost: June 30, 2023 December 31, 2022 First lien debt 83.8 % 85.0 % Equity 15.5 14.2 Second lien debt 0.3 0.3 Equity warrants 0.2 0.2 Other 0.2 0.3 100.0 % 100.0 % Fair Value: June 30, 2023 December 31, 2022 First lien debt 73.3 % 75.2 % Equity 25.9 24.1 Second lien debt 0.4 0.3 Equity warrants 0.2 0.1 Other 0.2 0.3 100.0 % 100.0 % The following tables summarize the composition of Main Street’s total combined LMM, Private Loan and Middle Market portfolio investments by geographic region of the United States and other countries at cost and fair value as a percentage of the total combined LMM, Private Loan and Middle Market portfolio investments, as of June 30, 2023 and December 31, 2022 (this information excludes Other Portfolio investments, short-term portfolio investments and the External Investment Manager). The geographic composition is determined by the location of the corporate headquarters of the portfolio company. Cost: June 30, 2023 December 31, 2022 West 25.6 % 28.5 % Northeast 21.6 19.0 Southwest 19.3 20.1 Midwest 16.0 16.3 Southeast 15.1 14.0 Other Non-United States 1.7 1.5 Canada 0.7 0.6 100.0 % 100.0 % Fair Value: June 30, 2023 December 31, 2022 West 26.2 % 28.7 % Southwest 21.3 21.4 Northeast 21.0 18.8 Midwest 16.3 16.6 Southeast 13.0 12.4 Other Non-United States 1.6 1.5 Canada 0.6 0.6 100.0 % 100.0 % Main Street’s LMM, Private Loan and Middle Market portfolio investments are in companies conducting business in a variety of industries. The following tables summarize the composition of Main Street’s total combined LMM, Private Loan and Middle Market portfolio investments by industry at cost and fair value as of June 30, 2023 and December 31, 2022 (this information excludes Other Portfolio investments, short-term portfolio investments and the External Investment Manager). Cost: June 30, 2023 December 31, 2022 Internet Software & Services 8.9 % 8.0 % Machinery 7.2 7.4 Commercial Services & Supplies 6.1 6.7 Construction & Engineering 5.7 5.8 Health Care Providers & Services 5.0 4.7 Diversified Consumer Services 4.9 4.5 IT Services 4.9 3.3 Professional Services 4.5 4.2 Distributors 4.2 5.1 Textiles, Apparel & Luxury Goods 3.3 1.9 Leisure Equipment & Products 3.1 4.5 Energy Equipment & Services 3.1 3.7 Tobacco 3.1 3.1 Computers & Peripherals 2.7 2.2 Specialty Retail 2.5 3.2 Media 2.4 2.4 Software 2.0 1.9 Building Products 1.8 1.9 Aerospace & Defense 1.8 2.3 Containers & Packaging 1.7 2.6 Diversified Telecommunication Services 1.7 1.9 Auto Components 1.6 1.7 Food Products 1.6 1.6 Electronic Equipment, Instruments & Components 1.6 1.6 Electrical Equipment 1.5 1.0 Communications Equipment 1.5 1.8 Diversified Financial Services 1.5 1.5 Internet & Catalog Retail 1.3 1.3 Health Care Equipment & Supplies 1.3 1.3 Food & Staples Retailing 1.1 1.2 Hotels, Restaurants & Leisure 1.1 1.1 Chemicals 1.0 1.1 Household Products 1.0 0.4 Other (1) 3.3 3.1 100.0 % 100.0 % ____________________ (1) Includes various industries with each industry individually less than 1.0% of the total combined LMM, Private Loan and Middle Market portfolio investments at each date. Fair Value: June 30, 2023 December 31, 2022 Machinery 8.3 % 8.4 % Internet Software & Services 7.4 6.8 Diversified Consumer Services 7.1 6.8 Construction & Engineering 5.6 5.7 Commercial Services & Supplies 5.2 6.1 Professional Services 5.1 3.8 Health Care Providers & Services 4.7 4.3 Distributors 4.5 5.5 IT Services 4.4 3.1 Computers & Peripherals 3.8 3.0 Tobacco 3.3 3.4 Specialty Retail 3.1 3.5 Media 2.9 3.0 Leisure Equipment & Products 2.8 4.0 Textiles, Apparel & Luxury Goods 2.8 1.8 Energy Equipment & Services 2.7 2.7 Software 2.1 2.1 Containers & Packaging 1.9 2.8 Aerospace & Defense 1.7 2.2 Food Products 1.7 1.8 Building Products 1.6 1.9 Electrical Equipment 1.6 1.0 Auto Components 1.5 1.6 Diversified Telecommunication Services 1.5 1.8 Diversified Financial Services 1.4 1.7 Internet & Catalog Retail 1.2 1.3 Construction Materials 1.1 1.0 Air Freight & Logistics 1.1 0.9 Health Care Equipment & Supplies 1.0 1.0 Chemicals 0.9 1.1 Food & Staples Retailing 0.8 1.1 Other (1) 5.2 4.8 100.0 % 100.0 % ____________________ (1) Includes various industries with each industry individually less than 1.0% of the total combined LMM, Private Loan and Middle Market portfolio investments at each date. At June 30, 2023 and December 31, 2022, Main Street had no portfolio investment that was greater than 10% of the Investment Portfolio at fair value. Unconsolidated Significant Subsidiaries In accordance with Rules 3-09 and 4-08(g) of Regulation S-X, Main Street must determine which of its unconsolidated controlled portfolio companies, if any, are considered “significant subsidiaries.” In evaluating its unconsolidated controlled portfolio companies in accordance with Regulation S-X, there are two tests that Main Street must utilize to determine if any of Main Street’s Control Investments (as defined in Note A–Organization and Basis of Presentation , including those unconsolidated portfolio companies defined as Control Investments in which Main Street does not own greater than 50% of the voting securities nor have rights to maintain greater than 50% of the board representation) are considered significant subsidiaries: the investment test and the income test. The investment test is generally measured by dividing Main Street’s investment in the Control Investment by the value of Main Street’s total investments. The income test is generally measured by dividing the absolute value of the combined sum of total investment income, net realized gain (loss) and net unrealized appreciation (depreciation) from the relevant Control Investment for the period being tested by the absolute value of Main Street’s change in net assets resulting from operations for the same period. Rules 3-09 and 4-08(g) of Regulation S-X require Main Street to include (1) separate audited financial statements of an unconsolidated majority-owned subsidiary (Control Investments in which Main Street owns greater than 50% of the voting securities) in an annual report and (2) summarized financial in

EXTERNAL INVESTMENT MANAGER

EXTERNAL INVESTMENT MANAGER	6 Months Ended
EXTERNAL INVESTMENT MANAGER	Jun. 30, 2023
Investment Company [Abstract]
External Investment Manager	EXTERNAL INVESTMENT MANAGER As discussed further in Note A.1. — Organization and Basis of Presentation — Organization and Note C — Fair Value Hierarchy for Investments — Portfolio Composition — Investment Portfolio Composition , the External Investment Manager provides investment management and other services to External Parties. The External Investment Manager is accounted for as a portfolio investment of MSCC since the External Investment Manager conducts all of its investment management activities for External Parties. The External Investment Manager serves as the investment adviser and administrator to MSC Income Fund, Inc. (“MSC Income”) pursuant to an Investment Advisory and Administrative Services Agreement entered into in October 2020 between the External Investment Manager and MSC Income (the “Advisory Agreement”). Under the Advisory Agreement, the External Investment Manager earns a 1.75% annual base management fee on MSC Income’s average total assets, an incentive fee equal to 20% of pre-investment fee net investment income above a specified investment return hurdle rate and a 20% incentive fee on cumulative net realized capital gains in exchange for providing advisory services to MSC Income. As described more fully in Note L — Related Party Transactions , the External Investment Manager also serves as the investment adviser and administrator to MS Private Loan Fund I, LP, a private investment fund with a strategy to co-invest with Main Street in Private Loan portfolio investments (the “Private Loan Fund”). The External Investment Manager entered into an Investment Management Agreement in December 2020 with the Private Loan Fund, pursuant to which the External Investment Manager provides investment advisory and management services to the Private Loan Fund in exchange for an asset-based fee and certain incentive fees. The External Investment Manager may also advise other clients, including funds and separately managed accounts, pursuant to advisory and services agreements with such clients in exchange for asset-based and incentive fees. The External Investment Manager provides administrative services for certain External Party clients that, to the extent not waived, are reported as administrative services fees. The administrative services fees generally represent expense reimbursements for a portion of the compensation, overhead and related expenses for certain professionals directly attributable to performing administrative services for clients. These fees are recognized as other revenue in the period in which the related services are rendered. Main Street determines the fair value of the External Investment Manager using the Waterfall valuation method under the market approach (see further discussion in Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio ). Any change in fair value of the investment in the External Investment Manager is recognized on Main Street’s Consolidated Statements of Operations in “Net Unrealized Appreciation (Depreciation) — Control investments.” The External Investment Manager is an indirect wholly-owned subsidiary of MSCC owned through a Taxable Subsidiary and is a disregarded entity for tax purposes. The External Investment Manager has entered into a tax sharing agreement with its Taxable Subsidiary owner. Since the External Investment Manager is accounted for as a portfolio investment of Main Street and is not included as a consolidated subsidiary of Main Street in its consolidated financial statements, and as a result of the tax sharing agreement with its Taxable Subsidiary owner, for financial reporting purposes the External Investment Manager is treated as if it is taxed at corporate income tax rates based on its taxable income and, as a result of its activities, may generate income tax expense or benefit. Main Street owns the External Investment Manager through the Taxable Subsidiary to allow MSCC to continue to comply with the “source-of-income” requirements contained in the RIC tax provisions of the Code. The taxable income, or loss, of the External Investment Manager may differ from its book income, or loss, due to temporary book and tax timing differences and permanent differences. As a result of the above described financial reporting and tax treatment, the External Investment Manager provides for any income tax expense, or benefit, and any tax assets or liabilities in its separate financial statements. Main Street shares employees with the External Investment Manager and allocates costs related to such shared employees to the External Investment Manager generally based on a combination of the direct time spent, new investment origination activity and assets under management, depending on the nature of the expense. The total contribution of the External Investment Manager to Main Street’s net investment income consists of the combination of the expenses allocated to the External Investment Manager and the dividend income earned from the External Investment Manager. For the three months ended June 30, 2023 and 2022, the total contribution to Main Street’s net investment income was $8.5 million and $5.2 million, respectively. For the six months ended June 30, 2023 and 2022, the total contribution to Main Street’s net investment income was $16.6 million and $10.3 million, respectively. Summarized financial information from the separate financial statements of the External Investment Manager as of June 30, 2023 and December 31, 2022 and for the three and six months ended June 30, 2023 and 2022 is as follows: As of June 30, As of December 31, 2022 (dollars in thousands) Accounts receivable - advisory clients $ 10,416 $ 8,130 Intangible Asset 29,500 29,500 Total assets $ 39,916 $ 37,630 Accounts payable to MSCC and its subsidiaries $ 7,557 $ 4,455 Dividend payable to MSCC and its subsidiaries 2,859 3,675 Equity 29,500 29,500 Total liabilities and equity $ 39,916 $ 37,630 Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (dollars in thousands) Management fee income $ 5,544 $ 5,421 $ 11,014 $ 10,865 Incentive fees 3,663 90 6,967 227 Administrative services fees 151 153 302 304 Total revenues 9,358 5,664 18,283 11,396 Expenses allocated from MSCC or its subsidiaries: Salaries, share-based compensation and other personnel costs (4,897) (2,653) (9,165) (4,913) Other G&A expenses (791) (809) (1,520) (1,366) Total allocated expenses (5,688) (3,462) (10,685) (6,279) Pre-tax income 3,670 2,202 7,598 5,117 Tax expense (811) (492) (1,683) (1,134) Net income $ 2,859 $ 1,710 $ 5,915 $ 3,983

DEBT

DEBT	6 Months Ended
DEBT	Jun. 30, 2023
Debt Disclosure [Abstract]
DEBT	DEBT Summary of debt as of June 30, 2023 is as follows: Outstanding Unamortized Debt Issuance (Costs)/Premiums (1) Recorded Value Estimated Fair Value (2) (dollars in thousands) Corporate Facility $ 410,000 $ — $ 410,000 $ 410,000 SPV Facility 170,000 — 170,000 170,000 July 2026 Notes 500,000 (1,601) 498,399 440,345 May 2024 Notes 450,000 454 450,454 442,926 SBIC Debentures 350,000 (6,057) 343,943 290,232 December 2025 Notes 150,000 (1,294) 148,706 153,929 Total Debt $ 2,030,000 $ (8,498) $ 2,021,502 $ 1,907,432 ____________________ (1) The unamortized debt issuance costs for the Credit Facilities are reflected as Deferred financing costs on the Consolidated Balance Sheets, while the deferred debt issuance costs related to the July 2026 Notes, May 2024 Notes, SBIC Debentures and December 2025 Notes are reflected as contra-liabilities on the Consolidated Balance Sheets. (2) Estimated fair value for outstanding debt if Main Street had adopted the fair value option under ASC 825. See discussion of the methods used to estimate the fair value of Main Street’s debt in Note B.11. — Summary of Significant Accounting Policies — Fair Value of Financial Instruments. Summary of debt as of December 31, 2022 is as follows: Outstanding Unamortized Debt Issuance (Costs)/Premiums (1) Recorded Value Estimated Fair Value (2) (dollars in thousands) Corporate Facility $ 407,000 $ — $ 407,000 $ 407,000 SPV Facility 200,000 — 200,000 200,000 July 2026 Notes 500,000 (1,864) 498,136 434,250 May 2024 Notes 450,000 727 450,727 444,749 SBIC Debentures 350,000 (6,086) 343,914 290,204 December 2025 Notes 100,000 (675) 99,325 106,607 Total Debt $ 2,007,000 $ (7,898) $ 1,999,102 $ 1,882,810 ____________________ (1) The unamortized debt issuance costs for the Credit Facilities are reflected as Deferred financing costs on the Consolidated Balance Sheets, while the deferred debt issuance costs related to the July 2026 Notes, May 2024 Notes, SBIC Debentures and December 2025 Notes are reflected as contra-liabilities on the Consolidated Balance Sheets. (2) Estimated fair value for outstanding debt if Main Street had adopted the fair value option under ASC 825. See discussion of the methods used to estimate the fair value of Main Street’s debt in Note B.11. — Summary of Significant Accounting Policies — Fair Value of Financial Instruments. Summarized interest expense for the three and six months ended June 30, 2023 and 2022 is as follows: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (dollars in thousands) Corporate Facility $ 7,898 $ 2,640 $ 14,508 $ 4,698 SPV Facility 3,511 — 6,941 — July 2026 Notes 3,882 3,882 7,763 7,763 May 2024 Notes 5,714 5,713 11,427 11,428 SBIC Debentures 2,718 2,827 5,470 5,627 December 2025 Notes 3,031 — 5,643 — December 2022 Notes — 2,233 — 4,466 Total Interest Expense $ 26,754 $ 17,295 $ 51,752 $ 33,982 Corporate Facility Main Street maintains the Corporate Facility to provide additional liquidity to support its investment and operational activities. As of June 30, 2023, the Corporate Facility included total commitments of $980.0 million from a diversified group of 18 lenders and contained an accordion feature with the right to request an increase in commitments under the facility from new and existing lenders on the same terms and conditions as the existing commitments up to a total of $1.4 billion. The revolving period under the Corporate Facility expires in August 2026 and the Corporate Facility is scheduled to mature in August 2027. As of June 30, 2023, borrowings under the Corporate Facility bore interest, subject to Main Street’s election and resetting on a monthly basis on the first of each month, on a per annum basis at a rate equal to the applicable SOFR rate plus an applicable credit spread adjustment of 0.10% plus (i) 1.875% (or the applicable Prime rate plus 0.875%) as long as Main Street meets certain agreed upon excess collateral and maximum leverage requirements or (ii) 2.0% (or the applicable Prime Rate plus 1.0%) otherwise. Main Street pays unused commitment fees of 0.25% per annum on the unused lender commitments under the Corporate Facility. The Corporate Facility is secured by a first lien on the assets of MSCC and its subsidiaries, excluding the equity ownership or assets of the Funds and the External Investment Manager. In connection with the Corporate Facility, MSCC has made customary representations and warranties and is required to comply with various covenants, reporting requirements and other customary requirements for similar credit facilities. As of June 30, 2023, the interest rate on the Corporate Facility was 7.1%. The average interest rate for borrowings under the Corporate Facility was 7.0% and 2.7% for the three months ended June 30, 2023 and 2022, respectively, and 6.7% and 2.3% for the six months ended June 30, 2023 and 2022, respectively. As of June 30, 2023, Main Street was in compliance with all financial covenants of the Corporate Facility. SPV Facility In November 2022 and December 2022, MSCC Funding I, LLC (“MSCC Funding”), a wholly-owned Structured Subsidiary that primarily holds originated loan investments, entered into (i) the SPV Facility with MSCC as collateral manager and (ii) a lender joinder agreement (the “Joinder Agreement”) to the SPV Facility that increased the total number of lenders from three to four lenders and increased the total commitments under the SPV Facility from $240.0 million to $255.0 million, respectively. As of June 30, 2023, the SPV Facility included total commitments of $255.0 million and an accordion feature, subject to the satisfaction of various conditions, that could bring total commitments and borrowing availability to up to $450.0 million. The revolving period under the SPV Facility expires in November 2025 and the SPV Facility is scheduled to mature in November 2027. Advances under the SPV Facility bear interest at a per annum rate equal to the one-month SOFR in effect, plus a 0.10% credit spread adjustment plus an applicable margin of 2.50% during the revolving period and 2.625% and 2.75% during the first and second years thereafter, respectively. MSCC Funding pays a commitment fee of 0.50% per annum on the unused lender commitments up to 35% of the total lender commitments and 0.75% per annum on the unused lender commitments greater than 35% of the total lender commitments. The SPV Facility is secured by a collateral loan on the assets of MSCC Funding and its subsidiaries. In connection with the SPV Facility, MSCC Funding has made customary representations and warranties and is required to comply with various covenants, reporting requirements and other customary requirements for similar credit facilities. As of June 30, 2023, the interest rate on the SPV Facility was 7.8%. The average interest rate for borrowings under the SPV Facility was 7.6% for the three months ended June 30, 2023, and 7.4% for the six months ended June 30, 2023. As of June 30, 2023, MSCC Funding was in compliance with all financial covenants of the SPV Facility. MSCC Funding balance sheets as of June 30, 2023 and December 31, 2022 are as follows: Balance Sheets (dollars in thousands) June 30, 2023 December 31, 2022 (Unaudited) ASSETS Investments at fair value: Non-Control Investments (cost: $318,309 and $314,752 as of June 30, 2023 and December 31, 2022, respectively) $ 320,629 $ 316,507 Cash and cash equivalents 8,200 10,838 Interest and dividend receivable and other assets 2,748 2,828 Accounts receivable to MSCC and its subsidiaries — 556 Receivable for securities sold — 369 Deferred financing costs (net of accumulated amortization of $426 and $141 as of June 30, 2023 and December 31, 2022, respectively) 2,568 2,630 Total assets 334,145 333,728 LIABILITIES SPV Facility $ 170,000 $ 200,000 Accounts payable and other liabilities 7,032 112 Interest payable 1,138 1,272 Total liabilities 178,170 201,384 NET ASSETS Contributed capital 138,163 126,010 Total undistributed earnings 17,812 6,334 Total net assets 155,975 132,344 Total liabilities and net assets $ 334,145 $ 333,728 MSCC Funding statement of operations for the three and six months ended June 30, 2023 are as follows: Statement of Operations (dollars in thousands) (Unaudited) Three Months Ended Six Months Ended June 30, 2023 INVESTMENT INCOME: Interest, fee and dividend income: Non‑Control/Non‑Affiliate investments $ 9,873 $ 18,590 Total investment income 9,873 18,590 EXPENSES: Interest (3,512) (6,940) Management Fee to MSCC (410) (686) General and administrative (19) (51) Total expenses (3,941) (7,677) NET INVESTMENT INCOME 5,932 10,913 NET UNREALIZED APPRECIATION: Non‑Control/Non‑Affiliate investments 1,956 565 Total net unrealized appreciation 1,956 565 NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $ 7,888 $ 11,478 July 2026 Notes In January 2021, Main Street issued $300.0 million in aggregate principal amount of 3.00% unsecured notes due July 14, 2026 (the “July 2026 Notes”) at an issue price of 99.004%. Subsequently, in October 2021, Main Street issued an additional $200.0 million aggregate principal amount of the July 2026 Notes at an issue price of 101.741%. The July 2026 Notes issued in October 2021 have identical terms as, and are a part of a single series with, the July 2026 Notes issued in January 2021. The July 2026 Notes are unsecured obligations and rank pari passu with Main Street’s current and future unsecured indebtedness. The July 2026 Notes may be redeemed in whole or in part at any time at Main Street’s option subject to certain make-whole provisions. The July 2026 Notes bear interest at a rate of 3.00% per year payable semiannually on January 14 and July 14 of each year. As of June 30, 2023, Main Street was in compliance with all covenants and other requirements of the July 2026 Notes. May 2024 Notes In April 2019, Main Street issued $250.0 million in aggregate principal amount of 5.20% unsecured notes due May 1, 2024 (the “May 2024 Notes”) at an issue price of 99.125%. Subsequently, in December 2019, Main Street issued an additional $75.0 million aggregate principal amount of the May 2024 Notes at an issue price of 105.0% and, i n July 2020, Main Street issued an additional $125.0 million aggregate principal amount at an issue price of 102.7%. The May 2024 Notes issued in December 2019 and July 2020 have identical terms as, and are a part of a single series with, the May 2024 Notes issued in April 2019. The May 2024 Notes are unsecured obligations and rank pari passu with Main Street’s current and future unsecured indebtedness. The May 2024 Notes may be redeemed in whole or in part at any time at Main Street’s option subject to certain make-whole provisions. The May 2024 Notes bear interest at a rate of 5.20% per year payable semiannually on May 1 and November 1 of each year. As of June 30, 2023, Main Street was in compliance with all covenants and other requirements of the May 2024 Notes. SBIC Debentures Under existing SBIC regulations, SBA-approved SBICs under common control have the ability to issue debentures guaranteed by the SBA up to a regulatory maximum amount of $350.0 million. Main Street’s SBIC debentures payable, under existing SBA-approved commitments, were $350.0 million as of both June 30, 2023 and December 31, 2022. SBIC debentures provide for interest to be paid semiannually, with principal due at the applicable 10-year maturity date of each debenture. Main Street expects to maintain SBIC debentures under the SBIC program in the future, subject to periodic repayments and borrowings, in an amount up to the regulatory maximum amount for affiliated SBIC funds. The weighted-average annual interest rate on the SBIC debentures was 3.0% and 2.9% as of June 30, 2023 and December 31, 2022, respectively. The first principal maturity due under the existing SBIC debentures is in 2024, and the weighted-average remaining duration as of June 30, 2023 was 5.1 years. In accordance with SBIC regulations, the Funds are precluded from incurring additional non-SBIC debt without the prior approval of the SBA. As of June 30, 2023, the SBIC debentures consisted of (i) $175.0 million par value of SBIC debentures outstanding issued by MSMF, with a recorded value of $171.8 million that was net of unamortized debt issuance costs of $3.2 million and (ii) $175.0 million par value of SBIC debentures issued by MSC III with a recorded value of $172.2 million that was net of unamortized debt issuance costs of $2.8 million. December 2025 Notes In December 2022, Main Street issued $100.0 million in aggregate principal amount of 7.84% Series A unsecured notes due December 23, 2025 (the “December 2025 Series A Notes”) at par. In February 2023, Main Street issued an additional $50.0 million in aggregate principal amount of 7.53% Series B unsecured notes due December 23, 2025 (the “December 2025 Series B Notes” and, together with the December 2025 Series A Notes, the “December 2025 Notes”), at par. The December 2025 Notes are unsecured obligations and rank pari passu with Main Street’s current and future unsecured indebtedness. The December 2025 Notes may be redeemed in whole or in part at any time at Main Street’s option at par plus accrued interest to the prepayment date, subject to certain make-whole provisions. The December 2025 Series A Notes and the December 2025 Series B Notes bear interest at a rate of 7.84% and 7.53% per year, respectively, payable semiannually on June 23 and December 23 of each year. In addition, Main Street is obligated to offer to repay the December 2025 Notes at par plus accrued and unpaid interest if certain change in control events occur. The December 2025 Notes will bear interest at an increased rate from the date that (i) the December 2025 Notes receive a below investment grade rating by a rating agency if there is one or two rating agencies providing ratings of the December 2025 Notes, or two-thirds of the rating agencies if there are three rating agencies who are rating the notes (a “Below Investment Grade Event”), or (ii) the ratio of the Company’s consolidated secured indebtedness (other than indebtedness of the Funds or any Structured Subsidiaries) to the value of its consolidated total assets is greater than 0.35 to 1.00 (a “Secured Debt Ratio Event”), to and until the date on which the Below Investment Grade Event and the Secured Debt Ratio Event are no longer continuing. The governing agreement for the December 2025 Notes contains customary terms and conditions for senior unsecured notes issued in a private placement, as well as customary events of default with customary cure and notice periods. As of June 30, 2023, Main Street was in compliance with all covenants and other requirements of the December 2025 Notes. December 2022 Notes In November 2017, Main Street issued $185.0 million in aggregate principal amount of 4.50% unsecured notes due December 1, 2022 (the “December 2022 Notes”) at an issue price of 99.16%. The December 2022 Notes bore interest at a rate of 4.50% per year payable semiannually on June 1 and December 1 of each year. In December 2022, Main Street repaid the entire principal amount of the issued and outstanding December 2022 Notes at par value plus the accrued and unpaid interest.

FINANCIAL HIGHLIGHTS

FINANCIAL HIGHLIGHTS	6 Months Ended
FINANCIAL HIGHLIGHTS	Jun. 30, 2023
Investment Company [Abstract]
FINANCIAL HIGHLIGHTS	FINANCIAL HIGHLIGHTS The following is a schedule of financial highlights of Main Street for the six months ended June 30, 2023 and 2022: Six Months Ended June 30, Per Share Data: 2023 2022 NAV at the beginning of the period $ 26.86 $ 25.29 Net investment income (1) 2.08 1.47 Net realized loss (1)(2) (1.30) (0.02) Net unrealized appreciation (depreciation) (1)(2) 1.75 (0.14) Income tax benefit (provision) (1)(2) (0.21) (0.21) Net increase in net assets resulting from operations (1) 2.32 1.10 Dividends paid from net investment income (1.75) (1.44) Dividends paid (1.75) (1.44) Impact of the net change in monthly dividends declared prior to the end of the period and paid in the subsequent period (0.01) — Accretive effect of stock offerings (issuing shares above NAV per share) 0.31 0.48 Accretive effect of DRIP issuance (issuing shares above NAV per share) 0.05 0.05 Other (3) (0.09) (0.11) NAV at the end of the period $ 27.69 $ 25.37 Market value at the end of the period $ 40.03 $ 38.53 Shares outstanding at the end of the period 81,431,006 73,517,558 ____________________ (1) Based on weighted-average number of common shares outstanding for the period. (2) Net realized gains or losses, net unrealized appreciation or depreciation, and income tax provision or benefit can fluctuate significantly from period to period. (3) Includes the impact of the different share amounts as a result of calculating certain per share data based on the weighted-average basic shares outstanding during the period and certain per share data based on the shares outstanding as of a period end or transaction date. Six Months Ended June 30, 2023 2022 (dollars in thousands) NAV at end of period $ 2,254,948 $ 1,865,163 Average NAV $ 2,178,819 $ 1,842,554 Average outstanding debt $ 1,991,714 $ 1,793,857 Ratio of total expenses, including income tax expense, to average NAV (1)(2) 2.32 % 3.97 % Ratio of operating expenses to average NAV (2)(3) 1.92 % 3.13 % Ratio of operating expenses, excluding interest expense, to average NAV (2)(3) 0.69 % 1.28 % Ratio of net investment income to average NAV (2) 3.93 % 5.80 % Portfolio turnover ratio (2) 7.76 % 10.48 % Total investment return (2)(4) 13.26 % (10.96) % Total return based on change in NAV (2)(5) 5.05 % 4.47 % ____________________ (1) Total expenses are the sum of operating expenses and net income tax provision. Net income tax provision includes the accrual of net deferred tax provision relating to the net unrealized appreciation or depreciation on portfolio investments held in Taxable Subsidiaries and due to the change in the loss carryforwards, which are non-cash in nature and may vary significantly from period to period. Main Street is required to include net deferred tax provision in calculating its total expenses even though these net deferred taxes are not currently payable or receivable. (2) Not annualized. (3) Unless otherwise noted, operating expenses include interest, compensation, general and administrative and share-based compensation expenses, net of expenses allocated to the External Investment Manager of $10.7 million and $6.3 million for the six months ended June 30, 2023 and 2022, respectively. (4) Total investment return is based on the purchase of stock at the current market price on the first day and a sale at the current market price on the last day of each period reported on the table and assumes reinvestment of dividends at prices obtained by Main Street’s dividend reinvestment plan during the period. The return does not reflect any sales load that may be paid by an investor. (5) Total return based on change in NAV was calculated using the sum of ending NAV plus dividends to stockholders and other non-operating changes during the period, divided by the beginning NAV. Non-operating changes include any items that affect NAV other than the net increase in net assets resulting from operations, such as the effects of stock offerings, shares issued under the DRIP and equity incentive plans and other miscellaneous items.

DIVIDENDS, DISTRIBUTIONS AND TA

DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME	6 Months Ended
DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME	Jun. 30, 2023
Income Tax Disclosure [Abstract]
DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME	DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME Main Street currently pays regular monthly dividends to its stockholders and periodically pays supplemental dividends to its stockholders. Future dividends, if any, will be determined by its Board of Directors on a quarterly basis. Main Street paid regular monthly dividends of $0.225 per share, totaling $54.3 million, or $0.675 per share, for the three months ended June 30, 2023, and $107.9 million, or $1.35 per share, for the six months ended June 30, 2023, compared to aggregate regular monthly dividends of $47.1 million, or $0.645 per share, for the three months ended June 30, 2022, and $93.1 million, or $1.29 per share, for the six months ended June 30, 2022. Main Street also paid a supplemental dividend of $18.2 million, or $0.225 per share, during the three months ended June 30, 2023, and $32.2 million, or $0.40 per share, during the six months ended June 30, 2023, compared to supplemental dividends paid of $5.5 million, or $0.075 per share, during the three months ended June 30, 2022, and $10.9 million, or $0.15 per share, during the six months ended June 30, 2022. MSCC has elected to be treated for U.S. federal income tax purposes as a RIC. MSCC’s taxable income includes the taxable income generated by MSCC and certain of its subsidiaries, including the Funds and Structured Subsidiaries, which are treated as disregarded entities for tax purposes. As a RIC, MSCC generally will not pay corporate-level U.S. federal income taxes on any net ordinary taxable income or capital gains that MSCC distributes to its stockholders. MSCC must generally distribute at least 90% of its “investment company taxable income” (which is generally its net ordinary taxable income and realized net short-term capital gains in excess of realized net long-term capital losses) and 90% of its tax-exempt income to maintain its RIC status (pass-through tax treatment for amounts distributed). As part of maintaining RIC status, undistributed taxable income (subject to a 4% non-deductible U.S. federal excise tax) pertaining to a given fiscal year may be distributed up to twelve months subsequent to the end of that fiscal year, provided such dividends are declared on or prior to the later of (i) filing of the U.S. federal income tax return for the applicable fiscal year or (ii) the fifteenth day of the ninth month following the close of the year in which such taxable income was generated. The determination of the tax attributes for Main Street’s distributions is made annually, based upon its taxable income for the full year and distributions paid for the full year. Therefore, a determination made on an interim basis may not be representative of the actual tax attributes of distributions for a full year. Ordinary dividend distributions from a RIC do not qualify for the 20% maximum tax rate (plus a 3.8% Medicare surtax, if applicable) on dividend income from domestic corporations and qualified foreign corporations, except to the extent that the RIC received the income in the form of qualifying dividends from domestic corporations and qualified foreign corporations. The tax attributes for distributions will generally include both ordinary income and qualified dividends, but may also include either one or both of capital gains and return of capital. Listed below is a reconciliation of “Net increase in net assets resulting from operations” to taxable income and to total distributions declared to common stockholders for the six months ended June 30, 2023 and 2022. Six Months Ended June 30, 2023 2022 (estimated, dollars in thousands) Net increase in net assets resulting from operations $ 186,107 $ 79,953 Book-tax difference from share-based compensation expense (7,646) (6,906) Net unrealized (appreciation) depreciation (140,059) 9,841 Income tax provision 16,760 15,417 Pre-tax book (income) loss not consolidated for tax purposes 44,328 (9,249) Book income and tax income differences, including debt origination, structuring fees, dividends, realized gains and changes in estimates 45,352 13,568 Estimated taxable income (1) 144,842 102,624 Taxable income earned in prior year and carried forward for distribution in current year 49,216 50,834 Taxable income earned prior to period end and carried forward for distribution next period (71,501) (64,509) Dividend payable as of period end and paid in the following period 18,729 15,673 Total distributions accrued or paid to common stockholders $ 141,286 $ 104,622 ____________________ (1) MSCC’s taxable income for each period is an estimate and will not be finally determined until the company files its tax return for each year. Therefore, the final taxable income, and the taxable income earned in each period and carried forward for distribution in the following period, may be different than this estimate. The Taxable Subsidiaries primarily hold certain equity investments for Main Street. The Taxable Subsidiaries permit Main Street to hold equity investments in portfolio companies which are “pass-through” entities for tax purposes and to continue to comply with the “source-of-income” requirements contained in the RIC tax provisions of the Code. The Taxable Subsidiaries are consolidated with MSCC for U.S. GAAP financial reporting purposes, and the portfolio investments held by the Taxable Subsidiaries are included in Main Street’s consolidated financial statements as portfolio investments and recorded at fair value. The Taxable Subsidiaries are not consolidated with MSCC for income tax purposes and may generate income tax expense, or benefit, and tax assets and liabilities, as a result of their ownership of certain portfolio investments. The taxable income, or loss, of the Taxable Subsidiaries may differ from their book income, or loss, due to temporary book and tax timing differences and permanent differences. The Taxable Subsidiaries are each taxed at corporate income tax rates based on their taxable income. The income tax expense, or benefit, if any, and the related tax assets and liabilities, of the Taxable Subsidiaries are reflected in Main Street’s consolidated financial statements. The income tax expense (benefit) for Main Street is generally composed of (i) deferred tax expense (benefit), which is primarily the result of the net activity relating to the portfolio investments held in the Taxable Subsidiaries, including changes in loss carryforwards, changes in net unrealized appreciation or depreciation and other temporary book tax differences, and (ii) current tax expense, which is primarily the result of current U.S. federal income and state taxes and excise taxes on Main Street’s estimated undistributed taxable income. The income tax expense, or benefit, and the related tax assets and liabilities generated by the Taxable Subsidiaries, if any, are reflected in Main Street’s Consolidated Statements of Operations. Main Street’s provision for income taxes was comprised of the following for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (dollars in thousands) Current tax expense: Federal $ 158 $ 64 $ 298 $ 115 State 433 71 1,289 614 Excise 1,080 674 1,820 1,389 Total current tax expense 1,671 809 3,407 2,118 Deferred tax expense: Federal 6,444 7,166 12,250 9,973 State 532 2,345 1,103 3,326 Total deferred tax expense 6,976 9,511 13,353 13,299 Total income tax provision $ 8,647 $ 10,320 $ 16,760 $ 15,417 The net deferred tax liability at June 30, 2023 and December 31, 2022 was $61.2 million and $47.8 million, respectively, with the change primarily related to changes in net unrealized appreciation or depreciation, changes in loss carryforwards, and other temporary book-tax differences relating to portfolio investments held by the Taxable Subsidiaries. At June 30, 2023, for U.S. federal income tax purposes, the Taxable Subsidiaries had a net operating loss carryforward from prior years which, if unused, will expire in various taxable years from 2034 through 2037. Any net operating losses generated in 2018 and future periods are not subject to expiration and will carryforward indefinitely until utilized. Additionally, the Taxable Subsidiaries have interest expense limitation carryforwards which have an indefinite carryforward period.

COMMON STOCK

COMMON STOCK	6 Months Ended
COMMON STOCK	Jun. 30, 2023
Equity [Abstract]
COMMON STOCK	COMMON STOCKMain Street maintains a program with certain selling agents through which it can sell shares of its common stock by means of at-the-market offerings from time to time (the “ATM Program”). During the six months ended June 30, 2023, Main Street sold 2,148,490 shares of its common stock at a weighted-average price of $39.52 per share and raised $84.9 million of gross proceeds under the ATM Program. Net proceeds were $84.1 million after commissions to the selling agents on shares sold and offering costs. As of June 30, 2023, sales transactions representing 404,330 shares had not settled and are not included in shares issued and outstanding on the face of the Consolidated Balance Sheets but are included in the weighted average shares outstanding in the Consolidated Statements of Operations and in the shares used to calculate the NAV per share. In March 2022, Main Street entered into new distribution agreements to sell up to 15,000,000 shares through the ATM Program. As of June 30, 2023, 8,314,194 shares remained available for sale under the ATM Program. During the year ended December 31, 2022, Main Street sold 5,407,382 shares of its common stock at a weighted-average price of $39.29 per share and raised $212.4 million of gross proceeds under the ATM Program. Net proceeds were $209.9 million after commissions to the selling agents on shares sold and offering costs. During the year ended December 31, 2022, Main Street completed a public equity offering (the “Equity Offering”) of 1,345,500 shares of common stock at a public offering price of $42.85 per share, including the underwriters’ full exercise of their option to purchase 175,500 additional shares, resulting in total net proceeds, including exercise of the underwriters’ option to purchase additional shares and after deducting underwriting discounts and estimated offering expenses payable by Main Street, of approximately $55.1 million.

DIVIDEND REINVESTMENT PLAN

DIVIDEND REINVESTMENT PLAN	6 Months Ended
DIVIDEND REINVESTMENT PLAN	Jun. 30, 2023
Equity [Abstract]
DIVIDEND REINVESTMENT PLAN	DIVIDEND REINVESTMENT PLAN The dividend reinvestment feature of Main Street’s dividend reinvestment and direct stock purchase plan (the “DRIP”) provides for the reinvestment of dividends on behalf of its stockholders, unless a stockholder has elected to receive dividends in cash. As a result, if Main Street declares a cash dividend, its stockholders who have not “opted out” of the DRIP by the dividend record date will have their cash dividend automatically reinvested into additional shares of MSCC common stock. The share requirements of the DRIP may be satisfied through the issuance of shares of common stock or through open market purchases of common stock by the DRIP plan administrator. Newly issued shares will be valued based upon the final closing price of MSCC’s common stock on the valuation date determined for each dividend by Main Street’s Board of Directors. Shares purchased in the open market to satisfy the DRIP requirements will be valued based upon the average price of the applicable shares purchased, before any associated brokerage or other costs. Main Street’s DRIP is administered by its transfer agent on behalf of Main Street’s record holders and participating brokerage firms. Brokerage firms and other financial intermediaries may decide not to participate in Main Street’s DRIP but may provide a similar dividend reinvestment plan for their clients. Summarized DRIP information for the six months ended June 30, 2023 and 2022 is as follows: Six Months Ended June 30, 2023 2022 (dollars in thousands) DRIP participation $ 14,688 $ 9,813 Shares issued for DRIP 374,173 246,199

SHARE-BASED COMPENSATION

SHARE-BASED COMPENSATION	6 Months Ended
SHARE-BASED COMPENSATION	Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]
SHARE-BASED COMPENSATION	SHARE-BASED COMPENSATION Main Street accounts for its share-based compensation plans using the fair value method, as prescribed by ASC 718, Compensation—Stock Compensation . Accordingly, for restricted stock awards (“RSAs”), Main Street measured the grant date fair value based upon the market price of its common stock on the date of the grant and amortizes the fair value of the awards as share-based compensation expense over the requisite service period, which is generally the vesting term. Main Street’s Board of Directors approves the issuance of shares of restricted stock to Main Street employees pursuant to the Main Street Capital Corporation 2022 Equity and Incentive Plan (the “Equity and Incentive Plan”). These shares generally vest over a three-year period from the grant date. The fair value is expensed over the service period, starting on the grant date. The following table summarizes the restricted stock issuances approved by Main Street’s Board of Directors under the Equity and Incentive Plan, net of shares forfeited, if any, and the remaining shares of restricted stock available for issuance as of June 30, 2023. Restricted stock authorized under the plan 5,000,000 Less net restricted stock granted (552,077) Restricted stock available for issuance as of June 30, 2023 4,447,923 As of June 30, 2023, the following table summarizes the restricted stock issued to Main Street’s non-employee directors and the remaining shares of restricted stock available for issuance pursuant to the Main Street Capital Corporation 2022 Non-Employee Director Restricted Stock Plan. These shares are granted upon appointment or election to the board and vest on the day immediately preceding the annual meeting of stockholders following the respective grant date and are expensed over such service period. Restricted stock authorized under the plan 300,000 Less net restricted stock granted (7,525) Restricted stock available for issuance as of June 30, 2023 292,475 For the three months ended June 30, 2023 and 2022, Main Street recognized total share-based compensation expense of $4.1 million and $3.6 million, respectively, related to the restricted stock issued to Main Street employees and non-employee directors. For the six months ended June 30, 2023 and 2022, Main Street recognized total share-based compensation expense of $8.2 million and $6.4 million, respectively, related to the restricted stock issued to Main Street employees and non-employee directors. Summarized RSA activity for the six months ended June 30, 2023 is as follows: Six Months Ended June 30, 2023 Number Weighted-Average Grant-Date Fair Value Restricted Stock Awards (RSAs): of Shares ( $ per share) Non-vested, December 31, 2022 817,401 $ 38.78 Granted (1) 544,533 39.42 Vested (1)(2) (398,914) 39.20 Forfeited (11,486) 40.50 Non-vested, June 30, 2023 951,534 $ 40.48 Aggregate intrinsic value as of June 30, 2023 (in thousands) $ 38,090 (3) ___________________________ (1) Restricted units generally vest over a three-year period from the grant date (as noted above). (2) Vested shares included 151,058 shares withheld for payroll taxes paid on behalf of employees. (3) Aggregate intrinsic value is the product of total non-vested restricted shares as of June 30, 2023 and $40.03 per share, the closing price of our common stock on June 30, 2023. The total fair value of RSAs that vested during the six months ended June 30, 2023 and 2022 was $15.6 million and $10.3 million, respectively. As of June 30, 2023, there was $34.4 million of total unrecognized compensation expense related to Main Street’s non-vested restricted shares. This compensation expense is expected to be recognized over a remaining weighted-average period of 2.7 years as of June 30, 2023.

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	6 Months Ended
COMMITMENTS AND CONTINGENCIES	Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES At June 30, 2023, Main Street had the following outstanding commitments (in thousands): Investments with equity capital commitments that have not yet funded: Amount Brightwood Capital Fund Investments Brightwood Capital Fund V, LP $ 3,000 Brightwood Capital Fund III, LP 300 3,300 Freeport Fund Investments Freeport First Lien Loan Fund III LP 6,733 Freeport Financial SBIC Fund LP 3,841 10,574 Harris Preston Fund Investments HPEP 4, L.P. 7,204 HPEP 3, L.P. 1,555 HPEP 423 COR, LP 600 2717 MH, L.P. 52 9,411 MS Private Loan Fund I, LP 750 UnionRock Energy Fund Investments UnionRock Energy Fund III, LP 9,850 UnionRock Energy Fund II, LP 1,907 11,757 Total Equity Commitments (1)(2) $ 35,792 Investments with commitments to fund revolving loans that have not been fully drawn or term loans with additional commitments not yet funded: Dalton US Inc. $ 16,463 HEADLANDS OP-CO LLC 10,125 MS Private Loan Fund I, LP 10,000 Xenon Arc, Inc. 9,408 Power System Solutions 9,255 JTI Electrical & Mechanical, LLC 8,421 AB Centers Acquisition Corporation 8,103 AMEREQUIP LLC. 7,704 SI East, LLC 7,500 PTL US Bidco, Inc 7,156 Archer Systems, LLC 7,115 Veregy Consolidated, Inc. 5,875 Robbins Bros. Jewelry, Inc. 4,500 South Coast Terminals Holdings, LLC 4,465 NWN Corporation 4,379 Direct Marketing Solutions, Inc. 4,250 Cody Pools, Inc. 4,214 Bettercloud, Inc. 4,189 Paragon Healthcare, Inc. 4,110 IG Investor, LLC 4,000 NexRev LLC 4,000 Watterson Brands, LLC 3,917 Microbe Formulas, LLC 3,601 Classic H&G Holdco, LLC 3,440 VVS Holdco, LLC 3,200 Imaging Business Machines, L.L.C. 2,965 MetalForming AcquireCo, LLC 2,795 Batjer TopCo, LLC 2,700 IG Parent Corporation 2,500 Nebraska Vet AcquireCo, LLC 2,500 Superior Rigging & Erecting Co. 2,500 CaseWorthy, Inc. 2,459 West Star Aviation Acquisition, LLC 2,411 Centre Technologies Holdings, LLC 2,400 Channel Partners Intermediateco, LLC 2,275 GS HVAM Intermediate, LLC 2,273 SPAU Holdings, LLC 2,235 Winter Services LLC 2,222 AVEX Aviation Holdings, LLC 2,210 ITA Holdings Group, LLC 2,174 ArborWorks, LLC 2,128 GRT Rubber Technologies LLC 2,050 Bluestem Brands, Inc. 2,019 Cybermedia Technologies, LLC 2,000 Engineering Research & Consulting, LLC 1,965 GULF PACIFIC ACQUISITION, LLC 1,919 Acumera, Inc. 1,885 Elgin AcquireCo, LLC 1,877 Johnson Downie Opco, LLC 1,800 NinjaTrader, LLC 1,750 RTIC Subsidiary Holdings, LLC 1,644 MonitorUS Holding, LLC 1,623 Trantech Radiator Topco, LLC 1,600 Chamberlin Holding LLC 1,600 Roof Opco, LLC 1,556 Burning Glass Intermediate Holding Company, Inc. 1,549 Pearl Meyer Topco LLC 1,500 Bond Brand Loyalty ULC 1,427 Career Team Holdings, LLC 1,350 American Health Staffing Group, Inc. 1,333 Escalent, Inc. 1,326 Evergreen North America Acquisitions, LLC 1,313 Mako Steel, LP 1,278 RA Outdoors LLC 1,278 Project Eagle Holdings, LLC 1,250 Gamber-Johnson Holdings, LLC 1,200 Eastern Wholesale Fence LLC 1,115 ATS Operating, LLC 1,080 Infolinks Media Buyco, LLC 1,008 Orttech Holdings, LLC 800 Mystic Logistics Holdings, LLC 800 Adams Publishing Group, LLC 788 Project BarFly, LLC 760 Inspire Aesthetics Management, LLC 555 Jensen Jewelers of Idaho, LLC 500 Invincible Boat Company, LLC. 457 Clad-Rex Steel, LLC 400 Wall Street Prep, Inc. 400 Gulf Publishing Holdings, LLC 400 Hawk Ridge Systems, LLC 334 ASC Interests, LLC 300 Jackmont Hospitality, Inc. 237 AAC Holdings, Inc. 200 SIB Holdings, LLC 160 Acousti Engineering Company of Florida 53 Interface Security Systems, L.L.C 1 Total Loan Commitments 248,577 Total Commitments $ 284,369 ____________________ (1) This table excludes commitments related to six additional Other Portfolio investments for which the investment period has expired and remaining commitments may only be drawn to pay fund expenses. The Company does not expect any material future capital to be called on its commitment to these investments and as a result has excluded those commitments from this table. (2) This table excludes commitments related to three additional Other Portfolio investments for which the investment period has expired and remaining commitments may only be drawn to pay fund expenses or for follow on investments in existing portfolio companies. The Company does not expect any material future capital to be called on its commitment to these investments to pay fund expenses, and based on representations from the fund manager, the Company does not expect any further capital will be called on its commitment for follow on investments. As a result, the Company has excluded those commitments from this table. Main Street will fund its unfunded commitments from the same sources it uses to fund its investment commitments that are funded at the time they are made (which are typically through existing cash and cash equivalents and borrowings under the Credit Facilities). Main Street follows a process to manage its liquidity and ensure that it has available capital to fund its unfunded commitments as necessary. The Company had no unrealized appreciation or depreciation on the outstanding unfunded commitments as of June 30, 2023. Main Street may, from time to time, be involved in litigation arising out of its operations in the normal course of business or otherwise. Furthermore, third parties may try to impose liability on Main Street in connection with the activities of its portfolio companies. While the outcome of any current legal proceedings cannot at this time be predicted with certainty, Main Street does not expect any current matters will materially affect its financial condition or results of operations; however, there can be no assurance whether any pending legal proceedings will have a material adverse effect on Main Street’s financial condition or results of operations in any future reporting period.

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	6 Months Ended
RELATED PARTY TRANSACTIONS	Jun. 30, 2023
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS As discussed further in Note D — External Investment Manager , the External Investment Manager is treated as a wholly-owned portfolio company of Main Street and is included as part of Main Street’s Investment Portfolio. At June 30, 2023, Main Street had a receivable of $10.5 million due from the External Investment Manager, which included (i) $7.6 million related primarily to operating expenses incurred by Main Street as required to support the External Investment Manager’s business and amounts due from the External Investment Manager to Main Street under a tax sharing agreement (see further discussion in Note D — External Investment Manager ) and (ii) $2.9 million of dividends declared but not paid by the External Investment Manager. MSCC has entered into an agreement with the External Investment Manager to share employees in connection with its asset management business generally, and specifically for the External Investment Manager’s relationship with MSC Income and its other clients (see further discussion in Note A.1 — Organization and Basis of Presentation — Organization and Note D — External Investment Manager ). From time to time, Main Street may make investments in clients of the External Investment Manager in the form of debt or equity capital on terms approved by Main Street’s Board of Directors. In May 2022, Main Street purchased 94,697 shares of common stock of MSC Income from MSC Income at the price shares were purchased by MSC Income stockholders pursuant to MSC Income’s dividend reinvestment plan for its May 2022 dividend on such date. In May 2023, Main Street purchased an additional 255,755 shares of common stock of MSC Income from MSC Income at the price shares were purchased by MSC Income stockholders pursuant to MSC Income’s dividend reinvestment plan for its May 2023 dividend on such date. Each of Main Street’s purchases of MSC Income common stock was unanimously approved by the Board of Directors and MSC Income’s board of directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act, of each board. As of June 30, 2023, Main Street owned 350,452 shares of MSC Income. In addition, certain of Main Street’s officers and employees own shares of MSC Income and therefore have direct pecuniary interests in MSC Income. In December 2020, the External Investment Manager entered into an Investment Management Agreement with the Private Loan Fund to provide investment advisory and management services in exchange for an asset-based fee and certain incentive fees. The Private Loan Fund is a private investment fund exempt from registration under the 1940 Act that co-invests with Main Street in Main Street’s Private Loan investment strategy. In connection with the Private Loan Fund’s initial closing in December 2020, Main Street committed to contribute up to $10.0 million as a limited partner and is entitled to distributions on such interest. In February 2022, Main Street increased its total commitment to the Private Loan Fund from $10.0 million to $15.0 million. In addition, certain of Main Street’s officers and employees (and certain of their immediate family members) have made capital commitments to the Private Loan Fund as limited partners and therefore have direct pecuniary interests in the Private Loan Fund. As of June 30, 2023, Main Street has funded $14.3 million of its limited partner commitment and Main Street’s unfunded commitment was $0.7 million. Main Street’s limited partner commitment to the Private Loan Fund was unanimously approved by the Board of Directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act. Additionally, Main Street provided the Private Loan Fund with a revolving line of credit pursuant to an Unsecured Revolving Promissory Note, dated February 5, 2021 and was subsequently amended on November 30, 2021 and on December 29, 2021 (as amended, the “PL Fund 2021 Note”), in an aggregate amount equal to the amount of limited partner capital commitments to the Private Loan Fund up to $85.0 million. Borrowings under the PL Fund 2021 Note bore interest at a fixed rate of 5.00% per annum and matured on February 28, 2022. The PL Fund 2021 Note was unanimously approved by Main Street’s Board of Directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act. In February 2022, the Private Loan Fund fully repaid all borrowings outstanding under the PL Fund 2021 Note and the PL Fund 2021 Note was extinguished. In March 2022, Main Street provided the Private Loan Fund with a revolving line of credit pursuant to a Secured Revolving Promissory Note, dated March 17, 2022 (the “PL Fund 2022 Note”), which provides for borrowings up to $10.0 million. Borrowings under the PL Fund 2022 Note bear interest at a fixed rate of 5.00% per annum and mature on the date upon which the Private Loan Fund’s investment period concludes, which is scheduled to occur in March 2026. Available borrowings under the PL Fund 2022 Note are subject to a 0.25% non-use fee. The PL Fund 2022 Note was unanimously approved by Main Street’s Board of Directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act. As of June 30, 2023, there were no borrowings outstanding under the PL Fund 2022 Note. In November 2015, Main Street’s Board of Directors approved and adopted the Main Street Capital Corporation Deferred Compensation Plan (the “2015 Deferred Compensation Plan”). The 2015 Deferred Compensation Plan became effective on January 1, 2016 and replaced the Deferred Compensation Plan for Non-Employee Directors previously adopted by the Board of Directors in June 2013 (the “2013 Deferred Compensation Plan”). Under the 2015 Deferred Compensation Plan, non-employee directors and certain key employees may defer receipt of some or all of their cash compensation and directors’ fees, subject to certain limitations. Individuals participating in the 2015 Deferred Compensation Plan receive distributions of their respective balances based on predetermined payout schedules or other events as defined by the plan and are also able to direct investments made on their behalf among investment alternatives permitted from time to time under the plan, including phantom Main Street stock units. As of June 30, 2023, $18.4 million of compensation, plus net unrealized gains and losses and investment income, and minus previous distributions, was deferred under the 2015 Deferred Compensation Plan (including amounts previously deferred under the 2013 Deferred Compensation Plan). Of this amount, $6.8 million is deferred into phantom Main Street stock units, representing 170,008 shares of Main Street’s common stock. Any amounts deferred under the plan represented by phantom Main Street stock units will not be issued or included as outstanding on the Consolidated Statements of Changes in Net Assets until such shares are actually distributed to the participant in accordance with the plan, but the related phantom stock units are included in weighted-average shares outstanding with the related dollar amount of the deferral included in total expenses in Main Street’s Consolidated Statements of Operations as the deferred fees represented by such phantom stock units are earned over the service period. The dividend amounts related to additional phantom stock units are included in the Consolidated Statements of Changes in Net Assets as an increase to dividends to stockholders offset by a corresponding increase to additional paid-in capital .

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	6 Months Ended
SUBSEQUENT EVENTS	Jun. 30, 2023
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS In July 2023, Main Street expanded its total commitments under the Corporate Facility from $980.0 million to $995.0 million. The commitment increase was executed under the accordion feature of the Corporate Facility which allows for an increase up $1.4 billion in total commitments under the facility from new and existing lenders on the same terms and conditions as the existing commitments. In August 2023, Main Street declared a supplemental cash dividend of $0.275 per share payable in September 2023. This supplemental cash dividend is in addition to the previously announced regular monthly cash dividends that Main Street declared for the third quarter of 2023 of $0.23 per share for each of July, August and September 2023. In August 2023, Main Street also declared regular monthly dividends of $0.235 per share for each month of October, November and December of 2023. These regular monthly dividends equal a total of $0.705 per share for the fourth quarter of 2023, representing a 6.8% increase from the regular monthly dividends paid in the fourth quarter of 2022. Including the regular monthly and supplemental dividends declared for the third and fourth quarters of 2023, Main Street will have paid $38.54 per share in cumulative dividends since its October 2007 initial public offering.

Consolidated Schedule of Inve_3

Consolidated Schedule of Investments In and Advances to Affiliates	6 Months Ended
	Jun. 30, 2023
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Consolidated Schedule of Investments In and Advances to Affiliates	Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, Majority-owned investments Analytical Systems Keco Holdings, LLC L+ 10.00% Secured Debt (8) $ — $ — $ 3 $ (3) $ 1 $ — $ (2) 15.25% L+ 10.00% Secured Debt (8) — — 379 4,545 39 140 4,444 14.13% Preferred Member Units (8) — — — — — — — Preferred Member Units (8) — 566 — 3,504 566 — 4,070 Warrants (8) — — — — — — — Brewer Crane Holdings, LLC 15.17% L+ 10.00% Secured Debt (9) — (63) 429 5,964 — 311 5,653 Preferred Member Units (9) — (720) 60 7,080 — 720 6,360 Café Brazil, LLC Member Units (8) — (80) 103 2,210 — 80 2,130 California Splendor Holdings LLC 15.25% L+ 10.00% Secured Debt (9) — (7) 2,127 28,000 7 7 28,000 Preferred Member Units (9) — (2,060) 125 25,495 — 2,060 23,435 15.00% 15.00% Preferred Member Units (9) — — 301 3,994 301 — 4,295 Clad-Rex Steel, LLC Secured Debt (12) (5) — — 1 — — — — 11.50% Secured Debt (5) — (64) 621 10,440 18 824 9,634 10.00% Secured Debt (5) — — 52 1,039 — 17 1,022 Member Units (5) — (1,840) 275 8,220 — 1,840 6,380 Member Units (5) — 220 — 610 519 — 1,129 CMS Minerals Investments Member Units (9) 99 (366) 44 1,670 99 1,769 — Cody Pools, Inc. Secured Debt (12) (8) — 12 2 — — — — 12.50% Secured Debt (8) — 39 582 — 46,312 — 46,312 L+ 10.50% Secured Debt (8) — (19) 96 1,462 32 1,494 — L+ 10.50% Secured Debt (8) — (280) 2,683 40,801 — 40,801 — Preferred Member Units (8) — 6,940 1,446 58,180 6,940 — 65,120 CompareNetworks Topco, LLC L+ 9.00% Secured Debt (9) — — — — — — — 14.25% L+ 9.00% Secured Debt (9) — (5) 355 5,241 5 377 4,869 Preferred Member Units (9) — (3,450) 158 19,830 — 3,450 16,380 Cybermedia Technologies, LLC Secured Debt (12) (6) — — 2 — — — — 13.00% Secured Debt (6) — — 1,042 — 28,720 — 28,720 Preferred Member Units (6) — — — — 15,000 — 15,000 Datacom, LLC 7.50% Secured Debt (8) — — 18 223 583 90 716 10.00% Secured Debt (8) — — 507 7,789 78 135 7,732 Preferred Member Units (8) — (320) — 2,670 — 320 2,350 Direct Marketing Solutions, Inc. Secured Debt (12) (9) — (14) 23 — 14 14 — 13.00% Secured Debt (9) — (35) 1,876 27,267 35 837 26,465 Preferred Stock (9) — 1,130 343 22,220 1,130 — 23,350 Elgin AcquireCo, LLC SF+ 6.00% Secured Debt (12) (5) — — 4 (9) 1 — (8) 12.00% Secured Debt (5) — — 1,151 18,594 19 — 18,613 9.00% Secured Debt (5) — — 287 6,294 1 21 6,274 Common Stock (5) — 364 — 7,603 364 1,877 6,090 Common Stock (5) — 112 — 1,558 112 — 1,670 Gamber-Johnson Holdings, LLC SF+ 8.50% Secured Debt (12) (5) — — 3 — — — — 11.00% SF+ 8.00% Secured Debt (5) — (64) 3,598 64,078 64 4,464 59,678 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, Member Units (5) — 19,270 2,904 50,890 19,270 — 70,160 GRT Rubber Technologies LLC 11.17% L+ 6.00% Secured Debt (12) (8) — — 66 670 630 — 1,300 13.17% L+ 8.00% Secured Debt (8) — (23) 2,624 40,493 23 23 40,493 Member Units (8) — — 84 44,440 — — 44,440 Gulf Publishing Holdings, LLC L+ 9.50% Secured Debt (12) (8) — — — — — — — 12.50% Secured Debt (8) — — 151 2,284 — — 2,284 Preferred Equity (8) — — — 3,780 — — 3,780 Member Units (8) — — — — — — — IG Investor, LLC Secured Debt (12) (6) — — 84 — 761 800 (39) 13.00% Secured Debt (6) — — 896 — 37,333 — 37,333 Common Equity (6) — — — — 15,096 — 15,096 Independent Pet Partners Intermediate Holdings, LLC Common Equity (6) — — — — 18,300 — 18,300 Jensen Jewelers of Idaho, LLC P+ 6.75% Secured Debt (12) (9) — — — — — — — 15.00% P+ 6.75% Secured Debt (9) — (3) 183 2,450 3 3 2,450 Member Units (9) — (1,460) 626 14,970 — 1,460 13,510 Kickhaefer Manufacturing Company, LLC 12.00% Secured Debt (5) — — 1,407 20,374 195 — 20,569 9.00% Secured Debt (5) — — 175 3,842 1 19 3,824 Preferred Equity (5) — 510 — 7,220 510 — 7,730 Member Units (5) — (70) 60 2,850 — 70 2,780 Market Force Information, LLC L+ 11.00% Secured Debt (9) (6,662) 163 453 6,090 804 6,894 — Secured Debt (9) (25,952) 24,342 — 1,610 24,342 25,952 — Member Units (9) (16,642) 16,642 — — 16,642 16,642 — MetalForming AcquireCo, LLC Secured Debt (12) (7) — — 5 — — — — 12.75% Secured Debt (7) — — 1,518 23,576 23 — 23,599 8.00% 8.00% Preferred Equity (7) — 118 148 6,010 235 — 6,245 Common Stock (7) — (137) 619 1,537 — 137 1,400 MH Corbin Holding LLC 13.00% Secured Debt (5) — 1,150 392 4,548 1,150 195 5,503 Preferred Member Units (5) — — — — — — — Preferred Member Units (5) — — — — — — — MSC Adviser I, LLC Member Units (8) — 11,040 5,916 122,930 11,040 — 133,970 Mystic Logistics Holdings, LLC Secured Debt (12) (6) — — 2 — — — — 10.00% Secured Debt (6) — — 289 5,746 — — 5,746 Common Stock (6) — 4,320 1,977 22,830 4,320 — 27,150 OMi Topco, LLC 12.00% Secured Debt (8) — (25) 952 15,750 25 1,525 14,250 Preferred Member Units (8) — 6,500 1,350 22,810 6,500 — 29,310 PPL RVs, Inc. L+ 8.75% Secured Debt (8) — (1) 1 — 1 1 — 13.63% L+ 8.75% Secured Debt (8) — (39) 1,365 21,655 39 1,404 20,290 Common Stock (8) — (880) 157 18,950 — 880 18,070 Common Stock (8) — 12 — 238 12 — 250 Principle Environmental, LLC Secured Debt (8) — — — — — — — 13.00% Secured Debt (8) — — 397 5,806 11 — 5,817 Preferred Member Units (8) — (1,940) 429 12,420 — 1,940 10,480 Common Stock (8) — (90) — 590 — 90 500 Quality Lease Service, LLC Member Units (7) — (98) — 525 33 98 460 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, Robbins Bros. Jewelry, Inc. Secured Debt (12) (9) — — 16 (35) 4 — (31) 12.50% Secured Debt (9) — (444) 2,255 35,404 40 1,119 34,325 Preferred Equity (9) — (8,740) — 14,880 — 8,740 6,140 Trantech Radiator Topco, LLC Secured Debt (12) (7) — (2) 4 — 2 2 — 12.00% Secured Debt (7) — (9) 487 7,920 9 9 7,920 Common Stock (7) — 3,970 58 7,800 3,970 — 11,770 Volusion, LLC 10.00% Secured Debt (8) — — 54 — 2,100 — 2,100 Secured Debt (8) (3,188) 1,821 166 14,914 — 14,914 — Unsecured Convertible Debt (8) (409) 409 — — 409 409 — Preferred Member Units (8) — — — — — — — Preferred Member Units (8) — (706) — — 11,446 706 10,740 Preferred Member Units (8) — — — — — — — Common Stock (8) — (2,576) — — 2,576 2,576 — Warrants (8) — 2,576 — — — — — Ziegler’s NYPD, LLC 12.00% Secured Debt (8) — — 27 450 — — 450 6.50% Secured Debt (8) — — 33 945 — — 945 14.00% Secured Debt (8) — (215) 194 2,676 — 215 2,461 Preferred Member Units (8) — (170) — 240 — 170 70 Warrants (8) — — — — — — — Other controlled investments 2717 MH, L.P. LP Interests (2717 MH, L.P.) (8) 1,677 (675) 141 7,552 2,077 3,283 6,346 LP Interests (2717 HPP-MS, L.P.) (12) (8) — 67 — 248 67 — 315 ASC Interests, LLC 13.00% Secured Debt (12) (8) — — 27 400 — — 400 13.00% Secured Debt (8) — (52) 108 1,649 — 52 1,597 Member Units (8) — (384) — 800 94 384 510 ATS Workholding, LLC 5.00% Secured Debt (9) — (277) — 634 126 277 483 5.00% Secured Debt (9) — (286) — 1,005 — 286 719 Preferred Member Units (9) — — — — — — — Barfly Ventures, LLC 7.00% Secured Debt (12) (5) — — 44 711 — — 711 Member Units (5) — (280) — 3,320 — 280 3,040 Batjer TopCo, LLC Secured Debt (12) (8) — 7 1 (8) 8 — — Secured Debt (12) (8) — — — — — — — 10.00% Secured Debt (8) — 78 583 10,933 92 450 10,575 Preferred Stock (8) — 2,055 574 4,095 2,055 — 6,150 Bolder Panther Group, LLC Secured Debt (9) — — 1 — — — — 14.37% SF+ 9.19% Secured Debt (9) — (71) 6,976 99,194 71 1,390 97,875 8.00% Class B Preferred Member Units (9) — (300) 2,137 31,420 — 300 31,120 Bridge Capital Solutions Corporation 13.00% Secured Debt (6) — — 576 8,813 — — 8,813 13.00% Secured Debt (6) — — 65 1,000 — — 1,000 Preferred Member Units (6) — — 50 1,000 — — 1,000 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, Warrants (6) — 46 — 1,828 46 — 1,874 Warrants (6) — 64 — 2,512 64 — 2,576 CBT Nuggets, LLC Member Units (9) — 1,570 1,647 49,002 1,568 — 50,570 Centre Technologies Holdings, LLC L+ 9.00% Secured Debt (12) (8) — — 6 — — — — 14.25% L+ 9.00% Secured Debt (8) — 64 1,058 14,954 76 — 15,030 Preferred Member Units (8) — 1,700 60 8,700 1,700 — 10,400 Chamberlin Holding LLC SF+ 6.00% Secured Debt (12) (8) — 77 4 — — — — 13.36% SF+ 8.00% Secured Debt (8) — (6) 1,092 16,945 6 544 16,407 Member Units (8) — 1,020 1,491 22,920 1,020 — 23,940 Member Units (8) — 120 46 2,710 120 — 2,830 Charps, LLC 10.00% Unsecured Debt (5) — (17) 300 5,694 17 17 5,694 Preferred Member Units (5) — 460 246 13,340 460 — 13,800 Colonial Electric Company LLC Secured Debt (6) — — 47 — 1,600 1,600 — 12.00% Secured Debt (6) — (500) 1,406 23,151 28 1,130 22,049 Preferred Member Units (6) — 1,440 — — 2,400 — 2,400 Preferred Member Units (6) — (1,480) (1,179) 9,160 — 1,480 7,680 Copper Trail Fund Investments LP Interests (CTMH, LP) (9) — — — 588 — — 588 Digital Products Holdings LLC 15.25% SF+ 10.00% Secured Debt (5) — — 1,141 15,523 — 790 14,733 Preferred Member Units (5) — — 100 9,835 — — 9,835 Garreco, LLC 12.00% L+ 10.00% Secured Debt (8) — — 218 3,826 — 554 3,272 Member Units (8) — (220) 25 1,800 — 220 1,580 Gulf Manufacturing, LLC Member Units (8) — 1,210 1,351 6,790 1,210 — 8,000 Harrison Hydra-Gen, Ltd. Common Stock (8) — 210 — 3,280 210 — 3,490 Johnson Downie Opco, LLC L+ 11.50% Secured Debt (12) (8) — (2) 6 — 2 2 — 16.75% L+ 11.50% Secured Debt (8) — (11) 827 9,999 11 172 9,838 Preferred Equity (8) — 1,010 91 5,540 1,010 — 6,550 JorVet Holdings, LLC 12.00% Secured Debt (9) — — 1,573 25,432 26 — 25,458 Preferred Equity (9) — — 512 10,741 — — 10,741 KBK Industries, LLC 9.00% Secured Debt (5) — 49 320 — 6,000 700 5,300 Member Units (5) — (3,210) 6,496 15,570 — 3,210 12,360 MS Private Loan Fund Secured Debt (12) (8) — — 13 — — — — Secured Debt (8) — — — — — — — LP Interests (12) (8) — (198) 776 14,833 — 198 14,635 MSC Income Fund, Inc. Common Equity (8) — (65) 32 753 2,000 65 2,688 NAPCO Precast, LLC Member Units (8) — 880 — 11,830 880 — 12,710 Nebraska Vet AcquireCo, LLC L+ 7.00% Secured Debt (12) (5) — — 5 — — — — 12.00% Secured Debt (5) — 6 1,258 20,094 1,200 — 21,294 12.00% Secured Debt (5) — (11) 644 10,500 11 11 10,500 Preferred Member Units (5) — 5,090 302 7,700 5,090 — 12,790 NexRev LLC Secured Debt (12) (8) — — — — — — — 10.00% Secured Debt (8) — 1,500 616 8,477 1,545 1,654 8,368 Preferred Member Units (8) — 2,340 151 1,110 2,340 — 3,450 NRP Jones, LLC 12.00% Secured Debt (5) — — 126 2,080 — — 2,080 Member Units (5) — (750) 36 4,615 — 750 3,865 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, Member Units (5) — (31) (2) 175 — 30 145 NuStep, LLC 11.75% L+ 6.50% Secured Debt (5) — — 251 4,399 — — 4,399 12.00% Secured Debt (5) — — 1,119 18,414 6 — 18,420 Preferred Member Units (5) — 340 — 8,040 340 — 8,380 Preferred Member Units (5) — — — 5,150 — — 5,150 Orttech Holdings, LLC L+ 11.00% Secured Debt (12) (5) — — — — — — — 16.25% L+ 11.00% Secured Debt (5) — 142 1,863 23,429 171 800 22,800 Preferred Stock (5) — 4,810 537 11,750 4,810 — 16,560 Pearl Meyer Topco LLC 12.00% Secured Debt (12) (6) — 4 142 — 3,500 — 3,500 12.00% Secured Debt (6) — 40 534 — 13,500 — 13,500 12.00% Secured Debt (6) — (35) 1,722 28,681 35 1,035 27,681 Preferred Equity (6) — 830 5,708 43,260 830 — 44,090 River Aggregates, LLC Member Units (8) — — — 3,620 — — 3,620 Tedder Industries, LLC 12.00% Secured Debt (9) — — 111 1,840 — — 1,840 12.00% Secured Debt (9) — — 923 15,120 7 — 15,127 Preferred Member Units (9) — (1,391) — 7,681 — 1,391 6,290 Preferred Member Units (9) — 178 — — 533 — 533 Televerde, LLC Member Units (8) — 674 592 5,408 674 — 6,082 Preferred Stock (8) — — — 1,794 — — 1,794 Vision Interests, Inc. Series A Preferred Stock (9) — — 168 3,000 — — 3,000 VVS Holdco LLC L+ 6.00% Secured Debt (12) (5) — — 15 (21) 11 — (10) 11.50% Secured Debt (5) — — 1,768 30,161 39 1,242 28,958 Preferred Equity (5) — (100) 215 11,940 — 100 11,840 UnionRock Energy Fund III, LP LP Interests (12) (9) — — — — 150 — 150 — — — — — — — — — — — — — — Other — — — — — — — Amounts related to investments transferred to or from other 1940 Act classification during the period — — (171) (14,914) — — — Total Control investments $ (51,077) $ 92,940 $ 96,841 $ 1,703,172 $ 338,651 $ 173,038 $ 1,883,699 Affiliate Investments 423 HAR, LP LP Interests (423 HAR, L.P.) (8) $ — $ — $ — $ — $ 750 $ — $ 750 AAC Holdings, Inc. 18.00% 18.00% Secured Debt (12) (7) — (16) 27 — 376 16 360 18.00% 18.00% Secured Debt (7) — (558) 1,149 11,550 1,149 558 12,141 Common Stock (7) — — — — — — — Warrants (7) — — — — — — — AFG Capital Group, LLC Preferred Member Units (8) 7,200 (8,200) — 9,400 7,200 16,600 — ATX Networks Corp. L+ 7.50% Secured Debt (6) — (134) 886 6,343 575 6,918 — Unsecured Debt (6) — (306) 1,160 2,598 1,160 3,758 — Common Stock (6) 3,248 (3,270) — 3,270 3,248 6,518 — BBB Tank Services, LLC 16.17% L+ 11.00% Unsecured Debt (8) — — 63 800 — — 800 16.17% L+ 11.00% Unsecured Debt (8) — 116 317 2,086 116 — 2,202 Member Units (8) — — — — — — — Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, 15.00% Preferred Stock (non-voting) (8) — — — — — — — Boccella Precast Products LLC 10.00% Secured Debt (6) — — 16 320 — — 320 Member Units (6) — (620) 41 2,970 — 620 2,350 Buca C, LLC 12.00% Secured Debt (7) — — 1,044 12,337 — 373 11,964 6.00% 6.00% Preferred Member Units (7) — — — — — — — Career Team Holdings, LLC 11.25% L+ 6.00% Secured Debt (12) (6) — — 10 (9) 451 — 442 12.50% Secured Debt (6) — — 1,293 20,090 20 — 20,110 Common Stock (6) — — — 4,500 — — 4,500 Chandler Signs Holdings, LLC Class A Units (8) 1,797 (290) 60 1,790 1,797 3,587 — Classic H&G Holdings, LLC 11.25% L+ 6.00% Secured Debt (12) (6) — — 260 4,560 — — 4,560 8.00% Secured Debt (6) — (21) 797 19,274 21 21 19,274 Preferred Member Units (6) — (6,410) 4,745 24,637 — 6,407 18,230 Congruent Credit Opportunities Funds LP Interests (Congruent Credit Opportunities Fund III, LP) (8) — (223) 316 7,657 — 2,095 5,562 DMA Industries, LLC 12.00% Secured Debt (7) — (21) 1,272 21,200 21 1,221 20,000 Preferred Equity (7) — — — 7,260 — — 7,260 Dos Rios Partners LP Interests (Dos Rios Partners, LP) (8) 757 156 — 9,127 915 904 9,138 LP Interests (Dos Rios Partners - A, LP) (8) 241 — — 2,898 241 287 2,852 Dos Rios Stone Products LLC Class A Preferred Units (8) — 250 — 1,330 250 — 1,580 EIG Fund Investments LP Interests (EIG Global Private Debt Fund-A, L.P.) (8) 16 — 43 1,013 16 55 974 Flame King Holdings, LLC L+ 6.50% Secured Debt (9) — (60) 484 7,600 60 7,660 — L+ 9.00% Secured Debt (9) — (162) 1,583 21,200 162 21,362 — Preferred Equity (9) — 6,770 2,050 17,580 6,770 — 24,350 Freeport Financial SBIC Fund LP LP Interests (Freeport Financial SBIC Fund LP) (12) (5) — 145 — 3,483 145 — 3,628 LP Interests (Freeport First Lien Loan Fund III LP) (12) (5) — — 291 5,848 — 536 5,312 GFG Group, LLC 9.00% Secured Debt (5) — (12) 525 11,345 12 12 11,345 Preferred Member Units (5) — 1,170 102 7,140 1,170 — 8,310 Hawk Ridge Systems, LLC 11.53% SF+ 6.00% Secured Debt (12) (9) — — 173 3,185 4,581 4,100 3,666 12.50% Secured Debt (9) — 4 2,173 37,800 4,142 — 41,942 Preferred Member Units (9) — — 131 17,460 — — 17,460 Preferred Member Units (9) — — — 920 — — 920 Houston Plating and Coatings, LLC 8.00% Unsecured Convertible Debt (8) — (170) 121 3,000 — 170 2,830 Member Units (8) — 1,160 2 2,400 1,160 — 3,560 HPEP 3, L.P. LP Interests (HPEP 3, L.P.) (12) (8) — 283 — 4,331 283 508 4,106 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, LP Interests (HPEP 4, L.P.) (12) (8) — — — 2,332 464 — 2,796 LP Interests (423 COR, LP) (12) (8) — — 117 1,400 — — 1,400 I-45 SLF LLC Member Units (Fully diluted 20.0%; 21.75% profits interest) (8) — (1,207) 1,123 11,758 1,200 1,207 11,751 Infinity X1 Holdings, LLC 13.00% Secured Debt (9) — — 790 — 17,832 — 17,832 Preferred Equity (9) — — — — 4,000 — 4,000 Integral Energy Services 13.04% L+ 7.50% Secured Debt (8) — (227) 1,036 15,769 33 227 15,575 Common Stock (8) — (460) 21 1,280 — 460 820 Iron-Main Investments, LLC 13.50% Secured Debt (5) — — 307 4,500 4 20 4,484 13.50% Secured Debt (5) — — 214 3,130 3 14 3,119 13.50% Secured Debt (5) — — 600 8,944 — — 8,944 13.50% Secured Debt (5) — — 1,337 19,559 17 88 19,488 13.50% Secured Debt (5) — — 890 — 10,857 38 10,819 Common Stock (5) — — — 1,798 958 — 2,756 ITA Holdings Group, LLC SF+ 9.00% 2.00% Secured Debt (12) (8) — — 12 — — 12 (12) SF+ 9.00% 2.00% Secured Debt (12) (8) — — — — — 10 (10) 15.38% SF+ 8.00% 2.00% Secured Debt (8) — — 84 — 3,252 — 3,252 17.38% SF+ 10.00% 2.00% Secured Debt (8) — — 86 — 3,252 — 3,252 Warrants (8) — — — — 2,091 — 2,091 OnAsset Intelligence, Inc. 12.00% 12.00% Secured Debt (8) — (127) — 569 — 128 441 12.00% 12.00% Secured Debt (8) — (130) — 580 — 130 450 12.00% 12.00% Secured Debt (8) — (280) — 1,249 — 280 969 12.00% 12.00% Secured Debt (8) — (584) — 2,606 — 584 2,022 10.00% 10.00% Unsecured Debt (8) — — — 305 — — 305 7.00% 7.00% Preferred Stock (8) — — — — — — — Common Stock (8) — — — — — — — Warrants (8) — — — — — — — Oneliance, LLC L+ 11.00% Secured Debt (7) — — — — — — — 16.25% L+ 11.00% Secured Debt (7) — (61) 447 5,559 6 141 5,424 Preferred Stock (7) — — — 1,056 72 — 1,128 Quality Lease Service, LLC Secured Debt (8) (29,526) 29,865 — — 29,865 29,865 — Preferred Member Units (8) — — — — — — — SI East, LLC Secured Debt (12) (7) — — 14 — — — — 12.78% Secured Debt (7) — 268 568 — 54,536 — 54,536 Secured Debt (7) — (79) 3,885 89,786 — 89,786 — Preferred Member Units (7) — 1,823 639 13,650 2,130 — 15,780 Slick Innovations, LLC 14.00% Secured Debt (6) — (22) 980 13,840 22 822 13,040 Common Stock (6) — 320 — 1,530 320 — 1,850 Student Resource Center, LLC 8.50% 8.50% Secured Debt (6) — — 216 4,556 214 — 4,770 Preferred Equity (6) — — — — — — — Superior Rigging & Erecting Co. 12.00% Secured Debt (7) — — 1,285 21,378 27 1,000 20,405 Preferred Member Units (7) — 1,140 — 4,500 1,140 — 5,640 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, The Affiliati Network, LLC Secured Debt (9) — — 12 106 1,962 2,080 (12) 13.00% Secured Debt (9) — (129) 607 9,442 15 729 8,728 Preferred Stock (9) — — 80 6,400 — — 6,400 UnionRock Energy Fund II, LP LP Interests (12) (9) — (964) 25 5,855 531 1,162 5,224 UniTek Global Services, Inc. SF+ 7.50% Secured Debt (6) — 22 (2) 382 25 407 — SF+ 7.50% Secured Debt (6) — 96 282 1,712 112 1,824 — 15.00% 15.00% Secured Convertible Debt (6) — 1,380 187 4,592 1,567 — 6,159 20.00% 20.00% Preferred Stock (6) — (221) 221 2,833 221 221 2,833 20.00% 20.00% Preferred Stock (6) — 1,668 — 1,991 1,668 — 3,659 19.00% 19.00% Preferred Stock (6) — — — — — — — 13.50% 13.50% Preferred Stock (6) — — — — — — — Common Stock (6) — — — — — — — Universal Wellhead Services Holdings, LLC 14.00% 14.00% Preferred Member Units (8) — — — 220 — — 220 Member Units (8) — — — — — — — World Micro Holdings, LLC 13.00% Secured Debt (7) — — 948 14,140 14 — 14,154 Preferred Equity (7) — — 139 3,845 — — 3,845 Other — — — — — — — Amounts related to investments transferred to or from other 1940 Act classification during the period — — 171 14,914 — — — Total Affiliate investments $ (16,267) $ 21,672 $ 38,455 $ 618,359 $ 175,201 $ 215,521 $ 563,125 ____________________ (1) The principal amount, the ownership detail for equity investments and if the investment is income producing is included in the Consolidated Schedule of Investments included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. (2) Represents the total amount of interest, fees and dividends credited to income for the portion of the period for which an investment was included in Control or Affiliate categories, respectively. For investments transferred between Control and Affiliate categories during the period, any income or investment balances related to the time period it was in the category other than the one shown at period end is included in “Amounts related to investments transferred from other 1940 Act classifications during the period.” (3) Gross additions include increases in the cost basis of investments resulting from new portfolio investments, follow-on investments and accrued PIK interest, and the exchange of one or more existing securities for one or more new securities. Gross additions also include net increases in unrealized appreciation or net decreases in net unrealized depreciation as well as the movement of an existing portfolio company into this category and out of a different category. (4) Gross reductions include decreases in the cost basis of investments resulting from principal repayments or sales and the exchange of one or more existing securities for one or more new securities. Gross reductions also include net increases in net unrealized depreciation or net decreases in unrealized appreciation as well as the movement of an existing portfolio company out of this category and into a different category. (5) Portfolio company located in the Midwest region as determined by location of the corporate headquarters. The fair value as of June 30, 2023 for control investments located in this region was $453,692. This represented 24.1% of net assets as of June 30, 2023. The fair value as of June 30, 2023 for affiliate investments located in this region was $78,205. This represented 13.9% of net assets as of June 30, 2023. (6) Portfolio company located in the Northeast region and Canada as determined by location of the corporate headquarters. The fair value as of June 30, 2023 for control investments located in this region was $283,469. This represented 15.0% of net assets as of June 30, 2023. The fair value as of June 30, 2023 for affiliate investments located in this region was $102,097. This represented 18.1% of net assets as of June 30, 2023. (7) Portfolio company located in the Southeast region as determined by location of the corporate headquarters. The fair value as of June 30, 2023 for control investments located in this region was $51,394. This represented 2.7% of net assets as of June 30, 2023. The fair value as of June 30, 2023 for affiliate investments located in this region was $172,637. This represented 30.7% of net assets as of June 30, 2023. (8) Portfolio company located in the Southwest region as determined by location of the corporate headquarters. The fair value as of June 30, 2023 for control investments located in this region was $655,449. This represented 34.8% of net assets as of June 30, 2023. The fair value as of June 30, 2023 for affiliate investments located in this region was $79,676. This represented 14.1% of net assets as of June 30, 2023. (9) Portfolio company located in the West region as determined by location of the corporate headquarters. The fair value as of June 30, 2023 for control investments located in this region was $439,695. This represented 23.3% of net assets as of June 30, 2023. The fair value as of June 30, 2023 for affiliate investments located in this region was $130,510. This represented 23.2% of net assets as of June 30, 2023. (10) All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities,” unless otherwise noted. (11) This schedule should be read in conjunction with the Consolidated Schedule of Investments and Notes to the Consolidated Financial Statements included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. Supplemental information can be located within the Consolidated Schedule of Investments including end of period interest rate, preferred dividend rate, maturity date, investments not paid currently in cash and investments whose value was determined using significant unobservable inputs. (12) Investment has an unfunded commitment as of June 30, 2023 (see Note K ). The fair value of the investment includes the impact of the fair value of any unfunded commitments. (13) Negative fair value is the result of the capitalized discount being greater than the principal amount outstanding on the loan. Company Total Rate Base Rate Spread PIK Rate Type of Investment(1)(10)(11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, Majority-owned investments Analytical Systems Keco Holdings, LLC 12.00% L+ 10.00% Secured Debt (8) $ — $ — $ 339 $ 4,736 $ 45 $ 140 $ 4,641 Preferred Member Units (8) — (576) — 4,894 — 576 4,318 Brewer Crane Holdings, LLC 11.06% L+ 10.00% Secured Debt (9) — — 448 8,037 12 248 7,801 Preferred Member Units (9) — (660) 530 7,710 — 660 7,050 Café Brazil, LLC Member Units (8) — (50) 99 2,570 — 50 2,520 California Splendor Holdings LLC 11.00% L+ 10.00% Secured Debt (9) — 56 1,578 27,915 85 — 28,000 15.00% 15.00% Preferred Member Units (9) — — 652 9,510 652 6,449 3,713 Preferred Member Units (9) — 6,020 125 13,275 6,020 — 19,295 Clad-Rex Steel, LLC 10.63% L+ 9.50% Secured Debt (5) — — 574 10,401 20 — 10,421 10.00% Secured Debt (5) — — 54 1,071 — 16 1,055 Member Units (5) — 80 — 530 80 — 610 Member Units (5) — — 764 10,250 — — 10,250 CMS Minerals Investments Member Units (9) — 447 69 1,974 447 147 2,274 Cody Pools, Inc. 12.25% L+ 10.50% Secured Debt (8) — (45) 2,702 42,484 2,910 3,757 41,637 Preferred Member Units (8) — 3,550 1,749 47,640 3,550 — 51,190 CompareNetworks Topco, LLC 10.13% L+ 9.00% Secured Debt (9) — (10) 308 6,477 10 746 5,741 Preferred Member Units (9) — 5,230 316 12,000 5,230 — 17,230 Datacom, LLC 7.50% Secured Debt (8) — — 416 7,668 84 135 7,617 Preferred Member Units (8) — 60 48 2,610 60 — 2,670 Direct Marketing Solutions, Inc. 12.13% L+ 11.00% Secured Debt (9) — (20) 1,551 24,048 1,317 687 24,678 Preferred Stock (9) — 3,200 686 18,350 3,200 — 21,550 Gamber-Johnson Holdings, LLC 10.50% L+ 8.00% Secured Debt (5) — (11) 1,100 21,598 11 11 21,598 Member Units (5) — (3,400) 360 49,700 — 3,400 46,300 GRT Rubber Technologies LLC 9.06% L+ 8.00% Secured Debt (8) — (22) 1,676 38,885 22 22 38,885 Member Units (8) — — 2,441 46,190 — — 46,190 Jensen Jewelers of Idaho, LLC 10.00% P+ 6.75% Secured Debt (9) — (4) 130 2,550 4 104 2,450 Member Units (9) — 2,700 1,376 12,420 2,700 — 15,120 Kickhaefer Manufacturing Company, LLC 11.50% Secured Debt (5) — — 1,205 20,324 25 — 20,349 9.00% Secured Debt (5) — — 177 3,876 1 17 3,860 Member Units (5) — (70) — 12,310 — 70 12,240 Member Units (5) — — 55 2,460 — — 2,460 Market Force Information, LLC 12.13% L+ 11.00% Secured Debt (9) — — 217 3,400 1,000 — 4,400 12.00% 12.00% Secured Debt (9) — (1,405) — 8,936 — 1,405 7,531 MH Corbin Holding LLC 13.00% Secured Debt (5) — (1,495) 540 5,934 9 1,655 4,288 MSC Adviser I, LLC Member Units (8) — (22,080) 3,983 140,400 — 22,080 118,320 Mystic Logistics Holdings, LLC 10.00% Secured Debt (6) — (1) 312 6,378 1 281 6,098 Common Stock (6) — 7,370 1,596 8,840 7,370 — 16,210 OMi Topco, LLC 12.00% Secured Debt (8) — (29) 1,099 18,000 29 1,279 16,750 Preferred Member Units (8) — 90 1,197 20,210 90 — 20,300 PPL RVs, Inc. 7.97% L+ 7.00% Secured Debt (8) — 251 683 12,381 9,264 2,000 19,645 Common Stock (8) — 4,130 462 14,360 4,130 — 18,490 Principle Environmental, LLC 13.00% Secured Debt (8) — — 86 1,465 6 1,000 471 13.00% Secured Debt (8) — — 399 5,808 12 — 5,820 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1)(10)(11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, Preferred Member Units (8) — 370 437 11,160 370 — 11,530 Common Stock (8) — 30 — 710 30 — 740 Quality Lease Service, LLC Member Units (7) — 76 — 2,149 76 1,150 1,075 Robbins Bros. Jewelry, Inc. 12.00% L+ 11.00% Secured Debt (9) — — 2,241 35,956 43 225 35,774 Preferred Equity (9) — 4,670 279 11,070 4,670 — 15,740 Trantech Radiator Topco, LLC 12.00% Secured Debt (7) — (12) 528 8,712 14 412 8,314 Common Stock (7) — (570) 58 8,660 — 570 8,090 Ziegler’s NYPD, LLC 12.00% Secured Debt (8) — — 38 625 — — 625 6.50% Secured Debt (8) — — 33 1,000 — — 1,000 14.00% Secured Debt (8) — — 194 2,750 — — 2,750 Preferred Member Units (8) — (450) — 2,130 — 450 1,680 Other controlled investments 2717 MH, L.P. LP Interests (2717 MH, L.P.) (8) — 1,408 — 3,971 2,583 — 6,554 LP Interests (2717 HPP-MS, L.P.) (8) — — — — 244 — 244 ASC Interests, LLC 13.00% Secured Debt (8) — — 13 200 — 30 170 13.00% Secured Debt (8) — — 120 1,636 12 — 1,648 Member Units (8) — 80 — 720 80 — 800 ATS Workholding, LLC 5.00% Secured Debt (9) — — — 3,005 — 66 2,939 Barfly Ventures, LLC 7.00% Secured Debt (5) — — 25 711 — — 711 Member Units (5) — 470 — 1,930 470 — 2,400 Batjer TopCo, LLC 11.00% Secured Debt (8) — — 512 — 11,372 459 10,913 Member Units (8) — — — — 4,073 — 4,073 Bolder Panther Group, LLC 10.50% L+ 9.00% Secured Debt (9) — (39) 2,491 39,000 10,233 39 49,194 Class B Preferred Member Units (9) — 2,760 276 23,170 2,760 — 25,930 Bridge Capital Solutions Corporation 13.00% Secured Debt (6) — — 576 8,813 — — 8,813 13.00% Secured Debt (6) — — 65 1,000 — — 1,000 Preferred Member Units (6) — — 50 1,000 — — 1,000 Warrants (6) — 200 — 4,060 200 — 4,260 CBT Nuggets, LLC Member Units (9) — (2,720) 1,647 50,620 — 2,720 47,900 Centre Technologies Holdings, LLC 12.00% L+ 10.00% Secured Debt (8) — 507 838 8,864 7,903 1,826 14,941 Preferred Member Units (8) — 768 60 5,840 1,050 — 6,890 Chamberlin Holding LLC 9.13% L+ 8.00% Secured Debt (8) — (35) 845 17,817 35 386 17,466 Member Units (8) — (1,630) 348 24,140 — 1,630 22,510 Member Units (8) — — 34 1,540 — — 1,540 Charps, LLC 10.00% Unsecured Debt (5) — (27) 309 5,694 27 27 5,694 Preferred Member Units (5) — (540) 417 13,990 — 540 13,450 Colonial Electric Company LLC 12.00% Secured Debt (6) — — 1,703 24,351 1,630 630 25,351 Preferred Member Units (6) — (190) 805 9,130 — 190 8,940 Copper Trail Fund Investments LP Interests (CTMH, LP) (9) — — — 710 — — 710 Digital Products Holdings LLC 11.13% L+ 10.00% Secured Debt (5) — — 929 16,801 23 661 16,163 Preferred Member Units (5) — — 100 9,835 — — 9,835 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1)(10)(11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, Flame King Holdings, LLC 7.50% L+ 6.50% Secured Debt (9) — 68 288 6,324 1,276 — 7,600 12.00% L+ 11.00% Secured Debt (9) — 183 1,300 20,996 204 — 21,200 Preferred Equity (9) — 3,010 559 10,400 3,010 — 13,410 Garreco, LLC 9.00% L+ 8.00% Secured Debt (8) — — 190 4,196 — — 4,196 Member Units (8) — 220 321 2,270 220 — 2,490 Gulf Manufacturing, LLC Member Units (8) — (130) 985 5,640 — 130 5,510 Gulf Publishing Holdings, LLC 10.60% 5.25% Secured Debt (8) — — 7 257 — — 257 12.50% 6.25% Secured Debt (8) — (2,188) 426 9,717 — 2,188 7,529 Harrison Hydra-Gen, Ltd. Common Stock (8) — (200) — 3,530 — 200 3,330 Johnson Downie Opco, LLC 13.00% L+ 11.50% Secured Debt (8) — 92 755 11,344 115 1,038 10,421 Preferred Equity (8) — 2,730 566 3,150 2,730 — 5,880 JorVet Holdings, LLC 12.00% Secured Debt (9) — — 1,082 — 25,406 — 25,406 Common Stock (9) — — 54 — 10,741 — 10,741 KBK Industries, LLC Member Units (5) — 310 685 13,620 310 — 13,930 MS Private Loan Fund LP Interests (8) — (544) 191 2,581 8,750 544 10,787 MSC Income Fund, Inc. Common Equity (8) — — — — 750 — 750 NAPCO Precast, LLC Member Units (8) — (1,730) 4 13,560 — 1,730 11,830 Nebraska Vet AcquireCo, LLC 12.00% Secured Debt (5) — — 649 10,412 11 — 10,423 12.00% Secured Debt (5) — — 548 4,829 6,544 — 11,373 Preferred Member Units (5) — — — 7,700 — — 7,700 NexRev LLC 11.00% Secured Debt (8) — (1,703) 1,222 14,045 — 5,783 8,262 Preferred Member Units (8) — (3,080) 40 2,690 — 1,750 940 NRP Jones, LLC 12.00% Secured Debt (5) — — 126 2,080 — — 2,080 Member Units (5) — (970) 198 6,440 — 970 5,470 NuStep, LLC 7.63% L+ 6.50% Secured Debt (5) — — 110 1,720 1,480 — 3,200 12.00% Secured Debt (5) — 28 1,043 17,240 1,200 — 18,440 Preferred Member Units (5) — (1,940) — 13,500 — 1,940 11,560 Orttech Holdings, LLC 12.00% L+ 11.00% Secured Debt (5) — — 1,494 24,150 29 400 23,779 Preferred Stock (5) — — 386 10,000 — — 10,000 Pearl Meyer Topco LLC 12.00% Secured Debt (6) — (61) 1,942 32,674 1,561 5,554 28,681 Member Units (6) — 12,780 2,856 26,970 12,780 — 39,750 River Aggregates, LLC Member Units (8) — 100 — 3,280 100 — 3,380 Tedder Industries, LLC 12.00% Secured Debt (9) — — 961 15,141 44 — 15,185 12.00% Secured Debt (9) — — 102 1,040 800 — 1,840 Preferred Member Units (9) — (1,487) — 8,579 222 1,487 7,314 Televerde, LLC Member Units (8) — (2,135) — 7,280 — 2,135 5,145 Preferred Stock (8) — 1,076 — — 1,794 — 1,794 Vision Interests, Inc. Series A Preferred Stock (9) — — 144 3,000 — — 3,000 VVS Holdco LLC 11.50% Secured Debt (5) — — 1,821 31,269 34 1,201 30,102 Prefe

N-2

N-2 - $ / shares	6 Months Ended
N-2 - $ / shares	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Cover [Abstract]
Entity Central Index Key	0001396440
Amendment Flag	false
Securities Act File Number	001-33723
Document Type	10-Q
Entity Registrant Name	Main Street Capital Corporation
Entity Address, Address Line One	1300 Post Oak Boulevard
Entity Address, Address Line Two	8th Floor
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77056
City Area Code	713
Local Phone Number	350-6000
Entity Emerging Growth Company	false
General Description of Registrant [Abstract]
Investment Objectives and Practices [Text Block]	OVERVIEW OF OUR BUSINESS Our principal investment objective is to maximize our portfolio’s total return by generating current income from our debt investments and current income and capital appreciation from our equity and equity-related investments, including warrants, convertible securities and other rights to acquire equity securities in a portfolio company. We seek to achieve our investment objective through our LMM, Private Loan (as defined below) and Middle Market investment strategies. Our LMM investment strategy involves investments in companies that generally have annual revenues between $10 million and $150 million and our LMM portfolio investments generally range in size from $5 million to $75 million. Our private loan (“Private Loan”) investment strategy involves investments in companies that are consistent with the size of the companies in our LMM and Middle Market investment strategies, and our Private Loan investments generally range in size from $10 million to $75 million. Our Middle Market investment strategy involves investments in companies that are generally larger in size than our LMM companies, with annual revenues typically between $150 million and $1.5 billion, and our Middle Market investments generally range in size from $3 million to $25 million. We seek to fill the financing gap for LMM businesses, which, historically, have had limited access to financing from commercial banks and other traditional sources. The underserved nature of the LMM creates the opportunity for us to meet the financing needs of LMM companies while also negotiating favorable transaction terms and equity participation. Our ability to invest across a company’s capital structure, from secured loans to equity securities, allows us to offer portfolio companies a comprehensive suite of financing options, or a “one stop” financing solution. Providing customized, “one-stop” financing solutions is important to LMM portfolio companies. We generally seek to partner directly with entrepreneurs, management teams and business owners in making our investments. Our LMM portfolio debt investments are generally secured by a first lien on the assets of the portfolio company and typically have a term of between five and seven years from the original investment date. Private Loan investments primarily consist of debt securities that have primarily been originated directly by us or, to a lesser extent, through our strategic relationships with other investment funds on a collaborative basis through investments that are often referred to in the debt markets as “club deals” because of the small lender group size. Our Private Loan investments are typically made to support a company owned by or in the process of being acquired by a private equity sponsor. Private Loan investments are typically similar in size, structure, terms and conditions to investments we hold in our LMM portfolio and Middle Market portfolio. Our Private Loan portfolio debt investments are generally secured by a first priority lien on the assets of the portfolio company and typically have a term of between three and seven years from the original investment date. We may also invest alongside the private equity sponsor in the equity securities of our Private Loan portfolio companies. Our Middle Market portfolio investments primarily consist of direct investments in or secondary purchases of interest-bearing syndicated loans or debt securities in privately held companies based in the United States that are generally larger in size than the companies included in our LMM portfolio. Our Middle Market portfolio debt investments are generally secured by a first priority lien on the assets of the portfolio company and typically have an expected duration of between three and seven years from the original investment date. Our other portfolio (“Other Portfolio”) investments primarily consist of investments that are not consistent with the typical profiles for our LMM, Private Loan or Middle Market portfolio investments, including investments which may be managed by third parties. In our Other Portfolio, we may incur indirect fees and expenses in connection with investments managed by third parties, such as investments in other investment companies or private funds. Subject to changes in our cash and overall liquidity, our Investment Portfolio (as defined below) may also include short-term portfolio investments that are atypical of our LMM, Private Loan and Middle Market portfolio investments in that they are intended to be a short-term deployment of capital. These assets are typically expected to be liquidated in one year or less and are not expected to be a significant portion of the overall Investment Portfolio. The “Investment Portfolio”, as used herein, refers to all of our investments in LMM companies (including both our LMM and Private Loan portfolio investments) and investments in Middle Market companies (including both our Private Loan and Middle Market portfolio investments), Other Portfolio investments and our investment in the External Investment Manager. Our external asset management business is conducted through the External Investment Manager. The External Investment Manager earns management fees based on the assets of the funds under management and may earn incentive fees, or a carried interest, based on the performance of the funds managed. Our portfolio investments are generally made through MSCC, the Taxable Subsidiaries, the Funds and the Structured Subsidiaries. MSCC, the Taxable Subsidiaries, the Funds and the Structured Subsidiaries share the same investment strategies and criteria, although they are subject to different regulatory regimes (see Regulation ). An investor’s return in MSCC will depend, in part, on the Taxable Subsidiaries’, the Funds’ and the Structured Subsidiaries’ investment returns as they are wholly-owned subsidiaries of MSCC. The level of new portfolio investment activity will fluctuate from period to period based upon our view of the current economic fundamentals, our ability to identify new investment opportunities that meet our investment criteria, and our ability to consummate the identified opportunities. The level of new investment activity, and associated interest and fee income, will directly impact future investment income. In addition, the level of dividends paid by portfolio companies and the portion of our portfolio debt investments on non-accrual status will directly impact future investment income. While we intend to grow our portfolio and our investment income over the long term, our growth and our operating results may be more limited during depressed economic periods. However, we intend to appropriately manage our cost structure and liquidity position based on applicable economic conditions and our investment outlook. The level of realized gains or losses and unrealized appreciation or depreciation on our investments will also fluctuate depending upon portfolio activity, economic conditions and the performance of our individual portfolio companies. The changes in realized gains and losses and unrealized appreciation or depreciation could have a material impact on our operating results. Because we are internally managed, we do not pay any external investment advisory fees, but instead directly incur the operating costs associated with employing investment and portfolio management professionals. We believe that our internally managed structure provides us with a better alignment of interests between our management team and our employees and our shareholders and a beneficial operating expense structure when compared to other publicly traded and privately held investment firms which are externally managed, and our internally managed structure allows us the opportunity to leverage our non-interest operating expenses as we grow our Investment Portfolio and our External Investment Manager’s asset management business (as defined below). The ratio of our total operating expenses, excluding interest expense, as a percentage of our quarterly average total assets was 1.4% and 1.5%, for the trailing twelve months ended June 30, 2023 and 2022, respectively, and 1.4% for the year ended December 31, 2022. The ratio of our total operating expenses, including interest expense, as a percentage of our quarterly average total assets was 3.7% and 3.3% for the trailing twelve months ended June 30, 2023 and 2022, respectively, and 3.3% for the year ended December 31, 2022. Our ratio of expenses as a percentage of our average net asset value is described in greater detail in Note F – Financial Highlights to the consolidated financial statements included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. The External Investment Manager serves as the investment adviser and administrator to MSC Income pursuant to an Investment Advisory and Administrative Services Agreement entered into in October 2020 between the External Investment Manager and MSC Income (the “Advisory Agreement”). Under the Advisory Agreement, the External Investment Manager earns a 1.75% annual base management fee on MSC Income’s average total assets, an incentive fee equal to 20% of pre-investment fee net investment income above a specified investment return hurdle rate and a 20% incentive fee on cumulative net realized capital gains in exchange for providing advisory services to MSC Income. Additionally, the External Investment Manager has entered into an Investment Management Agreement with MS Private Loan Fund I, LP, a private investment fund with a strategy to co-invest with Main Street in Private Loan portfolio investments (the “Private Loan Fund”), pursuant to which the External Investment Manager provides investment advisory and management services to the Private Loan Fund in exchange for an asset-based fee and certain incentive fees. The External Investment Manager may also advise other clients, including funds and separately managed accounts, pursuant to advisory and services agreements with such clients in exchange for asset-based and incentive fees. The External Investment Manager earns management fees based on the assets of the funds and accounts under management and may earn incentive fees, or a carried interest, based on the performance of the funds and accounts managed. The total contribution of the External Investment Manager to our net investment income consists of the combination of the expenses allocated to the External Investment Manager and the dividend income earned from the External Investment Manager. The total contribution to our net investment income was $8.5 million and $5.2 million for the three months ended June 30, 2023 and 2022, respectively. During the three months ended June 30, 2023 and 2022, the External Investment Manager earned base management fee income of $5.5 million and $5.4 million, respectively, incentive fee income of $3.7 million and $0.1 million, respectively, and administrative services fee income of $0.2 million in each period. Our total expenses are net of expenses allocated to the External Investment Manager for the three months ended June 30, 2023 and 2022 of $5.7 million and $3.5 million, respectively. The total contribution to our net investment income was $16.6 million and $10.3 million for the six months ended June 30, 2023 and 2022, respectively. During the six months ended June 30, 2023 and 2022, the External Investment Manager earned base management fee income of $11.0 million and $10.9 million, respectively, incentive fee income of $7.0 million and $0.2 million, respectively, and administrative services fee income of $0.3 million in each period. Our total expenses are net of expenses allocated to the External Investment Manager for the six months ended June 30, 2023 and 2022 of $10.7 million and $6.3 million, respectively. We have received an exemptive order from the SEC permitting co-investments among us, MSC Income and other funds and clients advised by the External Investment Manager in certain negotiated transactions where co-investing would otherwise be prohibited under the 1940 Act. We have made co-investments with, and in the future intend to continue to make co-investments with MSC Income, the Private Loan Fund and other clients advised by the External Investment Manager, in accordance with the conditions of the order. The order requires, among other things, that we and the External Investment Manager consider whether each such investment opportunity is appropriate for us and the External Investment Manager’s advised clients, as applicable, and if it is appropriate, to propose an allocation of the investment opportunity between such parties. Because the External Investment Manager may receive performance-based fee compensation from funds and clients advised by the External Investment Manager, this may provide the Company and the External Investment Manager an incentive to allocate opportunities to other participating funds and clients instead of us. However, both we and the External Investment Manager have policies and procedures in place to manage this conflict, including oversight by the independent members of our Board of Directors. In addition to the co-investment program described above, we also co-invest in syndicated deals and other transactions where price is the only negotiated point by us and our affiliates.
Risk Factors [Table Text Block]	Risk Factors You should carefully consider the risks described below and all other information contained in this Quarterly Report on Form 10-Q, including our interim consolidated financial statements and the related notes thereto, before making a decision to purchase our securities. The risks and uncertainties described below are not the only ones facing us. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may have a material adverse effect on our business, financial condition and/or operating results, as well as the market price of our securities. In addition to the other information set forth in this report, you should carefully consider the risk factors described in Part I, Item 1A. Risk Factors in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022 that we filed with the SEC on February 24, 2023 and in our Quarterly Report on Form 10-Q for the quarter ended March 31, 2023 that we filed with the SEC on May 5, 2023, which could materially affect our business, financial condition and/or operating results. There are no material changes to the risk factors as previously disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022 and in our Quarterly Report on Form 10-Q for the quarter ended March 31, 2023.
NAV Per Share	$ 27.69	$ 26.86	$ 25.37	$ 25.29

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	6 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Jun. 30, 2023
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Main Street’s consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”). The Company is an investment company following accounting and reporting guidance in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 946, Financial Services—Investment Companies (“ASC 946”). For each of the periods presented herein, Main Street’s consolidated financial statements include the accounts of MSCC and its consolidated subsidiaries. The Investment Portfolio, as used herein, refers to all of Main Street’s investments in LMM portfolio companies, investments in Private Loan portfolio companies, investments in Middle Market portfolio companies, Other Portfolio investments and the investment in the External Investment Manager (see Note C — Fair Value Hierarchy for Investments — Portfolio Composition — Investment Portfolio Composition
Principles of Consolidation	Principles of Consolidation Under ASC 946, Main Street is precluded from consolidating other entities in which Main Street has equity investments, including those in which it has a controlling interest, unless the other entity is another investment company. An exception to this general principle in ASC 946 occurs if Main Street holds a controlling interest in an operating company that provides all or substantially all of its services directly to Main Street. Accordingly, as noted above, MSCC’s consolidated financial statements include the financial position and operating results for the Funds, the Taxable Subsidiaries and the Structured Subsidiaries. Main Street has determined that none of its portfolio investments qualify for this exception, including the investment in the External Investment Manager. Therefore, Main Street’s Investment Portfolio is carried on the Consolidated Balance Sheets at fair value, as discussed further in Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio , with any adjustments to fair value recognized as “Net Unrealized Appreciation (Depreciation)” until the investment is realized, usually upon exit, resulting in any gain or loss being recognized as a “Net Realized Gain (Loss),” in both cases on the Consolidated Statements of Operations.
Portfolio Investment Classification and Valuation of the Investment Portfolio	Portfolio Investment Classification Main Street classifies its Investment Portfolio in accordance with the requirements of the 1940 Act. Under the 1940 Act, (a) “Control Investments” are defined as investments in which Main Street owns more than 25% of the voting securities or has rights to maintain greater than 50% of the board representation, (b) “Affiliate Investments” are defined as investments in which Main Street owns between 5% and 25% (inclusive) of the voting securities and does not have rights to maintain greater than 50% of the board representation and (c) “Non-Control/Non-Affiliate Investments” are defined as investments that are neither Control Investments nor Affiliate Investments. For purposes of determining the classification of its Investment Portfolio, Main Street has excluded consideration of any voting securities or board appointment rights held by third-party investment funds advised by the External Investment Manager. Main Street accounts for its Investment Portfolio at fair value. As a result, Main Street follows the provisions of ASC 820, Fair Value Measurements and Disclosures (“ASC 820”). ASC 820 defines fair value, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value and enhances disclosure requirements for fair value measurements. ASC 820 requires Main Street to assume that the portfolio investment is to be sold in the principal market to independent market participants, which may be a hypothetical market. Market participants are defined as buyers and sellers in the principal market that are independent, knowledgeable and willing and able to transact. Main Street’s portfolio strategy calls for it to invest primarily in illiquid debt and equity securities issued by privately held, LMM companies and debt securities issued by Middle Market companies that are generally larger in size than the LMM companies and that can be more liquid than the debt securities issued by LMM companies. Main Street categorizes some of its investments in LMM companies and Middle Market companies as Private Loan portfolio investments, which are primarily debt securities in privately held companies that have primarily been originated directly by Main Street or, to a lesser extent, through its strategic relationships with other investment funds on a collaborative basis through investments that are often referred to in the debt markets as “club deals” because of the small lender group size. In both cases, Main Street’s Private Loan investments are typically made to support a company owned by or in the process of being acquired by a private equity sponsor. Private Loan investments are made in companies that are consistent with the size of companies Main Street invests in through its LMM portfolio and Middle Market portfolio. Main Street’s portfolio also includes Other Portfolio investments which primarily consist of investments that are not consistent with the typical profiles for its LMM, Private Loan or Middle Market portfolio investments, including investments which may be managed by third parties. Main Street’s portfolio may also include short-term portfolio investments that are atypical of Main Street’s LMM, Private Loan and Middle Market portfolio investments in that they are intended to be a short-term deployment of capital and are more liquid than investments within the other portfolios. Main Street’s portfolio investments may be subject to restrictions on resale. LMM investments and Other Portfolio investments generally have no established trading market, while Private Loan investments may include investments which have no established market or have established markets that are not active. Middle Market and short-term portfolio investments generally have established markets that are not active. Main Street determines in good faith the fair value of its Investment Portfolio pursuant to a valuation policy in accordance with ASC 820, with such valuation process approved by its Board of Directors and in accordance with the 1940 Act. Main Street’s valuation policies and processes are intended to provide a consistent basis for determining the fair value of Main Street’s Investment Portfolio. For LMM portfolio investments, Main Street generally reviews external events, including private mergers, sales and acquisitions involving comparable companies, and includes these events in the valuation process by using an enterprise value waterfall methodology (“Waterfall”) for its LMM equity investments and an income approach using a yield-to-maturity model (“Yield-to-Maturity”) valuation method for its LMM debt investments. For Private Loan and Middle Market portfolio investments in debt securities for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value the investment in a current hypothetical sale using the Yield-to-Maturity valuation method. For Middle Market and short-term portfolio investments in debt securities for which it has determined that third-party quotes or other independent prices are available, Main Street primarily uses quoted prices in the valuation process. Main Street determines the appropriateness of the use of third-party broker quotes, if any, in determining fair value based on its understanding of the level of actual transactions used by the broker to develop the quote and whether the quote was an indicative price or binding offer, the depth and consistency of broker quotes and the correlation of changes in broker quotes with underlying performance of the portfolio company and other market indices. For its Other Portfolio equity investments, Main Street generally calculates the fair value of the investment primarily based on the net asset value (“NAV”) of the fund and adjusts the fair value for other factors deemed relevant that would affect the fair value of the investment. All of the valuation approaches for Main Street’s portfolio investments estimate the value of the investment as if Main Street were to sell, or exit, the investment as of the measurement date. These valuation approaches consider the value associated with Main Street’s ability to control the capital structure of the portfolio company, as well as the timing of a potential exit. For valuation purposes, “control” portfolio investments are composed of debt and equity securities in companies for which Main Street has a controlling interest in the equity ownership of the portfolio company or the ability to nominate a majority of the portfolio company’s board of directors. For valuation purposes, “non-control” portfolio investments are generally composed of debt and equity securities in companies for which Main Street does not have a controlling interest in the equity ownership of the portfolio company or the ability to nominate a majority of the portfolio company’s board of directors. Under the Waterfall valuation method, Main Street estimates the enterprise value of a portfolio company using a combination of market and income approaches or other appropriate valuation methods, such as considering recent transactions in the equity securities of the portfolio company or third-party valuations of the portfolio company, and then performs a Waterfall calculation by allocating the enterprise value over the portfolio company’s securities in order of their preference relative to one another. The enterprise value is the fair value at which an enterprise could be sold in a transaction between two willing parties, other than through a forced or liquidation sale. Typically, privately held companies are bought and sold based on multiples of earnings before interest, taxes, depreciation and amortization (“EBITDA”), cash flows, net income, revenues, or in limited cases, book value. There is no single methodology for estimating enterprise value. For any one portfolio company, enterprise value is generally described as a range of values from which a single estimate of enterprise value is derived. In estimating the enterprise value of a portfolio company, Main Street analyzes various factors including the portfolio company’s historical and projected financial results. Due to SEC deadlines for Main Street’s quarterly and annual financial reporting, the operating results of a portfolio company used in the current period valuation are generally the results from the period ended three months prior to such valuation date and may include unaudited, projected, budgeted or pro forma financial information and may require adjustments for non-recurring items or to normalize the operating results that may require significant judgment in determining. In addition, projecting future financial results requires significant judgment regarding future growth assumptions. In evaluating the operating results, Main Street also analyzes the impact of exposure to litigation, loss of customers or other contingencies. After determining the appropriate enterprise value, Main Street allocates the enterprise value to investments in order of the legal priority of the various components of the portfolio company’s capital structure. In applying the Waterfall valuation method, Main Street assumes the loans are paid-off at the principal amount in a change in control transaction and are not assumed by the buyer, which Main Street believes is consistent with its past transaction history and standard industry practices. Under the Yield-to-Maturity valuation method, Main Street also uses the income approach to determine the fair value of debt securities based on projections of the discounted future free cash flows that the debt security will likely generate, including analyzing the discounted cash flows of interest and principal amounts for the debt security, as set forth in the associated loan agreements, as well as the financial position and credit risk of the portfolio company. Main Street’s estimate of the expected repayment date of its debt securities is generally the maturity date of the instrument, as Main Street generally intends to hold its loans and debt securities to maturity. The Yield-to-Maturity analysis also considers changes in leverage levels, credit quality, portfolio company performance, changes in market-based interest rates and other factors. Main Street will generally use the value determined by the Yield-to-Maturity analysis as the fair value for that security; however, because of Main Street’s general intent to hold its loans to maturity, the fair value will not exceed the principal amount of the debt security valued using the Yield-to-Maturity valuation method. A change in the assumptions that Main Street uses to estimate the fair value of its debt securities using the Yield-to-Maturity valuation method could have a material impact on the determination of fair value. If there is deterioration in credit quality or if a debt security is in workout status, Main Street may consider other factors in determining the fair value of the debt security, including the value attributable to the debt security from the enterprise value of the portfolio company or the proceeds that would most likely be received in a liquidation analysis. Under the NAV valuation method, for an investment in an investment fund that does not have a readily determinable fair value, Main Street measures the fair value of the investment predominately based on the NAV of the investment fund as of the measurement date and adjusts the investment’s fair value for factors known to Main Street that would affect that fund’s NAV, including, but not limited to, fair values for individual investments held by the fund if Main Street holds the same investment or for a publicly traded investment. In addition, in determining the fair value of the investment, Main Street considers whether adjustments to the NAV are necessary in certain circumstances, based on the analysis of any restrictions on redemption of Main Street’s investment as of the measurement date, recent actual sales or redemptions of interests in the investment fund, and expected future cash flows available to equity holders, including the rate of return on those cash flows compared to an implied market return on equity required by market participants, or other uncertainties surrounding Main Street’s ability to realize the full NAV of its interests in the investment fund. Pursuant to its internal valuation process and the requirements under the 1940 Act, Main Street performs valuation procedures on each of its portfolio investments quarterly. In addition to its internal valuation process, in arriving at estimates of fair value for its investments in its LMM portfolio companies, Main Street, among other things, consults with a nationally recognized independent financial advisory services firm (the “Financial Advisory Firm”). The Financial Advisory Firm analyzes and provides observations, recommendations and an assurance certification regarding the Company’s determinations of the fair value of its LMM portfolio company investments. The Financial Advisory Firm is generally consulted relative to Main Street’s investments in each LMM portfolio company at least once every calendar year, and for Main Street’s investments in new LMM portfolio companies, at least once in the twelve-month period subsequent to the initial investment. In certain instances, Main Street may determine that it is not cost-effective, and as a result is not in its stockholders’ best interest, to consult with the Financial Advisory Firm on its investments in one or more LMM portfolio companies. Such instances include, but are not limited to, situations where the fair value of Main Street’s investment in a LMM portfolio company is determined to be insignificant relative to the total Investment Portfolio. Main Street consulted with and received an assurance certification from the Financial Advisory Firm in arriving at Main Street’s determination of fair value on its investments in a total of 37 LMM portfolio companies for the six months ended June 30, 2023, representing 52% of the total LMM portfolio at fair value as of June 30, 2023, and on a total of 36 LMM portfolio companies for the six months ended June 30, 2022, representing 54% of the total LMM portfolio at fair value as of June 30, 2022. Excluding its investments in LMM portfolio companies that, as of June 30, 2023 and 2022, as applicable, had not been in the Investment Portfolio for at least twelve months subsequent to the initial investment or whose primary purpose is to own real estate for which a third-party appraisal is obtained on at least an annual basis, the percentage of the LMM portfolio reviewed and certified by the Financial Advisory Firm for the six months ended June 30, 2023 and 2022 was 55% and 61% of the total LMM portfolio at fair value, respectively. For valuation purposes, all of Main Street’s Private Loan portfolio investments are non-control investments. For Private Loan portfolio investments for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value such Private Loan debt investments in a current hypothetical sale using the Yield-to-Maturity valuation method and such Private Loan equity investments in a current hypothetical sale using the Waterfall valuation method. In addition to its internal valuation process, in arriving at estimates of fair value for its investments in its Private Loan portfolio companies, Main Street, among other things, consults with the Financial Advisory Firm. The Financial Advisory Firm analyzes and provides observations and recommendations and an assurance certification regarding Main Street’s determinations of the fair value of its Private Loan portfolio company investments. The Financial Advisory Firm is generally consulted relative to Main Street’s investments in each Private Loan portfolio company at least once every calendar year, and for Main Street’s investments in new Private Loan portfolio companies, at least once in the twelve-month period subsequent to the initial investment. In certain instances, Main Street may determine that it is not cost-effective, and as a result is not in its stockholders’ best interest, to consult with the Financial Advisory Firm on its investments in one or more Private Loan portfolio companies. Such instances include, but are not limited to, situations where the fair value of Main Street’s investment in a Private Loan portfolio company is determined to be insignificant relative to the total Investment Portfolio. Main Street consulted with and received an assurance certification from the Financial Advisory Firm in arriving at its determination of fair value on its investments in a total of 33 Private Loan portfolio companies for the six months ended June 30, 2023, representing 49% of the total Private Loan portfolio at fair value as of June 30, 2023, and on a total of 29 Private Loan portfolio companies for the six months ended June 30, 2022, representing 44% of the total Private Loan portfolio at fair value as of June 30, 2022. Excluding its investments in Private Loan portfolio companies that, as of June 30, 2023 and 2022, as applicable, had not been in the Investment Portfolio for at least twelve months subsequent to the initial investment and its investments in Private Loan portfolio companies that were not reviewed because the investment is valued based upon third-party quotes or other independent pricing, the percentage of the Private Loan portfolio reviewed and certified by the Financial Advisory Firm for the six months ended June 30, 2023 and 2022 was 53% and 67% of the total Private Loan portfolio at fair value, respectively. For valuation purposes, all of Main Street’s Middle Market portfolio investments are non-control investments. To the extent sufficient observable inputs are available to determine fair value, Main Street uses observable inputs to determine the fair value of these investments through obtaining third-party quotes or other independent pricing. For Middle Market portfolio investments for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value such Middle Market debt investments in a current hypothetical sale using the Yield-to-Maturity valuation method and such Middle Market equity investments in a current hypothetical sale using the Waterfall valuation method. Main Street generally consults on a limited basis with the Financial Advisory Firm in connection with determining the fair value of its Middle Market portfolio investments due to the nature of these investments. The vast majority (90% and 89% as of June 30, 2023 and December 31, 2022, respectively) of the Middle Market portfolio investments (i) are valued using third-party quotes or other independent pricing services, (ii) Main Street has consulted with and received an assurance certification from the Financial Advisory Firm within the last twelve months or (iii) are new investments that have not been in the Investment Portfolio for at least twelve months subsequent to the initial investment. For valuation purposes, all of Main Street’s short-term portfolio investments are non-control investments. To the extent sufficient observable inputs are available to determine fair value, Main Street uses observable inputs to determine the fair value of these investments through obtaining third-party quotes or other independent pricing. Because all of the short-term portfolio investments are typically valued using third-party quotes or other independent pricing services, Main Street generally does not consult with any financial advisory services firms in connection with determining the fair value of its short-term portfolio investments. For valuation purposes, all of Main Street’s Other Portfolio investments are non-control investments. Main Street’s Other Portfolio investments comprised 2.6% and 2.8% of Main Street’s Investment Portfolio at fair value as of June 30, 2023 and December 31, 2022, respectively. Similar to the LMM investment portfolio, market quotations for Other Portfolio equity investments are generally not readily available. For its Other Portfolio equity investments, Main Street generally determines the fair value of these investments using the NAV valuation method. For valuation purposes, Main Street’s investment in the External Investment Manager is a control investment. Market quotations are not readily available for this investment, and as a result, Main Street determines the fair value of the External Investment Manager using the Waterfall valuation method under the market approach. In estimating the enterprise value, Main Street analyzes various factors, including the entity’s historical and projected financial results, as well as its size, marketability and performance relative to the population of market comparables. This valuation approach estimates the value of the investment as if Main Street were to sell, or exit, the investment. In addition, Main Street considers its ability to control the capital structure of the company, as well as the timing of a potential exit, in connection with determining the fair value of the External Investment Manager. Main Street consults with and receives an assurance certification from the Financial Advisory Firm in arriving at its determination of fair value for its investment in the External Investment Adviser on a quarterly basis. Due to the inherent uncertainty in the valuation process, Main Street’s determination of fair value for its Investment Portfolio may differ materially from the values that would have been determined had a ready market for the securities existed. In addition, changes in the market environment, portfolio company performance and other events that may occur over the lives of the investments may cause the gains or losses ultimately realized on these investments to be materially different than the valuations currently assigned. Main Street determines the fair value of each individual investment and records changes in fair value as unrealized appreciation or depreciation. Main Street uses an internally developed portfolio investment rating system in connection with its investment oversight, portfolio management and analysis and investment valuation procedures for its LMM, Private Loan and Middle Market portfolio companies. This system takes into account both quantitative and qualitative factors of each LMM, Private Loan and Middle Market portfolio company. In December 2020, the SEC adopted Rule 2a-5 under the 1940 Act, which permits a BDC’s board of directors to designate its executive officers or investment adviser as a valuation designee to determine the fair value for its investment portfolio, subject to the active oversight of the board. Main Street’s Board of Directors has approved policies and procedures pursuant to Rule 2a-5 (the “Valuation Procedures”) and has designated a group of its executive officers to serve as the Board of Directors’ valuation designee. Main Street believes its Investment Portfolio as of June 30, 2023 and December 31, 2022 approximates fair value as of those dates based on the markets in which it operates and other conditions in existence on those reporting dates.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. Actual results may differ from these estimates under different conditions or assumptions. Additionally, as explained in Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio , the consolidated financial statements include investments in the Investment Portfolio whose values have been estimated by Main Street, pursuant to valuation policies and procedures approved and overseen by Main Street’s Board of Directors, in the absence of readily ascertainable market values. Because of the inherent uncertainty of the Investment Portfolio valuations, those estimated values may differ materially from the values that would have been determined had a ready market for the securities existed. Macroeconomic factors, including pandemics, risk of recession, inflation, supply chain constraints or disruptions, geopolitical disruptions and rising market index interest rates, and the related effect on the U.S. and global economies, have impacted, and may continue to impact, the businesses and operating results of certain of Main Street’s portfolio companies. As a result of these and other current effects of macroeconomic factors, as well as the uncertainty regarding the extent and duration of their impact, the valuation of Main Street’s Investment Portfolio has and may continue to experience increased volatility.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents consist of cash and highly liquid investments with an original maturity of three months or less at the date of purchase. Cash and cash equivalents are carried at cost, which approximates fair value. At June 30, 2023 and December 31, 2022, cash balances totaling $46.0 million (excluding amounts invested in AAA rated money market funds) and $46.3 million, respectively, exceeded Federal Deposit Insurance Corporation insurance protection levels, subjecting the Company to risk related to the uninsured balance. All of the Company’s cash deposits are held at large established high credit quality financial institutions, and management believes that the risk of loss associated with any uninsured balances is remote.
Interest	Interest, Dividend and Fee IncomeMain Street records interest and dividend income on the accrual basis to the extent amounts are expected to be collected. Dividend income is recorded when dividends are declared by the portfolio company or at such other time that an obligation exists for the portfolio company to make a distribution. Main Street evaluates accrued interest and dividend income periodically for collectability. When a loan or debt security becomes 90 days or more past due, and if Main Street otherwise does not expect the debtor to be able to service its debt obligation, Main Street will generally place the loan or debt security on non-accrual status and cease recognizing interest income on that loan or debt security until the borrower has demonstrated the ability and intent to pay contractual amounts due. If a loan or debt security’s status significantly improves regarding the debtor’s ability to service the debt obligation, or if a loan or debt security is sold or written off, Main Street removes it from non-accrual status.
Dividend	Interest, Dividend and Fee IncomeMain Street records interest and dividend income on the accrual basis to the extent amounts are expected to be collected. Dividend income is recorded when dividends are declared by the portfolio company or at such other time that an obligation exists for the portfolio company to make a distribution. Main Street evaluates accrued interest and dividend income periodically for collectability. When a loan or debt security becomes 90 days or more past due, and if Main Street otherwise does not expect the debtor to be able to service its debt obligation, Main Street will generally place the loan or debt security on non-accrual status and cease recognizing interest income on that loan or debt security until the borrower has demonstrated the ability and intent to pay contractual amounts due. If a loan or debt security’s status significantly improves regarding the debtor’s ability to service the debt obligation, or if a loan or debt security is sold or written off, Main Street removes it from non-accrual status. Main Street holds certain debt and preferred equity instruments in its Investment Portfolio that contain payment-in-kind (“PIK”) interest and cumulative dividend provisions. The PIK interest, computed at the contractual rate specified in each debt agreement, is periodically added to the principal balance of the debt and is recorded as interest income. Thus, the actual collection of this interest may be deferred until the time of debt principal repayment. Cumulative dividends are recorded as dividend income, and any dividends in arrears are added to the balance of the preferred equity investment. The actual collection of these dividends in arrears may be deferred until such time as the preferred equity is redeemed or sold. To maintain RIC tax treatment (as discussed in Note B.9. — Summary of Significant Accounting Policies — Income Taxes below), these non-cash sources of income may need to be paid out to stockholders in the form of distributions, even though
Fee Income	Main Street may periodically provide services, including structuring and advisory services, to its portfolio companies or other third parties. For services that are separately identifiable and evidence exists to substantiate fair value, fee income is recognized as earned, which is generally when the investment or other applicable transaction closes. Fees received in connection with debt financing transactions for services that do not meet these criteria are treated as debt origination fees and are generally deferred and accreted into income over the life of the financing.
Deferred Financing Costs	Deferred Financing Costs Deferred financing costs include commitment fees and other direct costs related to Main Street’s multi-year revolving credit facility (the “Corporate Facility”) and special purpose vehicle revolving credit facility (the “SPV Facility” and, together with the Corporate Facility, the “Credit Facilities”) and its unsecured notes, as well as the commitment fees and leverage fees (3.4% of the total commitment and draw amounts, as applicable) on the SBIC debentures. See further discussion of Main Street’s debt in Note E — Debt . Deferred financing costs in connection with the Credit Facilities are capitalized as an asset. Deferred financing costs in connection with all other debt arrangements are a direct deduction from the principal amount outstanding.
Equity Offering Costs	Equity Offering CostsThe Company’s offering costs are charged against the proceeds from equity offerings when the proceeds are received.
Unearned Income—Debt Origination Fees and Original Issue Discount and Discounts / Premiums to Par Value	Unearned Income—Debt Origination Fees and Original Issue Discount and Discounts / Premiums to Par Value Main Street capitalizes debt origination fees received in connection with financings and reflects such fees as unearned income netted against the applicable debt investments. The unearned income from the fees is accreted into income over the life of the financing. In connection with its portfolio debt investments, Main Street sometimes receives nominal cost warrants or warrants with an exercise price below the fair value of the underlying equity (together, “nominal cost equity”) that are valued as part of the negotiation process with the particular portfolio company. When Main Street receives nominal cost equity, it allocates its cost basis in its investment between its debt security and its nominal cost equity at the time of origination based on amounts negotiated with the particular portfolio company. The allocated amounts are based upon the fair value of the nominal cost equity, which is then used to determine the allocation of cost to the debt security. Any discount recorded on a debt investment resulting from this allocation is reflected as unearned income, which is netted against the applicable debt investment, and accreted into interest income over the life of the debt investment. The actual collection of this interest is deferred until the time of debt principal repayment. Main Street may also purchase debt securities at a discount or at a premium to the par value of the debt security. In the case of a purchase at a discount, Main Street records the investment at the par value of the debt security net of the discount, and the discount is accreted into interest income over the life of the debt investment. In the case of a purchase at a premium, Main Street records the investment at the par value of the debt security plus the premium, and the premium is amortized as a reduction to interest income over the life of the debt investment.
Share-Based Compensation	Share-Based Compensation Main Street accounts for its share-based compensation plans using the fair value method, as prescribed by ASC 718, Compensation—Stock Compensation. Accordingly, for restricted stock awards, Main Street measures the grant date fair value based upon the market price of its common stock on the date of the grant and amortizes the fair value of the awards as share-based compensation expense over the requisite service period, which is generally the vesting term. Main Street recognizes all excess tax benefits and tax deficiencies (including tax benefits of dividends on share-based payment awards) as income tax expense or benefit in the income statement and does not delay recognition of a tax benefit until the tax benefit is realized through a reduction to taxes payable. As such, the tax effects of exercised or vested awards are treated as discrete items in the reporting period in which they occur. Additionally, Main Street has elected to account for forfeitures as they occur.
Income Taxes	Income Taxes MSCC has elected to be treated for U.S. federal income tax purposes as a RIC. MSCC’s taxable income includes the taxable income generated by MSCC and certain of its subsidiaries, including the Funds and Structured Subsidiaries, which are treated as disregarded entities for tax purposes. As a RIC, MSCC generally will not pay corporate-level U.S. federal income taxes on any net ordinary taxable income or capital gains that MSCC distributes to its stockholders. MSCC must generally distribute at least 90% of its “investment company taxable income” (which is generally its net ordinary taxable income and realized net short-term capital gains in excess of realized net long-term capital losses) and 90% of its tax-exempt income to maintain its RIC status (pass-through tax treatment for amounts distributed). As part of maintaining RIC status, undistributed taxable income (subject to a 4% non-deductible U.S. federal excise tax) pertaining to a given fiscal year may be distributed up to twelve months subsequent to the end of that fiscal year, provided such dividends are declared on or prior to the later of (i) the filing of the U.S. federal income tax return for the applicable fiscal year or (ii) the fifteenth day of the ninth month following the close of the year in which such taxable income was generated. The Taxable Subsidiaries primarily hold certain equity investments for Main Street. The Taxable Subsidiaries permit Main Street to hold equity investments in portfolio companies which are “pass-through” entities for tax purposes and to continue to comply with the “source-of-income” requirements contained in the RIC tax provisions of the Code. The Taxable Subsidiaries are consolidated with Main Street for U.S. GAAP financial reporting purposes, and the portfolio investments held by the Taxable Subsidiaries are included in Main Street’s consolidated financial statements as portfolio investments and recorded at fair value. The Taxable Subsidiaries are not consolidated with MSCC for income tax purposes and may generate income tax expense, or benefit, and tax assets and liabilities, as a result of their ownership of certain portfolio investments. The taxable income, or loss, of the Taxable Subsidiaries may differ from their book income, or loss, due to temporary book and tax timing differences and permanent differences. The Taxable Subsidiaries are each taxed at corporate income tax rates based on their taxable income. The income tax expense, or benefit, if any, and the related tax assets and liabilities, of the Taxable Subsidiaries are reflected in Main Street’s consolidated financial statements. The External Investment Manager is an indirect wholly-owned subsidiary of MSCC owned through a Taxable Subsidiary and is a disregarded entity for tax purposes. The External Investment Manager has entered into a tax sharing agreement with its Taxable Subsidiary owner. Since the External Investment Manager is accounted for as a portfolio investment of MSCC and is not included as a consolidated subsidiary of MSCC in MSCC’s consolidated financial statements, and as a result of the tax sharing agreement with its Taxable Subsidiary owner, for its stand-alone financial reporting purposes the External Investment Manager is treated as if it is taxed at corporate income tax rates based on its taxable income and, as a result of its activities, may generate income tax expense or benefit. The income tax expense, or benefit, if any, and the related tax assets and liabilities, of the External Investment Manager are reflected in the External Investment Manager’s separate financial statements. The Taxable Subsidiaries and the External Investment Manager use the liability method in accounting for income taxes. Deferred tax assets and liabilities are recorded for temporary differences between the tax basis of assets and liabilities and their reported amounts in the consolidated financial statements, using statutory tax rates in effect for the year in which the temporary differences are expected to reverse. A valuation allowance is provided, if necessary, against deferred tax assets when it is more likely than not that some portion or all of the deferred tax asset will not be realized. Main Street’s net assets as included on the Consolidated Balance Sheets and Consolidated Statements of Changes in Net Assets include an adjustment to classification as a result of permanent book-to-tax differences, which include differences in the book and tax treatment of income and expenses. Taxable income generally differs from net income for financial reporting purposes due to temporary and permanent differences in the recognition of income and expenses. Taxable income generally excludes net unrealized appreciation or depreciation, as investment gains or losses are not included in taxable income until they are realized.
Net Realized Gains or Losses and Net Unrealized Appreciation or Depreciation	Net Realized Gains or Losses and Net Unrealized Appreciation or DepreciationRealized gains or losses are measured by the difference between the net proceeds from the sale or redemption of an investment or a financial instrument and the cost basis of the investment or financial instrument, without regard to unrealized appreciation or depreciation previously recognized, and includes investments written-off during the period net of recoveries and realized gains or losses from in-kind redemptions. Net unrealized appreciation or depreciation reflects the net change in the fair value of the Investment Portfolio and financial instruments and the reclassification of any prior period unrealized appreciation or depreciation on exited investments and financial instruments to realized gains or losses.
Fair Value of Financial Instruments	Fair Value of Financial Instruments Fair value estimates are made at discrete points in time based on relevant information. These estimates may be subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Main Street believes that the carrying amounts of its financial instruments, consisting of cash and cash equivalents, receivables, payables and other liabilities approximate the fair values of such items due to the short-term nature of these instruments. To estimate the fair value of Main Street’s multiple tranches of unsecured debt instruments as disclosed in Note E — Debt , Main Street uses quoted market prices. For the estimated fair value of Main Street’s SBIC debentures, Main Street uses the Yield-to-Maturity valuation method based on projections of the discounted future free cash flows that the debt security will likely generate, including both the discounted cash flows of the associated interest and principal amounts for the debt security.
Earnings per Share	Earnings per Share Basic and diluted per share calculations are computed utilizing the weighted-average number of shares of common stock outstanding for the period. In accordance with ASC 260, Earnings Per Share , the unvested shares of restricted stock awarded pursuant to Main Street’s equity compensation plans are participating securities and, therefore, are included in the basic earnings per share calculation. As a result, for all periods presented, there is no difference between diluted earnings per share and basic earnings per share amounts.
Recently Issued or Adopted Accounting Standards	Recently Issued or Adopted Accounting Standards In March 2020, the FASB issued ASU 2020-04, Reference rate reform (Topic 848) — Facilitation of the effects of reference rate reform on financial reporting . The amendments in this update provide optional expedients and exceptions for applying U.S. GAAP to certain contracts and hedging relationships that reference LIBOR or another reference rate expected to be discontinued due to reference rate reform and became effective upon issuance for all entities. The Company has agreements that have LIBOR as a reference rate with certain portfolio companies and also with certain lenders. Many of these agreements include language for choosing an alternative successor rate if LIBOR reference is no longer considered to be appropriate. Contract modifications are required to be evaluated in determining whether the modifications result in the establishment of new contracts or the continuation of existing contracts. The Company adopted this amendment in March 2020 and plans to apply the amendments in this update to account for contract modifications due to changes in reference rates when LIBOR reference is no longer used. In November 2022, the FASB issued ASU 2022-06, Reference rate reform (Topic 848) — Deferral of the Sunset Date of Topic 848 , which deferred the sunset date of Topic 848 from December 31, 2022 to December 31, 2024 after which entities will no longer be permitted to apply the relief in Topic 848. The Company utilized the optional expedients and exceptions provided by ASU 2020-04 and extended by ASU 2022-06 during the six months ended June 30, 2023 and the year ended December 31, 2022, the effect of which was not material to the consolidated financial statements and the notes thereto. The Company will continue to utilize the optional expedients provided by ASU 2020-04 and extended by ASU 2022-06 through December 31, 2024. The Company does not expect ASU 2022-06 to have a material impact to the consolidated financial statements and the notes thereto. In June 2022, the FASB issued ASU 2022-03, Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions. The amendments in this update provide that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and, therefore, is not considered in measuring fair value. The amendments in this update also require additional disclosures for equity securities subject to contractual sales restrictions. ASU 2022-03 is effective for years beginning after December 15, 2023, though early adoption is permitted. The Company elected to early adopt ASU 2022-03 as of December 31, 2022 and it did not have a material impact on the consolidated financial statements and the notes thereto. From time to time, new accounting pronouncements are issued by the FASB or other standards-setting bodies that are adopted by the Company as of the specified effective date. The Company believes that the impact of recently issued standards and any that are not yet effective will not have a material impact on its consolidated financial statements upon adoption.
Fair Value Measurement	ASC 820 defines fair value, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value, and enhances disclosure requirements for fair value measurements. Main Street accounts for its investments at fair value. Fair Value Hierarchy In accordance with ASC 820, Main Street has categorized its investments based on the priority of the inputs to the valuation technique into a three-level fair value hierarchy. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical investments (Level 1) and the lowest priority to unobservable inputs (Level 3). Investments recorded on Main Street’s Consolidated Balance Sheets are categorized based on the inputs to the valuation techniques as follows: Level 1—Investments whose values are based on unadjusted quoted prices for identical assets in an active market that Main Street has the ability to access (examples include investments in active exchange-traded equity securities and investments in most U.S. government and agency securities). Level 2—Investments whose values are based on quoted prices in markets that are not active or model inputs that are observable either directly or indirectly for substantially the full term of the investment. Level 2 inputs include the following: • Quoted prices for similar assets in active markets (for example, investments in restricted stock); • Quoted prices for identical or similar assets in non-active markets (for example, investments in thinly traded public companies); • Pricing models whose inputs are observable for substantially the full term of the investment (for example, market interest rate indices); and • Pricing models whose inputs are derived principally from, or corroborated by, observable market data through correlation or other means for substantially the full term of the investment. Level 3—Investments whose values are based on prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement (for example, investments in illiquid securities issued by privately held companies). These inputs reflect management’s own assumptions about the assumptions a market participant would use in pricing the investment. As required by ASC 820, when the inputs used to measure fair value fall within different levels of the hierarchy, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement in its entirety. For example, a Level 3 fair value measurement may include inputs that are observable (Levels 1 and 2) and unobservable (Level 3). Therefore, unrealized appreciation and depreciation related to such investments categorized within the Level 3 tables below may include changes in fair value that are attributable to both observable inputs (Levels 1 and 2) and unobservable inputs (Level 3). As of June 30, 2023 and December 31, 2022, all of Main Street’s LMM portfolio investments consisted of illiquid securities issued by privately held companies and the fair value determination for these investments primarily consisted of unobservable inputs. As a result, all of Main Street’s LMM portfolio investments were categorized as Level 3 as of June 30, 2023 and December 31, 2022. As of June 30, 2023 and December 31, 2022, Main Street’s Private Loan portfolio investments primarily consisted of investments in interest-bearing secured debt investments. The fair value determination for these investments consisted of a combination of observable inputs in non-active markets for which sufficient observable inputs were not available to determine the fair value of these investments and unobservable inputs. As a result, all of Main Street’s Private Loan portfolio investments were categorized as Level 3 as of June 30, 2023 and December 31, 2022. As of June 30, 2023 and December 31, 2022, Main Street’s Middle Market portfolio investments consisted primarily of investments in secured and unsecured debt investments and independently rated debt investments. The fair value determination for these investments consisted of a combination of observable inputs in non-active markets for which sufficient observable inputs were not available to determine the fair value of these investments and unobservable inputs. As a result, all of Main Street’s Middle Market portfolio investments were categorized as Level 3 as of June 30, 2023 and December 31, 2022. As of June 30, 2023 and December 31, 2022, Main Street’s Other Portfolio investments consisted of illiquid securities issued by privately held entities and the fair value determination for these investments primarily consisted of unobservable inputs. As a result, all of Main Street’s Other Portfolio investments were categorized as Level 3 as of June 30, 2023 and December 31, 2022. As of December 31, 2022, Main Street held one short-term portfolio investment, which was a secured debt investment. The fair value determination for this investment consisted of available observable inputs in non-active markets sufficient to determine the fair value of the investment. As a result, Main Street’s short-term portfolio investment was categorized as Level 2 as of December 31, 2022. The fair value determination of each portfolio investment categorized as Level 3 required one or more of the following unobservable inputs: • Financial information obtained from each portfolio company, including unaudited statements of operations and balance sheets for the most recent period available as compared to budgeted numbers; • Current and projected financial condition of the portfolio company; • Current and projected ability of the portfolio company to service its debt obligations; • Type and amount of collateral, if any, underlying the investment; • Current financial ratios (e.g., fixed charge coverage ratio, interest coverage ratio and net debt/EBITDA ratio) applicable to the investment; • Current liquidity of the investment and related financial ratios (e.g., current ratio and quick ratio); • Pending debt or capital restructuring of the portfolio company; • Projected operating results of the portfolio company; • Current information regarding any offers to purchase the investment; • Current ability of the portfolio company to raise any additional financing as needed; • Changes in the economic environment which may have a material impact on the operating results of the portfolio company; • Internal occurrences that may have an impact (both positive and negative) on the operating performance of the portfolio company; • Qualitative assessment of key management; • Contractual rights, obligations or restrictions associated with the investment; and • Other factors deemed relevant. The use of significant unobservable inputs creates uncertainty in the measurement of fair value as of the reporting date. The significant unobservable inputs used in the fair value measurement of Main Street’s LMM equity securities, which are generally valued through an average of the discounted cash flow technique and the market comparable/enterprise value technique (unless one of these approaches is determined to not be appropriate), are (i) EBITDA multiples and (ii) the weighted-average cost of capital (“WACC”). Significant increases (decreases) in EBITDA multiple inputs in isolation would result in a significantly higher (lower) fair value measurement. On the contrary, significant increases (decreases) in WACC inputs in isolation would result in a significantly lower (higher) fair value measurement. The significant unobservable inputs used in the fair value measurement of Main Street’s LMM, Private Loan and Middle Market securities are (i) risk adjusted discount rates used in the Yield-to-Maturity valuation technique (see Note B.1. — Summary of

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	6 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	Jun. 30, 2023
Accounting Policies [Abstract]
Schedule of Investment Income	A presentation of total investment income Main Street received from its Investment Portfolio in each of the periods presented is as follows: Three Months Ended Six Months Ended 2023 2022 2023 2022 (dollars in thousands) Interest, fee and dividend income: Interest income $ 97,273 $ 63,984 $ 190,666 $ 123,426 Dividend income 25,599 17,913 49,821 34,535 Fee income 4,711 3,303 7,351 6,635 Total interest, fee and dividend income $ 127,583 $ 85,200 $ 247,838 $ 164,596

FAIR VALUE HIERARCHY FOR INVE_2

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION (Tables)	6 Months Ended
	Jun. 30, 2023
Fair Value Disclosures [Abstract]
Schedule of Fair Value Measurement Inputs and Valuation Techniques	The following tables provide a summary of the significant unobservable inputs used to fair value Main Street’s Level 3 portfolio investments as of June 30, 2023 and December 31, 2022: Type of Fair Value as of June 30, 2023 (in thousands) Valuation Technique Significant Unobservable Inputs Range(3) Weighted Average(3) Median(3) Equity investments $ 1,279,510 Discounted cash flow WACC 9.2% - 22.3% 14.4 % 15.1 % Market comparable / Enterprise value EBITDA multiple (1) 4.5x - 8.4x (2) 6.7x 6.1x Debt investments $ 2,718,508 Discounted cash flow Risk adjusted discount factor 6.1% - 16.8% (2) 10.4 % 11.0 % Expected principal recovery percentage 0.0% - 100.0% 99.7 % 100.0 % Debt investments $ 212,525 Market approach Third-party quote 4.0 - 97.5 88.4 94.0 Total Level 3 investments $ 4,210,543 ____________________ (1) EBITDA may include proforma adjustments and/or other addbacks based on specific circumstances related to each investment. (2) Range excludes outliers that are greater than one standard deviation from the mean. Including these outliers, the range for EBITDA multiple is 2.0x - 15.7x and the range for risk adjusted discount factor is 3.8% - 33.5%. (3) Does not include investments for which the valuation technique does not include the use of the applicable fair value input. Type of Investment Fair Value as of December 31, 2022 (in thousands) Valuation Technique Significant Unobservable Inputs Range(3) Weighted Average(3) Median(3) Equity investments $ 1,172,077 Discounted cash flow WACC 9.4% - 22.5% 14.5 % 15.4 % Market comparable / Enterprise value EBITDA multiple (1) 4.3x - 8.3x (2) 6.7x 6.0x Debt investments $ 2,663,958 Discounted cash flow Risk adjusted discount factor 5.7% - 15.7% (2) 10.0 % 10.3 % Expected principal recovery percentage 0.0% - 100.0% 99.4 % 100.0 % Debt investments $ 264,238 Market approach Third-party quote 5.6 - 98.5 87.0 91.4 Total Level 3 investments $ 4,100,273 ____________________ (1) EBITDA may include proforma adjustments and/or other addbacks based on specific circumstances related to each investment. (2) Range excludes outliers that are greater than one standard deviation from the mean. Including these outliers, the range for EBITDA multiple is 2.0x - 15.7x and the range for risk adjusted discount factor is 3.8% - 43.3%. (3) Does not include investments for which the valuation technique does not include the use of the applicable fair value input.
Schedule of Changes in Fair Value of Main Street’s Level 3 Portfolio Investments	The following tables provide a summary of changes in fair value of Main Street’s Level 3 portfolio investments for the six-month periods ended June 30, 2023 and 2022 (amounts in thousands): Type of Investment Fair Value as of December 31, 2022 Transfers Into Level 3 Hierarchy Redemptions/ Repayments New Investments Net Changes from Unrealized to Realized Net Unrealized Appreciation (Depreciation) Other(1) Fair Value as of June 30, 2023 Debt $ 2,928,196 $ — $ (421,050) $ 376,859 $ 100,164 $ (23,390) $ (29,746) $ 2,931,033 Equity 1,166,643 — (35,199) 48,210 4,126 56,358 32,322 1,272,460 Equity Warrant 5,434 — — 2,091 — 2,101 (2,576) 7,050 $ 4,100,273 $ — $ (456,249) $ 427,160 $ 104,290 $ 35,069 $ — $ 4,210,543 ____________________ (1) Includes the impact of non-cash conversions. These transactions represent non-cash investing activities. See additional cash flow information in the Consolidated Statements of Cash Flows. Type of Investment Fair Value as of December 31, 2021 Transfers Into Level 3 Hierarchy Redemptions/ Repayments New Investments Net Changes from Unrealized to Realized Net Unrealized Appreciation (Depreciation) Other(1) Fair Value as of June 30, 2022 Debt $ 2,509,568 $ — $ (351,315) $ 508,045 $ 3,656 $ (60,605) $ (1,333) $ 2,608,016 Equity 1,043,709 — (27,338) 34,765 (1,977) 51,451 1,333 1,101,943 Equity Warrant 6,560 — — — — (610) — 5,950 $ 3,559,837 $ — $ (378,653) $ 542,810 $ 1,679 $ (9,764) $ — $ 3,715,909 ____________________ (1) Includes the impact of non-cash conversions. These transactions represent non-cash investing activities. See additional cash flow information in the Consolidated Statements of Cash Flows.
Schedule of Portfolio Investments by Level in the Fair Value Hierarchy	At June 30, 2023 and December 31, 2022, Main Street’s investments at fair value were categorized as follows in the fair value hierarchy for ASC 820 purposes: Fair Value Measurements (in thousands) At June 30, 2023 Fair Value Quoted Prices in Significant Other Significant LMM portfolio investments $ 2,170,226 $ — $ — $ 2,170,226 Private Loan portfolio investments 1,499,309 — — 1,499,309 Middle Market portfolio investments 295,854 — — 295,854 Other Portfolio investments 111,184 — — 111,184 External Investment Manager 133,970 — — 133,970 Total investments $ 4,210,543 $ — $ — $ 4,210,543 Fair Value Measurements (in thousands) At December 31, 2022 Fair Value Quoted Prices in Significant Other Significant LMM portfolio investments $ 2,060,459 $ — $ — $ 2,060,459 Private Loan portfolio investments 1,471,466 — — 1,471,466 Middle Market portfolio investments 329,119 — — 329,119 Other Portfolio investments 116,299 — — 116,299 External Investment Manager 122,930 — — 122,930 Short-term portfolio investments 1,904 — 1,904 — Total investments $ 4,102,177 $ — $ 1,904 $ 4,100,273
Schedule of Investment Holdings	The following tables provide a summary of Main Street’s investments in the LMM, Private Loan and Middle Market portfolios as of June 30, 2023 and December 31, 2022 (this information excludes Other Portfolio investments, short-term portfolio investments and the External Investment Manager, which are discussed further below). As of June 30, 2023 LMM (a) Private Loan Middle Market (dollars in millions) Number of portfolio companies 79 88 28 Fair value $ 2,170.2 $ 1,499.3 $ 295.9 Cost $ 1,720.9 $ 1,519.9 $ 352.9 Debt investments as a % of portfolio (at cost) 72.0 % 96.1 % 92.9 % Equity investments as a % of portfolio (at cost) 28.0 % 3.9 % 7.1 % % of debt investments at cost secured by first priority lien 99.2 % 99.5 % 99.2 % Weighted-average annual effective yield (b) 12.9 % 12.6 % 11.8 % Average EBITDA (c) $ 8.0 $ 30.5 $ 67.6 ____________________ (a) At June 30, 2023, Main Street had equity ownership in all of its LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was 40%. (b) The weighted-average annual effective yields were computed using the effective interest rates for all debt investments at cost as of June 30, 2023, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status. The weighted-average annual effective yield on Main Street’s debt portfolio as of June 30, 2023 including debt investments on non-accrual status was 12.8% for its LMM portfolio, 12.3% for its Private Loan portfolio and 10.8% for its Middle Market portfolio. The weighted-average annual effective yield is not reflective of what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect changes in the market value of Main Street’s stock, Main Street’s utilization of debt capital in its capital structure, Main Street’s expenses or any sales load paid by an investor. (c) The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Private Loan and Middle Market portfolios. These calculations exclude certain portfolio companies, including two LMM portfolio companies and two Private Loan portfolio companies, as EBITDA is not a meaningful valuation metric for Main Street’s investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate. As of December 31, 2022 LMM (a) Private Loan Middle Market (dollars in millions) Number of portfolio companies 78 85 31 Fair value $ 2,060.5 $ 1,471.5 $ 329.1 Cost $ 1,719.9 $ 1,500.3 $ 401.7 Debt investments as a % of portfolio (at cost) 73.7 % 97.1 % 93.8 % Equity investments as a % of portfolio (at cost) 26.3 % 2.9 % 6.2 % % of debt investments at cost secured by first priority lien 99.1 % 99.6 % 98.8 % Weighted-average annual effective yield (b) 12.3 % 11.6 % 11.0 % Average EBITDA (c) $ 8.0 $ 38.1 $ 68.7 ____________________ (a) At December 31, 2022, Main Street had equity ownership in all of its LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was 41%. (b) The weighted-average annual effective yields were computed using the effective interest rates for all debt investments at cost as of December 31, 2022, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status. The weighted-average annual effective yield on Main Street’s debt portfolio as of December 31, 2022 including debt investments on non-accrual status was 11.6% for its LMM portfolio, 11.2% for its Private Loan portfolio and 10.3% for its Middle Market portfolio. The weighted-average annual effective yield is not reflective of what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect changes in the market value of Main Street’s stock, Main Street’s utilization of debt capital in its capital structure, Main Street’s expenses or any sales load paid by an investor. (c) The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Private Loan and Middle Market portfolios. These calculations exclude certain portfolio companies, including three LMM portfolio companies and two Private Loan portfolio companies, as EBITDA is not a meaningful valuation metric for Main Street’s investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate. The following tables summarize the composition of Main Street’s total combined LMM, Private Loan and Middle Market portfolio investments at cost and fair value by type of investment as a percentage of the total combined LMM, Private Loan and Middle Market portfolio investments, as of June 30, 2023 and December 31, 2022 (this information excludes Other Portfolio investments, short-term portfolio investments and the External Investment Manager, which are discussed above). Cost: June 30, 2023 December 31, 2022 First lien debt 83.8 % 85.0 % Equity 15.5 14.2 Second lien debt 0.3 0.3 Equity warrants 0.2 0.2 Other 0.2 0.3 100.0 % 100.0 % Fair Value: June 30, 2023 December 31, 2022 First lien debt 73.3 % 75.2 % Equity 25.9 24.1 Second lien debt 0.4 0.3 Equity warrants 0.2 0.1 Other 0.2 0.3 100.0 % 100.0 % The following tables summarize the composition of Main Street’s total combined LMM, Private Loan and Middle Market portfolio investments by geographic region of the United States and other countries at cost and fair value as a percentage of the total combined LMM, Private Loan and Middle Market portfolio investments, as of June 30, 2023 and December 31, 2022 (this information excludes Other Portfolio investments, short-term portfolio investments and the External Investment Manager). The geographic composition is determined by the location of the corporate headquarters of the portfolio company. Cost: June 30, 2023 December 31, 2022 West 25.6 % 28.5 % Northeast 21.6 19.0 Southwest 19.3 20.1 Midwest 16.0 16.3 Southeast 15.1 14.0 Other Non-United States 1.7 1.5 Canada 0.7 0.6 100.0 % 100.0 % Fair Value: June 30, 2023 December 31, 2022 West 26.2 % 28.7 % Southwest 21.3 21.4 Northeast 21.0 18.8 Midwest 16.3 16.6 Southeast 13.0 12.4 Other Non-United States 1.6 1.5 Canada 0.6 0.6 100.0 % 100.0 % Main Street’s LMM, Private Loan and Middle Market portfolio investments are in companies conducting business in a variety of industries. The following tables summarize the composition of Main Street’s total combined LMM, Private Loan and Middle Market portfolio investments by industry at cost and fair value as of June 30, 2023 and December 31, 2022 (this information excludes Other Portfolio investments, short-term portfolio investments and the External Investment Manager). Cost: June 30, 2023 December 31, 2022 Internet Software & Services 8.9 % 8.0 % Machinery 7.2 7.4 Commercial Services & Supplies 6.1 6.7 Construction & Engineering 5.7 5.8 Health Care Providers & Services 5.0 4.7 Diversified Consumer Services 4.9 4.5 IT Services 4.9 3.3 Professional Services 4.5 4.2 Distributors 4.2 5.1 Textiles, Apparel & Luxury Goods 3.3 1.9 Leisure Equipment & Products 3.1 4.5 Energy Equipment & Services 3.1 3.7 Tobacco 3.1 3.1 Computers & Peripherals 2.7 2.2 Specialty Retail 2.5 3.2 Media 2.4 2.4 Software 2.0 1.9 Building Products 1.8 1.9 Aerospace & Defense 1.8 2.3 Containers & Packaging 1.7 2.6 Diversified Telecommunication Services 1.7 1.9 Auto Components 1.6 1.7 Food Products 1.6 1.6 Electronic Equipment, Instruments & Components 1.6 1.6 Electrical Equipment 1.5 1.0 Communications Equipment 1.5 1.8 Diversified Financial Services 1.5 1.5 Internet & Catalog Retail 1.3 1.3 Health Care Equipment & Supplies 1.3 1.3 Food & Staples Retailing 1.1 1.2 Hotels, Restaurants & Leisure 1.1 1.1 Chemicals 1.0 1.1 Household Products 1.0 0.4 Other (1) 3.3 3.1 100.0 % 100.0 % ____________________ (1) Includes various industries with each industry individually less than 1.0% of the total combined LMM, Private Loan and Middle Market portfolio investments at each date. Fair Value: June 30, 2023 December 31, 2022 Machinery 8.3 % 8.4 % Internet Software & Services 7.4 6.8 Diversified Consumer Services 7.1 6.8 Construction & Engineering 5.6 5.7 Commercial Services & Supplies 5.2 6.1 Professional Services 5.1 3.8 Health Care Providers & Services 4.7 4.3 Distributors 4.5 5.5 IT Services 4.4 3.1 Computers & Peripherals 3.8 3.0 Tobacco 3.3 3.4 Specialty Retail 3.1 3.5 Media 2.9 3.0 Leisure Equipment & Products 2.8 4.0 Textiles, Apparel & Luxury Goods 2.8 1.8 Energy Equipment & Services 2.7 2.7 Software 2.1 2.1 Containers & Packaging 1.9 2.8 Aerospace & Defense 1.7 2.2 Food Products 1.7 1.8 Building Products 1.6 1.9 Electrical Equipment 1.6 1.0 Auto Components 1.5 1.6 Diversified Telecommunication Services 1.5 1.8 Diversified Financial Services 1.4 1.7 Internet & Catalog Retail 1.2 1.3 Construction Materials 1.1 1.0 Air Freight & Logistics 1.1 0.9 Health Care Equipment & Supplies 1.0 1.0 Chemicals 0.9 1.1 Food & Staples Retailing 0.8 1.1 Other (1) 5.2 4.8 100.0 % 100.0 % ____________________ (1) Includes various industries with each industry individually less than 1.0% of the total combined LMM, Private Loan and Middle Market portfolio investments at each date.

EXTERNAL INVESTMENT MANAGER (Ta

EXTERNAL INVESTMENT MANAGER (Tables)	6 Months Ended
EXTERNAL INVESTMENT MANAGER (Tables)	Jun. 30, 2023
Investment Company [Abstract]
Schedule of Information From External Investment Manager	Summarized financial information from the separate financial statements of the External Investment Manager as of June 30, 2023 and December 31, 2022 and for the three and six months ended June 30, 2023 and 2022 is as follows: As of June 30, As of December 31, 2022 (dollars in thousands) Accounts receivable - advisory clients $ 10,416 $ 8,130 Intangible Asset 29,500 29,500 Total assets $ 39,916 $ 37,630 Accounts payable to MSCC and its subsidiaries $ 7,557 $ 4,455 Dividend payable to MSCC and its subsidiaries 2,859 3,675 Equity 29,500 29,500 Total liabilities and equity $ 39,916 $ 37,630 Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (dollars in thousands) Management fee income $ 5,544 $ 5,421 $ 11,014 $ 10,865 Incentive fees 3,663 90 6,967 227 Administrative services fees 151 153 302 304 Total revenues 9,358 5,664 18,283 11,396 Expenses allocated from MSCC or its subsidiaries: Salaries, share-based compensation and other personnel costs (4,897) (2,653) (9,165) (4,913) Other G&A expenses (791) (809) (1,520) (1,366) Total allocated expenses (5,688) (3,462) (10,685) (6,279) Pre-tax income 3,670 2,202 7,598 5,117 Tax expense (811) (492) (1,683) (1,134) Net income $ 2,859 $ 1,710 $ 5,915 $ 3,983

DEBT (Tables)

DEBT (Tables)	6 Months Ended
DEBT (Tables)	Jun. 30, 2023
Debt Disclosure [Abstract]
Schedule of Debt	Summary of debt as of June 30, 2023 is as follows: Outstanding Unamortized Debt Issuance (Costs)/Premiums (1) Recorded Value Estimated Fair Value (2) (dollars in thousands) Corporate Facility $ 410,000 $ — $ 410,000 $ 410,000 SPV Facility 170,000 — 170,000 170,000 July 2026 Notes 500,000 (1,601) 498,399 440,345 May 2024 Notes 450,000 454 450,454 442,926 SBIC Debentures 350,000 (6,057) 343,943 290,232 December 2025 Notes 150,000 (1,294) 148,706 153,929 Total Debt $ 2,030,000 $ (8,498) $ 2,021,502 $ 1,907,432 ____________________ (1) The unamortized debt issuance costs for the Credit Facilities are reflected as Deferred financing costs on the Consolidated Balance Sheets, while the deferred debt issuance costs related to the July 2026 Notes, May 2024 Notes, SBIC Debentures and December 2025 Notes are reflected as contra-liabilities on the Consolidated Balance Sheets. (2) Estimated fair value for outstanding debt if Main Street had adopted the fair value option under ASC 825. See discussion of the methods used to estimate the fair value of Main Street’s debt in Note B.11. — Summary of Significant Accounting Policies — Fair Value of Financial Instruments. Summary of debt as of December 31, 2022 is as follows: Outstanding Unamortized Debt Issuance (Costs)/Premiums (1) Recorded Value Estimated Fair Value (2) (dollars in thousands) Corporate Facility $ 407,000 $ — $ 407,000 $ 407,000 SPV Facility 200,000 — 200,000 200,000 July 2026 Notes 500,000 (1,864) 498,136 434,250 May 2024 Notes 450,000 727 450,727 444,749 SBIC Debentures 350,000 (6,086) 343,914 290,204 December 2025 Notes 100,000 (675) 99,325 106,607 Total Debt $ 2,007,000 $ (7,898) $ 1,999,102 $ 1,882,810 ____________________ (1) The unamortized debt issuance costs for the Credit Facilities are reflected as Deferred financing costs on the Consolidated Balance Sheets, while the deferred debt issuance costs related to the July 2026 Notes, May 2024 Notes, SBIC Debentures and December 2025 Notes are reflected as contra-liabilities on the Consolidated Balance Sheets. (2) Estimated fair value for outstanding debt if Main Street had adopted the fair value option under ASC 825. See discussion of the methods used to estimate the fair value of Main Street’s debt in Note B.11. — Summary of Significant Accounting Policies — Fair Value of Financial Instruments.
Schedule of Interest Expense	Summarized interest expense for the three and six months ended June 30, 2023 and 2022 is as follows: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (dollars in thousands) Corporate Facility $ 7,898 $ 2,640 $ 14,508 $ 4,698 SPV Facility 3,511 — 6,941 — July 2026 Notes 3,882 3,882 7,763 7,763 May 2024 Notes 5,714 5,713 11,427 11,428 SBIC Debentures 2,718 2,827 5,470 5,627 December 2025 Notes 3,031 — 5,643 — December 2022 Notes — 2,233 — 4,466 Total Interest Expense $ 26,754 $ 17,295 $ 51,752 $ 33,982
Schedule of Condensed Balance Sheet and Statement of Operations of MSCC Funding	MSCC Funding balance sheets as of June 30, 2023 and December 31, 2022 are as follows: Balance Sheets (dollars in thousands) June 30, 2023 December 31, 2022 (Unaudited) ASSETS Investments at fair value: Non-Control Investments (cost: $318,309 and $314,752 as of June 30, 2023 and December 31, 2022, respectively) $ 320,629 $ 316,507 Cash and cash equivalents 8,200 10,838 Interest and dividend receivable and other assets 2,748 2,828 Accounts receivable to MSCC and its subsidiaries — 556 Receivable for securities sold — 369 Deferred financing costs (net of accumulated amortization of $426 and $141 as of June 30, 2023 and December 31, 2022, respectively) 2,568 2,630 Total assets 334,145 333,728 LIABILITIES SPV Facility $ 170,000 $ 200,000 Accounts payable and other liabilities 7,032 112 Interest payable 1,138 1,272 Total liabilities 178,170 201,384 NET ASSETS Contributed capital 138,163 126,010 Total undistributed earnings 17,812 6,334 Total net assets 155,975 132,344 Total liabilities and net assets $ 334,145 $ 333,728 MSCC Funding statement of operations for the three and six months ended June 30, 2023 are as follows: Statement of Operations (dollars in thousands) (Unaudited) Three Months Ended Six Months Ended June 30, 2023 INVESTMENT INCOME: Interest, fee and dividend income: Non‑Control/Non‑Affiliate investments $ 9,873 $ 18,590 Total investment income 9,873 18,590 EXPENSES: Interest (3,512) (6,940) Management Fee to MSCC (410) (686) General and administrative (19) (51) Total expenses (3,941) (7,677) NET INVESTMENT INCOME 5,932 10,913 NET UNREALIZED APPRECIATION: Non‑Control/Non‑Affiliate investments 1,956 565 Total net unrealized appreciation 1,956 565 NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $ 7,888 $ 11,478

FINANCIAL HIGHLIGHTS (Tables)

FINANCIAL HIGHLIGHTS (Tables)	6 Months Ended
FINANCIAL HIGHLIGHTS (Tables)	Jun. 30, 2023
Investment Company [Abstract]
Schedule of Financial Highlights	The following is a schedule of financial highlights of Main Street for the six months ended June 30, 2023 and 2022: Six Months Ended June 30, Per Share Data: 2023 2022 NAV at the beginning of the period $ 26.86 $ 25.29 Net investment income (1) 2.08 1.47 Net realized loss (1)(2) (1.30) (0.02) Net unrealized appreciation (depreciation) (1)(2) 1.75 (0.14) Income tax benefit (provision) (1)(2) (0.21) (0.21) Net increase in net assets resulting from operations (1) 2.32 1.10 Dividends paid from net investment income (1.75) (1.44) Dividends paid (1.75) (1.44) Impact of the net change in monthly dividends declared prior to the end of the period and paid in the subsequent period (0.01) — Accretive effect of stock offerings (issuing shares above NAV per share) 0.31 0.48 Accretive effect of DRIP issuance (issuing shares above NAV per share) 0.05 0.05 Other (3) (0.09) (0.11) NAV at the end of the period $ 27.69 $ 25.37 Market value at the end of the period $ 40.03 $ 38.53 Shares outstanding at the end of the period 81,431,006 73,517,558 ____________________ (1) Based on weighted-average number of common shares outstanding for the period. (2) Net realized gains or losses, net unrealized appreciation or depreciation, and income tax provision or benefit can fluctuate significantly from period to period. (3) Includes the impact of the different share amounts as a result of calculating certain per share data based on the weighted-average basic shares outstanding during the period and certain per share data based on the shares outstanding as of a period end or transaction date. Six Months Ended June 30, 2023 2022 (dollars in thousands) NAV at end of period $ 2,254,948 $ 1,865,163 Average NAV $ 2,178,819 $ 1,842,554 Average outstanding debt $ 1,991,714 $ 1,793,857 Ratio of total expenses, including income tax expense, to average NAV (1)(2) 2.32 % 3.97 % Ratio of operating expenses to average NAV (2)(3) 1.92 % 3.13 % Ratio of operating expenses, excluding interest expense, to average NAV (2)(3) 0.69 % 1.28 % Ratio of net investment income to average NAV (2) 3.93 % 5.80 % Portfolio turnover ratio (2) 7.76 % 10.48 % Total investment return (2)(4) 13.26 % (10.96) % Total return based on change in NAV (2)(5) 5.05 % 4.47 % ____________________ (1) Total expenses are the sum of operating expenses and net income tax provision. Net income tax provision includes the accrual of net deferred tax provision relating to the net unrealized appreciation or depreciation on portfolio investments held in Taxable Subsidiaries and due to the change in the loss carryforwards, which are non-cash in nature and may vary significantly from period to period. Main Street is required to include net deferred tax provision in calculating its total expenses even though these net deferred taxes are not currently payable or receivable. (2) Not annualized. (3) Unless otherwise noted, operating expenses include interest, compensation, general and administrative and share-based compensation expenses, net of expenses allocated to the External Investment Manager of $10.7 million and $6.3 million for the six months ended June 30, 2023 and 2022, respectively. (4) Total investment return is based on the purchase of stock at the current market price on the first day and a sale at the current market price on the last day of each period reported on the table and assumes reinvestment of dividends at prices obtained by Main Street’s dividend reinvestment plan during the period. The return does not reflect any sales load that may be paid by an investor. (5) Total return based on change in NAV was calculated using the sum of ending NAV plus dividends to stockholders and other non-operating changes during the period, divided by the beginning NAV. Non-operating changes include any items that affect NAV other than the net increase in net assets resulting from operations, such as the effects of stock offerings, shares issued under the DRIP and equity incentive plans and other miscellaneous items.

DIVIDENDS, DISTRIBUTIONS AND _2

DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME (Tables)	6 Months Ended
DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME (Tables)	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Schedule of Taxable Income and To Total Distributions Declared to Common Stock Reconciliation	Listed below is a reconciliation of “Net increase in net assets resulting from operations” to taxable income and to total distributions declared to common stockholders for the six months ended June 30, 2023 and 2022. Six Months Ended June 30, 2023 2022 (estimated, dollars in thousands) Net increase in net assets resulting from operations $ 186,107 $ 79,953 Book-tax difference from share-based compensation expense (7,646) (6,906) Net unrealized (appreciation) depreciation (140,059) 9,841 Income tax provision 16,760 15,417 Pre-tax book (income) loss not consolidated for tax purposes 44,328 (9,249) Book income and tax income differences, including debt origination, structuring fees, dividends, realized gains and changes in estimates 45,352 13,568 Estimated taxable income (1) 144,842 102,624 Taxable income earned in prior year and carried forward for distribution in current year 49,216 50,834 Taxable income earned prior to period end and carried forward for distribution next period (71,501) (64,509) Dividend payable as of period end and paid in the following period 18,729 15,673 Total distributions accrued or paid to common stockholders $ 141,286 $ 104,622 ____________________ (1) MSCC’s taxable income for each period is an estimate and will not be finally determined until the company files its tax return for each year. Therefore, the final taxable income, and the taxable income earned in each period and carried forward for distribution in the following period, may be different than this estimate.
Schedule of Components of Income Tax Expense (Benefit)	Main Street’s provision for income taxes was comprised of the following for the three and six months ended June 30, 2023 and 2022: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (dollars in thousands) Current tax expense: Federal $ 158 $ 64 $ 298 $ 115 State 433 71 1,289 614 Excise 1,080 674 1,820 1,389 Total current tax expense 1,671 809 3,407 2,118 Deferred tax expense: Federal 6,444 7,166 12,250 9,973 State 532 2,345 1,103 3,326 Total deferred tax expense 6,976 9,511 13,353 13,299 Total income tax provision $ 8,647 $ 10,320 $ 16,760 $ 15,417

DIVIDEND REINVESTMENT PLAN (Tab

DIVIDEND REINVESTMENT PLAN (Tables)	6 Months Ended
DIVIDEND REINVESTMENT PLAN (Tables)	Jun. 30, 2023
Equity [Abstract]
Schedule of Summarized Dividend Reinvestment Plan Information	Summarized DRIP information for the six months ended June 30, 2023 and 2022 is as follows: Six Months Ended June 30, 2023 2022 (dollars in thousands) DRIP participation $ 14,688 $ 9,813 Shares issued for DRIP 374,173 246,199

SHARE-BASED COMPENSATION (Table

SHARE-BASED COMPENSATION (Tables)	6 Months Ended
SHARE-BASED COMPENSATION (Tables)	Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]
schedule of Restricted Stock Issued	The following table summarizes the restricted stock issuances approved by Main Street’s Board of Directors under the Equity and Incentive Plan, net of shares forfeited, if any, and the remaining shares of restricted stock available for issuance as of June 30, 2023. Restricted stock authorized under the plan 5,000,000 Less net restricted stock granted (552,077) Restricted stock available for issuance as of June 30, 2023 4,447,923 As of June 30, 2023, the following table summarizes the restricted stock issued to Main Street’s non-employee directors and the remaining shares of restricted stock available for issuance pursuant to the Main Street Capital Corporation 2022 Non-Employee Director Restricted Stock Plan. These shares are granted upon appointment or election to the board and vest on the day immediately preceding the annual meeting of stockholders following the respective grant date and are expensed over such service period. Restricted stock authorized under the plan 300,000 Less net restricted stock granted (7,525) Restricted stock available for issuance as of June 30, 2023 292,475
Schedule of Summarized Restricted Stock Awards	Summarized RSA activity for the six months ended June 30, 2023 is as follows: Six Months Ended June 30, 2023 Number Weighted-Average Grant-Date Fair Value Restricted Stock Awards (RSAs): of Shares ( $ per share) Non-vested, December 31, 2022 817,401 $ 38.78 Granted (1) 544,533 39.42 Vested (1)(2) (398,914) 39.20 Forfeited (11,486) 40.50 Non-vested, June 30, 2023 951,534 $ 40.48 Aggregate intrinsic value as of June 30, 2023 (in thousands) $ 38,090 (3) ___________________________ (1) Restricted units generally vest over a three-year period from the grant date (as noted above). (2) Vested shares included 151,058 shares withheld for payroll taxes paid on behalf of employees. (3) Aggregate intrinsic value is the product of total non-vested restricted shares as of June 30, 2023 and $40.03 per share, the closing price of our common stock on June 30, 2023.

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	6 Months Ended
COMMITMENTS AND CONTINGENCIES (Tables)	Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Schedule of Outstanding Commitments	At June 30, 2023, Main Street had the following outstanding commitments (in thousands): Investments with equity capital commitments that have not yet funded: Amount Brightwood Capital Fund Investments Brightwood Capital Fund V, LP $ 3,000 Brightwood Capital Fund III, LP 300 3,300 Freeport Fund Investments Freeport First Lien Loan Fund III LP 6,733 Freeport Financial SBIC Fund LP 3,841 10,574 Harris Preston Fund Investments HPEP 4, L.P. 7,204 HPEP 3, L.P. 1,555 HPEP 423 COR, LP 600 2717 MH, L.P. 52 9,411 MS Private Loan Fund I, LP 750 UnionRock Energy Fund Investments UnionRock Energy Fund III, LP 9,850 UnionRock Energy Fund II, LP 1,907 11,757 Total Equity Commitments (1)(2) $ 35,792 Investments with commitments to fund revolving loans that have not been fully drawn or term loans with additional commitments not yet funded: Dalton US Inc. $ 16,463 HEADLANDS OP-CO LLC 10,125 MS Private Loan Fund I, LP 10,000 Xenon Arc, Inc. 9,408 Power System Solutions 9,255 JTI Electrical & Mechanical, LLC 8,421 AB Centers Acquisition Corporation 8,103 AMEREQUIP LLC. 7,704 SI East, LLC 7,500 PTL US Bidco, Inc 7,156 Archer Systems, LLC 7,115 Veregy Consolidated, Inc. 5,875 Robbins Bros. Jewelry, Inc. 4,500 South Coast Terminals Holdings, LLC 4,465 NWN Corporation 4,379 Direct Marketing Solutions, Inc. 4,250 Cody Pools, Inc. 4,214 Bettercloud, Inc. 4,189 Paragon Healthcare, Inc. 4,110 IG Investor, LLC 4,000 NexRev LLC 4,000 Watterson Brands, LLC 3,917 Microbe Formulas, LLC 3,601 Classic H&G Holdco, LLC 3,440 VVS Holdco, LLC 3,200 Imaging Business Machines, L.L.C. 2,965 MetalForming AcquireCo, LLC 2,795 Batjer TopCo, LLC 2,700 IG Parent Corporation 2,500 Nebraska Vet AcquireCo, LLC 2,500 Superior Rigging & Erecting Co. 2,500 CaseWorthy, Inc. 2,459 West Star Aviation Acquisition, LLC 2,411 Centre Technologies Holdings, LLC 2,400 Channel Partners Intermediateco, LLC 2,275 GS HVAM Intermediate, LLC 2,273 SPAU Holdings, LLC 2,235 Winter Services LLC 2,222 AVEX Aviation Holdings, LLC 2,210 ITA Holdings Group, LLC 2,174 ArborWorks, LLC 2,128 GRT Rubber Technologies LLC 2,050 Bluestem Brands, Inc. 2,019 Cybermedia Technologies, LLC 2,000 Engineering Research & Consulting, LLC 1,965 GULF PACIFIC ACQUISITION, LLC 1,919 Acumera, Inc. 1,885 Elgin AcquireCo, LLC 1,877 Johnson Downie Opco, LLC 1,800 NinjaTrader, LLC 1,750 RTIC Subsidiary Holdings, LLC 1,644 MonitorUS Holding, LLC 1,623 Trantech Radiator Topco, LLC 1,600 Chamberlin Holding LLC 1,600 Roof Opco, LLC 1,556 Burning Glass Intermediate Holding Company, Inc. 1,549 Pearl Meyer Topco LLC 1,500 Bond Brand Loyalty ULC 1,427 Career Team Holdings, LLC 1,350 American Health Staffing Group, Inc. 1,333 Escalent, Inc. 1,326 Evergreen North America Acquisitions, LLC 1,313 Mako Steel, LP 1,278 RA Outdoors LLC 1,278 Project Eagle Holdings, LLC 1,250 Gamber-Johnson Holdings, LLC 1,200 Eastern Wholesale Fence LLC 1,115 ATS Operating, LLC 1,080 Infolinks Media Buyco, LLC 1,008 Orttech Holdings, LLC 800 Mystic Logistics Holdings, LLC 800 Adams Publishing Group, LLC 788 Project BarFly, LLC 760 Inspire Aesthetics Management, LLC 555 Jensen Jewelers of Idaho, LLC 500 Invincible Boat Company, LLC. 457 Clad-Rex Steel, LLC 400 Wall Street Prep, Inc. 400 Gulf Publishing Holdings, LLC 400 Hawk Ridge Systems, LLC 334 ASC Interests, LLC 300 Jackmont Hospitality, Inc. 237 AAC Holdings, Inc. 200 SIB Holdings, LLC 160 Acousti Engineering Company of Florida 53 Interface Security Systems, L.L.C 1 Total Loan Commitments 248,577 Total Commitments $ 284,369 ____________________ (1) This table excludes commitments related to six additional Other Portfolio investments for which the investment period has expired and remaining commitments may only be drawn to pay fund expenses. The Company does not expect any material future capital to be called on its commitment to these investments and as a result has excluded those commitments from this table. (2) This table excludes commitments related to three additional Other Portfolio investments for which the investment period has expired and remaining commitments may only be drawn to pay fund expenses or for follow on investments in existing portfolio companies. The Company does not expect any material future capital to be called on its commitment to these investments to pay fund expenses, and based on representations from the fund manager, the Company does not expect any further capital will be called on its commitment for follow on investments. As a result, the Company has excluded those commitments from this table.

Consolidated Schedule of Inve_4

Consolidated Schedule of Investments In and Advances to Affiliates (Tables)	6 Months Ended
	Jun. 30, 2023
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Schedule of Investments in and Advances to Affiliates, Schedule of Investments	Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, Majority-owned investments Analytical Systems Keco Holdings, LLC L+ 10.00% Secured Debt (8) $ — $ — $ 3 $ (3) $ 1 $ — $ (2) 15.25% L+ 10.00% Secured Debt (8) — — 379 4,545 39 140 4,444 14.13% Preferred Member Units (8) — — — — — — — Preferred Member Units (8) — 566 — 3,504 566 — 4,070 Warrants (8) — — — — — — — Brewer Crane Holdings, LLC 15.17% L+ 10.00% Secured Debt (9) — (63) 429 5,964 — 311 5,653 Preferred Member Units (9) — (720) 60 7,080 — 720 6,360 Café Brazil, LLC Member Units (8) — (80) 103 2,210 — 80 2,130 California Splendor Holdings LLC 15.25% L+ 10.00% Secured Debt (9) — (7) 2,127 28,000 7 7 28,000 Preferred Member Units (9) — (2,060) 125 25,495 — 2,060 23,435 15.00% 15.00% Preferred Member Units (9) — — 301 3,994 301 — 4,295 Clad-Rex Steel, LLC Secured Debt (12) (5) — — 1 — — — — 11.50% Secured Debt (5) — (64) 621 10,440 18 824 9,634 10.00% Secured Debt (5) — — 52 1,039 — 17 1,022 Member Units (5) — (1,840) 275 8,220 — 1,840 6,380 Member Units (5) — 220 — 610 519 — 1,129 CMS Minerals Investments Member Units (9) 99 (366) 44 1,670 99 1,769 — Cody Pools, Inc. Secured Debt (12) (8) — 12 2 — — — — 12.50% Secured Debt (8) — 39 582 — 46,312 — 46,312 L+ 10.50% Secured Debt (8) — (19) 96 1,462 32 1,494 — L+ 10.50% Secured Debt (8) — (280) 2,683 40,801 — 40,801 — Preferred Member Units (8) — 6,940 1,446 58,180 6,940 — 65,120 CompareNetworks Topco, LLC L+ 9.00% Secured Debt (9) — — — — — — — 14.25% L+ 9.00% Secured Debt (9) — (5) 355 5,241 5 377 4,869 Preferred Member Units (9) — (3,450) 158 19,830 — 3,450 16,380 Cybermedia Technologies, LLC Secured Debt (12) (6) — — 2 — — — — 13.00% Secured Debt (6) — — 1,042 — 28,720 — 28,720 Preferred Member Units (6) — — — — 15,000 — 15,000 Datacom, LLC 7.50% Secured Debt (8) — — 18 223 583 90 716 10.00% Secured Debt (8) — — 507 7,789 78 135 7,732 Preferred Member Units (8) — (320) — 2,670 — 320 2,350 Direct Marketing Solutions, Inc. Secured Debt (12) (9) — (14) 23 — 14 14 — 13.00% Secured Debt (9) — (35) 1,876 27,267 35 837 26,465 Preferred Stock (9) — 1,130 343 22,220 1,130 — 23,350 Elgin AcquireCo, LLC SF+ 6.00% Secured Debt (12) (5) — — 4 (9) 1 — (8) 12.00% Secured Debt (5) — — 1,151 18,594 19 — 18,613 9.00% Secured Debt (5) — — 287 6,294 1 21 6,274 Common Stock (5) — 364 — 7,603 364 1,877 6,090 Common Stock (5) — 112 — 1,558 112 — 1,670 Gamber-Johnson Holdings, LLC SF+ 8.50% Secured Debt (12) (5) — — 3 — — — — 11.00% SF+ 8.00% Secured Debt (5) — (64) 3,598 64,078 64 4,464 59,678 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, Member Units (5) — 19,270 2,904 50,890 19,270 — 70,160 GRT Rubber Technologies LLC 11.17% L+ 6.00% Secured Debt (12) (8) — — 66 670 630 — 1,300 13.17% L+ 8.00% Secured Debt (8) — (23) 2,624 40,493 23 23 40,493 Member Units (8) — — 84 44,440 — — 44,440 Gulf Publishing Holdings, LLC L+ 9.50% Secured Debt (12) (8) — — — — — — — 12.50% Secured Debt (8) — — 151 2,284 — — 2,284 Preferred Equity (8) — — — 3,780 — — 3,780 Member Units (8) — — — — — — — IG Investor, LLC Secured Debt (12) (6) — — 84 — 761 800 (39) 13.00% Secured Debt (6) — — 896 — 37,333 — 37,333 Common Equity (6) — — — — 15,096 — 15,096 Independent Pet Partners Intermediate Holdings, LLC Common Equity (6) — — — — 18,300 — 18,300 Jensen Jewelers of Idaho, LLC P+ 6.75% Secured Debt (12) (9) — — — — — — — 15.00% P+ 6.75% Secured Debt (9) — (3) 183 2,450 3 3 2,450 Member Units (9) — (1,460) 626 14,970 — 1,460 13,510 Kickhaefer Manufacturing Company, LLC 12.00% Secured Debt (5) — — 1,407 20,374 195 — 20,569 9.00% Secured Debt (5) — — 175 3,842 1 19 3,824 Preferred Equity (5) — 510 — 7,220 510 — 7,730 Member Units (5) — (70) 60 2,850 — 70 2,780 Market Force Information, LLC L+ 11.00% Secured Debt (9) (6,662) 163 453 6,090 804 6,894 — Secured Debt (9) (25,952) 24,342 — 1,610 24,342 25,952 — Member Units (9) (16,642) 16,642 — — 16,642 16,642 — MetalForming AcquireCo, LLC Secured Debt (12) (7) — — 5 — — — — 12.75% Secured Debt (7) — — 1,518 23,576 23 — 23,599 8.00% 8.00% Preferred Equity (7) — 118 148 6,010 235 — 6,245 Common Stock (7) — (137) 619 1,537 — 137 1,400 MH Corbin Holding LLC 13.00% Secured Debt (5) — 1,150 392 4,548 1,150 195 5,503 Preferred Member Units (5) — — — — — — — Preferred Member Units (5) — — — — — — — MSC Adviser I, LLC Member Units (8) — 11,040 5,916 122,930 11,040 — 133,970 Mystic Logistics Holdings, LLC Secured Debt (12) (6) — — 2 — — — — 10.00% Secured Debt (6) — — 289 5,746 — — 5,746 Common Stock (6) — 4,320 1,977 22,830 4,320 — 27,150 OMi Topco, LLC 12.00% Secured Debt (8) — (25) 952 15,750 25 1,525 14,250 Preferred Member Units (8) — 6,500 1,350 22,810 6,500 — 29,310 PPL RVs, Inc. L+ 8.75% Secured Debt (8) — (1) 1 — 1 1 — 13.63% L+ 8.75% Secured Debt (8) — (39) 1,365 21,655 39 1,404 20,290 Common Stock (8) — (880) 157 18,950 — 880 18,070 Common Stock (8) — 12 — 238 12 — 250 Principle Environmental, LLC Secured Debt (8) — — — — — — — 13.00% Secured Debt (8) — — 397 5,806 11 — 5,817 Preferred Member Units (8) — (1,940) 429 12,420 — 1,940 10,480 Common Stock (8) — (90) — 590 — 90 500 Quality Lease Service, LLC Member Units (7) — (98) — 525 33 98 460 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, Robbins Bros. Jewelry, Inc. Secured Debt (12) (9) — — 16 (35) 4 — (31) 12.50% Secured Debt (9) — (444) 2,255 35,404 40 1,119 34,325 Preferred Equity (9) — (8,740) — 14,880 — 8,740 6,140 Trantech Radiator Topco, LLC Secured Debt (12) (7) — (2) 4 — 2 2 — 12.00% Secured Debt (7) — (9) 487 7,920 9 9 7,920 Common Stock (7) — 3,970 58 7,800 3,970 — 11,770 Volusion, LLC 10.00% Secured Debt (8) — — 54 — 2,100 — 2,100 Secured Debt (8) (3,188) 1,821 166 14,914 — 14,914 — Unsecured Convertible Debt (8) (409) 409 — — 409 409 — Preferred Member Units (8) — — — — — — — Preferred Member Units (8) — (706) — — 11,446 706 10,740 Preferred Member Units (8) — — — — — — — Common Stock (8) — (2,576) — — 2,576 2,576 — Warrants (8) — 2,576 — — — — — Ziegler’s NYPD, LLC 12.00% Secured Debt (8) — — 27 450 — — 450 6.50% Secured Debt (8) — — 33 945 — — 945 14.00% Secured Debt (8) — (215) 194 2,676 — 215 2,461 Preferred Member Units (8) — (170) — 240 — 170 70 Warrants (8) — — — — — — — Other controlled investments 2717 MH, L.P. LP Interests (2717 MH, L.P.) (8) 1,677 (675) 141 7,552 2,077 3,283 6,346 LP Interests (2717 HPP-MS, L.P.) (12) (8) — 67 — 248 67 — 315 ASC Interests, LLC 13.00% Secured Debt (12) (8) — — 27 400 — — 400 13.00% Secured Debt (8) — (52) 108 1,649 — 52 1,597 Member Units (8) — (384) — 800 94 384 510 ATS Workholding, LLC 5.00% Secured Debt (9) — (277) — 634 126 277 483 5.00% Secured Debt (9) — (286) — 1,005 — 286 719 Preferred Member Units (9) — — — — — — — Barfly Ventures, LLC 7.00% Secured Debt (12) (5) — — 44 711 — — 711 Member Units (5) — (280) — 3,320 — 280 3,040 Batjer TopCo, LLC Secured Debt (12) (8) — 7 1 (8) 8 — — Secured Debt (12) (8) — — — — — — — 10.00% Secured Debt (8) — 78 583 10,933 92 450 10,575 Preferred Stock (8) — 2,055 574 4,095 2,055 — 6,150 Bolder Panther Group, LLC Secured Debt (9) — — 1 — — — — 14.37% SF+ 9.19% Secured Debt (9) — (71) 6,976 99,194 71 1,390 97,875 8.00% Class B Preferred Member Units (9) — (300) 2,137 31,420 — 300 31,120 Bridge Capital Solutions Corporation 13.00% Secured Debt (6) — — 576 8,813 — — 8,813 13.00% Secured Debt (6) — — 65 1,000 — — 1,000 Preferred Member Units (6) — — 50 1,000 — — 1,000 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, Warrants (6) — 46 — 1,828 46 — 1,874 Warrants (6) — 64 — 2,512 64 — 2,576 CBT Nuggets, LLC Member Units (9) — 1,570 1,647 49,002 1,568 — 50,570 Centre Technologies Holdings, LLC L+ 9.00% Secured Debt (12) (8) — — 6 — — — — 14.25% L+ 9.00% Secured Debt (8) — 64 1,058 14,954 76 — 15,030 Preferred Member Units (8) — 1,700 60 8,700 1,700 — 10,400 Chamberlin Holding LLC SF+ 6.00% Secured Debt (12) (8) — 77 4 — — — — 13.36% SF+ 8.00% Secured Debt (8) — (6) 1,092 16,945 6 544 16,407 Member Units (8) — 1,020 1,491 22,920 1,020 — 23,940 Member Units (8) — 120 46 2,710 120 — 2,830 Charps, LLC 10.00% Unsecured Debt (5) — (17) 300 5,694 17 17 5,694 Preferred Member Units (5) — 460 246 13,340 460 — 13,800 Colonial Electric Company LLC Secured Debt (6) — — 47 — 1,600 1,600 — 12.00% Secured Debt (6) — (500) 1,406 23,151 28 1,130 22,049 Preferred Member Units (6) — 1,440 — — 2,400 — 2,400 Preferred Member Units (6) — (1,480) (1,179) 9,160 — 1,480 7,680 Copper Trail Fund Investments LP Interests (CTMH, LP) (9) — — — 588 — — 588 Digital Products Holdings LLC 15.25% SF+ 10.00% Secured Debt (5) — — 1,141 15,523 — 790 14,733 Preferred Member Units (5) — — 100 9,835 — — 9,835 Garreco, LLC 12.00% L+ 10.00% Secured Debt (8) — — 218 3,826 — 554 3,272 Member Units (8) — (220) 25 1,800 — 220 1,580 Gulf Manufacturing, LLC Member Units (8) — 1,210 1,351 6,790 1,210 — 8,000 Harrison Hydra-Gen, Ltd. Common Stock (8) — 210 — 3,280 210 — 3,490 Johnson Downie Opco, LLC L+ 11.50% Secured Debt (12) (8) — (2) 6 — 2 2 — 16.75% L+ 11.50% Secured Debt (8) — (11) 827 9,999 11 172 9,838 Preferred Equity (8) — 1,010 91 5,540 1,010 — 6,550 JorVet Holdings, LLC 12.00% Secured Debt (9) — — 1,573 25,432 26 — 25,458 Preferred Equity (9) — — 512 10,741 — — 10,741 KBK Industries, LLC 9.00% Secured Debt (5) — 49 320 — 6,000 700 5,300 Member Units (5) — (3,210) 6,496 15,570 — 3,210 12,360 MS Private Loan Fund Secured Debt (12) (8) — — 13 — — — — Secured Debt (8) — — — — — — — LP Interests (12) (8) — (198) 776 14,833 — 198 14,635 MSC Income Fund, Inc. Common Equity (8) — (65) 32 753 2,000 65 2,688 NAPCO Precast, LLC Member Units (8) — 880 — 11,830 880 — 12,710 Nebraska Vet AcquireCo, LLC L+ 7.00% Secured Debt (12) (5) — — 5 — — — — 12.00% Secured Debt (5) — 6 1,258 20,094 1,200 — 21,294 12.00% Secured Debt (5) — (11) 644 10,500 11 11 10,500 Preferred Member Units (5) — 5,090 302 7,700 5,090 — 12,790 NexRev LLC Secured Debt (12) (8) — — — — — — — 10.00% Secured Debt (8) — 1,500 616 8,477 1,545 1,654 8,368 Preferred Member Units (8) — 2,340 151 1,110 2,340 — 3,450 NRP Jones, LLC 12.00% Secured Debt (5) — — 126 2,080 — — 2,080 Member Units (5) — (750) 36 4,615 — 750 3,865 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, Member Units (5) — (31) (2) 175 — 30 145 NuStep, LLC 11.75% L+ 6.50% Secured Debt (5) — — 251 4,399 — — 4,399 12.00% Secured Debt (5) — — 1,119 18,414 6 — 18,420 Preferred Member Units (5) — 340 — 8,040 340 — 8,380 Preferred Member Units (5) — — — 5,150 — — 5,150 Orttech Holdings, LLC L+ 11.00% Secured Debt (12) (5) — — — — — — — 16.25% L+ 11.00% Secured Debt (5) — 142 1,863 23,429 171 800 22,800 Preferred Stock (5) — 4,810 537 11,750 4,810 — 16,560 Pearl Meyer Topco LLC 12.00% Secured Debt (12) (6) — 4 142 — 3,500 — 3,500 12.00% Secured Debt (6) — 40 534 — 13,500 — 13,500 12.00% Secured Debt (6) — (35) 1,722 28,681 35 1,035 27,681 Preferred Equity (6) — 830 5,708 43,260 830 — 44,090 River Aggregates, LLC Member Units (8) — — — 3,620 — — 3,620 Tedder Industries, LLC 12.00% Secured Debt (9) — — 111 1,840 — — 1,840 12.00% Secured Debt (9) — — 923 15,120 7 — 15,127 Preferred Member Units (9) — (1,391) — 7,681 — 1,391 6,290 Preferred Member Units (9) — 178 — — 533 — 533 Televerde, LLC Member Units (8) — 674 592 5,408 674 — 6,082 Preferred Stock (8) — — — 1,794 — — 1,794 Vision Interests, Inc. Series A Preferred Stock (9) — — 168 3,000 — — 3,000 VVS Holdco LLC L+ 6.00% Secured Debt (12) (5) — — 15 (21) 11 — (10) 11.50% Secured Debt (5) — — 1,768 30,161 39 1,242 28,958 Preferred Equity (5) — (100) 215 11,940 — 100 11,840 UnionRock Energy Fund III, LP LP Interests (12) (9) — — — — 150 — 150 — — — — — — — — — — — — — — Other — — — — — — — Amounts related to investments transferred to or from other 1940 Act classification during the period — — (171) (14,914) — — — Total Control investments $ (51,077) $ 92,940 $ 96,841 $ 1,703,172 $ 338,651 $ 173,038 $ 1,883,699 Affiliate Investments 423 HAR, LP LP Interests (423 HAR, L.P.) (8) $ — $ — $ — $ — $ 750 $ — $ 750 AAC Holdings, Inc. 18.00% 18.00% Secured Debt (12) (7) — (16) 27 — 376 16 360 18.00% 18.00% Secured Debt (7) — (558) 1,149 11,550 1,149 558 12,141 Common Stock (7) — — — — — — — Warrants (7) — — — — — — — AFG Capital Group, LLC Preferred Member Units (8) 7,200 (8,200) — 9,400 7,200 16,600 — ATX Networks Corp. L+ 7.50% Secured Debt (6) — (134) 886 6,343 575 6,918 — Unsecured Debt (6) — (306) 1,160 2,598 1,160 3,758 — Common Stock (6) 3,248 (3,270) — 3,270 3,248 6,518 — BBB Tank Services, LLC 16.17% L+ 11.00% Unsecured Debt (8) — — 63 800 — — 800 16.17% L+ 11.00% Unsecured Debt (8) — 116 317 2,086 116 — 2,202 Member Units (8) — — — — — — — Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, 15.00% Preferred Stock (non-voting) (8) — — — — — — — Boccella Precast Products LLC 10.00% Secured Debt (6) — — 16 320 — — 320 Member Units (6) — (620) 41 2,970 — 620 2,350 Buca C, LLC 12.00% Secured Debt (7) — — 1,044 12,337 — 373 11,964 6.00% 6.00% Preferred Member Units (7) — — — — — — — Career Team Holdings, LLC 11.25% L+ 6.00% Secured Debt (12) (6) — — 10 (9) 451 — 442 12.50% Secured Debt (6) — — 1,293 20,090 20 — 20,110 Common Stock (6) — — — 4,500 — — 4,500 Chandler Signs Holdings, LLC Class A Units (8) 1,797 (290) 60 1,790 1,797 3,587 — Classic H&G Holdings, LLC 11.25% L+ 6.00% Secured Debt (12) (6) — — 260 4,560 — — 4,560 8.00% Secured Debt (6) — (21) 797 19,274 21 21 19,274 Preferred Member Units (6) — (6,410) 4,745 24,637 — 6,407 18,230 Congruent Credit Opportunities Funds LP Interests (Congruent Credit Opportunities Fund III, LP) (8) — (223) 316 7,657 — 2,095 5,562 DMA Industries, LLC 12.00% Secured Debt (7) — (21) 1,272 21,200 21 1,221 20,000 Preferred Equity (7) — — — 7,260 — — 7,260 Dos Rios Partners LP Interests (Dos Rios Partners, LP) (8) 757 156 — 9,127 915 904 9,138 LP Interests (Dos Rios Partners - A, LP) (8) 241 — — 2,898 241 287 2,852 Dos Rios Stone Products LLC Class A Preferred Units (8) — 250 — 1,330 250 — 1,580 EIG Fund Investments LP Interests (EIG Global Private Debt Fund-A, L.P.) (8) 16 — 43 1,013 16 55 974 Flame King Holdings, LLC L+ 6.50% Secured Debt (9) — (60) 484 7,600 60 7,660 — L+ 9.00% Secured Debt (9) — (162) 1,583 21,200 162 21,362 — Preferred Equity (9) — 6,770 2,050 17,580 6,770 — 24,350 Freeport Financial SBIC Fund LP LP Interests (Freeport Financial SBIC Fund LP) (12) (5) — 145 — 3,483 145 — 3,628 LP Interests (Freeport First Lien Loan Fund III LP) (12) (5) — — 291 5,848 — 536 5,312 GFG Group, LLC 9.00% Secured Debt (5) — (12) 525 11,345 12 12 11,345 Preferred Member Units (5) — 1,170 102 7,140 1,170 — 8,310 Hawk Ridge Systems, LLC 11.53% SF+ 6.00% Secured Debt (12) (9) — — 173 3,185 4,581 4,100 3,666 12.50% Secured Debt (9) — 4 2,173 37,800 4,142 — 41,942 Preferred Member Units (9) — — 131 17,460 — — 17,460 Preferred Member Units (9) — — — 920 — — 920 Houston Plating and Coatings, LLC 8.00% Unsecured Convertible Debt (8) — (170) 121 3,000 — 170 2,830 Member Units (8) — 1,160 2 2,400 1,160 — 3,560 HPEP 3, L.P. LP Interests (HPEP 3, L.P.) (12) (8) — 283 — 4,331 283 508 4,106 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, LP Interests (HPEP 4, L.P.) (12) (8) — — — 2,332 464 — 2,796 LP Interests (423 COR, LP) (12) (8) — — 117 1,400 — — 1,400 I-45 SLF LLC Member Units (Fully diluted 20.0%; 21.75% profits interest) (8) — (1,207) 1,123 11,758 1,200 1,207 11,751 Infinity X1 Holdings, LLC 13.00% Secured Debt (9) — — 790 — 17,832 — 17,832 Preferred Equity (9) — — — — 4,000 — 4,000 Integral Energy Services 13.04% L+ 7.50% Secured Debt (8) — (227) 1,036 15,769 33 227 15,575 Common Stock (8) — (460) 21 1,280 — 460 820 Iron-Main Investments, LLC 13.50% Secured Debt (5) — — 307 4,500 4 20 4,484 13.50% Secured Debt (5) — — 214 3,130 3 14 3,119 13.50% Secured Debt (5) — — 600 8,944 — — 8,944 13.50% Secured Debt (5) — — 1,337 19,559 17 88 19,488 13.50% Secured Debt (5) — — 890 — 10,857 38 10,819 Common Stock (5) — — — 1,798 958 — 2,756 ITA Holdings Group, LLC SF+ 9.00% 2.00% Secured Debt (12) (8) — — 12 — — 12 (12) SF+ 9.00% 2.00% Secured Debt (12) (8) — — — — — 10 (10) 15.38% SF+ 8.00% 2.00% Secured Debt (8) — — 84 — 3,252 — 3,252 17.38% SF+ 10.00% 2.00% Secured Debt (8) — — 86 — 3,252 — 3,252 Warrants (8) — — — — 2,091 — 2,091 OnAsset Intelligence, Inc. 12.00% 12.00% Secured Debt (8) — (127) — 569 — 128 441 12.00% 12.00% Secured Debt (8) — (130) — 580 — 130 450 12.00% 12.00% Secured Debt (8) — (280) — 1,249 — 280 969 12.00% 12.00% Secured Debt (8) — (584) — 2,606 — 584 2,022 10.00% 10.00% Unsecured Debt (8) — — — 305 — — 305 7.00% 7.00% Preferred Stock (8) — — — — — — — Common Stock (8) — — — — — — — Warrants (8) — — — — — — — Oneliance, LLC L+ 11.00% Secured Debt (7) — — — — — — — 16.25% L+ 11.00% Secured Debt (7) — (61) 447 5,559 6 141 5,424 Preferred Stock (7) — — — 1,056 72 — 1,128 Quality Lease Service, LLC Secured Debt (8) (29,526) 29,865 — — 29,865 29,865 — Preferred Member Units (8) — — — — — — — SI East, LLC Secured Debt (12) (7) — — 14 — — — — 12.78% Secured Debt (7) — 268 568 — 54,536 — 54,536 Secured Debt (7) — (79) 3,885 89,786 — 89,786 — Preferred Member Units (7) — 1,823 639 13,650 2,130 — 15,780 Slick Innovations, LLC 14.00% Secured Debt (6) — (22) 980 13,840 22 822 13,040 Common Stock (6) — 320 — 1,530 320 — 1,850 Student Resource Center, LLC 8.50% 8.50% Secured Debt (6) — — 216 4,556 214 — 4,770 Preferred Equity (6) — — — — — — — Superior Rigging & Erecting Co. 12.00% Secured Debt (7) — — 1,285 21,378 27 1,000 20,405 Preferred Member Units (7) — 1,140 — 4,500 1,140 — 5,640 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1) (10) (11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, The Affiliati Network, LLC Secured Debt (9) — — 12 106 1,962 2,080 (12) 13.00% Secured Debt (9) — (129) 607 9,442 15 729 8,728 Preferred Stock (9) — — 80 6,400 — — 6,400 UnionRock Energy Fund II, LP LP Interests (12) (9) — (964) 25 5,855 531 1,162 5,224 UniTek Global Services, Inc. SF+ 7.50% Secured Debt (6) — 22 (2) 382 25 407 — SF+ 7.50% Secured Debt (6) — 96 282 1,712 112 1,824 — 15.00% 15.00% Secured Convertible Debt (6) — 1,380 187 4,592 1,567 — 6,159 20.00% 20.00% Preferred Stock (6) — (221) 221 2,833 221 221 2,833 20.00% 20.00% Preferred Stock (6) — 1,668 — 1,991 1,668 — 3,659 19.00% 19.00% Preferred Stock (6) — — — — — — — 13.50% 13.50% Preferred Stock (6) — — — — — — — Common Stock (6) — — — — — — — Universal Wellhead Services Holdings, LLC 14.00% 14.00% Preferred Member Units (8) — — — 220 — — 220 Member Units (8) — — — — — — — World Micro Holdings, LLC 13.00% Secured Debt (7) — — 948 14,140 14 — 14,154 Preferred Equity (7) — — 139 3,845 — — 3,845 Other — — — — — — — Amounts related to investments transferred to or from other 1940 Act classification during the period — — 171 14,914 — — — Total Affiliate investments $ (16,267) $ 21,672 $ 38,455 $ 618,359 $ 175,201 $ 215,521 $ 563,125 ____________________ (1) The principal amount, the ownership detail for equity investments and if the investment is income producing is included in the Consolidated Schedule of Investments included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. (2) Represents the total amount of interest, fees and dividends credited to income for the portion of the period for which an investment was included in Control or Affiliate categories, respectively. For investments transferred between Control and Affiliate categories during the period, any income or investment balances related to the time period it was in the category other than the one shown at period end is included in “Amounts related to investments transferred from other 1940 Act classifications during the period.” (3) Gross additions include increases in the cost basis of investments resulting from new portfolio investments, follow-on investments and accrued PIK interest, and the exchange of one or more existing securities for one or more new securities. Gross additions also include net increases in unrealized appreciation or net decreases in net unrealized depreciation as well as the movement of an existing portfolio company into this category and out of a different category. (4) Gross reductions include decreases in the cost basis of investments resulting from principal repayments or sales and the exchange of one or more existing securities for one or more new securities. Gross reductions also include net increases in net unrealized depreciation or net decreases in unrealized appreciation as well as the movement of an existing portfolio company out of this category and into a different category. (5) Portfolio company located in the Midwest region as determined by location of the corporate headquarters. The fair value as of June 30, 2023 for control investments located in this region was $453,692. This represented 24.1% of net assets as of June 30, 2023. The fair value as of June 30, 2023 for affiliate investments located in this region was $78,205. This represented 13.9% of net assets as of June 30, 2023. (6) Portfolio company located in the Northeast region and Canada as determined by location of the corporate headquarters. The fair value as of June 30, 2023 for control investments located in this region was $283,469. This represented 15.0% of net assets as of June 30, 2023. The fair value as of June 30, 2023 for affiliate investments located in this region was $102,097. This represented 18.1% of net assets as of June 30, 2023. (7) Portfolio company located in the Southeast region as determined by location of the corporate headquarters. The fair value as of June 30, 2023 for control investments located in this region was $51,394. This represented 2.7% of net assets as of June 30, 2023. The fair value as of June 30, 2023 for affiliate investments located in this region was $172,637. This represented 30.7% of net assets as of June 30, 2023. (8) Portfolio company located in the Southwest region as determined by location of the corporate headquarters. The fair value as of June 30, 2023 for control investments located in this region was $655,449. This represented 34.8% of net assets as of June 30, 2023. The fair value as of June 30, 2023 for affiliate investments located in this region was $79,676. This represented 14.1% of net assets as of June 30, 2023. (9) Portfolio company located in the West region as determined by location of the corporate headquarters. The fair value as of June 30, 2023 for control investments located in this region was $439,695. This represented 23.3% of net assets as of June 30, 2023. The fair value as of June 30, 2023 for affiliate investments located in this region was $130,510. This represented 23.2% of net assets as of June 30, 2023. (10) All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities,” unless otherwise noted. (11) This schedule should be read in conjunction with the Consolidated Schedule of Investments and Notes to the Consolidated Financial Statements included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. Supplemental information can be located within the Consolidated Schedule of Investments including end of period interest rate, preferred dividend rate, maturity date, investments not paid currently in cash and investments whose value was determined using significant unobservable inputs. (12) Investment has an unfunded commitment as of June 30, 2023 (see Note K ). The fair value of the investment includes the impact of the fair value of any unfunded commitments. (13) Negative fair value is the result of the capitalized discount being greater than the principal amount outstanding on the loan. Company Total Rate Base Rate Spread PIK Rate Type of Investment(1)(10)(11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, Majority-owned investments Analytical Systems Keco Holdings, LLC 12.00% L+ 10.00% Secured Debt (8) $ — $ — $ 339 $ 4,736 $ 45 $ 140 $ 4,641 Preferred Member Units (8) — (576) — 4,894 — 576 4,318 Brewer Crane Holdings, LLC 11.06% L+ 10.00% Secured Debt (9) — — 448 8,037 12 248 7,801 Preferred Member Units (9) — (660) 530 7,710 — 660 7,050 Café Brazil, LLC Member Units (8) — (50) 99 2,570 — 50 2,520 California Splendor Holdings LLC 11.00% L+ 10.00% Secured Debt (9) — 56 1,578 27,915 85 — 28,000 15.00% 15.00% Preferred Member Units (9) — — 652 9,510 652 6,449 3,713 Preferred Member Units (9) — 6,020 125 13,275 6,020 — 19,295 Clad-Rex Steel, LLC 10.63% L+ 9.50% Secured Debt (5) — — 574 10,401 20 — 10,421 10.00% Secured Debt (5) — — 54 1,071 — 16 1,055 Member Units (5) — 80 — 530 80 — 610 Member Units (5) — — 764 10,250 — — 10,250 CMS Minerals Investments Member Units (9) — 447 69 1,974 447 147 2,274 Cody Pools, Inc. 12.25% L+ 10.50% Secured Debt (8) — (45) 2,702 42,484 2,910 3,757 41,637 Preferred Member Units (8) — 3,550 1,749 47,640 3,550 — 51,190 CompareNetworks Topco, LLC 10.13% L+ 9.00% Secured Debt (9) — (10) 308 6,477 10 746 5,741 Preferred Member Units (9) — 5,230 316 12,000 5,230 — 17,230 Datacom, LLC 7.50% Secured Debt (8) — — 416 7,668 84 135 7,617 Preferred Member Units (8) — 60 48 2,610 60 — 2,670 Direct Marketing Solutions, Inc. 12.13% L+ 11.00% Secured Debt (9) — (20) 1,551 24,048 1,317 687 24,678 Preferred Stock (9) — 3,200 686 18,350 3,200 — 21,550 Gamber-Johnson Holdings, LLC 10.50% L+ 8.00% Secured Debt (5) — (11) 1,100 21,598 11 11 21,598 Member Units (5) — (3,400) 360 49,700 — 3,400 46,300 GRT Rubber Technologies LLC 9.06% L+ 8.00% Secured Debt (8) — (22) 1,676 38,885 22 22 38,885 Member Units (8) — — 2,441 46,190 — — 46,190 Jensen Jewelers of Idaho, LLC 10.00% P+ 6.75% Secured Debt (9) — (4) 130 2,550 4 104 2,450 Member Units (9) — 2,700 1,376 12,420 2,700 — 15,120 Kickhaefer Manufacturing Company, LLC 11.50% Secured Debt (5) — — 1,205 20,324 25 — 20,349 9.00% Secured Debt (5) — — 177 3,876 1 17 3,860 Member Units (5) — (70) — 12,310 — 70 12,240 Member Units (5) — — 55 2,460 — — 2,460 Market Force Information, LLC 12.13% L+ 11.00% Secured Debt (9) — — 217 3,400 1,000 — 4,400 12.00% 12.00% Secured Debt (9) — (1,405) — 8,936 — 1,405 7,531 MH Corbin Holding LLC 13.00% Secured Debt (5) — (1,495) 540 5,934 9 1,655 4,288 MSC Adviser I, LLC Member Units (8) — (22,080) 3,983 140,400 — 22,080 118,320 Mystic Logistics Holdings, LLC 10.00% Secured Debt (6) — (1) 312 6,378 1 281 6,098 Common Stock (6) — 7,370 1,596 8,840 7,370 — 16,210 OMi Topco, LLC 12.00% Secured Debt (8) — (29) 1,099 18,000 29 1,279 16,750 Preferred Member Units (8) — 90 1,197 20,210 90 — 20,300 PPL RVs, Inc. 7.97% L+ 7.00% Secured Debt (8) — 251 683 12,381 9,264 2,000 19,645 Common Stock (8) — 4,130 462 14,360 4,130 — 18,490 Principle Environmental, LLC 13.00% Secured Debt (8) — — 86 1,465 6 1,000 471 13.00% Secured Debt (8) — — 399 5,808 12 — 5,820 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1)(10)(11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, Preferred Member Units (8) — 370 437 11,160 370 — 11,530 Common Stock (8) — 30 — 710 30 — 740 Quality Lease Service, LLC Member Units (7) — 76 — 2,149 76 1,150 1,075 Robbins Bros. Jewelry, Inc. 12.00% L+ 11.00% Secured Debt (9) — — 2,241 35,956 43 225 35,774 Preferred Equity (9) — 4,670 279 11,070 4,670 — 15,740 Trantech Radiator Topco, LLC 12.00% Secured Debt (7) — (12) 528 8,712 14 412 8,314 Common Stock (7) — (570) 58 8,660 — 570 8,090 Ziegler’s NYPD, LLC 12.00% Secured Debt (8) — — 38 625 — — 625 6.50% Secured Debt (8) — — 33 1,000 — — 1,000 14.00% Secured Debt (8) — — 194 2,750 — — 2,750 Preferred Member Units (8) — (450) — 2,130 — 450 1,680 Other controlled investments 2717 MH, L.P. LP Interests (2717 MH, L.P.) (8) — 1,408 — 3,971 2,583 — 6,554 LP Interests (2717 HPP-MS, L.P.) (8) — — — — 244 — 244 ASC Interests, LLC 13.00% Secured Debt (8) — — 13 200 — 30 170 13.00% Secured Debt (8) — — 120 1,636 12 — 1,648 Member Units (8) — 80 — 720 80 — 800 ATS Workholding, LLC 5.00% Secured Debt (9) — — — 3,005 — 66 2,939 Barfly Ventures, LLC 7.00% Secured Debt (5) — — 25 711 — — 711 Member Units (5) — 470 — 1,930 470 — 2,400 Batjer TopCo, LLC 11.00% Secured Debt (8) — — 512 — 11,372 459 10,913 Member Units (8) — — — — 4,073 — 4,073 Bolder Panther Group, LLC 10.50% L+ 9.00% Secured Debt (9) — (39) 2,491 39,000 10,233 39 49,194 Class B Preferred Member Units (9) — 2,760 276 23,170 2,760 — 25,930 Bridge Capital Solutions Corporation 13.00% Secured Debt (6) — — 576 8,813 — — 8,813 13.00% Secured Debt (6) — — 65 1,000 — — 1,000 Preferred Member Units (6) — — 50 1,000 — — 1,000 Warrants (6) — 200 — 4,060 200 — 4,260 CBT Nuggets, LLC Member Units (9) — (2,720) 1,647 50,620 — 2,720 47,900 Centre Technologies Holdings, LLC 12.00% L+ 10.00% Secured Debt (8) — 507 838 8,864 7,903 1,826 14,941 Preferred Member Units (8) — 768 60 5,840 1,050 — 6,890 Chamberlin Holding LLC 9.13% L+ 8.00% Secured Debt (8) — (35) 845 17,817 35 386 17,466 Member Units (8) — (1,630) 348 24,140 — 1,630 22,510 Member Units (8) — — 34 1,540 — — 1,540 Charps, LLC 10.00% Unsecured Debt (5) — (27) 309 5,694 27 27 5,694 Preferred Member Units (5) — (540) 417 13,990 — 540 13,450 Colonial Electric Company LLC 12.00% Secured Debt (6) — — 1,703 24,351 1,630 630 25,351 Preferred Member Units (6) — (190) 805 9,130 — 190 8,940 Copper Trail Fund Investments LP Interests (CTMH, LP) (9) — — — 710 — — 710 Digital Products Holdings LLC 11.13% L+ 10.00% Secured Debt (5) — — 929 16,801 23 661 16,163 Preferred Member Units (5) — — 100 9,835 — — 9,835 Company Total Rate Base Rate Spread PIK Rate Type of Investment(1)(10)(11) Geography Amount of Amount of Amount of December 31, Gross Gross June 30, Flame King Holdings, LLC 7.50% L+ 6.50% Secured Debt (9) — 68 288 6,324 1,276 — 7,600 12.00% L+ 11.00% Secured Debt (9) — 183 1,300 20,996 204 — 21,200 Preferred Equity (9) — 3,010 559 10,400 3,010 — 13,410 Garreco, LLC 9.00% L+ 8.00% Secured Debt (8) — — 190 4,196 — — 4,196 Member Units (8) — 220 321 2,270 220 — 2,490 Gulf Manufacturing, LLC Member Units (8) — (130) 985 5,640 — 130 5,510 Gulf Publishing Holdings, LLC 10.60% 5.25% Secured Debt (8) — — 7 257 — — 257 12.50% 6.25% Secured Debt (8) — (2,188) 426 9,717 — 2,188 7,529 Harrison Hydra-Gen, Ltd. Common Stock (8) — (200) — 3,530 — 200 3,330 Johnson Downie Opco, LLC 13.00% L+ 11.50% Secured Debt (8) — 92 755 11,344 115 1,038 10,421 Preferred Equity (8) — 2,730 566 3,150 2,730 — 5,880 JorVet Holdings, LLC 12.00% Secured Debt (9) — — 1,082 — 25,406 — 25,406 Common Stock (9) — — 54 — 10,741 — 10,741 KBK Industries, LLC Member Units (5) — 310 685 13,620 310 — 13,930 MS Private Loan Fund LP Interests (8) — (544) 191 2,581 8,750 544 10,787 MSC Income Fund, Inc. Common Equity (8) — — — — 750 — 750 NAPCO Precast, LLC Member Units (8) — (1,730) 4 13,560 — 1,730 11,830 Nebraska Vet AcquireCo, LLC 12.00% Secured Debt (5) — — 649 10,412 11 — 10,423 12.00% Secured Debt (5) — — 548 4,829 6,544 — 11,373 Preferred Member Units (5) — — — 7,700 — — 7,700 NexRev LLC 11.00% Secured Debt (8) — (1,703) 1,222 14,045 — 5,783 8,262 Preferred Member Units (8) — (3,080) 40 2,690 — 1,750 940 NRP Jones, LLC 12.00% Secured Debt (5) — — 126 2,080 — — 2,080 Member Units (5) — (970) 198 6,440 — 970 5,470 NuStep, LLC 7.63% L+ 6.50% Secured Debt (5) — — 110 1,720 1,480 — 3,200 12.00% Secured Debt (5) — 28 1,043 17,240 1,200 — 18,440 Preferred Member Units (5) — (1,940) — 13,500 — 1,940 11,560 Orttech Holdings, LLC 12.00% L+ 11.00% Secured Debt (5) — — 1,494 24,150 29 400 23,779 Preferred Stock (5) — — 386 10,000 — — 10,000 Pearl Meyer Topco LLC 12.00% Secured Debt (6) — (61) 1,942 32,674 1,561 5,554 28,681 Member Units (6) — 12,780 2,856 26,970 12,780 — 39,750 River Aggregates, LLC Member Units (8) — 100 — 3,280 100 — 3,380 Tedder Industries, LLC 12.00% Secured Debt (9) — — 961 15,141 44 — 15,185 12.00% Secured Debt (9) — — 102 1,040 800 — 1,840 Preferred Member Units (9) — (1,487) — 8,579 222 1,487 7,314 Televerde, LLC Member Units (8) — (2,135) — 7,280 — 2,135 5,145 Preferred Stock (8) — 1,076 — — 1,794 — 1,794 Vision Interests, Inc. Series A Preferred Stock (9) — — 144 3,000 — — 3,000 VVS Holdco LLC 11.50% Secured Debt (5) — — 1,821 31,269 34 1,201 30,102 Prefe

SUMMARY OF SIGNIFICANT ACCOUN_4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023 USD ($) company investment	Jun. 30, 2022 company	Jun. 30, 2023 USD ($) company investment	Jun. 30, 2022 company	Dec. 31, 2022 USD ($) investment
Schedule of Investments [Line Items]
Cash exceeded federal deposit insurance corporation insurance protection levels \| $	$ 46		$ 46		$ 46.3
Percentage of total investment income, attributable to noncash paid-in-kind interest income	1.80%	1.70%	2.10%	1.40%
Percentage of total investment come, attributable to noncash cumulative dividend income	0.20%	0.20%	0.30%	0.60%
Percentage of total investment income, attributable to interest income, debt investments, net	1.80%	2%	1.80%	2%
Investment Owned, At Fair Value \| Investment Type Concentration Risk
Schedule of Investments [Line Items]
Concentration risk, percentage			100%		100%
Investment Owned, At Cost \| Investment Type Concentration Risk
Schedule of Investments [Line Items]
Concentration risk, percentage			100%		100%
Non-accrual Status
Schedule of Investments [Line Items]
Number of investments \| investment	9		9		12
Non-accrual Status \| Investment Owned, At Fair Value \| Investment Type Concentration Risk
Schedule of Investments [Line Items]
Concentration risk, percentage			0.30%		0.60%
Non-accrual Status \| Investment Owned, At Cost \| Investment Type Concentration Risk
Schedule of Investments [Line Items]
Concentration risk, percentage			1.70%		3.70%
Revolving Credit Facility \| Line of Credit
Schedule of Investments [Line Items]
Commitment fee (in percentage)			3.40%
LMM portfolio investments
Schedule of Investments [Line Items]
Consultation period subsequent to initial investment			12 months
Investment company, number of portfolio companies with annual third-party appraisal was obtained, reviewed and certified	37	36	37	36
Percentage of portfolio with annual third-party appraisal was obtained, reviewed and certified			55%	61%
LMM portfolio investments \| Investment Owned, At Fair Value \| Investment Type Concentration Risk
Schedule of Investments [Line Items]
Concentration risk, percentage			52%	54%
Private Loan portfolio investments
Schedule of Investments [Line Items]
Consultation period subsequent to initial investment			12 months
Investment company, number of portfolio companies with annual third-party appraisal was obtained, reviewed and certified	33	29	33	29
Percentage of portfolio with annual third-party appraisal was obtained, reviewed and certified			53%	67%
Private Loan portfolio investments \| Investment Owned, At Fair Value \| Investment Type Concentration Risk
Schedule of Investments [Line Items]
Concentration risk, percentage			49%	44%
Middle Market portfolio investments
Schedule of Investments [Line Items]
Percentage of portfolio investments containing limited consultation with financial advisory services firm	90%		90%		89%
Other Portfolio investments \| Investment Owned, At Fair Value \| Investment Type Concentration Risk
Schedule of Investments [Line Items]
Concentration risk, percentage			2.60%		2.80%
Other Portfolio investments \| Investment Owned, At Cost \| Investment Type Concentration Risk
Schedule of Investments [Line Items]
Concentration risk, percentage			3.20%		3.20%

SUMMARY OF SIGNIFICANT ACCOUN_5

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Investment Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accounting Policies [Abstract]
Interest income	$ 97,273	$ 63,984	$ 190,666	$ 123,426
Dividend income	25,599	17,913	49,821	34,535
Fee income	4,711	3,303	7,351	6,635
Total interest, fee and dividend income	$ 127,583	$ 85,200	$ 247,838	$ 164,596

FAIR VALUE HIERARCHY FOR INVE_3

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Narrative (Details) $ in Thousands	3 Months Ended			6 Months Ended			12 Months Ended
	Jun. 30, 2023 USD ($) company entity	Jun. 30, 2022 USD ($)		Jun. 30, 2023 USD ($) company entity	Jun. 30, 2022 USD ($)		Dec. 31, 2022 USD ($) entity company investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Expenses allocated	$ 5,688	$ 3,462		$ 10,686	$ 6,279
Annualized total return on investments	0.167	0.065		0.151	0.092
Achieved total return on investments							0.111
Fair value	$ 4,210,543	$ 4,210,543	[1]	$ 4,210,543	$ 4,210,543	[1]	$ 4,102,177	[2]
Cost	3,742,689	3,742,689	[3]	$ 3,742,689	3,742,689	[3]	$ 3,773,752	[4]
Investment Owned, At Fair Value \| Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage				100%			100%
Investment Owned, At Cost \| Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage				100%			100%
Affiliated Entity \| External Investment Manager
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Expenses allocated	$ 5,700	$ 3,500		$ 10,700	$ 6,300
Short-term portfolio investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of investments \| investment							1
Short-term portfolio investments \| Maximum \| Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term				1 year
LMM portfolio investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of portfolio companies \| company	79			79			78
Fair value	$ 2,170,200			$ 2,170,200			$ 2,060,500
Cost	1,720,900			$ 1,720,900			$ 1,719,900
LMM portfolio investments \| Investment Owned, At Fair Value \| Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage				52%	54%
LMM portfolio investments \| Debt \| Investment Owned, At Cost \| Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage				72%			73.70%
LMM portfolio investments \| Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Annual revenues				$ 10,000
Investments	5,000			$ 5,000
LMM portfolio investments \| Minimum \| Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term				5 years
LMM portfolio investments \| Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Annual revenues				$ 150,000
Investments	$ 75,000			$ 75,000
LMM portfolio investments \| Maximum \| Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term				7 years
Private Loan portfolio investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of portfolio companies \| company	88			88			85
Fair value	$ 1,499,300			$ 1,499,300			$ 1,471,500
Cost	1,519,900			$ 1,519,900			$ 1,500,300
Private Loan portfolio investments \| Investment Owned, At Fair Value \| Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage				49%	44%
Private Loan portfolio investments \| Debt \| Investment Owned, At Cost \| Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage				96.10%			97.10%
Private Loan portfolio investments \| Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	10,000			$ 10,000
Private Loan portfolio investments \| Minimum \| Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term				3 years
Private Loan portfolio investments \| Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	$ 75,000			$ 75,000
Private Loan portfolio investments \| Maximum \| Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term				7 years
Middle Market portfolio investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of portfolio companies \| company	28			28			31
Fair value	$ 295,900			$ 295,900			$ 329,100
Cost	352,900			$ 352,900			$ 401,700
Middle Market portfolio investments \| Debt \| Investment Owned, At Cost \| Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage				92.90%			93.80%
Middle Market portfolio investments \| Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Annual revenues				$ 150,000
Investments	3,000			$ 3,000
Middle Market portfolio investments \| Minimum \| Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term				3 years
Middle Market portfolio investments \| Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Annual revenues				$ 1,500,000
Investments	$ 25,000			$ 25,000
Middle Market portfolio investments \| Maximum \| Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term				7 years
Other Portfolio investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of portfolio companies \| entity	15			15			14
Fair value	$ 111,200			$ 111,200			$ 116,300
Cost	119,400			$ 119,400			$ 120,400
Other Portfolio investments \| Investment Owned, At Fair Value \| Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage				2.60%			2.80%
Other Portfolio investments \| Investment Owned, At Cost \| Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage				3.20%			3.20%
Other Portfolio investments \| Minimum \| Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term				5 years
Other Portfolio investments \| Maximum \| Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment term				10 years
External Investment Manager
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	134,000			$ 134,000			$ 122,900
Cost	$ 29,500			$ 29,500			$ 29,500
External Investment Manager \| Investment Owned, At Fair Value \| Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage				3.20%			3%
External Investment Manager \| Investment Owned, At Cost \| Investment Type Concentration Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage				0.80%			0.80%

[1] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.

FAIR VALUE HIERARCHY FOR INVE_4

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Level 3 Portfolio Investments (Details) $ in Thousands	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)		Jun. 30, 2022 USD ($)	[2]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Level 3 investments	$ 4,210,543	$ 4,102,177	[1]	$ 4,210,543
Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Level 3 investments	$ 4,210,543	$ 4,100,273
Significant Unobservable Inputs (Level 3) \| EBITDA multiple, outlier \| Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	2	2
Significant Unobservable Inputs (Level 3) \| EBITDA multiple, outlier \| Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	15.7	15.7
Significant Unobservable Inputs (Level 3) \| Risk adjusted discount factor, outlier \| Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	0.038	0.038
Significant Unobservable Inputs (Level 3) \| Risk adjusted discount factor, outlier \| Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	0.335	0.433
Significant Unobservable Inputs (Level 3) \| Equity investments \| Discounted cash flow
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Level 3 investments	$ 1,279,510	$ 1,172,077
Significant Unobservable Inputs (Level 3) \| Equity investments \| Discounted cash flow \| WACC \| Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	0.092	0.094
Significant Unobservable Inputs (Level 3) \| Equity investments \| Discounted cash flow \| WACC \| Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	0.223	0.225
Significant Unobservable Inputs (Level 3) \| Equity investments \| Discounted cash flow \| WACC \| Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	0.144	0.145
Significant Unobservable Inputs (Level 3) \| Equity investments \| Discounted cash flow \| WACC \| Median
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	0.151	0.154
Significant Unobservable Inputs (Level 3) \| Equity investments \| Market comparable / Enterprise value \| EBITDA multiple \| Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	4.5	4.3
Significant Unobservable Inputs (Level 3) \| Equity investments \| Market comparable / Enterprise value \| EBITDA multiple \| Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	8.4	8.3
Significant Unobservable Inputs (Level 3) \| Equity investments \| Market comparable / Enterprise value \| EBITDA multiple \| Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	6.7	6.7
Significant Unobservable Inputs (Level 3) \| Equity investments \| Market comparable / Enterprise value \| EBITDA multiple \| Median
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	6.1	6
Significant Unobservable Inputs (Level 3) \| Debt investments \| Discounted cash flow
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Level 3 investments	$ 2,718,508	$ 2,663,958
Significant Unobservable Inputs (Level 3) \| Debt investments \| Discounted cash flow \| Risk adjusted discount factor \| Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	0.061	0.057
Significant Unobservable Inputs (Level 3) \| Debt investments \| Discounted cash flow \| Risk adjusted discount factor \| Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	0.168	0.157
Significant Unobservable Inputs (Level 3) \| Debt investments \| Discounted cash flow \| Risk adjusted discount factor \| Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	0.104	0.100
Significant Unobservable Inputs (Level 3) \| Debt investments \| Discounted cash flow \| Risk adjusted discount factor \| Median
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	0.110	0.103
Significant Unobservable Inputs (Level 3) \| Debt investments \| Discounted cash flow \| Expected principal recovery percentage \| Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	0	0
Significant Unobservable Inputs (Level 3) \| Debt investments \| Discounted cash flow \| Expected principal recovery percentage \| Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	1	1
Significant Unobservable Inputs (Level 3) \| Debt investments \| Discounted cash flow \| Expected principal recovery percentage \| Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	0.997	0.994
Significant Unobservable Inputs (Level 3) \| Debt investments \| Discounted cash flow \| Expected principal recovery percentage \| Median
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	1	1
Significant Unobservable Inputs (Level 3) \| Debt investments \| Market approach
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total Level 3 investments	$ 212,525	$ 264,238
Significant Unobservable Inputs (Level 3) \| Debt investments \| Market approach \| Third-party quote \| Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	4	5.6
Significant Unobservable Inputs (Level 3) \| Debt investments \| Market approach \| Third-party quote \| Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	97.5	98.5
Significant Unobservable Inputs (Level 3) \| Debt investments \| Market approach \| Third-party quote \| Weighted Average
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	88.4	87
Significant Unobservable Inputs (Level 3) \| Debt investments \| Market approach \| Third-party quote \| Median
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement input	94	91.4

[1] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.

FAIR VALUE HIERARCHY FOR INVE_5

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Changes in Fair Value of Level 3 Portfolio Investments (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 4,100,273	$ 3,559,837
Transfers Into Level 3 Hierarchy	0	0
Redemptions/ Repayments	(456,249)	(378,653)
New Investments	427,160	542,810
Other	0	0
Ending balance	4,210,543	3,715,909
Investments \| Net Changes from Unrealized to Realized
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (loss) included in earnings	104,290	1,679
Investments \| Net Unrealized Appreciation (Depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (loss) included in earnings	35,069	(9,764)
Debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	2,928,196	2,509,568
Transfers Into Level 3 Hierarchy	0	0
Redemptions/ Repayments	(421,050)	(351,315)
New Investments	376,859	508,045
Other	(29,746)	(1,333)
Ending balance	2,931,033	2,608,016
Debt \| Net Changes from Unrealized to Realized
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (loss) included in earnings	100,164	3,656
Debt \| Net Unrealized Appreciation (Depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (loss) included in earnings	(23,390)	(60,605)
Equity
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	1,166,643	1,043,709
Transfers Into Level 3 Hierarchy	0	0
Redemptions/ Repayments	(35,199)	(27,338)
New Investments	48,210	34,765
Other	32,322	1,333
Ending balance	1,272,460	1,101,943
Equity \| Net Changes from Unrealized to Realized
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (loss) included in earnings	4,126	(1,977)
Equity \| Net Unrealized Appreciation (Depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (loss) included in earnings	56,358	51,451
Equity Warrant
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	5,434	6,560
Transfers Into Level 3 Hierarchy	0	0
Redemptions/ Repayments	0	0
New Investments	2,091	0
Other	(2,576)	0
Ending balance	7,050	5,950
Equity Warrant \| Net Changes from Unrealized to Realized
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (loss) included in earnings	0	0
Equity Warrant \| Net Unrealized Appreciation (Depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (loss) included in earnings	$ 2,101	$ (610)

FAIR VALUE HIERARCHY FOR INVE_6

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022		Jun. 30, 2022	[2]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	$ 4,210,543	$ 4,102,177	[1]	$ 4,210,543
Fair Value, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	4,210,543	4,102,177
Fair Value, Recurring \| LMM portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	2,170,226	2,060,459
Fair Value, Recurring \| Private Loan portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	1,499,309	1,471,466
Fair Value, Recurring \| Middle Market portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	295,854	329,119
Fair Value, Recurring \| Other Portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	111,184	116,299
Fair Value, Recurring \| External Investment Manager
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	133,970	122,930
Fair Value, Recurring \| Short-term portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:		1,904
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring \| LMM portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring \| Private Loan portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring \| Middle Market portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring \| Other Portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring \| External Investment Manager
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring \| Short-term portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:		0
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	1,904
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring \| LMM portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring \| Private Loan portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring \| Middle Market portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring \| Other Portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring \| External Investment Manager
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	0	0
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring \| Short-term portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:		1,904
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	4,210,543	4,100,273
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	4,210,543	4,100,273
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| LMM portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	2,170,226	2,060,459
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| Private Loan portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	1,499,309	1,471,466
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| Middle Market portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	295,854	329,119
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| Other Portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	111,184	116,299
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| External Investment Manager
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:	$ 133,970	122,930
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| Short-term portfolio investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value:		$ 0

[1] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.

FAIR VALUE HIERARCHY FOR INVE_7

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Schedule of Investments (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2023 USD ($) company	Dec. 31, 2022 USD ($) company		Jun. 30, 2022 USD ($)
Summary of Investment Holdings [Line Items]
Fair value	$ 4,210,543	$ 4,102,177	[1]	$ 4,210,543	[2]
Cost	$ 3,742,689	$ 3,773,752	[3]	$ 3,742,689	[4]
Investment Owned, At Cost \| Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	100%	100%
Non-accrual Status \| Investment Owned, At Cost \| Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	1.70%	3.70%
Equity \| Investment Owned, At Cost \| Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	15.50%	14.20%
First lien debt \| Investment Owned, At Cost \| Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	83.80%	85%
LMM portfolio investments
Summary of Investment Holdings [Line Items]
Number of portfolio companies \| company	79	78
Fair value	$ 2,170,200	$ 2,060,500
Cost	$ 1,720,900	$ 1,719,900
Weighted-average annual effective yield	12.90%	12.30%
Average EBITDA	$ 8,000	$ 8,000
Diluted equity ownership percentage	40%	41%
Investment company, number of companies within portfolio excluded from EBITDA calculation \| company	2	3
LMM portfolio investments \| Non-accrual Status
Summary of Investment Holdings [Line Items]
Weighted-average annual effective yield	12.80%	11.60%
LMM portfolio investments \| Debt \| Investment Owned, At Cost \| Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	72%	73.70%
LMM portfolio investments \| Equity \| Investment Owned, At Cost \| Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	28%	26.30%
LMM portfolio investments \| First lien debt \| Investment Owned, At Cost \| Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	99.20%	99.10%
Private Loan portfolio investments
Summary of Investment Holdings [Line Items]
Number of portfolio companies \| company	88	85
Fair value	$ 1,499,300	$ 1,471,500
Cost	$ 1,519,900	$ 1,500,300
Weighted-average annual effective yield	12.60%	11.60%
Average EBITDA	$ 30,500	$ 38,100
Investment company, number of companies within portfolio excluded from EBITDA calculation \| company	2	2
Private Loan portfolio investments \| Non-accrual Status
Summary of Investment Holdings [Line Items]
Weighted-average annual effective yield	12.30%	11.20%
Private Loan portfolio investments \| Debt \| Investment Owned, At Cost \| Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	96.10%	97.10%
Private Loan portfolio investments \| Equity \| Investment Owned, At Cost \| Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	3.90%	2.90%
Private Loan portfolio investments \| First lien debt \| Investment Owned, At Cost \| Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	99.50%	99.60%
Middle Market portfolio investments
Summary of Investment Holdings [Line Items]
Number of portfolio companies \| company	28	31
Fair value	$ 295,900	$ 329,100
Cost	$ 352,900	$ 401,700
Weighted-average annual effective yield	11.80%	11%
Average EBITDA	$ 67,600	$ 68,700
Middle Market portfolio investments \| Non-accrual Status
Summary of Investment Holdings [Line Items]
Weighted-average annual effective yield	10.80%	10.30%
Middle Market portfolio investments \| Debt \| Investment Owned, At Cost \| Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	92.90%	93.80%
Middle Market portfolio investments \| Equity \| Investment Owned, At Cost \| Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	7.10%	6.20%
Middle Market portfolio investments \| First lien debt \| Investment Owned, At Cost \| Investment Type Concentration Risk
Summary of Investment Holdings [Line Items]
Concentration risk, percentage	99.20%	98.80%

[1] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.

FAIR VALUE HIERARCHY FOR INVE_8

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Percentage of Portfolio Investments by Type of Investment (Details) - Investment Type Concentration Risk	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Investment Owned, At Cost
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	100%	100%
Investment Owned, At Cost \| First lien debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	83.80%	85%
Investment Owned, At Cost \| Equity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	15.50%	14.20%
Investment Owned, At Cost \| Second lien debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.30%	0.30%
Investment Owned, At Cost \| Equity warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.20%	0.20%
Investment Owned, At Cost \| Other
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.20%	0.30%
Investment Owned, At Fair Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	100%	100%
Investment Owned, At Fair Value \| First lien debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	73.30%	75.20%
Investment Owned, At Fair Value \| Equity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	25.90%	24.10%
Investment Owned, At Fair Value \| Second lien debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.40%	0.30%
Investment Owned, At Fair Value \| Equity warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.20%	0.10%
Investment Owned, At Fair Value \| Other
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.20%	0.30%

FAIR VALUE HIERARCHY FOR INVE_9

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Percentage of Portfolio Investments by Geographical Regions (Details) - Geographic Concentration Risk	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Investment Owned, At Cost
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	100%	100%
Investment Owned, At Cost \| West
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	25.60%	28.50%
Investment Owned, At Cost \| Northeast
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	21.60%	19%
Investment Owned, At Cost \| Southwest
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	19.30%	20.10%
Investment Owned, At Cost \| Midwest
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	16%	16.30%
Investment Owned, At Cost \| Southeast
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	15.10%	14%
Investment Owned, At Cost \| Other Non-United States
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.70%	1.50%
Investment Owned, At Cost \| Canada
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.70%	0.60%
Investment Owned, At Fair Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	100%	100%
Investment Owned, At Fair Value \| West
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	26.20%	28.70%
Investment Owned, At Fair Value \| Northeast
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	21%	18.80%
Investment Owned, At Fair Value \| Southwest
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	21.30%	21.40%
Investment Owned, At Fair Value \| Midwest
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	16.30%	16.60%
Investment Owned, At Fair Value \| Southeast
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	13%	12.40%
Investment Owned, At Fair Value \| Other Non-United States
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.60%	1.50%
Investment Owned, At Fair Value \| Canada
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.60%	0.60%

FAIR VALUE HIERARCHY FOR INV_10

FAIR VALUE HIERARCHY FOR INVESTMENTS—PORTFOLIO COMPOSITION - Percentage of Portfolio Investments by Industry Sector (Details) - Industry Concentration Risk	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Investment Owned, At Cost
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	100%	100%
Investment Owned, At Cost \| Internet Software & Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	8.90%	8%
Investment Owned, At Cost \| Machinery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	7.20%	7.40%
Investment Owned, At Cost \| Commercial Services & Supplies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	6.10%	6.70%
Investment Owned, At Cost \| Construction & Engineering
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	5.70%	5.80%
Investment Owned, At Cost \| Health Care Providers & Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	5%	4.70%
Investment Owned, At Cost \| Diversified Consumer Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	4.90%	4.50%
Investment Owned, At Cost \| IT Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	4.90%	3.30%
Investment Owned, At Cost \| Professional Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	4.50%	4.20%
Investment Owned, At Cost \| Distributors
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	4.20%	5.10%
Investment Owned, At Cost \| Textiles, Apparel & Luxury Goods
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.30%	1.90%
Investment Owned, At Cost \| Leisure Equipment & Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.10%	4.50%
Investment Owned, At Cost \| Energy Equipment & Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.10%	3.70%
Investment Owned, At Cost \| Tobacco
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.10%	3.10%
Investment Owned, At Cost \| Computers & Peripherals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.70%	2.20%
Investment Owned, At Cost \| Specialty Retail
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.50%	3.20%
Investment Owned, At Cost \| Media
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.40%	2.40%
Investment Owned, At Cost \| Software
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2%	1.90%
Investment Owned, At Cost \| Building Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.80%	1.90%
Investment Owned, At Cost \| Aerospace & Defense
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.80%	2.30%
Investment Owned, At Cost \| Containers & Packaging
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.70%	2.60%
Investment Owned, At Cost \| Diversified Telecommunication Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.70%	1.90%
Investment Owned, At Cost \| Auto Components
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.60%	1.70%
Investment Owned, At Cost \| Food Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.60%	1.60%
Investment Owned, At Cost \| Electronic Equipment, Instruments & Components
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.60%	1.60%
Investment Owned, At Cost \| Electrical Equipment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.50%	1%
Investment Owned, At Cost \| Communications Equipment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.50%	1.80%
Investment Owned, At Cost \| Diversified Financial Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.50%	1.50%
Investment Owned, At Cost \| Internet & Catalog Retail
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.30%	1.30%
Investment Owned, At Cost \| Health Care Equipment & Supplies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.30%	1.30%
Investment Owned, At Cost \| Food & Staples Retailing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.10%	1.20%
Investment Owned, At Cost \| Hotels, Restaurants & Leisure
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.10%	1.10%
Investment Owned, At Cost \| Chemicals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1%	1.10%
Investment Owned, At Cost \| Household Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1%	0.40%
Investment Owned, At Cost \| Other
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.30%	3.10%
Investment Owned, At Fair Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	100%	100%
Investment Owned, At Fair Value \| Internet Software & Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	7.40%	6.80%
Investment Owned, At Fair Value \| Machinery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	8.30%	8.40%
Investment Owned, At Fair Value \| Commercial Services & Supplies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	5.20%	6.10%
Investment Owned, At Fair Value \| Construction & Engineering
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	5.60%	5.70%
Investment Owned, At Fair Value \| Health Care Providers & Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	4.70%	4.30%
Investment Owned, At Fair Value \| Diversified Consumer Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	7.10%	6.80%
Investment Owned, At Fair Value \| IT Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	4.40%	3.10%
Investment Owned, At Fair Value \| Professional Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	5.10%	3.80%
Investment Owned, At Fair Value \| Distributors
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	4.50%	5.50%
Investment Owned, At Fair Value \| Textiles, Apparel & Luxury Goods
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.80%	1.80%
Investment Owned, At Fair Value \| Leisure Equipment & Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.80%	4%
Investment Owned, At Fair Value \| Energy Equipment & Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.70%	2.70%
Investment Owned, At Fair Value \| Tobacco
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.30%	3.40%
Investment Owned, At Fair Value \| Computers & Peripherals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.80%	3%
Investment Owned, At Fair Value \| Specialty Retail
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	3.10%	3.50%
Investment Owned, At Fair Value \| Media
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.90%	3%
Investment Owned, At Fair Value \| Software
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	2.10%	2.10%
Investment Owned, At Fair Value \| Building Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.60%	1.90%
Investment Owned, At Fair Value \| Aerospace & Defense
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.70%	2.20%
Investment Owned, At Fair Value \| Containers & Packaging
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.90%	2.80%
Investment Owned, At Fair Value \| Diversified Telecommunication Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.50%	1.80%
Investment Owned, At Fair Value \| Auto Components
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.50%	1.60%
Investment Owned, At Fair Value \| Food Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.70%	1.80%
Investment Owned, At Fair Value \| Electrical Equipment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.60%	1%
Investment Owned, At Fair Value \| Diversified Financial Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.40%	1.70%
Investment Owned, At Fair Value \| Internet & Catalog Retail
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.20%	1.30%
Investment Owned, At Fair Value \| Construction Materials
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.10%	1%
Investment Owned, At Fair Value \| Air Freight & Logistics
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1.10%	0.90%
Investment Owned, At Fair Value \| Health Care Equipment & Supplies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	1%	1%
Investment Owned, At Fair Value \| Food & Staples Retailing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.80%	1.10%
Investment Owned, At Fair Value \| Chemicals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	0.90%	1.10%
Investment Owned, At Fair Value \| Other
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Concentration risk, percentage	5.20%	4.80%

EXTERNAL INVESTMENT MANAGER - N

EXTERNAL INVESTMENT MANAGER - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Related Party Transaction [Line Items]
Net investment income	$ 85,728	$ 54,726	$ 166,694	$ 106,939
External Investment Manager
Related Party Transaction [Line Items]
Net investment income	$ 8,500	$ 5,200	$ 16,600	$ 10,300
Affiliated Entity \| External Investment Manager \| Advisory Agreement
Related Party Transaction [Line Items]
Management and service fees (in percentage)			1.75%
Management and service fees, incentive rate			20%

EXTERNAL INVESTMENT MANAGER - B

EXTERNAL INVESTMENT MANAGER - Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Investment Company, Nonconsolidated Subsidiary [Line Items]
Total assets	$ 4,420,238		$ 4,241,885
Dividend payable to MSCC and its subsidiaries	18,729		17,676
Equity	2,254,948	$ 2,172,922	2,108,586	$ 1,865,163	$ 1,873,654	$ 1,788,846
Total liabilities and net assets	4,420,238		4,241,885
External Investment Manager
Investment Company, Nonconsolidated Subsidiary [Line Items]
Accounts receivable to MSCC and its subsidiaries	10,416		8,130
Intangible Asset	29,500		29,500
Total assets	39,916		37,630
Accounts payable to MSCC and its subsidiaries	7,557		4,455
Dividend payable to MSCC and its subsidiaries	2,859		3,675
Equity	29,500		29,500
Total liabilities and net assets	$ 39,916		$ 37,630

EXTERNAL INVESTMENT MANAGER - S

EXTERNAL INVESTMENT MANAGER - Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Investment Company, Nonconsolidated Subsidiary [Line Items]
Tax expense	$ (8,647)		$ (10,320)		$ (16,760)	$ (15,417)
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS	106,516	$ 79,592	14,749	$ 65,203	186,107	79,953
External Investment Manager
Investment Company, Nonconsolidated Subsidiary [Line Items]
Total revenues	9,358		5,664		18,283	11,396
Salaries, share-based compensation and other personnel costs	(4,897)		(2,653)		(9,165)	(4,913)
Other G&A expenses	(791)		(809)		(1,520)	(1,366)
Total allocated expenses	(5,688)		(3,462)		(10,685)	(6,279)
Pre-tax income	3,670		2,202		7,598	5,117
Tax expense	(811)		(492)		(1,683)	(1,134)
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS	2,859		1,710		5,915	3,983
External Investment Manager \| Management fee income
Investment Company, Nonconsolidated Subsidiary [Line Items]
Total revenues	5,544		5,421		11,014	10,865
External Investment Manager \| Incentive fees
Investment Company, Nonconsolidated Subsidiary [Line Items]
Total revenues	3,663		90		6,967	227
External Investment Manager \| Administrative services fees
Investment Company, Nonconsolidated Subsidiary [Line Items]
Total revenues	$ 151		$ 153		$ 302	$ 304

DEBT - Schedule of Debt (Detail

DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Outstanding Balance	$ 2,030,000	$ 2,007,000
Unamortized Debt Issuance (Costs)/ Premiums	(8,498)	(7,898)
Recorded Value	2,021,502	1,999,102
Estimated Fair Value	1,907,432	1,882,810
July 2026 Notes \| Unsecured Notes
Debt Instrument [Line Items]
Outstanding Balance	500,000	500,000
Unamortized Debt Issuance (Costs)/ Premiums	(1,601)	(1,864)
Recorded Value	498,399	498,136
Estimated Fair Value	440,345	434,250
May 2024 Notes \| Unsecured Notes
Debt Instrument [Line Items]
Outstanding Balance	450,000	450,000
Unamortized Debt Issuance (Costs)/ Premiums	454	727
Recorded Value	450,454	450,727
Estimated Fair Value	442,926	444,749
SBIC Debentures \| Unsecured Notes
Debt Instrument [Line Items]
Outstanding Balance	350,000	350,000
Unamortized Debt Issuance (Costs)/ Premiums	(6,057)	(6,086)
Recorded Value	343,943	343,914
Estimated Fair Value	290,232	290,204
December 2025 Notes \| Unsecured Notes
Debt Instrument [Line Items]
Outstanding Balance	150,000	100,000
Unamortized Debt Issuance (Costs)/ Premiums	(1,294)	(675)
Recorded Value	148,706	99,325
Estimated Fair Value	153,929	106,607
Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Recorded Value	580,000	607,000
Credit Facility \| Corporate Facility \| Line of Credit
Debt Instrument [Line Items]
Outstanding Balance	410,000	407,000
Unamortized Debt Issuance (Costs)/ Premiums	0	0
Recorded Value	410,000	407,000
Estimated Fair Value	410,000	407,000
Credit Facility \| SPV Facility \| Line of Credit
Debt Instrument [Line Items]
Outstanding Balance	170,000	200,000
Unamortized Debt Issuance (Costs)/ Premiums	0	0
Recorded Value	170,000	200,000
Estimated Fair Value	$ 170,000	$ 200,000

DEBT - Schedule of Interest Exp

DEBT - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Debt Instrument [Line Items]
Total Interest Expense	$ 26,754	$ 17,295	$ 51,752	$ 33,982
July 2026 Notes \| Unsecured Notes
Debt Instrument [Line Items]
Total Interest Expense	3,882	3,882	7,763	7,763
May 2024 Notes \| Unsecured Notes
Debt Instrument [Line Items]
Total Interest Expense	5,714	5,713	11,427	11,428
SBIC Debentures \| Unsecured Notes
Debt Instrument [Line Items]
Total Interest Expense	2,718	2,827	5,470	5,627
December 2025 Notes \| Unsecured Notes
Debt Instrument [Line Items]
Total Interest Expense	3,031	0	5,643	0
December 2022 Notes \| Unsecured Notes
Debt Instrument [Line Items]
Total Interest Expense	0	2,233	0	4,466
Credit Facility \| Corporate Facility \| Line of Credit
Debt Instrument [Line Items]
Total Interest Expense	7,898	2,640	14,508	4,698
Credit Facility \| SPV Facility \| Line of Credit
Debt Instrument [Line Items]
Total Interest Expense	$ 3,511	$ 0	$ 6,941	$ 0

DEBT - Corporate Facility (Deta

DEBT - Corporate Facility (Details) - Line of Credit - Revolving Credit Facility - Corporate Facility	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($) lender	Jun. 30, 2022	Jun. 30, 2023 USD ($) lender	Jun. 30, 2022
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 980,000,000		$ 980,000,000
Line of credit facility, number of lenders \| lender	18		18
Line of credit facility, maximum borrowing capacity including accordion feature			$ 1,400,000,000
Debt instrument, credit spread adjustment			0.10%
Line of credit facility, unused capacity, commitment fee percentage			0.25%
Interest rate	7.10%		7.10%
Average interest rate	7%	2.70%	6.70%	2.30%
Minimum \| SOFR
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate			1.875%
Minimum \| Prime Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate			0.875%
Maximum \| SOFR
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate			2%
Maximum \| Prime Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate			1%

DEBT - SPV Facility (Details)

DEBT - SPV Facility (Details)	1 Months Ended	3 Months Ended	6 Months Ended
DEBT - SPV Facility (Details)	Nov. 30, 2022 USD ($) lender	Jun. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($) lender
Line of Credit \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Commitment fee (in percentage)			3.40%
MSCC Funding I, LLC
Line of Credit Facility [Line Items]
Average interest rate		7.60%	7.40%
MSCC Funding I, LLC \| Line of Credit \| Revolving Credit Facility \| SPV Facility
Line of Credit Facility [Line Items]
Debt instrument, number of lenders \| lender	3			4
Line of credit facility	$ 240,000,000	$ 255,000,000	$ 255,000,000	$ 255,000,000
Line of credit facility, maximum borrowing capacity including accordion feature			$ 450,000,000
Commitment fee (in percentage)	35%
Interest rate		7.80%	7.80%
MSCC Funding I, LLC \| Line of Credit \| Revolving Credit Facility \| SPV Facility \| Minimum
Line of Credit Facility [Line Items]
Line of credit facility, unused capacity, commitment fee percentage	0.50%
MSCC Funding I, LLC \| Line of Credit \| Revolving Credit Facility \| SPV Facility \| Maximum
Line of Credit Facility [Line Items]
Line of credit facility, unused capacity, commitment fee percentage	0.75%
MSCC Funding I, LLC \| Line of Credit \| Revolving Credit Facility \| SPV Facility \| SOFR
Line of Credit Facility [Line Items]
Debt instrument, credit spread adjustment	0.10%
MSCC Funding I, LLC \| Line of Credit \| Revolving Credit Facility \| SPV Facility \| SOFR \| Reinvestment period
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	2.50%
MSCC Funding I, LLC \| Line of Credit \| Revolving Credit Facility \| SPV Facility \| SOFR \| First year amortization period
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	2.625%
MSCC Funding I, LLC \| Line of Credit \| Revolving Credit Facility \| SPV Facility \| SOFR \| Second year amortization period
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	2.75%

DEBT - SPV Facility Balance She

DEBT - SPV Facility Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022		Jun. 30, 2022		Mar. 31, 2022	Dec. 31, 2021
ASSETS
Investments at fair value:	$ 4,210,543		$ 4,102,177	[1]	$ 4,210,543	[2]
Investment, cost	3,742,689		3,773,752	[3]	3,742,689	[4]
Cash and cash equivalents	70,886		49,121
Interest and dividend receivable and other assets	117,749		82,731
Receivable for securities sold	13,959		381
Deferred financing costs (net of accumulated amortization of $426 and $141 as of June 30, 2023 and December 31, 2022, respectively)	7,101		7,475
Deferred financing costs, accumulated amortization	11,420		10,603
Total assets	4,420,238		4,241,885
LIABILITIES
Debt	2,021,502		1,999,102
Accounts payable and other liabilities	48,502		52,092
Interest payable	15,355		16,580
Total liabilities	2,165,290		2,133,299
NET ASSETS
Contributed capital	2,132,041		2,030,531
Total undistributed earnings	122,093		77,271
Total net assets	2,254,948	$ 2,172,922	2,108,586		1,865,163		$ 1,873,654	$ 1,788,846
Total liabilities and equity	4,420,238		4,241,885
MSCC Funding I, LLC
ASSETS
Cash and cash equivalents	8,200		10,838
Interest and dividend receivable and other assets	2,748		2,828
Accounts receivable to MSCC and its subsidiaries	0		556
Receivable for securities sold	0		369
Deferred financing costs (net of accumulated amortization of $426 and $141 as of June 30, 2023 and December 31, 2022, respectively)	2,568		2,630
Deferred financing costs, accumulated amortization	426		141
Total assets	334,145		333,728
LIABILITIES
Debt	170,000		200,000
Accounts payable and other liabilities	7,032		112
Interest payable	1,138		1,272
Total liabilities	178,170		201,384
NET ASSETS
Contributed capital	138,163		126,010
Total undistributed earnings	17,812		6,334
Total net assets	155,975		132,344
Total liabilities and equity	334,145		333,728
Non‑Control/Non‑Affiliate investments
ASSETS
Investments at fair value:	1,763,719		1,780,646	[1],[5]	1,763,719	[2],[6]
Investment, cost	1,825,669		1,867,414	[3],[5]	$ 1,825,669	[4],[6]
Non‑Control/Non‑Affiliate investments \| MSCC Funding I, LLC
ASSETS
Investments at fair value:	320,629		316,507
Investment, cost	$ 318,309		$ 314,752

[1] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.

DEBT - SPV Facility Statement o

DEBT - SPV Facility Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
INVESTMENT INCOME:
Interest, fee and dividend income	$ 127,583		$ 85,200		$ 247,838	$ 164,596
EXPENSES:
Interest	(26,754)		(17,295)		(51,752)	(33,982)
General and administrative	(4,514)		(4,238)		(8,591)	(7,464)
Total expenses	(41,855)		(30,474)		(81,144)	(57,657)
NET INVESTMENT INCOME	85,728		54,726		166,694	106,939
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation	104,941		(24,593)		140,059	(9,841)
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS	106,516	$ 79,592	14,749	$ 65,203	186,107	79,953
MSCC Funding I, LLC
INVESTMENT INCOME:
Interest, fee and dividend income	9,873				18,590
EXPENSES:
Interest	(3,512)				(6,940)
Management fee income	(410)				(686)
General and administrative	(19)				(51)
Total expenses	(3,941)				(7,677)
NET INVESTMENT INCOME	5,932				10,913
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation	1,956				565
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS	7,888				11,478
Non‑Control/Non‑Affiliate investments
INVESTMENT INCOME:
Interest, fee and dividend income	58,605		36,499		112,542	69,401
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation	40,631		$ (31,146)		25,447	$ (27,714)
Non‑Control/Non‑Affiliate investments \| MSCC Funding I, LLC
INVESTMENT INCOME:
Interest, fee and dividend income	9,873				18,590
NET UNREALIZED APPRECIATION (DEPRECIATION):
Total net unrealized appreciation	$ 1,956				$ 565

DEBT - Notes_Due and SBIC Deben

DEBT - Notes Due and SBIC Debentures (Details)	1 Months Ended						6 Months Ended
DEBT - Notes Due and SBIC Debentures (Details)	Oct. 31, 2021 USD ($)	Jan. 31, 2021 USD ($)	Jul. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Apr. 30, 2019 USD ($)	Nov. 30, 2017 USD ($)	Jun. 30, 2023 USD ($)	Feb. 28, 2023 USD ($)	Dec. 31, 2022 USD ($) agency
Debt Instrument [Line Items]
Debt instrument, payable							$ 2,030,000,000		$ 2,007,000,000
Debt instrument							2,021,502,000		$ 1,999,102,000
Unsecured Notes
Debt Instrument [Line Items]
Debt instrument, weighted-average annual interest rate									2.90%
July 2026 Notes \| Unsecured Notes
Debt Instrument [Line Items]
Debt instrument, face amount	$ 200,000,000	$ 300,000,000					500,000,000		$ 500,000,000
Debt instrument, interest rate, stated percentage		3%
Debt instrument, issuance price, percentage	101.741%	99.004%
Debt instrument, payable							500,000,000		500,000,000
Debt instrument							498,399,000		498,136,000
May 2024 Notes \| Unsecured Notes
Debt Instrument [Line Items]
Debt instrument, face amount			$ 125,000,000	$ 75,000,000	$ 250,000,000		450,000,000		450,000,000
Debt instrument, interest rate, stated percentage					5.20%
Debt instrument, issuance price, percentage			102.70%	105%	99.125%
Debt instrument, payable							450,000,000		450,000,000
Debt instrument							450,454,000		450,727,000
SBIC Debentures \| Unsecured Notes
Debt Instrument [Line Items]
Debt instrument, face amount							350,000,000		350,000,000
Debt instrument, payable							$ 350,000,000		350,000,000
Debt instrument, term							10 years
Debt instrument, weighted-average annual interest rate							3%
Debt instrument, remaining term							5 years 1 month 6 days
Debt instrument							$ 343,943,000		343,914,000
SBIC Debentures \| Unsecured Notes \| Maximum
Debt Instrument [Line Items]
Debt instrument, payable							350,000,000
SBIC Debentures \| Unsecured Notes \| MSMF
Debt Instrument [Line Items]
Debt instrument, face amount							175,000,000
Debt instrument							171,800,000
Debt instrument, unamortized debt issuance costs							3,200,000
SBIC Debentures \| Unsecured Notes \| MSC III
Debt Instrument [Line Items]
Debt instrument, face amount							175,000,000
Debt instrument							172,200,000
Debt instrument, unamortized debt issuance costs							2,800,000
December 2025 Notes \| Unsecured Notes
Debt Instrument [Line Items]
Debt instrument, face amount							150,000,000		100,000,000
Debt instrument, payable							150,000,000		100,000,000
Debt instrument							$ 148,706,000		$ 99,325,000
Debt instrument, credit rating, below investment grade event, percentage of agencies									67%
Debt instrument, secured debt ratio event									0.35
December 2025 Notes \| Unsecured Notes \| Minimum
Debt Instrument [Line Items]
Debt instrument, credit rating, below investment grade rating, number of agencies \| agency									1
December 2025 Notes \| Unsecured Notes \| Maximum
Debt Instrument [Line Items]
Debt instrument, credit rating, below investment grade rating, number of agencies \| agency									2
December 2025 Series A Notes \| Unsecured Notes
Debt Instrument [Line Items]
Debt instrument, face amount									$ 100,000,000
Debt instrument, interest rate, stated percentage									7.84%
December 2025 Series B Notes \| Unsecured Notes
Debt Instrument [Line Items]
Debt instrument, face amount								$ 50,000,000
Debt instrument, interest rate, stated percentage								7.53%
December 2022 Notes \| Unsecured Notes
Debt Instrument [Line Items]
Debt instrument, face amount						$ 185,000,000
Debt instrument, interest rate, stated percentage						4.50%
Debt instrument, issuance price, percentage						99.16%

FINANCIAL HIGHLIGHTS (Details)

FINANCIAL HIGHLIGHTS (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Investment Company, Financial Highlights [Roll Forward]
NAV at the beginning of the period (in dollars per share)	$ 26.86	$ 25.29
Net investment income (in dollars per share)	2.08	1.47
Net realized loss (in dollars per share)	(1.30)	(0.02)
Net unrealized appreciation (depreciation) (in dollars per share)	1.75	(0.14)
Income tax benefit (provision) (in dollars per share)	(0.21)	(0.21)
Net increase in net assets resulting from operations (in dollars per share)	2.32	1.10
Dividends paid from net investment income (in dollars per share)	(1.75)	(1.44)
Dividends paid (in dollars per share)	(1.75)	(1.44)
Impact of the net change in monthly dividends declared prior to the end of the period and paid in the subsequent period (in dollars per share)	(0.01)	0
Accretive effect of stock offerings (issuing shares above NAV per share) (in dollars per share)	0.31	0.48
Accretive effect of DRIP issuance (issuing shares above NAV per share) (in dollars per share)	0.05	0.05
Other (in dollars per share)	(0.09)	(0.11)
NAV at the end of the period (in dollars per share)	27.69	25.37
Market value at the end of the period (in dollars per share)	$ 40.03	$ 38.53
Shares outstanding at the end of the period (in shares)	81,431,006	73,517,558
NAV at end of period	$ 2,254,948	$ 1,865,163	$ 2,172,922	$ 2,108,586	$ 1,873,654	$ 1,788,846
Average NAV	2,178,819	1,842,554
Average outstanding debt	$ 1,991,714	$ 1,793,857
Investment Company, Ratio To Average Net Assets [Abstract]
Ratio of total expenses, including income tax expense, to average NAV	2.32%	3.97%
Ratio of operating expenses to average NAV	1.92%	3.13%
Ratio of operating expenses, excluding interest expense, to average NAV	0.69%	1.28%
Ratio of net investment income to average NAV	3.93%	5.80%
Portfolio turnover ratio	7.76%	10.48%
Total investment return	13.26%	(10.96%)
Total return based on change in NAV	5.05%	4.47%
Related Party \| External Investment Manager
Investment Company, Ratio To Average Net Assets [Abstract]
Total expenses	$ 10,700	$ 6,300

DIVIDENDS, DISTRIBUTIONS AND _3

DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Monthly dividend, per share (in dollars per share)	$ 0.225
Dividends	$ 54.3	$ 47.1	$ 107.9	$ 93.1
Dividends, per share (in dollars per share)	$ 0.675	$ 0.645	$ 1.35	$ 1.29
Supplemental dividend	$ 18.2	$ 5.5	$ 32.2	$ 10.9
Supplemental dividend (in dollars per share)	$ 0.225	$ 0.075	$ 0.40	$ 0.15
Net deferred tax liability	$ 61.2		$ 61.2		$ 47.8

DIVIDENDS, DISTRIBUTIONS AND _4

DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME - Reconciliation to Taxable Income and to Total Distributions Declared to Common Stockholders (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Net increase in net assets resulting from operations	$ 106,516	$ 79,592	$ 14,749	$ 65,203	$ 186,107	$ 79,953
Book-tax difference from share-based compensation expense					(7,646)	(6,906)
Net unrealized (appreciation) depreciation					(140,059)	9,841
Income tax provision	$ 8,647		$ 10,320		16,760	15,417
Pre-tax book (income) loss not consolidated for tax purposes					44,328	(9,249)
Book income and tax income differences, including debt origination, structuring fees, dividends, realized gains and changes in estimates					45,352	13,568
Estimated taxable income					144,842	102,624
Taxable income earned in prior year and carried forward for distribution in current year					49,216	50,834
Taxable income earned prior to period end and carried forward for distribution next period					(71,501)	(64,509)
Dividend payable as of period end and paid in the following period					18,729	15,673
Total distributions accrued or paid to common stockholders					$ 141,286	$ 104,622

DIVIDENDS, DISTRIBUTIONS AND _5

DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME - Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Current tax expense:
Federal	$ 158	$ 64	$ 298	$ 115
State	433	71	1,289	614
Excise	1,080	674	1,820	1,389
Total current tax expense	1,671	809	3,407	2,118
Deferred tax expense:
Federal	6,444	7,166	12,250	9,973
State	532	2,345	1,103	3,326
Total deferred tax expense	6,976	9,511	13,353	13,299
Total income tax provision	$ 8,647	$ 10,320	$ 16,760	$ 15,417

COMMON STOCK (Details)

COMMON STOCK (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	6 Months Ended		12 Months Ended
	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Subsidiary, Sale of Stock [Line Items]
Proceeds from public offering of common stock, net of offering costs		$ 84,100	$ 89,155
At-The-Market Offerings
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)		2,148,490		5,407,382
Proceeds from public offering of common stock, net of offering costs		$ 84,900		$ 212,400
Sale of stock, consideration received on transaction, net		$ 84,100		$ 209,900
Sale of stock, shares not yet settled (in shares)		404,330
Sale of stock, shares authorized under agreement (in shares)	15,000,000
Sale of stock, remaining number of shares authorized to be purchased (in shares)		8,314,194
At-The-Market Offerings \| Weighted Average
Subsidiary, Sale of Stock [Line Items]
Sale of stock, price per share (in dollars per share)		$ 39.52		$ 39.29
Public Equity Offering
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)				1,345,500
Sale of stock, price per share (in dollars per share)				$ 42.85
Sale of stock, consideration received on transaction, net				$ 55,100
Over-Allotment Option
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)				175,500

DIVIDEND REINVESTMENT PLAN (Det

DIVIDEND REINVESTMENT PLAN (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Equity [Abstract]
DRIP participation	$ 6,880	$ 7,808	$ 5,000	$ 4,813	$ 14,688	$ 9,813
Shares issued for DRIP (in shares)					374,173	246,199

SHARE-BASED COMPENSATION - Narr

SHARE-BASED COMPENSATION - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share‑based compensation	$ 4,087	$ 3,596	$ 8,187	$ 6,414
Share-based payment arrangement, nonvested award, vested fair value			$ 15,600	10,300
Restricted Stock
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period			3 years
Share‑based compensation	4,100	$ 3,600	$ 8,200	$ 6,400
Share-based payment arrangement, nonvested award, excluding option, cost not yet recognized, amount	$ 34,400		$ 34,400
Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition			2 years 8 months 12 days
Restricted Stock \| Main Street Capital Corporation 2022 Equity and Incentive Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period			3 years

SHARE-BASED COMPENSATION - Rest

SHARE-BASED COMPENSATION - Restricted Stock Authorized and Available for Issuance (Details) - Restricted Stock	6 Months Ended
	Jun. 30, 2023 shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Less net restricted stock granted (in shares)	(544,533)
Main Street Capital Corporation 2022 Equity and Incentive Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Restricted stock authorized under the plan (in shares)	5,000,000
Less net restricted stock granted (in shares)	(552,077)
Restricted stock available for issuance (in shares)	4,447,923
Main Street Capital Corporation 2022 Non-Employee Director Restricted Stock Plan \| Director
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Restricted stock authorized under the plan (in shares)	300,000
Less net restricted stock granted (in shares)	(7,525)
Restricted stock available for issuance (in shares)	292,475

SHARE-BASED COMPENSATION - Re_2

SHARE-BASED COMPENSATION - Restricted Share Awards (Details) - Restricted Stock	6 Months Ended
	Jun. 30, 2023 USD ($) $ / shares shares	Dec. 31, 2022 shares
Number of Shares
Nonvested beginning balance (in shares) \| shares	951,534	817,401
Granted (in shares) \| shares	544,533
Vested (in shares) \| shares	(398,914)
Forfeited (in shares) \| shares	(11,486)
Weighted-Average Grant-Date Fair Value
Nonvested beginning balance (in dollars per share)	$ 38.78
Granted (in dollars per share)	39.42
Vested (in dollars per share)	39.20
Forfeited (in dollars per share)	40.50
Nonvested ending balance (in dollars per share)	$ 40.48
Aggregate intrinsic value \| $	$ 38,090,000
Vesting period	3 years
Shares withheld for payroll taxes paid (in shares) \| shares	151,058
Share price (in dollars per share)	$ 40.03

COMMITMENTS AND CONTINGENCIES -

COMMITMENTS AND CONTINGENCIES - Outstanding Commitments (Details) $ in Thousands	Jun. 30, 2023 USD ($) investment
Other Commitments [Line Items]
Committed capital	$ 284,369
Equity
Other Commitments [Line Items]
Committed capital	35,792
Debt
Other Commitments [Line Items]
Committed capital	$ 248,577
Other Portfolio investments
Other Commitments [Line Items]
Contractual obligation, number of additional investments, investment period expired with remaining commitments restricted for fund expenses \| investment	6
Contractual obligation, number of additional investments, investment period expired with remaining commitments restricted for fund expenses or follow on investments in existing portfolio companies \| investment	3
Investment, Identifier [Axis]: 2717 MH, L.P.
Other Commitments [Line Items]
Committed capital	$ 52
Investment, Identifier [Axis]: AAC Holdings, Inc.
Other Commitments [Line Items]
Committed capital	200
Investment, Identifier [Axis]: AB Centers Acquisition Corporation
Other Commitments [Line Items]
Committed capital	8,103
Investment, Identifier [Axis]: AMEREQUIP LLC.
Other Commitments [Line Items]
Committed capital	7,704
Investment, Identifier [Axis]: ASC Interests, LLC
Other Commitments [Line Items]
Committed capital	300
Investment, Identifier [Axis]: ATS Operating, LLC
Other Commitments [Line Items]
Committed capital	1,080
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC
Other Commitments [Line Items]
Committed capital	2,210
Investment, Identifier [Axis]: Acousti Engineering Company of Florida
Other Commitments [Line Items]
Committed capital	53
Investment, Identifier [Axis]: Acumera, Inc.
Other Commitments [Line Items]
Committed capital	1,885
Investment, Identifier [Axis]: Adams Publishing Group, LLC
Other Commitments [Line Items]
Committed capital	788
Investment, Identifier [Axis]: American Health Staffing Group, Inc.
Other Commitments [Line Items]
Committed capital	1,333
Investment, Identifier [Axis]: ArborWorks, LLC
Other Commitments [Line Items]
Committed capital	2,128
Investment, Identifier [Axis]: Archer Systems, LLC
Other Commitments [Line Items]
Committed capital	7,115
Investment, Identifier [Axis]: Batjer TopCo, LLC
Other Commitments [Line Items]
Committed capital	2,700
Investment, Identifier [Axis]: Bettercloud, Inc.
Other Commitments [Line Items]
Committed capital	4,189
Investment, Identifier [Axis]: Bluestem Brands, Inc.
Other Commitments [Line Items]
Committed capital	2,019
Investment, Identifier [Axis]: Bond Brand Loyalty ULC
Other Commitments [Line Items]
Committed capital	1,427
Investment, Identifier [Axis]: Brightwood Capital Fund III, LP
Other Commitments [Line Items]
Committed capital	300
Investment, Identifier [Axis]: Brightwood Capital Fund V, LP
Other Commitments [Line Items]
Committed capital	3,000
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc.
Other Commitments [Line Items]
Committed capital	1,549
Investment, Identifier [Axis]: Career Team Holdings, LLC
Other Commitments [Line Items]
Committed capital	1,350
Investment, Identifier [Axis]: CaseWorthy, Inc.
Other Commitments [Line Items]
Committed capital	2,459
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC
Other Commitments [Line Items]
Committed capital	2,400
Investment, Identifier [Axis]: Chamberlin Holding LLC
Other Commitments [Line Items]
Committed capital	1,600
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC
Other Commitments [Line Items]
Committed capital	2,275
Investment, Identifier [Axis]: Clad-Rex Steel, LLC
Other Commitments [Line Items]
Committed capital	400
Investment, Identifier [Axis]: Classic H&G Holdco, LLC
Other Commitments [Line Items]
Committed capital	3,440
Investment, Identifier [Axis]: Cody Pools, Inc.
Other Commitments [Line Items]
Committed capital	4,214
Investment, Identifier [Axis]: Cybermedia Technologies, LLC
Other Commitments [Line Items]
Committed capital	2,000
Investment, Identifier [Axis]: Dalton US Inc.
Other Commitments [Line Items]
Committed capital	16,463
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc.
Other Commitments [Line Items]
Committed capital	4,250
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC
Other Commitments [Line Items]
Committed capital	1,115
Investment, Identifier [Axis]: Elgin AcquireCo, LLC
Other Commitments [Line Items]
Committed capital	1,877
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC
Other Commitments [Line Items]
Committed capital	1,965
Investment, Identifier [Axis]: Escalent, Inc.
Other Commitments [Line Items]
Committed capital	1,326
Investment, Identifier [Axis]: Evergreen North America Acquisitions, LLC
Other Commitments [Line Items]
Committed capital	1,313
Investment, Identifier [Axis]: Freeport Financial SBIC Fund LP
Other Commitments [Line Items]
Committed capital	3,841
Investment, Identifier [Axis]: Freeport First Lien Loan Fund III LP
Other Commitments [Line Items]
Committed capital	6,733
Investment, Identifier [Axis]: GRT Rubber Technologies LLC
Other Commitments [Line Items]
Committed capital	2,050
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC
Other Commitments [Line Items]
Committed capital	2,273
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC
Other Commitments [Line Items]
Committed capital	1,919
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC
Other Commitments [Line Items]
Committed capital	1,200
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC
Other Commitments [Line Items]
Committed capital	400
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC
Other Commitments [Line Items]
Committed capital	10,125
Investment, Identifier [Axis]: HPEP 3, L.P.
Other Commitments [Line Items]
Committed capital	1,555
Investment, Identifier [Axis]: HPEP 4, L.P.
Other Commitments [Line Items]
Committed capital	7,204
Investment, Identifier [Axis]: HPEP 423 COR, LP
Other Commitments [Line Items]
Committed capital	600
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC
Other Commitments [Line Items]
Committed capital	334
Investment, Identifier [Axis]: IG Investor, LLC
Other Commitments [Line Items]
Committed capital	4,000
Investment, Identifier [Axis]: IG Parent Corporation
Other Commitments [Line Items]
Committed capital	2,500
Investment, Identifier [Axis]: ITA Holdings Group, LLC
Other Commitments [Line Items]
Committed capital	2,174
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C.
Other Commitments [Line Items]
Committed capital	2,965
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC
Other Commitments [Line Items]
Committed capital	1,008
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC
Other Commitments [Line Items]
Committed capital	555
Investment, Identifier [Axis]: Interface Security Systems, L.L.C
Other Commitments [Line Items]
Committed capital	1
Investment, Identifier [Axis]: Invincible Boat Company, LLC.
Other Commitments [Line Items]
Committed capital	457
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC
Other Commitments [Line Items]
Committed capital	8,421
Investment, Identifier [Axis]: Jackmont Hospitality, Inc.
Other Commitments [Line Items]
Committed capital	237
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC
Other Commitments [Line Items]
Committed capital	500
Investment, Identifier [Axis]: Johnson Downie Opco, LLC
Other Commitments [Line Items]
Committed capital	1,800
Investment, Identifier [Axis]: MS Private Loan Fund I, LP
Other Commitments [Line Items]
Committed capital	10,000
Investment, Identifier [Axis]: MS Private Loan Fund I, LP 1
Other Commitments [Line Items]
Committed capital	750
Investment, Identifier [Axis]: Mako Steel, LP
Other Commitments [Line Items]
Committed capital	1,278
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC
Other Commitments [Line Items]
Committed capital	2,795
Investment, Identifier [Axis]: Microbe Formulas, LLC
Other Commitments [Line Items]
Committed capital	3,601
Investment, Identifier [Axis]: MonitorUS Holding, LLC
Other Commitments [Line Items]
Committed capital	1,623
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC
Other Commitments [Line Items]
Committed capital	800
Investment, Identifier [Axis]: NWN Corporation
Other Commitments [Line Items]
Committed capital	4,379
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC
Other Commitments [Line Items]
Committed capital	2,500
Investment, Identifier [Axis]: NexRev LLC
Other Commitments [Line Items]
Committed capital	4,000
Investment, Identifier [Axis]: NinjaTrader, LLC
Other Commitments [Line Items]
Committed capital	1,750
Investment, Identifier [Axis]: Orttech Holdings, LLC
Other Commitments [Line Items]
Committed capital	800
Investment, Identifier [Axis]: PTL US Bidco, Inc
Other Commitments [Line Items]
Committed capital	7,156
Investment, Identifier [Axis]: Paragon Healthcare, Inc.
Other Commitments [Line Items]
Committed capital	4,110
Investment, Identifier [Axis]: Pearl Meyer Topco LLC
Other Commitments [Line Items]
Committed capital	1,500
Investment, Identifier [Axis]: Power System Solutions
Other Commitments [Line Items]
Committed capital	9,255
Investment, Identifier [Axis]: Project BarFly, LLC
Other Commitments [Line Items]
Committed capital	760
Investment, Identifier [Axis]: Project Eagle Holdings, LLC
Other Commitments [Line Items]
Committed capital	1,250
Investment, Identifier [Axis]: RA Outdoors LLC
Other Commitments [Line Items]
Committed capital	1,278
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC
Other Commitments [Line Items]
Committed capital	1,644
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc.
Other Commitments [Line Items]
Committed capital	4,500
Investment, Identifier [Axis]: Roof Opco, LLC
Other Commitments [Line Items]
Committed capital	1,556
Investment, Identifier [Axis]: SI East, LLC
Other Commitments [Line Items]
Committed capital	7,500
Investment, Identifier [Axis]: SIB Holdings, LLC
Other Commitments [Line Items]
Committed capital	160
Investment, Identifier [Axis]: SPAU Holdings, LLC
Other Commitments [Line Items]
Committed capital	2,235
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC
Other Commitments [Line Items]
Committed capital	4,465
Investment, Identifier [Axis]: Superior Rigging & Erecting Co.
Other Commitments [Line Items]
Committed capital	2,500
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC
Other Commitments [Line Items]
Committed capital	1,600
Investment, Identifier [Axis]: UnionRock Energy Fund II, LP
Other Commitments [Line Items]
Committed capital	1,907
Investment, Identifier [Axis]: UnionRock Energy Fund III, LP
Other Commitments [Line Items]
Committed capital	9,850
Investment, Identifier [Axis]: VVS Holdco, LLC
Other Commitments [Line Items]
Committed capital	3,200
Investment, Identifier [Axis]: Veregy Consolidated, Inc.
Other Commitments [Line Items]
Committed capital	5,875
Investment, Identifier [Axis]: Wall Street Prep, Inc.
Other Commitments [Line Items]
Committed capital	400
Investment, Identifier [Axis]: Watterson Brands, LLC
Other Commitments [Line Items]
Committed capital	3,917
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC
Other Commitments [Line Items]
Committed capital	2,411
Investment, Identifier [Axis]: Winter Services LLC
Other Commitments [Line Items]
Committed capital	2,222
Investment, Identifier [Axis]: Xenon Arc, Inc.
Other Commitments [Line Items]
Committed capital	9,408
Brightwood Capital Fund Investments \| Equity
Other Commitments [Line Items]
Committed capital	3,300
Freeport Fund Investments \| Equity
Other Commitments [Line Items]
Committed capital	10,574
Harris Preston Fund Investments \| Equity
Other Commitments [Line Items]
Committed capital	9,411
UnionRock Energy Fund Investments
Other Commitments [Line Items]
Committed capital	$ 11,757

RELATED PARTY TRANSACTIONS (Det

RELATED PARTY TRANSACTIONS (Details) - Related Party - USD ($) $ in Millions		1 Months Ended			6 Months Ended
	Dec. 29, 2021	Mar. 31, 2022	Feb. 28, 2022	Dec. 31, 2020	Jun. 30, 2023	May 31, 2023	May 31, 2022
External Investment Manager
Related Party Transaction [Line Items]
Receivable					$ 10.5
MSC Income
Related Party Transaction [Line Items]
Shares acquired (in shares)					350,452	255,755	94,697
Operating Expenses and Amount Due From Tax Sharing Agreement \| External Investment Manager
Related Party Transaction [Line Items]
Receivable					$ 7.6
Dividends Declared But Not Yet Paid \| External Investment Manager
Related Party Transaction [Line Items]
Receivable					2.9
Investment Management Agreement \| Private Loan Fund
Related Party Transaction [Line Items]
Amount of transaction			$ 15	$ 10
Funded commitments					14.3
Unfunded commitments					0.7
Unsecured Revolving Promissory Note \| Private Loan Fund
Related Party Transaction [Line Items]
Amount of transaction	$ 85
Interest rate	5%
Secured Revolving Promissory Note \| Private Loan Fund
Related Party Transaction [Line Items]
Amount of transaction		$ 10
Interest rate		5%
Unused capacity, commitment fee percentage		0.25%
2015 Deferred Compensation Plan
Related Party Transaction [Line Items]
Amount of transaction					$ 18.4
2015 Deferred Compensation Plan \| Common Stock
Related Party Transaction [Line Items]
Deferred compensation (in shares)					170,008
2015 Deferred Compensation Plan \| Phantom Stock Units
Related Party Transaction [Line Items]
Amount of transaction					$ 6.8

SUBSEQUENT EVENTS (Details)

SUBSEQUENT EVENTS (Details) - USD ($)		1 Months Ended	3 Months Ended	6 Months Ended	195 Months Ended
SUBSEQUENT EVENTS (Details) - USD ($)	Aug. 04, 2023	Jul. 31, 2023	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2023
Forecast
Subsequent Event [Line Items]
Common stock, monthly dividend, per share, declared (in dollars per share)			$ 0.705
Increase common stock, monthly dividend, cash paid			6.80%
Common stock, cumulative monthly dividend and supplemental dividend, per share, paid (in dollars per share)					$ 38.54
Revolving Credit Facility \| Corporate Facility \| Line of Credit
Subsequent Event [Line Items]
Line of credit facility, maximum borrowing capacity				$ 980,000,000
Line of credit facility, maximum borrowing capacity including accordion feature				$ 1,400,000,000
Subsequent Event
Subsequent Event [Line Items]
Common stock, supplemental cash dividend, per share, declared (in dollars per share)	$ 0.275
Subsequent Event \| Dividends, July to September 2023
Subsequent Event [Line Items]
Common stock, monthly dividend, per share, declared (in dollars per share)	0.23
Subsequent Event \| Dividends, October to December 2023
Subsequent Event [Line Items]
Common stock, monthly dividend, per share, declared (in dollars per share)	$ 0.235
Subsequent Event \| Revolving Credit Facility \| Corporate Facility \| Line of Credit
Subsequent Event [Line Items]
Line of credit facility, maximum borrowing capacity		$ 995,000,000
Line of credit facility, maximum borrowing capacity including accordion feature		$ 1,400,000,000

Consolidated Schedule of Inve_5

Consolidated Schedule of Investments In and Advances to Affiliates (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2023		Jun. 30, 2022		Jun. 30, 2023		Jun. 30, 2022		Dec. 31, 2022
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ (75,506)		$ (5,064)		$ (103,886)		$ (1,728)
Amount of Unrealized Gain/(Loss)		104,941		(24,593)		140,059		(9,841)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[1]					4,102,177
Ending balance		4,210,543		4,210,543	[2]	4,210,543		4,210,543	[2]
Fair value		4,210,543		4,210,543	[2]	4,210,543		4,210,543	[2]	$ 4,102,177	[1]
Control investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		(48,111)		0		(51,077)		0
Amount of Unrealized Gain/(Loss)		75,779		4,822		92,940		13,101
Amount of Interest, Fees or Dividends Credited to Income						96,841		69,385
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,703,172	[1],[3]	1,489,257
Gross Additions						338,651		176,645
Gross Reductions						173,038		85,996
Ending balance		1,883,699	[2],[4]	1,538,158		1,883,699	[2],[4]	1,538,158
Fair value		1,883,699	[2],[4]	1,538,158		1,883,699	[2],[4]	1,538,158		1,703,172	[1],[3]
Control investments \| Midwest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		453,692		341,821		453,692		341,821
Fair value		$ 453,692		$ 341,821		$ 453,692		$ 341,821
Net assets, percentage		24.10%		22.20%		24.10%		22.20%
Control investments \| Northeast Region and Canada
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 283,469				$ 283,469
Fair value		$ 283,469				$ 283,469
Net assets, percentage		15%				15%
Control investments \| Northeast
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance				$ 140,103				$ 140,103
Fair value				$ 140,103				$ 140,103
Net assets, percentage				9.10%				9.10%
Control investments \| Southeast
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 51,394		$ 17,479		$ 51,394		$ 17,479
Fair value		$ 51,394		$ 17,479		$ 51,394		$ 17,479
Net assets, percentage		2.70%		1.10%		2.70%		1.10%
Control investments \| Southwest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 655,449		$ 588,039		$ 655,449		$ 588,039
Fair value		$ 655,449		$ 588,039		$ 655,449		$ 588,039
Net assets, percentage		34.80%		38.20%		34.80%		38.20%
Control investments \| West
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 439,695		$ 450,716		$ 439,695		$ 450,716
Fair value		$ 439,695		$ 450,716		$ 439,695		$ 450,716
Net assets, percentage		23.30%		29.30%		23.30%		29.30%
Affiliate investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)		$ 9,997		$ 47		$ (16,267)		$ 739
Amount of Unrealized Gain/(Loss)		(11,469)		1,731		21,672		4,772
Amount of Interest, Fees or Dividends Credited to Income						38,455		25,810
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						618,359	[1],[5]	549,214
Gross Additions						175,201		37,832
Gross Reductions						215,521		36,388
Ending balance		563,125	[2],[6]	518,061		563,125	[2],[6]	518,061
Fair value		563,125	[2],[6]	518,061		563,125	[2],[6]	518,061		618,359	[1],[5]
Affiliate investments \| Midwest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		78,205		68,747		78,205		68,747
Fair value		$ 78,205		$ 68,747		$ 78,205		$ 68,747
Net assets, percentage		13.90%		13.30%		13.90%		13.30%
Affiliate investments \| Northeast Region and Canada
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 102,097				$ 102,097
Fair value		$ 102,097				$ 102,097
Net assets, percentage		18.10%				18.10%
Affiliate investments \| Northeast
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance				$ 102,679				$ 102,679
Fair value				$ 102,679				$ 102,679
Net assets, percentage				19.80%				19.80%
Affiliate investments \| Southeast
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 172,637		$ 162,554		$ 172,637		$ 162,554
Fair value		$ 172,637		$ 162,554		$ 172,637		$ 162,554
Net assets, percentage		30.70%		31.40%		30.70%		31.40%
Affiliate investments \| Southwest
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 79,676		$ 103,708		$ 79,676		$ 103,708
Fair value		$ 79,676		$ 103,708		$ 79,676		$ 103,708
Net assets, percentage		14.10%		20%		14.10%		20%
Affiliate investments \| West
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 130,510		$ 80,373		$ 130,510		$ 80,373
Fair value		$ 130,510		$ 80,373		$ 130,510		$ 80,373
Net assets, percentage		23.20%		15.50%		23.20%		15.50%
Investment, Identifier [Axis]: 2717 MH, L.P., LP Interests (2717 HPP-MS, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						67		0
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						248		0
Gross Additions						67		244
Gross Reductions						0		0
Ending balance		$ 315		$ 244		315		244
Fair value		315		244		315		244		248
Investment, Identifier [Axis]: 2717 MH, L.P., LP Interests (2717 MH, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						1,677		0
Amount of Unrealized Gain/(Loss)						(675)		1,408
Amount of Interest, Fees or Dividends Credited to Income						141		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						7,552		3,971
Gross Additions						2,077		2,583
Gross Reductions						3,283		0
Ending balance		6,346		6,554		6,346		6,554
Fair value		6,346		6,554		6,346		6,554		7,552
Investment, Identifier [Axis]: 423 HAR, LP, LP Interests (423 HAR, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						750
Gross Reductions						0
Ending balance		750				750
Fair value		750				750				0
Investment, Identifier [Axis]: AAC Holdings, Inc., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		(1,279)
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0	[7]	2,079
Gross Additions						0		0
Gross Reductions						0		1,279
Ending balance		0	[8]	800		0	[8]	800
Fair value		$ 0	[8]	$ 800		0	[8]	$ 800		$ 0	[7]
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate				18%				18%		18%	[7]
PIK Rate				8%				8%		18%	[7]
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(150)
Amount of Interest, Fees or Dividends Credited to Income								970
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						$ 11,550	[7]	9,794
Gross Additions								296
Gross Reductions								0
Ending balance				$ 10,090				10,090
Fair value				10,090				10,090		$ 11,550	[7]
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[8]	18%				18%
PIK Rate	[8]	18%				18%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(16)
Amount of Interest, Fees or Dividends Credited to Income						27
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						376
Gross Reductions						16
Ending balance	[8]	$ 360				360
Fair value		$ 360	[8]			$ 360	[8]			0
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[8]	18%				18%
PIK Rate	[8]	18%				18%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(558)
Amount of Interest, Fees or Dividends Credited to Income						1,149
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						11,550
Gross Additions						1,149
Gross Reductions						558
Ending balance	[8]	$ 12,141				12,141
Fair value		12,141	[8]			12,141	[8]			11,550
Investment, Identifier [Axis]: AAC Holdings, Inc., Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		(1,200)
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0	[7],[9]	1,940
Gross Additions						0		0
Gross Reductions						0		1,200
Ending balance		0	[8],[10]	740		0	[8],[10]	740
Fair value		$ 0	[8],[10]	740		$ 0	[8],[10]	740		$ 0	[7],[9]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Spread		5%	[11],[12],[13]			5%	[11],[12],[13]			6%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (39)
Ending balance	[11],[12],[13]	$ (68)				(68)
Fair value		$ (68)	[11],[12],[13]			$ (68)	[11],[12],[13]			$ (39)	[14],[15],[16],[17]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[14],[15],[16]									10.20%
Spread		6%	[11],[12],[13],[18]			6%	[11],[12],[13],[18]			6%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 741
Ending balance	[11],[12],[13],[18]	$ 0				0
Fair value		$ 0	[11],[12],[13],[18]			$ 0	[11],[12],[13],[18]			$ 741	[14],[15],[16]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.20%	[11],[12],[18]			11.20%	[11],[12],[18]			10.58%	[14],[15],[16]
Spread		6%	[11],[12],[18]			6%	[11],[12],[18]			6%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 17,052
Ending balance	[11],[12],[18]	$ 21,296				21,296
Fair value		$ 21,296	[11],[12],[18]			$ 21,296	[11],[12],[18]			$ 17,052	[14],[15],[16]
Investment, Identifier [Axis]: ADS Tactical, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.94%	[8],[12],[18]			10.94%	[8],[12],[18]			10.14%	[7],[16]
Spread		5.75%	[8],[12],[18]			5.75%	[8],[12],[18]			5.75%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]					$ 18,969
Ending balance	[8],[12],[18]	$ 19,492				19,492
Fair value		19,492	[8],[12],[18]			19,492	[8],[12],[18]			$ 18,969	[7],[16]
Investment, Identifier [Axis]: AFG Capital Group, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						7,200		0
Amount of Unrealized Gain/(Loss)						(8,200)		1,040
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						9,400	[19]	7,740
Gross Additions						7,200		1,040
Gross Reductions						16,600		0
Ending balance		0		8,780		0		8,780
Fair value		0		$ 8,780		0		$ 8,780		9,400	[19]
Investment, Identifier [Axis]: AFG Capital Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				10%				10%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								144
Gross Additions								0
Gross Reductions								144
Ending balance				$ 0				0
Fair value				0				0
Investment, Identifier [Axis]: AMEREQUIP LLC., Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					1,779
Ending balance	[11],[20]	1,930				1,930
Fair value		$ 1,930	[11],[20]			$ 1,930	[11],[20]			$ 1,779	[14]
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 1
Schedule of Investments [Line Items]
Spread		7.40%	[11],[12],[13],[18]			7.40%	[11],[12],[13],[18]			7.40%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (137)
Ending balance	[11],[12],[13],[18]	$ (122)				(122)
Fair value		$ (122)	[11],[12],[13],[18]			$ (122)	[11],[12],[13],[18]			$ (137)	[14],[15],[16],[17]
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.70%	[11],[12],[18]			12.70%	[11],[12],[18]			11.72%	[14],[15],[16]
Spread		7.40%	[11],[12],[18]			7.40%	[11],[12],[18]			7.40%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 37,463
Ending balance	[11],[12],[18]	$ 37,264				37,264
Fair value		37,264	[11],[12],[18]			37,264	[11],[12],[18]			$ 37,463	[14],[15],[16]
Investment, Identifier [Axis]: ASC Interests, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(384)		80
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						800		720
Gross Additions						94		80
Gross Reductions						384		0
Ending balance		510		800		510		800
Fair value		$ 510		$ 800		$ 510		$ 800		$ 800
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13%		13%		13%		13%		13%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						27		13
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						400		200
Gross Additions						0		0
Gross Reductions						0		30
Ending balance		$ 400		$ 170		400		170
Fair value		$ 400		$ 170		$ 400		$ 170		$ 400
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%		13%		13%		13%		13%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(52)		0
Amount of Interest, Fees or Dividends Credited to Income						108		120
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,649		1,636
Gross Additions						0		12
Gross Reductions						52		0
Ending balance		$ 1,597		$ 1,648		1,597		1,648
Fair value		1,597		$ 1,648		1,597		$ 1,648		$ 1,649
Investment, Identifier [Axis]: ATS Operating, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					660
Ending balance	[11]	660				660
Fair value		$ 660	[11]			$ 660	[11]			$ 660	[14]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	11.75%				11.75%
Spread		6.50%	[11],[12],[18]			6.50%	[11],[12],[18]			5.50%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ 0
Ending balance	[11],[12],[18]	$ 720				720
Fair value		$ 720	[11],[12],[18]			$ 720	[11],[12],[18]			$ 0	[14],[15],[16],[17]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.65%	[11],[12],[18]			10.65%	[11],[12],[18]			9.32%	[14],[15],[16]
Spread		5.50%	[11],[12],[18]			5.50%	[11],[12],[18]			5.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 6,582
Ending balance	[11],[12],[18]	$ 6,660				6,660
Fair value		$ 6,660	[11],[12],[18]			$ 6,660	[11],[12],[18]			$ 6,582	[14],[15],[16]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.65%	[11],[12],[18]			12.65%	[11],[12],[18]			11.32%	[14],[15],[16]
Spread		7.50%	[11],[12],[18]			7.50%	[11],[12],[18]			7.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 6,593
Ending balance	[11],[12],[18]	$ 6,660				6,660
Fair value		6,660	[11],[12],[18]			6,660	[11],[12],[18]			$ 6,593	[14],[15],[16]
Investment, Identifier [Axis]: ATS Workholding, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[11]	0				0
Fair value		$ 0	[11]			$ 0	[11]			$ 0	[14]
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				5%				5%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								3,005
Gross Additions								0
Gross Reductions								66
Ending balance				$ 2,939				2,939
Fair value				$ 2,939				$ 2,939
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		5%	[11],[21]			5%	[11],[21]			5%	[14],[22]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(277)
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[22]					634
Gross Additions						126
Gross Reductions						277
Ending balance	[11],[21]	$ 483				483
Fair value		$ 483	[11],[21]			$ 483	[11],[21]			$ 634	[14],[22]
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		5%	[11],[21]			5%	[11],[21]			5%	[14],[22]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(286)
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[22]					1,005
Gross Additions						0
Gross Reductions						286
Ending balance	[11],[21]	$ 719				719
Fair value		719	[11],[21]			719	[11],[21]			$ 1,005	[14],[22]
Investment, Identifier [Axis]: ATX Networks Corp., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						3,248
Amount of Unrealized Gain/(Loss)						(3,270)
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]					3,270
Gross Additions						3,248
Gross Reductions						6,518
Ending balance		0				0
Fair value		$ 0				$ 0				$ 3,270	[7]
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate				8.92%				8.92%		12.23%	[7],[16]
Spread		7.50%		7.50%		7.50%		7.50%		7.50%	[7],[16]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(134)		(309)
Amount of Interest, Fees or Dividends Credited to Income						886		388
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						6,343	[7],[16]	7,092
Gross Additions						575		228
Gross Reductions						6,918		1,133
Ending balance		$ 0		$ 6,187		0		6,187
Fair value		0		$ 6,187		0		$ 6,187		$ 6,343	[7],[16]
Investment, Identifier [Axis]: ATX Networks Corp., Unsecured Debt
Schedule of Investments [Line Items]
Total Rate				10%				10%		10%	[7]
PIK Rate				10%				10%		10%	[7]
Amount of Realized Gain/(Loss)						0		$ 0
Amount of Unrealized Gain/(Loss)						(306)		120
Amount of Interest, Fees or Dividends Credited to Income						1,160		159
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,598	[7]	1,963
Gross Additions						1,160		437
Gross Reductions						3,758		158
Ending balance		0		$ 2,242		0		2,242
Fair value		0		2,242		0		2,242		$ 2,598	[7]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					406
Ending balance	[11]	1,011				1,011
Fair value		$ 1,011	[11]			$ 1,011	[11]			$ 406	[14]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	12.63%				12.63%
Spread		7.25%	[11],[12],[18]			7.25%	[11],[12],[18]			7.25%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (57)
Ending balance	[11],[12],[18]	$ 1,425				1,425
Fair value		$ 1,425	[11],[12],[18]			$ 1,425	[11],[12],[18]			$ (57)	[14],[15],[16],[17]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.65%	[11],[12],[18]			12.65%	[11],[12],[18]			12.17%	[14],[15],[16]
Spread		7.25%	[11],[12],[18]			7.25%	[11],[12],[18]			7.25%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 27,927
Ending balance	[11],[12],[18]	$ 18,714				18,714
Fair value		$ 18,714	[11],[12],[18]			$ 18,714	[11],[12],[18]			$ 27,927	[14],[15],[16]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.75%	[11],[12]			15.75%	[11],[12]			13.23%	[14],[16]
Spread		7.50%	[11],[12]			7.50%	[11],[12]			8.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 1,678
Ending balance	[11],[12]	$ 1,678				1,678
Fair value		$ 1,678	[11],[12]			$ 1,678	[11],[12]			$ 1,678	[14],[16]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.75%	[11],[12]			15.75%	[11],[12]			13.23%	[14],[16]
Spread		7.50%	[11],[12]			7.50%	[11],[12]			8.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 9,891
Ending balance	[11],[12]	$ 9,620				9,620
Fair value		$ 9,620	[11],[12]			$ 9,620	[11],[12]			$ 9,891	[14],[16]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		19.75%	[11],[12]			19.75%	[11],[12]			16.17%	[14],[16]
Spread		11.50%	[11],[12]			11.50%	[11],[12]			12.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 807
Ending balance	[11],[12]	$ 785				785
Fair value		$ 785	[11],[12]			$ 785	[11],[12]			$ 807	[14],[16]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[14],[16]									13.88%
Spread		7.50%	[11],[12],[13],[18]			7.50%	[11],[12],[13],[18]			9.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 14,618
Ending balance	[11],[12],[13],[18]	$ (30)				(30)
Fair value		$ (30)	[11],[12],[13],[18]			$ (30)	[11],[12],[13],[18]			$ 14,618	[14],[16]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.85%	[11],[12],[18]			12.85%	[11],[12],[18]			13.57%	[14],[16]
Spread		7.50%	[11],[12],[18]			7.50%	[11],[12],[18]			9%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 4,368
Ending balance	[11],[12],[18]	$ 43,162				43,162
Fair value		43,162	[11],[12],[18]			43,162	[11],[12],[18]			$ 4,368	[14],[16]
Investment, Identifier [Axis]: Acumera, Inc., Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[23]	0				0
Fair value	[11],[23]	$ 0				$ 0
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10%	[11],[12],[18],[24]			10%	[11],[12],[18],[24]			10%	[14],[16],[25]
Spread		7%	[11],[12],[18],[24]			7%	[11],[12],[18],[24]			6%	[14],[16],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[25]					$ 4,729
Ending balance	[11],[12],[18],[24]	$ 6,976				6,976
Fair value		$ 6,976	[11],[12],[18],[24]			$ 6,976	[11],[12],[18],[24]			$ 4,729	[14],[16],[25]
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%	[11],[12],[18],[24]			10%	[11],[12],[18],[24]			10%	[14],[16],[25]
Spread		7%	[11],[12],[18],[24]			7%	[11],[12],[18],[24]			7.50%	[14],[16],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[25]					$ 24,086
Ending balance	[11],[12],[18],[24]	$ 22,383				22,383
Fair value		$ 22,383	[11],[12],[18],[24]			$ 22,383	[11],[12],[18],[24]			$ 24,086	[14],[16],[25]
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[11],[12],[13]			6%	[11],[12],[13]			6%	[14],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[17]					$ (10)
Ending balance	[11],[12],[13]	$ (9)				(9)
Fair value		$ (9)	[11],[12],[13]			$ (9)	[11],[12],[13]			$ (10)	[14],[16],[17]
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.43%	[11],[12]			11.43%	[11],[12]			11.12%	[14],[16]
Spread		6%	[11],[12]			6%	[11],[12]			6%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 6,617
Ending balance	[11],[12]	$ 6,583				6,583
Fair value		$ 6,583	[11],[12]			$ 6,583	[11],[12]			$ 6,617	[14],[16]
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.79%	[11],[12],[18]			11.79%	[11],[12],[18]			10.46%	[14],[15],[16]
Spread		6.75%	[11],[12],[18]			6.75%	[11],[12],[18]			6.75%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 14,606
Ending balance	[11],[12],[18]	$ 12,216				12,216
Fair value		$ 12,216	[11],[12],[18]			$ 12,216	[11],[12],[18]			$ 14,606	[14],[15],[16]
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.79%	[11],[12],[18],[21]			14.79%	[11],[12],[18],[21]			12.46%	[14],[15],[16]
Spread		8.75%	[11],[12],[18],[21]			8.75%	[11],[12],[18],[21]			8.75%	[14],[15],[16]
PIK Rate	[11],[12],[18],[21]	1%				1%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 14,654
Ending balance	[11],[12],[18],[21]	$ 10,618				10,618
Fair value		$ 10,618	[11],[12],[18],[21]			$ 10,618	[11],[12],[18],[21]			$ 14,654	[14],[15],[16]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		7.50%	[8],[21],[26]			7.50%	[8],[21],[26]			7.50%	[7],[22]
Spread		6.50%	[8],[21],[26]			6.50%	[8],[21],[26]			6.50%	[7],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[22]					$ 168
Ending balance	[8],[21],[26]	$ 135				135
Fair value		$ 135	[8],[21],[26]			$ 135	[8],[21],[26]			$ 168	[7],[22]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		7.50%	[8],[12],[21],[26]			7.50%	[8],[12],[21],[26]			7.50%	[7],[16],[22]
Spread		6.50%	[8],[12],[21],[26]			6.50%	[8],[12],[21],[26]			6.50%	[7],[16],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16],[22]					$ 808
Ending balance	[8],[12],[21],[26]	$ 647				647
Fair value		647	[8],[12],[21],[26]			647	[8],[12],[21],[26]			$ 808	[7],[16],[22]
Investment, Identifier [Axis]: Amounts related to investments transferred to or from other 1940 Act classification during the period, Affiliate Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		139
Amount of Interest, Fees or Dividends Credited to Income						171		1,302
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						14,914		32,597
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		0		0		0		0
Fair value		0		0		0		0		14,914
Investment, Identifier [Axis]: Amounts related to investments transferred to or from other 1940 Act classification during the period, Control Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						(171)		57
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						(14,914)		41,748
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		0		0		0		0
Fair value		$ 0		0		$ 0		0		$ (14,914)
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								(576)
Amount of Interest, Fees or Dividends Credited to Income								0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								4,894
Gross Additions								0
Gross Reductions								576
Ending balance				4,318				4,318
Fair value				$ 4,318				$ 4,318
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate		14.13%				14.13%				14.13%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		$ 0				0
Fair value		0				0				$ 0
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						566
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,504
Gross Additions						566
Gross Reductions						0
Ending balance		4,070				4,070
Fair value		$ 4,070				$ 4,070				$ 3,504
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%				12%
Spread				10%				10%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								339
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								4,736
Gross Additions								45
Gross Reductions								140
Ending balance				$ 4,641				4,641
Fair value				4,641				4,641
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		10%	[12],[13]			10%	[12],[13]			10%	[16],[17]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[17]					(3)
Gross Additions						1
Gross Reductions						0
Ending balance	[12],[13]	$ (2)				(2)
Fair value		$ (2)	[12],[13]			$ (2)	[12],[13]			$ (3)	[16],[17]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.25%	[12]			15.25%	[12]			14.13%	[16]
Spread		10%	[12]			10%	[12]			10%	[16]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						379
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16]					4,545
Gross Additions						39
Gross Reductions						140
Ending balance	[12]	$ 4,444				4,444
Fair value		4,444	[12]			4,444	[12]			$ 4,545	[16]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[9]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[10]	0				0
Fair value		0	[10]			0	[10]			0	[9]
Investment, Identifier [Axis]: ArborWorks, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					0
Ending balance	[11]	0				0
Fair value		$ 0	[11]			$ 0	[11]			$ 0	[14]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.25%	[11],[12],[18]			15.25%	[11],[12],[18]			13.41%	[14],[16]
Spread		7%	[11],[12],[18]			7%	[11],[12],[18]			9%	[14],[16]
PIK Rate	[11],[12],[18]	3%				3%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 3,945
Ending balance	[11],[12],[18]	$ 3,799				3,799
Fair value		$ 3,799	[11],[12],[18]			$ 3,799	[11],[12],[18]			$ 3,945	[14],[16]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15.23%	[11],[12],[18]			15.23%	[11],[12],[18]			13.56%	[14],[16]
Spread		7%	[11],[12],[18]			7%	[11],[12],[18]			9%	[14],[16]
PIK Rate	[11],[12],[18]	14.40%				14.40%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 25,065
Ending balance	[11],[12],[18]	$ 22,962				22,962
Fair value		22,962	[11],[12],[18]			22,962	[11],[12],[18]			$ 25,065	[14],[16]
Investment, Identifier [Axis]: Archer Systems, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					1,388
Ending balance	[11]	1,940				1,940
Fair value		$ 1,940	[11]			$ 1,940	[11]			$ 1,388	[14]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[11],[12],[13],[18]			6%	[11],[12],[13],[18]			6.50%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (135)
Ending balance	[11],[12],[13],[18]	$ (121)				(121)
Fair value		$ (121)	[11],[12],[13],[18]			$ (121)	[11],[12],[13],[18]			$ (135)	[14],[15],[16],[17]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.39%	[11],[12],[18]			11.39%	[11],[12],[18]			10.92%	[14],[15],[16]
Spread		6%	[11],[12],[18]			6%	[11],[12],[18]			6.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 66,511
Ending balance	[11],[12],[18]	$ 52,846				52,846
Fair value		52,846	[11],[12],[18]			52,846	[11],[12],[18]			$ 66,511	[14],[15],[16]
Investment, Identifier [Axis]: Arrow International, Inc, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[14],[15],[16],[27]									10.36%
Spread	[14],[15],[16],[27]									6.60%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[27]					36,000
Fair value	[14],[15],[16],[27]									$ 36,000
Investment, Identifier [Axis]: BBB Tank Services, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0		0
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		0		0		0		0
Fair value		$ 0		0		$ 0		0		$ 0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Preferred Stock (non-voting)
Schedule of Investments [Line Items]
Total Rate		15%				15%				15%
Amount of Realized Gain/(Loss)						$ 0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0		0
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		$ 0		0		0		0
Fair value		$ 0		$ 0		$ 0		$ 0		$ 0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt
Schedule of Investments [Line Items]
Total Rate				12.06%				12.06%
Spread				11%				11%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(209)
Amount of Interest, Fees or Dividends Credited to Income								290
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								2,507
Gross Additions								0
Gross Reductions								209
Ending balance				$ 2,298				2,298
Fair value				2,298				2,298
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 1
Schedule of Investments [Line Items]
Total Rate		16.17%	[12],[26]			16.17%	[12],[26]			15.12%	[16],[28]
Spread		11%	[12],[26]			11%	[12],[26]			11%	[16],[28]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						63
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[28]					800
Gross Additions						0
Gross Reductions						0
Ending balance	[12],[26]	$ 800				800
Fair value		$ 800	[12],[26]			$ 800	[12],[26]			$ 800	[16],[28]
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 2
Schedule of Investments [Line Items]
Total Rate		16.17%	[12],[26]			16.17%	[12],[26]			15.12%	[16],[28]
Spread		11%	[12],[26]			11%	[12],[26]			11%	[16],[28]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						116
Amount of Interest, Fees or Dividends Credited to Income						317
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[28]					2,086
Gross Additions						116
Gross Reductions						0
Ending balance	[12],[26]	$ 2,202				2,202
Fair value		2,202	[12],[26]			2,202	[12],[26]			$ 2,086	[16],[28]
Investment, Identifier [Axis]: Barfly Ventures, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(280)		470
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,320	[14]	1,930
Gross Additions						0		470
Gross Reductions						280		0
Ending balance		3,040	[11]	2,400		3,040	[11]	2,400
Fair value		$ 3,040	[11]	$ 2,400		$ 3,040	[11]	$ 2,400		$ 3,320	[14]
Investment, Identifier [Axis]: Barfly Ventures, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		7%	[11]	7%		7%	[11]	7%		7%	[14]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						44		25
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						711	[14]	711
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		$ 711	[11]	$ 711		711	[11]	711
Fair value		711	[11]	711		711	[11]	711		$ 711	[14]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								0
Gross Additions								4,073
Gross Reductions								0
Ending balance				4,073				4,073
Fair value				$ 4,073				$ 4,073
Investment, Identifier [Axis]: Batjer TopCo, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						2,055
Amount of Interest, Fees or Dividends Credited to Income						574
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19]					4,095
Gross Additions						2,055
Gross Reductions						0
Ending balance	[20]	6,150				6,150
Fair value		6,150	[20]			6,150	[20]			4,095	[19]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				11%				11%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								512
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								0
Gross Additions								11,372
Gross Reductions								459
Ending balance				$ 10,913				10,913
Fair value				10,913				10,913
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						7
Amount of Interest, Fees or Dividends Credited to Income						1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[17]					(8)
Gross Additions						8
Gross Reductions						0
Ending balance	[13]	0				0
Fair value		$ 0	[13]			$ 0	[13]			(8)	[17]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%				10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[17]					$ 0
Ending balance		$ 10,575				10,575
Fair value		10,575				10,575				0	[17]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		0				0
Fair value		$ 0				$ 0				$ 0
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10%				10%				11%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						78
Amount of Interest, Fees or Dividends Credited to Income						583
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						10,933
Gross Additions						92
Gross Reductions						450
Ending balance		$ 10,575				10,575
Fair value		10,575				10,575				$ 10,933
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate	[14],[19],[29]									8%
PIK Rate	[14],[19],[29]									8%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[19],[29]					4,561
Ending balance	[11],[20],[30]	3,940				3,940
Fair value		3,940	[11],[20],[30]			3,940	[11],[20],[30]			$ 4,561	[14],[19],[29]
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 2
Schedule of Investments [Line Items]
PIK Rate	[14],[17],[19],[29]									16%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[17],[19],[29]					270
Ending balance	[11],[20],[30]	310				310
Fair value		$ 310	[11],[20],[30]			310	[11],[20],[30]			$ 270	[14],[17],[19],[29]
Investment, Identifier [Axis]: Berry Aviation, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[14]									12%
PIK Rate	[14]									1.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					$ 195
Fair value	[14]									$ 195
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		7%	[11],[12],[13],[18]			7%	[11],[12],[13],[18]			1%	[14],[15],[16],[17]
PIK Rate	[14],[15],[16],[17]									6%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (76)
Ending balance	[11],[12],[13],[18]	$ (69)				(69)
Fair value		$ (69)	[11],[12],[13],[18]			$ (69)	[11],[12],[13],[18]			$ (76)	[14],[15],[16],[17]
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.26%	[11],[12],[18]			12.26%	[11],[12],[18]			11.40%	[14],[15],[16]
Spread		7%	[11],[12],[18]			7%	[11],[12],[18]			1%	[14],[15],[16]
PIK Rate		6%	[11],[12],[18]			6%	[11],[12],[18]			6%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 27,505
Ending balance	[11],[12],[18]	$ 28,345				28,345
Fair value		28,345	[11],[12],[18]			28,345	[11],[12],[18]			$ 27,505	[14],[15],[16]
Investment, Identifier [Axis]: Binswanger Enterprises, LLC, Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					420
Ending balance	[11]	180				180
Fair value		180	[11]			180	[11]			420	[14]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[19]					4,860
Ending balance	[8]	2,265				2,265
Fair value		$ 2,265	[8]			$ 2,265	[8]			$ 4,860	[7],[19]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[8],[12]	15.75%				15.75%
Spread		7.50%	[8],[12]			7.50%	[8],[12]			8.50%	[7],[16],[17]
PIK Rate	[8],[12]	14.75%				14.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16],[17]					$ 0
Ending balance	[8],[12]	$ 1,333				1,333
Fair value		$ 1,333	[8],[12]			$ 1,333	[8],[12]			$ 0	[7],[16],[17]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.77%	[8],[12],[18]			13.77%	[8],[12],[18]			12.94%	[7],[16]
Spread		8.50%	[8],[12],[18]			8.50%	[8],[12],[18]			8.50%	[7],[16]
PIK Rate	[8],[12],[18]	12.77%				12.77%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]					$ 3,139
Ending balance	[8],[12],[18]	$ 3,210				3,210
Fair value		3,210	[8],[12],[18]			3,210	[8],[12],[18]			$ 3,139	[7],[16]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[9]					1,095
Ending balance	[8],[10]	510				510
Fair value		510	[8],[10]			510	[8],[10]			1,095	[7],[9]
Investment, Identifier [Axis]: Boccella Precast Products LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(620)		(320)
Amount of Interest, Fees or Dividends Credited to Income						41		70
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,970	[19]	4,830
Gross Additions						0		0
Gross Reductions						620		320
Ending balance		2,350		4,510		2,350		4,510
Fair value		$ 2,350		$ 4,510		$ 2,350		$ 4,510		$ 2,970	[19]
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10%		10%		10%		10%		10%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						16		16
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						320		320
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		$ 320		$ 320		320		320
Fair value		$ 320		320		$ 320		320		$ 320
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class B Preferred Member Units
Schedule of Investments [Line Items]
Total Rate		8%	[20]			8%	[20]			8%	[19]
Amount of Realized Gain/(Loss)						$ 0		0
Amount of Unrealized Gain/(Loss)						(300)		2,760
Amount of Interest, Fees or Dividends Credited to Income						2,137		276
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						31,420	[19]	23,170
Gross Additions						0		2,760
Gross Reductions						300		0
Ending balance		$ 31,120	[20]	25,930		31,120	[20]	25,930
Fair value		$ 31,120	[20]	$ 25,930		$ 31,120	[20]	$ 25,930		$ 31,420	[19]
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.37%	[12],[18],[31]	10.50%		14.37%	[12],[18],[31]	10.50%		13.39%	[15],[16],[32]
Spread		9.19%	[12],[18],[31]	9%		9.19%	[12],[18],[31]	9%		9.26%	[15],[16],[32]
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(39)
Amount of Interest, Fees or Dividends Credited to Income								2,491
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						$ 99,194	[15],[16],[32]	39,000
Gross Additions								10,233
Gross Reductions								39
Ending balance		$ 97,875	[12],[18],[31]	$ 49,194		97,875	[12],[18],[31]	49,194
Fair value		97,875	[12],[18],[31]	49,194		97,875	[12],[18],[31]	49,194		$ 99,194	[15],[16],[32]
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		0				0
Fair value		$ 0				$ 0				0
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.37%				14.37%
Spread		9.19%				9.19%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(71)
Amount of Interest, Fees or Dividends Credited to Income						6,976
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						99,194
Gross Additions						71
Gross Reductions						1,390
Ending balance		$ 97,875				97,875
Fair value		97,875				97,875				$ 99,194
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[33],[34]	571				571
Fair value	[11],[33],[34]	$ 571				$ 571
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[11],[12],[13],[18],[33],[34]	7%				7%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[13],[18],[33],[34]	$ (28)				$ (28)
Fair value	[11],[12],[13],[18],[33],[34]	$ (28)				$ (28)
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18],[33],[34]	11.19%				11.19%
Spread	[11],[12],[18],[33],[34]	6%				6%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18],[33],[34]	$ 6,297				$ 6,297
Fair value	[11],[12],[18],[33],[34]	$ 6,297				$ 6,297
Investment, Identifier [Axis]: Bond Brand Loyalty ULC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18],[33],[34]	13.19%				13.19%
Spread	[11],[12],[18],[33],[34]	8%				8%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18],[33],[34]	$ 6,297				$ 6,297
Fair value	[11],[12],[18],[33],[34]	$ 6,297				$ 6,297
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.50%	[11],[12],[21],[26]			12.50%	[11],[12],[21],[26]			12.50%	[14],[16],[22],[28]
Spread		9.25%	[11],[12],[21],[26]			9.25%	[11],[12],[21],[26]			9.25%	[14],[16],[22],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[22],[28]					$ 761
Ending balance	[11],[12],[21],[26]	$ 761				761
Fair value		$ 761	[11],[12],[21],[26]			$ 761	[11],[12],[21],[26]			$ 761	[14],[16],[22],[28]
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%	[11],[12],[21],[26]			12.50%	[11],[12],[21],[26]			12.50%	[14],[16],[22],[28]
Spread		9.25%	[11],[12],[21],[26]			9.25%	[11],[12],[21],[26]			9.25%	[14],[16],[22],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[22],[28]					$ 2,916
Ending balance	[11],[12],[21],[26]	$ 1,382				1,382
Fair value		1,382	[11],[12],[21],[26]			1,382	[11],[12],[21],[26]			$ 2,916	[14],[16],[22],[28]
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(720)		(660)
Amount of Interest, Fees or Dividends Credited to Income						60		530
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						7,080	[19]	7,710
Gross Additions						0		0
Gross Reductions						720		660
Ending balance		6,360	[20]	7,050		6,360	[20]	7,050
Fair value		$ 6,360	[20]	$ 7,050		$ 6,360	[20]	$ 7,050		$ 7,080	[19]
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.17%	[12]	11.06%		15.17%	[12]	11.06%		14.12%	[16]
Spread		10%	[12]	10%		10%	[12]	10%		10%	[16]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(63)		0
Amount of Interest, Fees or Dividends Credited to Income						429		448
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						5,964	[16]	8,037
Gross Additions						0		12
Gross Reductions						311		248
Ending balance		$ 5,653	[12]	$ 7,801		5,653	[12]	7,801
Fair value		5,653	[12]	7,801		5,653	[12]	7,801		$ 5,964	[16]
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						50		50
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,000	[19],[29]	1,000
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		1,000		1,000		1,000		1,000
Fair value		1,000		$ 1,000		1,000		$ 1,000		$ 1,000	[19],[29]
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Preferred Member Units 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[20],[30]	1,000				1,000
Fair value	[20],[30]	$ 1,000				$ 1,000
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13%		13%		13%		13%		13%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						576		576
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						8,813		8,813
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		$ 8,813		$ 8,813		8,813		8,813
Fair value		$ 8,813		$ 8,813		$ 8,813		$ 8,813		$ 8,813
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%	[30]	13%		13%	[30]	13%		13%	[29]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						65		65
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,000	[29]	1,000
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		$ 1,000	[30]	$ 1,000		1,000	[30]	1,000
Fair value		1,000	[30]	1,000		1,000	[30]	1,000		$ 1,000	[29]
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								200
Amount of Interest, Fees or Dividends Credited to Income								0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						4,340	[9]	4,060
Gross Additions								200
Gross Reductions								0
Ending balance		4,450	[10]	4,260		4,450	[10]	4,260
Fair value		4,450	[10]	$ 4,260		4,450	[10]	$ 4,260		4,340	[9]
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						46
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,828
Gross Additions						46
Gross Reductions						0
Ending balance		1,874				1,874
Fair value		1,874				1,874				1,828
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						64
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,512
Gross Additions						64
Gross Reductions						0
Ending balance		2,576				2,576
Fair value		2,576				2,576				2,512
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund III, LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19],[35],[36],[37]					4,727
Ending balance	[33],[38],[39]	4,586				4,586
Fair value		4,586	[33],[38],[39]			4,586	[33],[38],[39]			4,727	[19],[35],[36],[37]
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund IV, LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19],[35],[36],[37]					4,541
Ending balance	[20],[33],[38],[39]	4,589				4,589
Fair value		4,589	[20],[33],[38],[39]			4,589	[20],[33],[38],[39]			4,541	[19],[35],[36],[37]
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund V, LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[35],[36],[37]					2,229
Ending balance	[20],[33],[38],[39]	2,331				2,331
Fair value		$ 2,331	[20],[33],[38],[39]			$ 2,331	[20],[33],[38],[39]			$ 2,229	[35],[36],[37]
Investment, Identifier [Axis]: Buca C, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Total Rate		6%				6%				6%
PIK Rate		6%				6%				6%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		$ 0				0
Fair value		$ 0				$ 0				$ 0
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		10.37%		12%		10.37%		9%
Spread				9.25%				9.25%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						1,044		1,036
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						12,337		14,370
Gross Additions						0		0
Gross Reductions						373		1,221
Ending balance		$ 11,964		$ 13,149		11,964		13,149
Fair value		$ 11,964		13,149		$ 11,964		13,149		$ 12,337
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	10.20%				10.20%
Spread		5%	[11],[12],[18]			5%	[11],[12],[18]			5%	[14],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[17]					$ 0
Ending balance	[11],[12],[18]	$ 774				774
Fair value		$ 774	[11],[12],[18]			$ 774	[11],[12],[18]			$ 0	[14],[16],[17]
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.20%	[11],[12],[18]			10.20%	[11],[12],[18]			8.91%	[14],[16]
Spread		5%	[11],[12],[18]			5%	[11],[12],[18]			5%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 19,933
Ending balance	[11],[12],[18]	$ 19,782				19,782
Fair value		19,782	[11],[12],[18]			19,782	[11],[12],[18]			$ 19,933	[14],[16]
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19]					1,789
Ending balance		1,789				1,789
Fair value		1,789				1,789				1,789	[19]
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Ending balance		0				0
Fair value		0				0				0
Investment, Identifier [Axis]: CBT Nuggets, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						1,570		(2,720)
Amount of Interest, Fees or Dividends Credited to Income						1,647		1,647
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						49,002	[19]	50,620
Gross Additions						1,568		0
Gross Reductions						0		2,720
Ending balance		50,570	[20]	47,900		50,570	[20]	47,900
Fair value		50,570	[20]	47,900		50,570	[20]	47,900		49,002	[19]
Investment, Identifier [Axis]: CMS Minerals Investments, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						99		0
Amount of Unrealized Gain/(Loss)						(366)		447
Amount of Interest, Fees or Dividends Credited to Income						44		69
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,670	[19],[29]	1,974
Gross Additions						99		447
Gross Reductions						1,769		147
Ending balance		0		2,274		0		2,274
Fair value		$ 0		2,274		0		2,274		$ 1,670	[19],[29]
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[14],[16],[40]									11.99%
Spread	[14],[16],[40]									8.50%
PIK Rate	[14],[16],[40]									0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[40]					$ 28,328
Fair value	[14],[16],[40]									$ 28,328
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	13.91%				13.91%
Spread	[11],[12],[18]	6.50%				6.50%
PIK Rate	[11],[12],[18]	2%				2%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 5,044				$ 5,044
Fair value	[11],[12],[18]	$ 5,044				$ 5,044
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	13.91%				13.91%
Spread	[11],[12],[18]	6.50%				6.50%
PIK Rate	[11],[12],[18]	2%				2%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 1,569				$ 1,569
Fair value	[11],[12],[18]	$ 1,569				$ 1,569
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	13.91%				13.91%
Spread	[11],[12],[18]	6.50%				6.50%
PIK Rate	[11],[12],[18]	2%				2%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 2,064				$ 2,064
Fair value	[11],[12],[18]	$ 2,064				$ 2,064
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	13.91%				13.91%
Spread	[11],[12],[18]	6.50%				6.50%
PIK Rate	[11],[12],[18]	2%				2%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 594				$ 594
Fair value	[11],[12],[18]	594				594
Investment, Identifier [Axis]: Café Brazil, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(80)		(50)
Amount of Interest, Fees or Dividends Credited to Income						103		99
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,210	[19]	2,570
Gross Additions						0		0
Gross Reductions						80		50
Ending balance		2,130	[20]	2,520		2,130	[20]	2,520
Fair value		2,130	[20]	$ 2,520		2,130	[20]	$ 2,520		2,210	[19]
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate				15%				15%
PIK Rate				15%				15%
Amount of Realized Gain/(Loss)						0		$ 0
Amount of Unrealized Gain/(Loss)						(2,060)		0
Amount of Interest, Fees or Dividends Credited to Income						125		652
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						25,495	[19]	9,510
Gross Additions						0		652
Gross Reductions						2,060		6,449
Ending balance		23,435	[20]	$ 3,713		23,435	[20]	3,713
Fair value		$ 23,435	[20]	3,713		$ 23,435	[20]	3,713		$ 25,495	[19]
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Total Rate		15%	[20]			15%	[20]			15%	[19]
PIK Rate		15%	[20]			15%	[20]			15%	[19]
Amount of Realized Gain/(Loss)						$ 0		0
Amount of Unrealized Gain/(Loss)						0		6,020
Amount of Interest, Fees or Dividends Credited to Income						301		125
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,994	[19]	13,275
Gross Additions						301		6,020
Gross Reductions						0		0
Ending balance		$ 4,295	[20]	19,295		4,295	[20]	19,295
Fair value		$ 4,295	[20]	$ 19,295		$ 4,295	[20]	$ 19,295		$ 3,994	[19]
Investment, Identifier [Axis]: California Splendor Holdings LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.25%	[12]	11%		15.25%	[12]	11%		13.75%	[16]
Spread		10%	[12]	10%		10%	[12]	10%		10%	[16]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(7)		56
Amount of Interest, Fees or Dividends Credited to Income						2,127		1,578
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						28,000	[16]	27,915
Gross Additions						7		85
Gross Reductions						7		0
Ending balance		$ 28,000	[12]	$ 28,000		28,000	[12]	28,000
Fair value		$ 28,000	[12]	28,000		$ 28,000	[12]	28,000		$ 28,000	[16]
Investment, Identifier [Axis]: Camin Cargo Control, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.72%	[8],[12],[18]			11.72%	[8],[12],[18]			10.88%	[7],[16]
Spread		6.50%	[8],[12],[18]			6.50%	[8],[12],[18]			6.50%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]					$ 14,685
Ending balance	[8],[12],[18]	$ 14,608				14,608
Fair value		14,608	[8],[12],[18]			14,608	[8],[12],[18]			$ 14,685	[7],[16]
Investment, Identifier [Axis]: Career Team Holdings, LLC, Class A Common Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								4,499
Gross Additions								1
Gross Reductions								0
Ending balance				4,500				4,500
Fair value				$ 4,500				$ 4,500
Investment, Identifier [Axis]: Career Team Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						4,500
Gross Additions						0
Gross Reductions						0
Ending balance		4,500				4,500
Fair value		$ 4,500				$ 4,500				$ 4,500
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12.50%				12.50%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								1,296
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								20,050
Gross Additions								20
Gross Reductions								0
Ending balance				$ 20,070				20,070
Fair value				20,070				20,070
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[12]	11.25%				11.25%
Spread		6%	[12]			6%	[12]			6%	[16],[17]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						10
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[17]					(9)
Gross Additions						451
Gross Reductions						0
Ending balance	[12]	$ 442				442
Fair value		$ 442	[12]			$ 442	[12]			$ (9)	[16],[17]
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%				12.50%				12.50%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						1,293
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						20,090
Gross Additions						20
Gross Reductions						0
Ending balance		$ 20,110				20,110
Fair value		20,110				20,110				$ 20,090
Investment, Identifier [Axis]: CaseWorthy, Inc., Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					246
Ending balance	[11]	246				246
Fair value		$ 246	[11]			$ 246	[11]			$ 246	[14]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[11],[12],[13],[18]			6%	[11],[12],[13],[18]			6%	[14],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[17]					$ (11)
Ending balance	[11],[12],[13],[18]	$ (9)				(9)
Fair value		$ (9)	[11],[12],[13],[18]			$ (9)	[11],[12],[13],[18]			$ (11)	[14],[16],[17]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.54%	[11],[12],[18]			11.54%	[11],[12],[18]			10.73%	[14],[16]
Spread		6%	[11],[12],[18]			6%	[11],[12],[18]			6%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 7,914
Ending balance	[11],[12],[18]	$ 7,973				7,973
Fair value		$ 7,973	[11],[12],[18]			$ 7,973	[11],[12],[18]			$ 7,914	[14],[16]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.54%	[11],[12],[18]			11.54%	[11],[12],[18]			10.48%	[14],[16]
Spread		6%	[11],[12],[18]			6%	[11],[12],[18]			5.75%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 6,133
Ending balance	[11],[12],[18]	$ 6,133				6,133
Fair value		6,133	[11],[12],[18]			6,133	[11],[12],[18]			$ 6,133	[14],[16]
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						1,700		768
Amount of Interest, Fees or Dividends Credited to Income						60		60
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						8,700		5,840
Gross Additions						1,700		1,050
Gross Reductions						0		0
Ending balance		10,400		6,890		10,400		6,890
Fair value		$ 10,400		$ 6,890		$ 10,400		$ 6,890		$ 8,700
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%				12%
Spread				10%				10%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								507
Amount of Interest, Fees or Dividends Credited to Income								838
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								8,864
Gross Additions								7,903
Gross Reductions								1,826
Ending balance				$ 14,941				14,941
Fair value				14,941				14,941
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		9%	[12],[13]			9%	[12],[13]			9%	[16],[17]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						6
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[17]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[12],[13]	$ 0				0
Fair value		$ 0	[12],[13]			$ 0	[12],[13]			$ 0	[16],[17]
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.25%	[12]			14.25%	[12]			13.13%	[16]
Spread		9%	[12]			9%	[12]			9%	[16]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						64
Amount of Interest, Fees or Dividends Credited to Income						1,058
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16]					14,954
Gross Additions						76
Gross Reductions						0
Ending balance	[12]	$ 15,030				15,030
Fair value		15,030	[12]			15,030	[12]			$ 14,954	[16]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						1,020		(1,630)
Amount of Interest, Fees or Dividends Credited to Income						1,491		348
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						22,920	[19]	24,140
Gross Additions						1,020		0
Gross Reductions						0		1,630
Ending balance		23,940	[20]	22,510		23,940	[20]	22,510
Fair value		23,940	[20]	22,510		23,940	[20]	22,510		22,920	[19]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						120		0
Amount of Interest, Fees or Dividends Credited to Income						46		34
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,710	[19],[29]	1,540
Gross Additions						120		0
Gross Reductions						0		0
Ending balance		2,830	[20],[30]	1,540		2,830	[20],[30]	1,540
Fair value		$ 2,830	[20],[30]	$ 1,540		$ 2,830	[20],[30]	$ 1,540		$ 2,710	[19],[29]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				9.13%				9.13%
Spread				8%				8%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(35)
Amount of Interest, Fees or Dividends Credited to Income								845
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								17,817
Gross Additions								35
Gross Reductions								386
Ending balance				$ 17,466				17,466
Fair value				17,466				17,466
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[12],[13],[18]			6%	[12],[13],[18]			6%	[16],[17]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						77
Amount of Interest, Fees or Dividends Credited to Income						4
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[17]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[12],[13],[18]	$ 0				0
Fair value		$ 0	[12],[13],[18]			$ 0	[12],[13],[18]			$ 0	[16],[17]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.36%	[12],[18]			13.36%	[12],[18]			12.13%	[16]
Spread		8%	[12],[18]			8%	[12],[18]			8%	[16]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(6)
Amount of Interest, Fees or Dividends Credited to Income						1,092
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16]					16,945
Gross Additions						6
Gross Reductions						544
Ending balance	[12],[18]	$ 16,407				16,407
Fair value		16,407	[12],[18]			16,407	[12],[18]			$ 16,945	[16]
Investment, Identifier [Axis]: Chandler Signs Holdings, LLC, Class A Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						1,797		0
Amount of Unrealized Gain/(Loss)						(290)		160
Amount of Interest, Fees or Dividends Credited to Income						60		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,790	[14]	460
Gross Additions						1,797		160
Gross Reductions						3,587		0
Ending balance		0		620		0		620
Fair value		$ 0		620		$ 0		620		$ 1,790	[14]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.51%	[11],[12],[18],[41]			11.51%	[11],[12],[18],[41]			10.72%	[14],[15],[16],[42]
Spread		6.25%	[11],[12],[18],[41]			6.25%	[11],[12],[18],[41]			6.25%	[14],[15],[16],[42]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[42]					$ 1,841
Ending balance	[11],[12],[18],[41]	$ 3,877				3,877
Fair value		$ 3,877	[11],[12],[18],[41]			$ 3,877	[11],[12],[18],[41]			$ 1,841	[14],[15],[16],[42]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.39%	[11],[12],[18],[41]			11.39%	[11],[12],[18],[41]			10.71%	[14],[15],[16],[43]
Spread		6.25%	[11],[12],[18],[41]			6.25%	[11],[12],[18],[41]			6.25%	[14],[15],[16],[43]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[43]					$ 38,484
Ending balance	[11],[12],[18],[41]	$ 38,121				38,121
Fair value		$ 38,121	[11],[12],[18],[41]			$ 38,121	[11],[12],[18],[41]			$ 38,484	[14],[15],[16],[43]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	11.39%				11.39%
Spread	[11],[12],[18]	6.25%				6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 4,836				$ 4,836
Fair value	[11],[12],[18]	4,836				4,836
Investment, Identifier [Axis]: Charps, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						460		(540)
Amount of Interest, Fees or Dividends Credited to Income						246		417
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						13,340	[19]	13,990
Gross Additions						460		0
Gross Reductions						0		540
Ending balance		13,800	[20]	13,450		13,800	[20]	13,450
Fair value		$ 13,800	[20]	$ 13,450		$ 13,800	[20]	$ 13,450		$ 13,340	[19]
Investment, Identifier [Axis]: Charps, LLC, Unsecured Debt
Schedule of Investments [Line Items]
Total Rate		10%		10%		10%		10%		10%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(17)		(27)
Amount of Interest, Fees or Dividends Credited to Income						300		309
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						5,694		5,694
Gross Additions						17		27
Gross Reductions						17		27
Ending balance		$ 5,694		$ 5,694		5,694		5,694
Fair value		5,694		5,694		5,694		5,694		$ 5,694
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(1,840)		80
Amount of Interest, Fees or Dividends Credited to Income						275		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						8,220	[19]	530
Gross Additions						0		80
Gross Reductions						1,840		0
Ending balance		6,380	[20]	610		6,380	[20]	610
Fair value		6,380	[20]	610		6,380	[20]	610		8,220	[19]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						220		0
Amount of Interest, Fees or Dividends Credited to Income						0		764
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						610	[29]	10,250
Gross Additions						519		0
Gross Reductions						0		0
Ending balance		1,129	[30]	10,250		1,129	[30]	10,250
Fair value		1,129	[30]	$ 10,250		1,129	[30]	$ 10,250		$ 610	[29]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				10.63%				10.63%
Spread				9.50%				9.50%		9%	[15],[16],[17]
Amount of Realized Gain/(Loss)						0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						1		574
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0	[15],[16],[17]	10,401
Gross Additions						0		20
Gross Reductions						0		0
Ending balance		0	[13]	$ 10,421		0	[13]	10,421
Fair value		$ 0	[13]	$ 10,421		$ 0	[13]	$ 10,421		$ 0	[15],[16],[17]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.50%		10%		11.50%		10%		13.23%	[15],[16]
Spread	[15],[16]									9%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(64)		0
Amount of Interest, Fees or Dividends Credited to Income						621		54
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						10,440	[15],[16]	1,071
Gross Additions						18		0
Gross Reductions						824		16
Ending balance		$ 9,634		$ 1,055		9,634		1,055
Fair value		$ 9,634		1,055		$ 9,634		1,055		$ 10,440	[15],[16]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10%				10%				10%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						52
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,039
Gross Additions						0
Gross Reductions						17
Ending balance		$ 1,022				1,022
Fair value		$ 1,022				$ 1,022				$ 1,039
Investment, Identifier [Axis]: Clarius BIGS, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15%	[11],[21],[26]			15%	[11],[21],[26]			15%	[14],[22],[28]
PIK Rate		15%	[11],[21],[26]			15%	[11],[21],[26]			15%	[14],[22],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[22],[28]					$ 19
Ending balance	[11],[21],[26]	$ 22				22
Fair value		22	[11],[21],[26]			22	[11],[21],[26]			$ 19	[14],[22],[28]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(6,410)		8,530
Amount of Interest, Fees or Dividends Credited to Income						4,745		947
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						24,637	[19]	15,260
Gross Additions						0		8,530
Gross Reductions						6,407		0
Ending balance		18,230	[20]	23,790		18,230	[20]	23,790
Fair value		$ 18,230	[20]	$ 23,790		$ 18,230	[20]	$ 23,790		$ 24,637	[19]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.25%	[12]	7%		11.25%	[12]	7%		9.75%	[16]
Spread		6%	[12]	6%		6%	[12]	6%		6%	[16]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						260		349
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						4,560	[16]	4,000
Gross Additions						0		7,920
Gross Reductions						0		6,360
Ending balance		$ 4,560	[12]	$ 5,560		4,560	[12]	5,560
Fair value		$ 4,560	[12]	$ 5,560		$ 4,560	[12]	$ 5,560		$ 4,560	[16]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		8%		8%		8%		8%		8%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(21)		(21)
Amount of Interest, Fees or Dividends Credited to Income						797		797
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						19,274		19,274
Gross Additions						21		21
Gross Reductions						21		21
Ending balance		$ 19,274		$ 19,274		19,274		19,274
Fair value		19,274		19,274		19,274		19,274		$ 19,274
Investment, Identifier [Axis]: Cody Pools, Inc., Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						6,940		3,550
Amount of Interest, Fees or Dividends Credited to Income						1,446		1,749
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						58,180	[19],[29]	47,640
Gross Additions						6,940		3,550
Gross Reductions						0		0
Ending balance		65,120	[20],[30]	51,190		65,120	[20],[30]	51,190
Fair value		65,120	[20],[30]	$ 51,190		65,120	[20],[30]	$ 51,190		$ 58,180	[19],[29]
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate				12.25%				12.25%
Spread				10.50%				10.50%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(45)
Amount of Interest, Fees or Dividends Credited to Income								2,702
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								42,484
Gross Additions								2,910
Gross Reductions								3,757
Ending balance				$ 41,637				41,637
Fair value				41,637				41,637
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[16]									15.38%
Spread	[16]									10.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16]					1,462
Ending balance	[13]	0				0
Fair value		0	[13]			0	[13]			$ 1,462	[16]
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 1.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						12
Amount of Interest, Fees or Dividends Credited to Income						2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		0				0
Fair value		$ 0				$ 0				$ 0
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%				12.50%				15.38%	[16]
Spread	[16]									10.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16]					$ 40,801
Ending balance		$ 46,312				46,312
Fair value		46,312				46,312				$ 40,801	[16]
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 2.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						39
Amount of Interest, Fees or Dividends Credited to Income						582
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						46,312
Gross Reductions						0
Ending balance		46,312				46,312
Fair value		$ 46,312				$ 46,312				0
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Spread		10.50%				10.50%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(19)
Amount of Interest, Fees or Dividends Credited to Income						96
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,462
Gross Additions						32
Gross Reductions						1,494
Ending balance		$ 0				0
Fair value		$ 0				$ 0				1,462
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 4
Schedule of Investments [Line Items]
Spread		10.50%				10.50%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(280)
Amount of Interest, Fees or Dividends Credited to Income						2,683
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						40,801
Gross Additions						0
Gross Reductions						40,801
Ending balance		$ 0				0
Fair value		0				0				40,801
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								(190)
Amount of Interest, Fees or Dividends Credited to Income								805
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						9,160	[19]	9,130
Gross Additions								0
Gross Reductions								190
Ending balance				8,940				8,940
Fair value				$ 8,940				$ 8,940		9,160	[19]
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						1,440
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						2,400
Gross Reductions						0
Ending balance		2,400				2,400
Fair value		2,400				2,400				0
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		2,400				2,400
Fair value		2,400				2,400
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units 2.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						(1,480)
Amount of Interest, Fees or Dividends Credited to Income						(1,179)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						9,160
Gross Additions						0
Gross Reductions						1,480
Ending balance		7,680				7,680
Fair value		7,680				7,680				9,160
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units 3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		7,680				7,680
Fair value		7,680				7,680
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%				12%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								1,703
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								24,351
Gross Additions								1,630
Gross Reductions								630
Ending balance				$ 25,351				25,351
Fair value				25,351				25,351
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						47
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[17]					0
Gross Additions						1,600
Gross Reductions						1,600
Ending balance	[13]	0				0
Fair value		$ 0	[13]			$ 0	[13]			$ 0	[17]
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%				12%				12%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(500)
Amount of Interest, Fees or Dividends Credited to Income						1,406
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						23,151
Gross Additions						28
Gross Reductions						1,130
Ending balance		$ 22,049				22,049
Fair value		22,049				22,049				$ 23,151
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(3,450)		5,230
Amount of Interest, Fees or Dividends Credited to Income						158		316
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						19,830	[19]	12,000
Gross Additions						0		5,230
Gross Reductions						3,450		0
Ending balance		16,380	[20]	17,230		16,380	[20]	17,230
Fair value		$ 16,380	[20]	$ 17,230		$ 16,380	[20]	$ 17,230		$ 19,830	[19]
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.25%	[12]	10.13%		14.25%	[12]	10.13%
Spread		9%	[12]	9%		9%	[12]	9%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(10)
Amount of Interest, Fees or Dividends Credited to Income								308
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								6,477
Gross Additions								10
Gross Reductions								746
Ending balance		$ 4,869	[12]	$ 5,741		$ 4,869	[12]	5,741
Fair value		$ 4,869	[12]	5,741		$ 4,869	[12]	5,741
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		9%				9%				9%	[16],[17],[28]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[17],[28]					0
Gross Additions						0
Gross Reductions						0
Ending balance		$ 0				0
Fair value		$ 0				$ 0				$ 0	[16],[17],[28]
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.25%				14.25%				13.13%	[16]
Spread		9%				9%				9%	[16]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(5)
Amount of Interest, Fees or Dividends Credited to Income						355
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16]					5,241
Gross Additions						5
Gross Reductions						377
Ending balance		$ 4,869				4,869
Fair value		$ 4,869				$ 4,869				$ 5,241	[16]
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.71%	[11],[12],[44]			12.71%	[11],[12],[44]			12.56%	[14],[16],[45]
Spread		7.50%	[11],[12],[44]			7.50%	[11],[12],[44]			8%	[14],[16],[45]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[45]					$ 4,621
Ending balance	[11],[12],[44]	$ 4,682				4,682
Fair value		$ 4,682	[11],[12],[44]			$ 4,682	[11],[12],[44]			$ 4,621	[14],[16],[45]
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.82%	[11],[12]			12.82%	[11],[12]			12.56%	[14],[16]
Spread		7.50%	[11],[12]			7.50%	[11],[12]			8%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 17,178
Ending balance	[11],[12]	$ 17,277				17,277
Fair value		17,277	[11],[12]			17,277	[11],[12]			$ 17,178	[14],[16]
Investment, Identifier [Axis]: Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19],[35],[36],[37]					7,657
Ending balance	[20],[33],[38],[39]	5,562				5,562
Fair value		5,562	[20],[33],[38],[39]			5,562	[20],[33],[38],[39]			7,657	[19],[35],[36],[37]
Investment, Identifier [Axis]: Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(223)		(63)
Amount of Interest, Fees or Dividends Credited to Income						316		300
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						7,657		9,959
Gross Additions						0		0
Gross Reductions						2,095		1,660
Ending balance		5,562		8,299		5,562		8,299
Fair value		5,562		8,299		5,562		8,299		7,657
Investment, Identifier [Axis]: Construction Supply Investments, LLC, Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[19]					21,165
Ending balance	[11]	24,435				24,435
Fair value		24,435	[11]			24,435	[11]			21,165	[14],[19]
Investment, Identifier [Axis]: Copper Trail Fund Investments, LP Interests (CTMH, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						588	[35],[36],[37]	710
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		588	[33],[38],[39]	710		588	[33],[38],[39]	710
Fair value		588	[33],[38],[39]	710		588	[33],[38],[39]	710		588	[35],[36],[37]
Investment, Identifier [Axis]: Cybermedia Technologies, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						15,000
Gross Reductions						0
Ending balance		15,000				15,000
Fair value		15,000				15,000				0
Investment, Identifier [Axis]: Cybermedia Technologies, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance	[13]	0				0
Fair value		$ 0	[13]			$ 0	[13]			0
Investment, Identifier [Axis]: Cybermedia Technologies, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%				13%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						1,042
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						28,720
Gross Reductions						0
Ending balance		$ 28,720				28,720
Fair value		28,720				28,720				0
Investment, Identifier [Axis]: DMA Industries, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		976
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						7,260		5,944
Gross Additions						0		976
Gross Reductions						0		0
Ending balance		7,260		6,920		7,260		6,920
Fair value		$ 7,260		$ 6,920		$ 7,260		$ 6,920		$ 7,260
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%		12%		12%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(21)		186
Amount of Interest, Fees or Dividends Credited to Income						1,272		1,300
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						21,200		20,993
Gross Additions						21		207
Gross Reductions						1,221		0
Ending balance		$ 20,000		$ 21,200		20,000		21,200
Fair value		$ 20,000		21,200		$ 20,000		21,200		$ 21,200
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class A Preferred Member Units
Schedule of Investments [Line Items]
Total Rate		8%	[11]			8%	[11]			8%	[14]
PIK Rate		8%	[11]			8%	[11]			8%	[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					$ 380
Ending balance	[11]	$ 260				260
Fair value		$ 260	[11]			$ 260	[11]			$ 380	[14]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class AA Preferred Member Units (non-voting)
Schedule of Investments [Line Items]
Total Rate		10%	[11],[20]			10%	[11],[20]			10%	[14],[19]
PIK Rate		10%	[11],[20]			10%	[11],[20]			10%	[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[19]					$ 1,161
Ending balance	[11],[20]	$ 1,220				1,220
Fair value		1,220	[11],[20]			1,220	[11],[20]			$ 1,161	[14],[19]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[14],[16],[17]									7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[17]					(1)
Fair value	[14],[16],[17]									$ (1)
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[14],[16]									12.24%
Spread	[14],[16]									7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					5,934
Fair value	[14],[16]									$ 5,934
Investment, Identifier [Axis]: Dalton US Inc., Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					201
Ending balance	[11]	201				201
Fair value		$ 201	[11]			$ 201	[11]			$ 201	[14]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.69%	[11],[12],[18],[46]			13.69%	[11],[12],[18],[46]			11.90%	[14],[15],[16]
Spread		8.50%	[11],[12],[18],[46]			8.50%	[11],[12],[18],[46]			8%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 1,077
Ending balance	[11],[12],[18],[46]	$ 3,614				3,614
Fair value		$ 3,614	[11],[12],[18],[46]			$ 3,614	[11],[12],[18],[46]			$ 1,077	[14],[15],[16]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 2
Schedule of Investments [Line Items]
Spread		8.50%	[11],[12],[13],[18]			8.50%	[11],[12],[13],[18]			8%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (74)
Ending balance	[11],[12],[13],[18]	$ (66)				(66)
Fair value		$ (66)	[11],[12],[13],[18]			$ (66)	[11],[12],[13],[18]			$ (74)	[14],[15],[16],[17]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.69%	[11],[12],[18]			13.69%	[11],[12],[18]			12.56%	[14],[15],[16]
Spread		8.50%	[11],[12],[18]			8.50%	[11],[12],[18]			8%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 14,186
Ending balance	[11],[12],[18]	$ 14,270				14,270
Fair value		14,270	[11],[12],[18]			14,270	[11],[12],[18]			$ 14,186	[14],[15],[16]
Investment, Identifier [Axis]: Datacom, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(320)		60
Amount of Interest, Fees or Dividends Credited to Income						0		48
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,670	[19]	2,610
Gross Additions						0		60
Gross Reductions						320		0
Ending balance		2,350	[20]	2,670		2,350	[20]	2,670
Fair value		$ 2,350	[20]	$ 2,670		$ 2,350	[20]	$ 2,670		$ 2,670	[19]
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				7.50%				7.50%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								416
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								7,668
Gross Additions								84
Gross Reductions								135
Ending balance				$ 7,617				7,617
Fair value				7,617				7,617
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		7.50%				7.50%				7.50%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						18
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						223
Gross Additions						583
Gross Reductions						90
Ending balance		$ 716				716
Fair value		$ 716				$ 716				$ 223
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%				10%				7.50%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						507
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						7,789
Gross Additions						78
Gross Reductions						135
Ending balance		$ 7,732				7,732
Fair value		7,732				7,732				$ 7,789
Investment, Identifier [Axis]: Digital Products Holdings LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						100		100
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						9,835	[19]	9,835
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		9,835	[20]	9,835		9,835	[20]	9,835
Fair value		$ 9,835	[20]	$ 9,835		$ 9,835	[20]	$ 9,835		$ 9,835	[19]
Investment, Identifier [Axis]: Digital Products Holdings LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.25%	[12],[18]	11.13%		15.25%	[12],[18]	11.13%		14.13%	[16]
Spread		10%	[12],[18]	10%		10%	[12],[18]	10%		10%	[16]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						1,141		929
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						15,523	[16]	16,801
Gross Additions						0		23
Gross Reductions						790		661
Ending balance		$ 14,733	[12],[18]	$ 16,163		14,733	[12],[18]	16,163
Fair value		14,733	[12],[18]	16,163		14,733	[12],[18]	16,163		$ 15,523	[16]
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						1,130		3,200
Amount of Interest, Fees or Dividends Credited to Income						343		686
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						22,220	[19]	18,350
Gross Additions						1,130		3,200
Gross Reductions						0		0
Ending balance		23,350	[20]	21,550		23,350	[20]	21,550
Fair value		23,350	[20]	$ 21,550		23,350	[20]	$ 21,550		$ 22,220	[19]
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate				12.13%				12.13%
Spread				11%				11%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(20)
Amount of Interest, Fees or Dividends Credited to Income								1,551
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								24,048
Gross Additions								1,317
Gross Reductions								687
Ending balance				$ 24,678				24,678
Fair value				24,678				24,678
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread	[16],[17]									11%
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						(14)
Amount of Interest, Fees or Dividends Credited to Income						23
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[17]					0
Gross Additions						14
Gross Reductions						14
Ending balance	[13]	0				0
Fair value		$ 0	[13]			$ 0	[13]			$ 0	[16],[17]
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%				13%				15.13%	[16]
Spread	[16]									11%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(35)
Amount of Interest, Fees or Dividends Credited to Income						1,876
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16]					27,267
Gross Additions						35
Gross Reductions						837
Ending balance		$ 26,465				26,465
Fair value		26,465				26,465				$ 27,267	[16]
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners - A, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						241		0
Amount of Unrealized Gain/(Loss)						0		(546)
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,898	[35],[36],[37]	3,280
Gross Additions						241		0
Gross Reductions						287		546
Ending balance		2,852	[33],[38],[39]	2,734		2,852	[33],[38],[39]	2,734
Fair value		2,852	[33],[38],[39]	2,734		2,852	[33],[38],[39]	2,734		2,898	[35],[36],[37]
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						757		0
Amount of Unrealized Gain/(Loss)						156		(1,719)
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						9,127	[35],[36],[37]	10,329
Gross Additions						915		0
Gross Reductions						904		1,719
Ending balance		9,138	[33],[38],[39]	8,610		9,138	[33],[38],[39]	8,610
Fair value		9,138	[33],[38],[39]	8,610		9,138	[33],[38],[39]	8,610		9,127	[35],[36],[37]
Investment, Identifier [Axis]: Dos Rios Stone Products LLC, Class A Preferred Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						250		(290)
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,330	[14],[29]	640
Gross Additions						250		0
Gross Reductions						0		290
Ending balance		1,580	[11],[30]	350		1,580	[11],[30]	350
Fair value		1,580	[11],[30]	350		1,580	[11],[30]	350		1,330	[14],[29]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					0
Ending balance	[11]	0				0
Fair value		0	[11]			0	[11]			0	[14]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Preferred Equity 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					128
Ending balance	[11]	128				128
Fair value		128	[11]			128	[11]			128	[14]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Preferred Equity 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					0
Ending balance	[11]	0				0
Fair value		0	[11]			0	[11]			$ 0	[14]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[14],[15],[16]									9.18%
Spread	[14],[15],[16]									4.50%
PIK Rate	[14],[15],[16]									9.18%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					1,717
Ending balance	[11]	1				1
Fair value		$ 1	[11]			$ 1	[11]			$ 1,717	[14],[15],[16]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		9.70%	[11],[12],[18]			9.70%	[11],[12],[18]			11.18%	[14],[15],[16]
Spread		4.50%	[11],[12],[18]			4.50%	[11],[12],[18]			6.50%	[14],[15],[16]
PIK Rate		9.70%	[11],[12],[18]			9.70%	[11],[12],[18]			11.18%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 1,642
Ending balance	[11],[12],[18]	$ 1,798				1,798
Fair value		$ 1,798	[11],[12],[18]			$ 1,798	[11],[12],[18]			$ 1,642	[14],[15],[16]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	11.70%				11.70%
Spread	[11],[12],[18]	6.50%				6.50%
PIK Rate	[11],[12],[18]	11.70%				11.70%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 1,739				$ 1,739
Fair value	[11],[12],[18]	1,739				1,739
Investment, Identifier [Axis]: EIG Fund Investments, LP Interests (EIG Global Private Debt Fund-A, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						16		11
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						43		28
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,013	[19],[35],[36],[37]	547
Gross Additions						16		0
Gross Reductions						55		158
Ending balance		974	[20],[33],[38],[39]	389		974	[20],[33],[38],[39]	389
Fair value		$ 974	[20],[33],[38],[39]	389		$ 974	[20],[33],[38],[39]	389		$ 1,013	[19],[35],[36],[37]
Investment, Identifier [Axis]: EPIC Y-Grade Services, LP, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.36%	[8],[12],[18]			11.36%	[8],[12],[18]			10.70%	[7],[16]
Spread		6%	[8],[12],[18]			6%	[8],[12],[18]			6%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]					$ 6,141
Ending balance	[8],[12],[18]	$ 6,073				6,073
Fair value		$ 6,073	[8],[12],[18]			$ 6,073	[8],[12],[18]			$ 6,141	[7],[16]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.39%	[11],[12],[18]			13.39%	[11],[12],[18]			11.73%	[14],[16]
Spread		8%	[11],[12],[18]			8%	[11],[12],[18]			7%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 3,276
Ending balance	[11],[12],[18]	$ 3,219				3,219
Fair value		$ 3,219	[11],[12],[18]			$ 3,219	[11],[12],[18]			$ 3,276	[14],[16]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.39%	[11],[12],[18]			13.39%	[11],[12],[18]			11.73%	[14],[16]
Spread		8%	[11],[12],[18]			8%	[11],[12],[18]			7%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 4,916
Ending balance	[11],[12],[18]	$ 4,644				4,644
Fair value		$ 4,644	[11],[12],[18]			$ 4,644	[11],[12],[18]			$ 4,916	[14],[16]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.39%	[11],[12],[18]			13.39%	[11],[12],[18]			11.73%	[14],[16]
Spread		8%	[11],[12],[18]			8%	[11],[12],[18]			7%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 22,967
Ending balance	[11],[12],[18]	$ 21,695				21,695
Fair value		21,695	[11],[12],[18]			21,695	[11],[12],[18]			$ 22,967	[14],[16]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						364
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						7,603
Gross Additions						364
Gross Reductions						1,877
Ending balance		6,090				6,090
Fair value		6,090				6,090				7,603
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						112
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[29]					1,558
Gross Additions						112
Gross Reductions						0
Ending balance	[30]	1,670				1,670
Fair value		$ 1,670	[30]			$ 1,670	[30]			$ 1,558	[29]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[12],[13],[18]			6%	[12],[13],[18]			6%	[15],[16],[17]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						4
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[15],[16],[17]					(9)
Gross Additions						1
Gross Reductions						0
Ending balance	[12],[13],[18]	$ (8)				(8)
Fair value		$ (8)	[12],[13],[18]			$ (8)	[12],[13],[18]			$ (9)	[15],[16],[17]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%				12%				12%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						1,151
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						18,594
Gross Additions						19
Gross Reductions						0
Ending balance		$ 18,613				18,613
Fair value		$ 18,613				$ 18,613				$ 18,594
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		9%				9%				9%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						287
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						6,294
Gross Additions						1
Gross Reductions						21
Ending balance		$ 6,274				6,274
Fair value		$ 6,274				$ 6,274				$ 6,294
Investment, Identifier [Axis]: Emerald Technologies Acquisition Co, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.66%	[8],[12],[18]			11.66%	[8],[12],[18]			10.67%	[7],[15],[16]
Spread		6.25%	[8],[12],[18]			6.25%	[8],[12],[18]			6.25%	[7],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[15],[16]					$ 8,787
Ending balance	[8],[12],[18]	$ 8,821				8,821
Fair value		8,821	[8],[12],[18]			8,821	[8],[12],[18]			$ 8,787	[7],[15],[16]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund IX, L.P.)
Schedule of Investments [Line Items]
Total Rate	[19],[35],[36],[37]									0.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19],[35],[36],[37]					2,019
Ending balance	[20],[33],[38],[39]	1,631				1,631
Fair value		1,631	[20],[33],[38],[39]			1,631	[20],[33],[38],[39]			$ 2,019	[19],[35],[36],[37]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII Co-Investors, L.P.)
Schedule of Investments [Line Items]
Total Rate	[19],[35],[36],[37]									0.38%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19],[35],[36],[37]					1,037
Ending balance	[20],[33],[38],[39]	950				950
Fair value		950	[20],[33],[38],[39]			950	[20],[33],[38],[39]			$ 1,037	[19],[35],[36],[37]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII, L.P.)
Schedule of Investments [Line Items]
Total Rate	[19],[35],[36],[37]									0.14%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19],[35],[36],[37]					2,092
Ending balance	[20],[33],[38],[39]	1,984				1,984
Fair value		1,984	[20],[33],[38],[39]			1,984	[20],[33],[38],[39]			$ 2,092	[19],[35],[36],[37]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund X, L.P.)
Schedule of Investments [Line Items]
Total Rate	[19],[35],[36],[37]									0.15%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19],[35],[36],[37]					9,351
Ending balance	[20],[33],[38],[39]	6,862				6,862
Fair value		6,862	[20],[33],[38],[39]			6,862	[20],[33],[38],[39]			$ 9,351	[19],[35],[36],[37]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund II, L.P.)
Schedule of Investments [Line Items]
Total Rate	[35],[36],[37]									0.84%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[35],[36],[37]					1,688
Ending balance	[20],[33],[38],[39]	1,555				1,555
Fair value		1,555	[20],[33],[38],[39]			1,555	[20],[33],[38],[39]			$ 1,688	[35],[36],[37]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund III, L.P.)
Schedule of Investments [Line Items]
Total Rate	[19],[35],[36],[37]									0.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19],[35],[36],[37]					5,718
Ending balance	[20],[33],[38],[39]	5,102				5,102
Fair value		$ 5,102	[20],[33],[38],[39]			$ 5,102	[20],[33],[38],[39]			$ 5,718	[19],[35],[36],[37]
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.75%	[11],[12]			13.75%	[11],[12]			11.68%	[14],[15],[16]
Spread		5.50%	[11],[12]			5.50%	[11],[12]			6.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 131
Ending balance	[11],[12]	$ 655				655
Fair value		$ 655	[11],[12]			$ 655	[11],[12]			$ 131	[14],[15],[16]
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.76%	[11],[12],[18]			11.76%	[11],[12],[18]			10.92%	[14],[15],[16]
Spread		6.50%	[11],[12],[18]			6.50%	[11],[12],[18]			6.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 16,338
Ending balance	[11],[12],[18]	$ 16,216				16,216
Fair value		16,216	[11],[12],[18]			16,216	[11],[12],[18]			$ 16,338	[14],[15],[16]
Investment, Identifier [Axis]: Escalent, Inc., Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11]	663				663
Fair value	[11]	$ 663				$ 663
Investment, Identifier [Axis]: Escalent, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread	[11],[13],[16],[18]	8%				8%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[13],[16],[18]	$ (38)				$ (38)
Fair value	[11],[13],[16],[18]	$ (38)				$ (38)
Investment, Identifier [Axis]: Escalent, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[16],[18]	13.34%				13.34%
Spread	[11],[16],[18]	8%				8%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[16],[18]	$ 25,545				$ 25,545
Fair value	[11],[16],[18]	$ 25,545				$ 25,545
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.54%	[11],[12],[18],[30]			12.54%	[11],[12],[18],[30]			10.67%	[14],[16],[29]
Spread		7%	[11],[12],[18],[30]			7%	[11],[12],[18],[30]			7%	[14],[16],[29]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[29]					$ 3,507
Ending balance	[11],[12],[18],[30]	$ 3,566				3,566
Fair value		$ 3,566	[11],[12],[18],[30]			$ 3,566	[11],[12],[18],[30]			$ 3,507	[14],[16],[29]
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.54%	[11],[12],[18],[30]			12.54%	[11],[12],[18],[30]			10.67%	[14],[16],[29]
Spread		7%	[11],[12],[18],[30]			7%	[11],[12],[18],[30]			7%	[14],[16],[29]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[29]					$ 42,083
Ending balance	[11],[12],[18],[30]	$ 42,797				42,797
Fair value		42,797	[11],[12],[18],[30]			42,797	[11],[12],[18],[30]			$ 42,083	[14],[16],[29]
Investment, Identifier [Axis]: Flame King Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						6,770		3,010
Amount of Interest, Fees or Dividends Credited to Income						2,050		559
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						17,580	[19]	10,400
Gross Additions						6,770		3,010
Gross Reductions						0		0
Ending balance		24,350	[20]	13,410		24,350	[20]	13,410
Fair value		$ 24,350	[20]	$ 13,410		$ 24,350	[20]	$ 13,410		$ 17,580	[19]
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				7.50%				7.50%		10.75%	[16]
Spread		6.50%		6.50%		6.50%		6.50%		6.50%	[16]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(60)		68
Amount of Interest, Fees or Dividends Credited to Income						484		288
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						7,600	[16]	6,324
Gross Additions						60		1,276
Gross Reductions						7,660		0
Ending balance		$ 0		$ 7,600		0		7,600
Fair value		$ 0		$ 7,600		$ 0		$ 7,600		$ 7,600	[16]
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate				12%				12%		13.25%	[16]
Spread		9%		11%		9%		11%		9%	[16]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(162)		183
Amount of Interest, Fees or Dividends Credited to Income						1,583		1,300
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						21,200	[16]	20,996
Gross Additions						162		204
Gross Reductions						21,362		0
Ending balance		$ 0		$ 21,200		0		21,200
Fair value		$ 0		21,200		$ 0		21,200		$ 21,200	[16]
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.55%	[11],[18]			12.55%	[11],[18]			11.21%	[14],[15],[16]
Spread		7.50%	[11],[18]			7.50%	[11],[18]			7.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 736
Ending balance	[11],[18]	$ 982				982
Fair value		$ 982	[11],[18]			$ 982	[11],[18]			$ 736	[14],[15],[16]
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.69%	[11],[18]			12.69%	[11],[18]			12.19%	[14],[15],[16]
Spread		7.50%	[11],[18]			7.50%	[11],[18]			7.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 11,095
Ending balance	[11],[18]	$ 11,095				11,095
Fair value		11,095	[11],[18]			11,095	[11],[18]			$ 11,095	[14],[15],[16]
Investment, Identifier [Axis]: Freeport Financial Funds, LP Interests (Freeport Financial SBIC Fund LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[35],[36],[37]					3,483
Ending balance	[33],[38],[39]	3,628				3,628
Fair value		3,628	[33],[38],[39]			3,628	[33],[38],[39]			3,483	[35],[36],[37]
Investment, Identifier [Axis]: Freeport Financial Funds, LP Interests (Freeport First Lien Loan Fund III LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19],[35],[36],[37]					5,848
Ending balance	[20],[33],[38],[39]	5,312				5,312
Fair value		5,312	[20],[33],[38],[39]			5,312	[20],[33],[38],[39]			5,848	[19],[35],[36],[37]
Investment, Identifier [Axis]: Freeport Financial SBIC Fund LP, LP Interests (Freeport Financial SBIC Fund LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						145		(52)
Amount of Interest, Fees or Dividends Credited to Income						0		2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,483		6,078
Gross Additions						145		0
Gross Reductions						0		1,962
Ending balance		3,628		4,116		3,628		4,116
Fair value		3,628		4,116		3,628		4,116		3,483
Investment, Identifier [Axis]: Freeport Financial SBIC Fund LP, LP Interests (Freeport First Lien Loan Fund III LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		(57)
Amount of Interest, Fees or Dividends Credited to Income						291		242
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						5,848		7,231
Gross Additions						0		0
Gross Reductions						536		436
Ending balance		5,312		6,795		5,312		6,795
Fair value		5,312		6,795		5,312		6,795		5,848
Investment, Identifier [Axis]: Fuse, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]					0
Ending balance	[8]	0				0
Fair value		$ 0	[8]			$ 0	[8]			$ 0	[7]
Investment, Identifier [Axis]: Fuse, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%	[8]			12%	[8]			12%	[7]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]					$ 1,512
Ending balance	[8]	$ 1,374				1,374
Fair value		1,374	[8]			1,374	[8]			$ 1,512	[7]
Investment, Identifier [Axis]: GFG Group, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						1,170		0
Amount of Interest, Fees or Dividends Credited to Income						102		378
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						7,140		6,990
Gross Additions						1,170		0
Gross Reductions						0		0
Ending balance		8,310	[20]	6,990		8,310	[20]	6,990
Fair value		$ 8,310	[20]	$ 6,990		$ 8,310	[20]	$ 6,990		7,140
Investment, Identifier [Axis]: GFG Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		9%		9%		9%		9%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(12)		(13)
Amount of Interest, Fees or Dividends Credited to Income						525		675
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						11,345		12,545
Gross Additions						12		13
Gross Reductions						12		13
Ending balance		$ 11,345		$ 12,545		11,345		12,545
Fair value		11,345		12,545		11,345		12,545		11,345
Investment, Identifier [Axis]: GFG Group, LLC., Preferred Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19]					7,140
Fair value	[19]									$ 7,140
Investment, Identifier [Axis]: GFG Group, LLC., Secured Debt
Schedule of Investments [Line Items]
Total Rate										9%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						11,345
Fair value										$ 11,345
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						84		2,441
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						44,440	[19]	46,190
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		44,440		46,190		44,440		46,190
Fair value		$ 44,440		$ 46,190		$ 44,440		$ 46,190		$ 44,440	[19]
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				9.06%				9.06%
Spread				8%				8%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(22)
Amount of Interest, Fees or Dividends Credited to Income								1,676
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								38,885
Gross Additions								22
Gross Reductions								22
Ending balance				$ 38,885				38,885
Fair value				38,885				38,885
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.17%				11.17%				10.12%
Spread		6%				6%				6%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						66
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						670
Gross Additions						630
Gross Reductions						0
Ending balance		$ 1,300				1,300
Fair value		$ 1,300				$ 1,300				$ 670
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.17%				13.17%				12.12%
Spread		8%				8%				8%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(23)
Amount of Interest, Fees or Dividends Credited to Income						2,624
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						40,493
Gross Additions						23
Gross Reductions						23
Ending balance		$ 40,493				40,493
Fair value		$ 40,493				$ 40,493				$ 40,493
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[14],[16]									11.20%
Spread		6.50%	[11],[12],[13],[18]			6.50%	[11],[12],[13],[18]			6.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 2,171
Ending balance	[11],[12],[13],[18]	$ (6)				(6)
Fair value		(6)	[11],[12],[13],[18]			(6)	[11],[12],[13],[18]			$ 2,171	[14],[16]
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[14],[16]									11.24%
Spread	[14],[16]									6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					10,705
Ending balance	[11],[13]	(14)				(14)
Fair value		$ (14)	[11],[13]			$ (14)	[11],[13]			$ 10,705	[14],[16]
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	11.70%				11.70%
Spread	[11],[12],[18]	6.50%				6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 10,679				$ 10,679
Fair value	[11],[12],[18]	$ 10,679				$ 10,679
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.14%	[11],[12],[18],[47]			11.14%	[11],[12],[18],[47]			10.42%	[14],[15],[16]
Spread		5.75%	[11],[12],[18],[47]			5.75%	[11],[12],[18],[47]			6%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 252
Ending balance	[11],[12],[18],[47]	$ 303				303
Fair value		$ 303	[11],[12],[18],[47]			$ 303	[11],[12],[18],[47]			$ 252	[14],[15],[16]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	11.14%				11.14%
Spread		5.75%	[11],[12],[18]			5.75%	[11],[12],[18]			6%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (15)
Ending balance	[11],[12],[18]	$ 303				303
Fair value		$ 303	[11],[12],[18]			$ 303	[11],[12],[18]			$ (15)	[14],[15],[16],[17]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.14%	[11],[12],[18]			11.14%	[11],[12],[18]			10.73%	[14],[15],[16]
Spread		5.75%	[11],[12],[18]			5.75%	[11],[12],[18]			6%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 3,661
Ending balance	[11],[12],[18]	$ 3,642				3,642
Fair value		3,642	[11],[12],[18]			3,642	[11],[12],[18]			$ 3,661	[14],[15],[16]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						19,270		(3,400)
Amount of Interest, Fees or Dividends Credited to Income						2,904		360
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						50,890	[19]	49,700
Gross Additions						19,270		0
Gross Reductions						0		3,400
Ending balance		70,160	[20]	46,300		70,160	[20]	46,300
Fair value		$ 70,160	[20]	$ 46,300		$ 70,160	[20]	$ 46,300		$ 50,890	[19]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				10.50%				10.50%
Spread				8%				8%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(11)
Amount of Interest, Fees or Dividends Credited to Income								1,100
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								21,598
Gross Additions								11
Gross Reductions								11
Ending balance				$ 21,598				21,598
Fair value				21,598				21,598
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		8.50%	[12],[13],[18],[24]			8.50%	[12],[13],[18],[24]			8.50%	[15],[16],[17]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						3
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[15],[16],[17]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[12],[13],[18],[24]	$ 0				0
Fair value		$ 0	[12],[13],[18],[24]			$ 0	[12],[13],[18],[24]			$ 0	[15],[16],[17]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11%	[12],[18],[24]			11%	[12],[18],[24]			11.50%	[15],[16]
Spread		8%	[12],[18],[24]			8%	[12],[18],[24]			8.50%	[15],[16]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(64)
Amount of Interest, Fees or Dividends Credited to Income						3,598
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[15],[16]					64,078
Gross Additions						64
Gross Reductions						4,464
Ending balance	[12],[18],[24]	$ 59,678				59,678
Fair value		59,678	[12],[18],[24]			59,678	[12],[18],[24]			$ 64,078	[15],[16]
Investment, Identifier [Axis]: Garreco, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(220)		220
Amount of Interest, Fees or Dividends Credited to Income						25		321
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,800	[19]	2,270
Gross Additions						0		220
Gross Reductions						220		0
Ending balance		1,580		2,490		1,580		2,490
Fair value		$ 1,580		$ 2,490		$ 1,580		$ 2,490		$ 1,800	[19]
Investment, Identifier [Axis]: Garreco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%	[12],[48]	9%		12%	[12],[48]	9%		9.50%	[16],[49]
Spread		10%	[12],[48]	8%		10%	[12],[48]	8%		8%	[16],[49]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						218		190
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,826	[16],[49]	4,196
Gross Additions						0		0
Gross Reductions						554		0
Ending balance		$ 3,272	[12],[48]	$ 4,196		3,272	[12],[48]	4,196
Fair value		$ 3,272	[12],[48]	4,196		$ 3,272	[12],[48]	4,196		$ 3,826	[16],[49]
Investment, Identifier [Axis]: GeoStabilization International (GSI), Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.17%	[8],[18]			10.17%	[8],[18]			9.44%	[7],[15]
Spread		5.25%	[8],[18]			5.25%	[8],[18]			5.25%	[7],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[15]					$ 19,472
Ending balance	[8],[18]	$ 19,831				19,831
Fair value		19,831	[8],[18]			19,831	[8],[18]			$ 19,472	[7],[15]
Investment, Identifier [Axis]: Gulf Manufacturing, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						1,210		(130)
Amount of Interest, Fees or Dividends Credited to Income						1,351		985
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						6,790	[19]	5,640
Gross Additions						1,210		0
Gross Reductions						0		130
Ending balance		8,000	[20]	5,510		8,000	[20]	5,510
Fair value		8,000	[20]	$ 5,510		8,000	[20]	$ 5,510		6,790	[19]
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		0				0
Fair value		0				0				0
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,780
Gross Additions						0
Gross Reductions						0
Ending balance		3,780				3,780
Fair value		$ 3,780				$ 3,780				$ 3,780
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				10.60%				10.60%
Spread		9.50%	[12],[13]			9.50%	[12],[13]			9.50%	[16],[17]
PIK Rate				5.25%				5.25%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						0		7
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0	[16],[17]	257
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		$ 0	[12],[13]	$ 257		0	[12],[13]	257
Fair value		$ 0	[12],[13]	$ 257		$ 0	[12],[13]	$ 257		$ 0	[16],[17]
Investment, Identifier [Axis]: Gulf Publishing Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%		12.50%		12.50%		12.50%		12.50%
PIK Rate				6.25%				6.25%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		(2,188)
Amount of Interest, Fees or Dividends Credited to Income						151		426
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,284		9,717
Gross Additions						0		0
Gross Reductions						0		2,188
Ending balance		$ 2,284		$ 7,529		2,284		7,529
Fair value		$ 2,284		7,529		$ 2,284		7,529		$ 2,284
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		14.34%	[11],[12],[18]			14.34%	[11],[12],[18]			14.34%	[14],[15],[16]
Spread		9.50%	[11],[12],[18]			9.50%	[11],[12],[18]			9.50%	[14],[15],[16]
PIK Rate		14.34%	[11],[12],[18]			14.34%	[11],[12],[18]			2%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 311
Ending balance	[11],[12],[18]	$ 315				315
Fair value		$ 315	[11],[12],[18]			$ 315	[11],[12],[18]			$ 311	[14],[15],[16]
Investment, Identifier [Axis]: HDC/HW Intermediate Holdings, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		14.34%	[11],[12],[18]			14.34%	[11],[12],[18]			14.34%	[14],[15],[16]
Spread		9.50%	[11],[12],[18]			9.50%	[11],[12],[18]			9.50%	[14],[15],[16]
PIK Rate		14.34%	[11],[12],[18]			14.34%	[11],[12],[18]			2%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 3,186
Ending balance	[11],[12],[18]	$ 3,188				3,188
Fair value		$ 3,188	[11],[12],[18]			$ 3,188	[11],[12],[18]			$ 3,186	[14],[15],[16]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.50%	[11],[12],[13],[18]			6.50%	[11],[12],[13],[18]			6.50%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (62)
Ending balance	[11],[12],[13],[18]	$ (55)				(55)
Fair value		$ (55)	[11],[12],[13],[18]			$ (55)	[11],[12],[13],[18]			$ (62)	[14],[15],[16],[17]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 2
Schedule of Investments [Line Items]
Spread		6.50%	[11],[12],[13],[18]			6.50%	[11],[12],[13],[18]			6.50%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (62)
Ending balance	[11],[12],[13],[18]	$ (55)				(55)
Fair value		$ (55)	[11],[12],[13],[18]			$ (55)	[11],[12],[13],[18]			$ (62)	[14],[15],[16],[17]
Investment, Identifier [Axis]: HEADLANDS OP-CO LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.60%	[11],[12],[18]			11.60%	[11],[12],[18]			10.62%	[14],[15],[16]
Spread		6.50%	[11],[12],[18]			6.50%	[11],[12],[18]			6.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 16,791
Ending balance	[11],[12],[18]	$ 16,706				16,706
Fair value		$ 16,706	[11],[12],[18]			$ 16,706	[11],[12],[18]			$ 16,791	[14],[15],[16]
Investment, Identifier [Axis]: HOWLCO LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.32%	[8],[12],[18],[33],[34]			11.32%	[8],[12],[18],[33],[34]			10.69%	[7],[16],[36],[50]
Spread		6%	[8],[12],[18],[33],[34]			6%	[8],[12],[18],[33],[34]			6%	[7],[16],[36],[50]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16],[36],[50]					$ 24,381
Ending balance	[8],[12],[18],[33],[34]	$ 24,464				24,464
Fair value		24,464	[8],[12],[18],[33],[34]			24,464	[8],[12],[18],[33],[34]			$ 24,381	[7],[16],[36],[50]
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (423 COR, LP)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						117		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,400		0
Gross Additions						0		1,400
Gross Reductions						0		0
Ending balance		1,400		1,400		1,400		1,400
Fair value		1,400		1,400		1,400		1,400		1,400
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (HPEP 3, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		779
Amount of Unrealized Gain/(Loss)						283		(21)
Amount of Interest, Fees or Dividends Credited to Income						0		(80)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						4,331		4,712
Gross Additions						283		0
Gross Reductions						508		381
Ending balance		4,106		4,331		4,106		4,331
Fair value		4,106		4,331		4,106		4,331		4,331
Investment, Identifier [Axis]: HPEP 3, L.P., LP Interests (HPEP 4, L.P.)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,332
Gross Additions						464
Gross Reductions						0
Ending balance		2,796				2,796
Fair value		2,796				2,796				2,332
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (2717 HPP-MS, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[35],[36],[37]					248
Ending balance	[33],[38],[39]	315				315
Fair value		315	[33],[38],[39]			315	[33],[38],[39]			248	[35],[36],[37]
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (2717 MH, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[35],[36],[37]					7,552
Ending balance	[20],[33],[38],[39]	6,346				6,346
Fair value		6,346	[20],[33],[38],[39]			6,346	[20],[33],[38],[39]			7,552	[35],[36],[37]
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (423 COR, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[20],[33],[38],[39]	1,400				1,400
Fair value	[20],[33],[38],[39]	1,400				1,400
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (423 COR, LP)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[35],[36],[37]					1,400
Fair value	[35],[36],[37]									1,400
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (423 HAR, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[33],[38],[39]	750				750
Fair value	[33],[38],[39]	750				750
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (HPEP 3, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[35],[36],[37]					4,331
Ending balance	[20],[33],[38],[39]	4,106				4,106
Fair value		4,106	[20],[33],[38],[39]			4,106	[20],[33],[38],[39]			4,331	[35],[36],[37]
Investment, Identifier [Axis]: Harris Preston Fund Investments, LP Interests (HPEP 4, L.P.)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[35],[36],[37]					2,332
Ending balance	[33],[38],[39]	2,796				2,796
Fair value		2,796	[33],[38],[39]			2,796	[33],[38],[39]			2,332	[35],[36],[37]
Investment, Identifier [Axis]: Harrison Hydra-Gen, Ltd., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						210		(200)
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,280		3,530
Gross Additions						210		0
Gross Reductions						0		200
Ending balance		3,490		3,330		3,490		3,330
Fair value		3,490		3,330		3,490		3,330		3,280
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		5,350
Amount of Interest, Fees or Dividends Credited to Income						131		704
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						17,460	[19]	14,680
Gross Additions						0		5,350
Gross Reductions						0		0
Ending balance		17,460	[20]	20,030		17,460	[20]	20,030
Fair value		17,460	[20]	20,030		17,460	[20]	20,030		17,460	[19]
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		280
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						920	[29]	771
Gross Additions						0		279
Gross Reductions						0		0
Ending balance		920	[30]	1,050		920	[30]	1,050
Fair value		$ 920	[30]	$ 1,050		$ 920	[30]	$ 1,050		$ 920	[29]
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.53%	[12],[18]	7.13%		11.53%	[12],[18]	7.13%		10.13%	[16]
Spread		6%	[12],[18]	6%		6%	[12],[18]	6%		6%	[16]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						173		94
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,185	[16]	2,585
Gross Additions						4,581		0
Gross Reductions						4,100		0
Ending balance		$ 3,666	[12],[18]	$ 2,585		3,666	[12],[18]	2,585
Fair value		$ 3,666	[12],[18]	$ 2,585		$ 3,666	[12],[18]	$ 2,585		$ 3,185	[16]
Investment, Identifier [Axis]: Hawk Ridge Systems, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%		8%		12.50%		8%		9%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						4		(16)
Amount of Interest, Fees or Dividends Credited to Income						2,173		1,416
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						37,800		34,800
Gross Additions						4,142		16
Gross Reductions						0		16
Ending balance		$ 41,942		$ 34,800		41,942		34,800
Fair value		41,942		34,800		41,942		34,800		$ 37,800
Investment, Identifier [Axis]: Heartland Dental, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[14],[16]									10.88%
Spread	[14],[16]									6.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					13,599
Fair value	[14],[16]									$ 13,599
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						1,160		(690)
Amount of Interest, Fees or Dividends Credited to Income						2		16
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,400		3,210
Gross Additions						1,160		0
Gross Reductions						0		690
Ending balance		3,560		2,520		3,560		2,520
Fair value		$ 3,560		$ 2,520		$ 3,560		$ 2,520		$ 2,400
Investment, Identifier [Axis]: Houston Plating and Coatings, LLC, Unsecured Convertible Debt
Schedule of Investments [Line Items]
Total Rate		8%		8%		8%		8%		8%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(170)		(210)
Amount of Interest, Fees or Dividends Credited to Income						121		121
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,000		2,960
Gross Additions						0		0
Gross Reductions						170		210
Ending balance		$ 2,830		$ 2,750		2,830		2,750
Fair value		$ 2,830		$ 2,750		$ 2,830		$ 2,750		$ 3,000
Investment, Identifier [Axis]: Hybrid Promotions, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.76%	[11],[12],[18]			15.76%	[11],[12],[18]			12.07%	[14],[15]
Spread		10.25%	[11],[12],[18]			10.25%	[11],[12],[18]			8.25%	[14],[15]
PIK Rate	[11],[12],[18]	2%				2%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15]					$ 6,144
Ending balance	[11],[12],[18]	$ 5,716				5,716
Fair value		$ 5,716	[11],[12],[18]			$ 5,716	[11],[12],[18]			$ 6,144	[14],[15]
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 21.75% profits interest)
Schedule of Investments [Line Items]
Total Rate	[19],[35],[36]									20%
Diluted, percentage		20%	[33],[38]			20%	[33],[38]			20%	[35],[36]
Profits, percentage		21.75%	[33],[38]			21.75%	[33],[38]			21.75%	[35],[36]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19],[35],[36]					$ 11,758
Ending balance	[20],[33],[38]	$ 11,751				11,751
Fair value		$ 11,751	[20],[33],[38]			$ 11,751	[20],[33],[38]			$ 11,758	[19],[35],[36]
Investment, Identifier [Axis]: I-45 SLF LLC, Member Units (Fully diluted 20.0%; 21.75% profits interest)
Schedule of Investments [Line Items]
Diluted, percentage		20%		20%		20%		20%
Profits, percentage		21.75%		21.75%		21.75%		21.75%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(1,207)		(1,438)
Amount of Interest, Fees or Dividends Credited to Income						1,123		943
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						11,758		14,387
Gross Additions						1,200		0
Gross Reductions						1,207		1,438
Ending balance		$ 11,751		$ 12,949		11,751		12,949
Fair value		11,751		12,949		11,751		12,949		11,758
Investment, Identifier [Axis]: IG Investor, LLC, Common Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						15,096
Gross Reductions						0
Ending balance		15,096				15,096
Fair value		15,096				15,096				0
Investment, Identifier [Axis]: IG Investor, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						84
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						761
Gross Reductions						800
Ending balance	[13]	(39)				(39)
Fair value		$ (39)	[13]			$ (39)	[13]			0
Investment, Identifier [Axis]: IG Investor, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%				13%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						896
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						37,333
Gross Reductions						0
Ending balance		$ 37,333				37,333
Fair value		$ 37,333				$ 37,333				$ 0
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[7],[15],[16],[51]									10.17%
Spread		5.75%	[8],[12],[13],[18]			5.75%	[8],[12],[13],[18]			5.75%	[7],[15],[16],[51]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[15],[16],[51]					$ 698
Ending balance	[8],[12],[13],[18]	$ 0				0
Fair value		$ 0	[8],[12],[13],[18]			$ 0	[8],[12],[13],[18]			$ 698	[7],[15],[16],[51]
Investment, Identifier [Axis]: IG Parent Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.95%	[8],[12],[18]			10.95%	[8],[12],[18]			10.17%	[7],[15],[16]
Spread		5.75%	[8],[12],[18]			5.75%	[8],[12],[18]			5.75%	[7],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[15],[16]					$ 14,499
Ending balance	[8],[12],[18]	$ 14,426				14,426
Fair value		$ 14,426	[8],[12],[18]			$ 14,426	[8],[12],[18]			$ 14,499	[7],[15],[16]
Investment, Identifier [Axis]: INW Manufacturing, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.29%	[8],[12],[18]			11.29%	[8],[12],[18]			10.48%	[7],[16]
Spread		5.75%	[8],[12],[18]			5.75%	[8],[12],[18]			5.75%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]					$ 6,092
Ending balance	[8],[12],[18]	$ 5,504				5,504
Fair value		$ 5,504	[8],[12],[18]			$ 5,504	[8],[12],[18]			$ 6,092	[7],[16]
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[13],[18]	9%				9%
PIK Rate	[13],[18]	2%				2%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						12
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						12
Ending balance	[13],[18]	$ (12)				(12)
Fair value		$ (12)	[13],[18]			$ (12)	[13],[18]			0
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Spread	[13],[18]	9%				9%
PIK Rate	[13],[18]	2%				2%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						10
Ending balance	[13],[18]	$ (10)				(10)
Fair value		$ (10)	[13],[18]			$ (10)	[13],[18]			0
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[18]	15.38%				15.38%
Spread	[18]	8%				8%
PIK Rate	[18]	2%				2%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						84
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						3,252
Gross Reductions						0
Ending balance	[18]	$ 3,252				3,252
Fair value		$ 3,252	[18]			$ 3,252	[18]			0
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate	[18]	17.38%				17.38%
Spread	[18]	10%				10%
PIK Rate	[18]	2%				2%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						86
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						3,252
Gross Reductions						0
Ending balance	[18]	$ 3,252				3,252
Fair value		3,252	[18]			3,252	[18]			0
Investment, Identifier [Axis]: ITA Holdings Group, LLC, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						2,091
Gross Reductions						0
Ending balance	[10]	2,091				2,091
Fair value		2,091	[10]			2,091	[10]			$ 0
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C., Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11]	1,166				1,166
Fair value	[11]	$ 1,166				$ 1,166
Investment, Identifier [Axis]: Imaging Business Machines, L.L.C., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	12.24%				12.24%
Spread	[11],[12],[18]	7%				7%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 20,167				$ 20,167
Fair value	[11],[12],[18]	$ 20,167				$ 20,167
Investment, Identifier [Axis]: Implus Footcare, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14.65%	[11],[12],[18]			14.65%	[11],[12],[18]			13.98%	[14],[16]
Spread		7.75%	[11],[12],[18]			7.75%	[11],[12],[18]			7.75%	[14],[16]
PIK Rate		1.50%	[11],[12],[18]			1.50%	[11],[12],[18]			1.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 17,464
Ending balance	[11],[12],[18]	$ 16,591				16,591
Fair value		16,591	[11],[12],[18]			16,591	[11],[12],[18]			$ 17,464	[14],[16]
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Common Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						18,300
Gross Reductions						0
Ending balance	[11]	18,300				18,300
Fair value		18,300	[11]			18,300	[11]			0
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					0
Fair value	[14]									$ 0
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Preferred Stock (non-voting) 1
Schedule of Investments [Line Items]
Total Rate	[14]									6%
PIK Rate	[14]									6%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					0
Fair value	[14]									$ 0
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Preferred Stock (non-voting) 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					0
Fair value	[14]									$ 0
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[14],[16],[52]									13%
Spread	[14],[16],[52]									5.50%
PIK Rate	[14],[16],[52]									13%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[52]					7,027
Fair value	[14],[16],[52]									$ 7,027
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[14],[22]									6%
PIK Rate	[14],[22]									6%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[22]					7,633
Fair value	[14],[22]									$ 7,633
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[14],[15]									14.42%
Spread	[14],[15]									10%
PIK Rate	[14],[15]									14.42%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15]					769
Fair value	[14],[15]									$ 769
Investment, Identifier [Axis]: Independent Pet Partners Intermediate Holdings, LLC, Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[17],[53]					0
Fair value	[14],[17],[53]									0
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[29]					600
Ending balance	[11],[30]	600				600
Fair value		$ 600	[11],[30]			$ 600	[11],[30]			$ 600	[14],[29]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Total Rate		10%	[11],[20],[30]			10%	[11],[20],[30]			10%	[14],[19],[29]
PIK Rate		10%	[11],[20],[30]			10%	[11],[20],[30]			10%	[14],[19],[29]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[19],[29]					$ 145
Ending balance	[11],[20],[30]	$ 149				149
Fair value		$ 149	[11],[20],[30]			$ 149	[11],[20],[30]			$ 145	[14],[19],[29]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Total Rate		20%	[11],[20],[30]			20%	[11],[20],[30]			20%	[14],[19],[29]
PIK Rate		20%	[11],[20],[30]			20%	[11],[20],[30]			20%	[14],[19],[29]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[19],[29]					$ 93
Ending balance	[11],[20],[30]	$ 98				98
Fair value		$ 98	[11],[20],[30]			$ 98	[11],[20],[30]			$ 93	[14],[19],[29]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.25%	[11],[12],[18]			12.25%	[11],[12],[18]			11.50%	[14],[16]
Spread		6.75%	[11],[12],[18]			6.75%	[11],[12],[18]			6.75%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 463
Ending balance	[11],[12],[18]	$ 1,004				1,004
Fair value		$ 1,004	[11],[12],[18]			$ 1,004	[11],[12],[18]			$ 463	[14],[16]
Investment, Identifier [Axis]: Industrial Services Acquisition, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.25%	[11],[12],[18]			12.25%	[11],[12],[18]			11.50%	[14],[16]
Spread		6.75%	[11],[12],[18]			6.75%	[11],[12],[18]			6.75%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 19,239
Ending balance	[11],[12],[18]	$ 19,142				19,142
Fair value		19,142	[11],[12],[18]			19,142	[11],[12],[18]			$ 19,239	[14],[16]
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						4,000
Gross Reductions						0
Ending balance		4,000				4,000
Fair value		$ 4,000				$ 4,000				0
Investment, Identifier [Axis]: Infinity X1 Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13%				13%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						790
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						17,832
Gross Reductions						0
Ending balance		$ 17,832				17,832
Fair value		$ 17,832				$ 17,832				$ 0
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	10.70%				10.70%
Spread		5.50%	[11],[12],[18]			5.50%	[11],[12],[18]			5.50%	[14],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[17]					$ (19)
Ending balance	[11],[12],[18]	$ 1,481				1,481
Fair value		$ 1,481	[11],[12],[18]			$ 1,481	[11],[12],[18]			$ (19)	[14],[16],[17]
Investment, Identifier [Axis]: Infolinks Media Buyco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.70%	[11],[12],[18]			10.70%	[11],[12],[18]			10.23%	[14],[16]
Spread		5.50%	[11],[12],[18]			5.50%	[11],[12],[18]			5.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 8,593
Ending balance	[11],[12],[18]	$ 8,550				8,550
Fair value		8,550	[11],[12],[18]			8,550	[11],[12],[18]			$ 8,593	[14],[16]
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11]	336				336
Fair value	[11]	$ 336				$ 336
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	13.14%				13.14%
Spread	[11],[12],[18]	8%				8%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 264				$ 264
Fair value	[11],[12],[18]	$ 264				$ 264
Investment, Identifier [Axis]: Inspire Aesthetics Management, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	13.07%				13.07%
Spread	[11],[12],[18]	8%				8%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 10,023				$ 10,023
Fair value	[11],[12],[18]	10,023				10,023
Investment, Identifier [Axis]: Integral Energy Services, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						(460)
Amount of Interest, Fees or Dividends Credited to Income						21
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,280
Gross Additions						0
Gross Reductions						460
Ending balance	[11]	820				820
Fair value		$ 820	[11]			$ 820	[11]			1,280
Investment, Identifier [Axis]: Integral Energy Services, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[11],[12]	13.04%				13.04%
Spread	[11],[12]	7.50%				7.50%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(227)
Amount of Interest, Fees or Dividends Credited to Income						1,036
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						15,769
Gross Additions						33
Gross Reductions						227
Ending balance	[11],[12]	$ 15,575				15,575
Fair value		15,575	[11],[12]			15,575	[11],[12]			15,769
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					0
Ending balance	[11]	0				0
Fair value		$ 0	[11]			$ 0	[11]			$ 0	[14]
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		15.34%	[11],[18]			15.34%	[11],[18]			14.22%	[14],[54]
Spread		10%	[11],[18]			10%	[11],[18]			10%	[14],[54]
PIK Rate	[11],[18]	15.34%				15.34%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[54]					$ 1,682
Ending balance	[11],[18]	$ 1,781				1,781
Fair value		$ 1,781	[11],[18]			$ 1,781	[11],[18]			$ 1,682	[14],[54]
Investment, Identifier [Axis]: Interface Security Systems, L.L.C, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.23%	[11],[12],[18],[21]			12.23%	[11],[12],[18],[21]			12.07%	[14],[16],[22]
Spread		7%	[11],[12],[18],[21]			7%	[11],[12],[18],[21]			7%	[14],[16],[22]
PIK Rate		12.23%	[11],[12],[18],[21]			12.23%	[11],[12],[18],[21]			1%	[14],[16],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[22]					$ 1,082
Ending balance	[11],[12],[18],[21]	$ 823				823
Fair value		$ 823	[11],[12],[18],[21]			$ 823	[11],[12],[18],[21]			$ 1,082	[14],[16],[22]
Investment, Identifier [Axis]: Intermedia Holdings, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.19%	[8],[12],[18]			11.19%	[8],[12],[18]			10.38%	[7],[16]
Spread		6%	[8],[12],[18]			6%	[8],[12],[18]			6%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]					$ 15,811
Ending balance	[8],[12],[18]	$ 16,594				16,594
Fair value		$ 16,594	[8],[12],[18]			$ 16,594	[8],[12],[18]			$ 15,811	[7],[16]
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.04%	[11],[12]			12.04%	[11],[12]			10.14%	[14],[16]
Spread		6.50%	[11],[12]			6.50%	[11],[12]			6.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 622
Ending balance	[11],[12]	$ 605				605
Fair value		$ 605	[11],[12]			$ 605	[11],[12]			$ 622	[14],[16]
Investment, Identifier [Axis]: Invincible Boat Company, LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.04%	[11],[12]			12.04%	[11],[12]			10.17%	[14],[16]
Spread		6.50%	[11],[12]			6.50%	[11],[12]			6.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 16,889
Ending balance	[11],[12]	$ 16,429				16,429
Fair value		16,429	[11],[12]			16,429	[11],[12]			$ 16,889	[14],[16]
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,798		1,798
Gross Additions						958		0
Gross Reductions						0		0
Ending balance		2,756		1,798		2,756		1,798
Fair value		$ 2,756		$ 1,798		$ 2,756		$ 1,798		$ 1,798
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.50%		12.50%		13.50%		12.50%		12.50%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						307		204
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						4,500		3,170
Gross Additions						4		3
Gross Reductions						20		0
Ending balance		$ 4,484		$ 3,173		4,484		3,173
Fair value		$ 4,484		$ 3,173		$ 4,484		$ 3,173		$ 4,500
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.50%		12.50%		13.50%		12.50%		12.50%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						214		294
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,130		4,557
Gross Additions						3		4
Gross Reductions						14		0
Ending balance		$ 3,119		$ 4,561		3,119		4,561
Fair value		$ 3,119		$ 4,561		$ 3,119		$ 4,561		$ 3,130
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		13.50%		12.50%		13.50%		12.50%		12.50%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						600		1,839
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						8,944		28,749
Gross Additions						0		20
Gross Reductions						0		0
Ending balance		$ 8,944		$ 28,769		8,944		28,769
Fair value		$ 8,944		28,769		$ 8,944		28,769		$ 8,944
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		13.50%				13.50%				12.50%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						1,337
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						19,559
Gross Additions						17
Gross Reductions						88
Ending balance		$ 19,488				19,488
Fair value		$ 19,488				$ 19,488				$ 19,559
Investment, Identifier [Axis]: Iron-Main Investments, LLC, Secured Debt 5
Schedule of Investments [Line Items]
Total Rate		13.50%				13.50%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						890
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						10,857
Gross Reductions						38
Ending balance		$ 10,819				10,819
Fair value		10,819				10,819				$ 0
Investment, Identifier [Axis]: Isagenix International, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[8]	0				0
Fair value	[8]	$ 0				$ 0
Investment, Identifier [Axis]: Isagenix International, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.46%	[8],[12],[18]			12.46%	[8],[12],[18]			9.93%	[7],[16],[22]
Spread		5.50%	[8],[12],[18]			5.50%	[8],[12],[18]			7.75%	[7],[16],[22]
PIK Rate	[8],[12],[18]	3%				3%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16],[22]					$ 1,537
Ending balance	[8],[12],[18]	$ 2,074				2,074
Fair value		2,074	[8],[12],[18]			2,074	[8],[12],[18]			$ 1,537	[7],[16],[22]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					2,840
Ending balance	[11]	2,660				2,660
Fair value		$ 2,660	[11]			$ 2,660	[11]			$ 2,840	[14]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[11],[12],[13]			6%	[11],[12],[13]			6%	[14],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[17]					$ (135)
Ending balance	[11],[12],[13]	$ (118)				(118)
Fair value		$ (118)	[11],[12],[13]			$ (118)	[11],[12],[13]			$ (135)	[14],[16],[17]
Investment, Identifier [Axis]: JTI Electrical & Mechanical, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.54%	[11],[12]			11.54%	[11],[12]			10.73%	[14],[16]
Spread		6%	[11],[12]			6%	[11],[12]			6%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 36,947
Ending balance	[11],[12]	$ 36,474				36,474
Fair value		36,474	[11],[12]			36,474	[11],[12]			$ 36,947	[14],[16]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Preferred Equity
Schedule of Investments [Line Items]
Total Rate	[14],[19]									12%
PIK Rate	[14],[19]									12%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[19]					623
Ending balance	[11]	500				500
Fair value		$ 500	[11]			$ 500	[11]			$ 623	[14],[19]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.69%	[11],[12]			12.69%	[11],[12]			12.23%	[14],[16]
Spread		7.50%	[11],[12]			7.50%	[11],[12]			7.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 500
Ending balance	[11],[12]	$ 651				651
Fair value		$ 651	[11],[12]			$ 651	[11],[12]			$ 500	[14],[16]
Investment, Identifier [Axis]: Jackmont Hospitality, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.69%	[11],[12]			12.69%	[11],[12]			12.23%	[14],[16]
Spread		7.50%	[11],[12]			7.50%	[11],[12]			7.50%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 2,079
Ending balance	[11],[12]	$ 2,027				2,027
Fair value		2,027	[11],[12]			2,027	[11],[12]			$ 2,079	[14],[16]
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(1,460)		2,700
Amount of Interest, Fees or Dividends Credited to Income						626		1,376
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						14,970	[16]	12,420
Gross Additions						0		2,700
Gross Reductions						1,460		0
Ending balance		13,510	[20]	15,120		13,510	[20]	15,120
Fair value		$ 13,510	[20]	$ 15,120		$ 13,510	[20]	$ 15,120		$ 14,970	[16]
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				10%				10%
Spread				6.75%				6.75%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(4)
Amount of Interest, Fees or Dividends Credited to Income								130
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								2,550
Gross Additions								4
Gross Reductions								104
Ending balance				$ 2,450				2,450
Fair value				2,450				2,450
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.75%	[13]			6.75%	[13]			6.75%	[17]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[17]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[13]	$ 0				0
Fair value		$ 0	[13]			$ 0	[13]			$ 0	[17]
Investment, Identifier [Axis]: Jensen Jewelers of Idaho, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		15%	[12]			15%	[12]			13.75%	[16]
Spread		6.75%	[12]			6.75%	[12]			6.75%	[16]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(3)
Amount of Interest, Fees or Dividends Credited to Income						183
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16]					2,450
Gross Additions						3
Gross Reductions						3
Ending balance	[12]	$ 2,450				2,450
Fair value		2,450	[12]			2,450	[12]			$ 2,450	[16]
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]					0
Ending balance	[8]	0				0
Fair value		$ 0	[8]			$ 0	[8]			$ 0	[7]
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		23.35%	[8],[18],[21]			23.35%	[8],[18],[21]			18%	[7]
Spread	[8],[18],[21]	18%				18%
PIK Rate	[8],[18],[21]	23.35%				23.35%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]					$ 2,297
Ending balance	[8],[18],[21]	$ 2,151				2,151
Fair value		$ 2,151	[8],[18],[21]			$ 2,151	[8],[18],[21]			$ 2,297	[7]
Investment, Identifier [Axis]: Joerns Healthcare, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		21.48%	[8],[18],[21]			21.48%	[8],[18],[21]			19.75%	[7],[22]
Spread	[8],[18],[21]	16%				16%
PIK Rate		21.48%	[8],[18],[21]			21.48%	[8],[18],[21]			19.75%	[7],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[22]					$ 504
Ending balance	[8],[18],[21]	$ 280				280
Fair value		280	[8],[18],[21]			280	[8],[18],[21]			$ 504	[7],[22]
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						1,010		2,730
Amount of Interest, Fees or Dividends Credited to Income						91		566
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						5,540	[19]	3,150
Gross Additions						1,010		2,730
Gross Reductions						0		0
Ending balance		6,550	[20]	5,880		6,550	[20]	5,880
Fair value		$ 6,550	[20]	$ 5,880		$ 6,550	[20]	$ 5,880		$ 5,540	[19]
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				13%				13%
Spread				11.50%				11.50%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								92
Amount of Interest, Fees or Dividends Credited to Income								755
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								11,344
Gross Additions								115
Gross Reductions								1,038
Ending balance				$ 10,421				10,421
Fair value				10,421				10,421
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		11.50%	[12],[13]			11.50%	[12],[13]			11.50%	[16],[17]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(2)
Amount of Interest, Fees or Dividends Credited to Income						6
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[17]					0
Gross Additions						2
Gross Reductions						2
Ending balance	[12],[13]	$ 0				0
Fair value		$ 0	[12],[13]			$ 0	[12],[13]			$ 0	[16],[17]
Investment, Identifier [Axis]: Johnson Downie Opco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		16.75%	[12]			16.75%	[12]			15.63%	[16]
Spread		11.50%	[12]			11.50%	[12]			11.50%	[16]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(11)
Amount of Interest, Fees or Dividends Credited to Income						827
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16]					9,999
Gross Additions						11
Gross Reductions						172
Ending balance	[12]	$ 9,838				9,838
Fair value		9,838	[12]			9,838	[12]			$ 9,999	[16]
Investment, Identifier [Axis]: JorVet Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								54
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								0
Gross Additions								10,741
Gross Reductions								0
Ending balance				10,741				10,741
Fair value				$ 10,741				$ 10,741
Investment, Identifier [Axis]: JorVet Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						512
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19]					10,741
Gross Additions						0
Gross Reductions						0
Ending balance	[20]	10,741				10,741
Fair value		$ 10,741	[20]			$ 10,741	[20]			$ 10,741	[19]
Investment, Identifier [Axis]: JorVet Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%		12%		12%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						1,573		1,082
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						25,432		0
Gross Additions						26		25,406
Gross Reductions						0		0
Ending balance		$ 25,458		$ 25,406		25,458		25,406
Fair value		25,458		25,406		25,458		25,406		$ 25,432
Investment, Identifier [Axis]: KBK Industries, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(3,210)		310
Amount of Interest, Fees or Dividends Credited to Income						6,496		685
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						15,570	[19]	13,620
Gross Additions						0		310
Gross Reductions						3,210		0
Ending balance		12,360	[20]	13,930		12,360	[20]	13,930
Fair value		$ 12,360	[20]	13,930		$ 12,360	[20]	13,930		15,570	[19]
Investment, Identifier [Axis]: KBK Industries, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		9%				9%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						49
Amount of Interest, Fees or Dividends Credited to Income						320
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						6,000
Gross Reductions						700
Ending balance		$ 5,300				5,300
Fair value		$ 5,300				$ 5,300				$ 0
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.81%	[11],[12]			12.81%	[11],[12]			12%	[14],[16]
Spread		7.25%	[11],[12]			7.25%	[11],[12]			7.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 995
Ending balance	[11],[12]	$ 954				954
Fair value		$ 954	[11],[12]			$ 954	[11],[12]			$ 995	[14],[16]
Investment, Identifier [Axis]: KMS, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.81%	[11],[12]			12.81%	[11],[12]			12%	[14],[16]
Spread		7.25%	[11],[12]			7.25%	[11],[12]			7.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 7,022
Ending balance	[11],[12]	$ 6,835				6,835
Fair value		6,835	[11],[12]			6,835	[11],[12]			$ 7,022	[14],[16]
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						(70)
Amount of Interest, Fees or Dividends Credited to Income						60
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19],[29]					2,850
Gross Additions						0
Gross Reductions						70
Ending balance	[20],[30]	2,780				2,780
Fair value		2,780	[20],[30]			2,780	[20],[30]			2,850	[19],[29]
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								(70)
Amount of Interest, Fees or Dividends Credited to Income								0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								12,310
Gross Additions								0
Gross Reductions								70
Ending balance				12,240				12,240
Fair value				12,240				12,240
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								55
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								2,460
Gross Additions								0
Gross Reductions								0
Ending balance				2,460				2,460
Fair value				$ 2,460				$ 2,460
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						510
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						7,220
Gross Additions						510
Gross Reductions						0
Ending balance		7,730				7,730
Fair value		$ 7,730				$ 7,730				$ 7,220
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%		11.50%		12%		11.50%		11.50%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						1,407		1,205
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						20,374		20,324
Gross Additions						195		25
Gross Reductions						0		0
Ending balance		$ 20,569		$ 20,349		20,569		20,349
Fair value		$ 20,569		$ 20,349		$ 20,569		$ 20,349		$ 20,374
Investment, Identifier [Axis]: Kickhaefer Manufacturing Company, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		9%		9%		9%		9%		9%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						175		177
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,842		3,876
Gross Additions						1		1
Gross Reductions						19		17
Ending balance		$ 3,824		$ 3,860		3,824		3,860
Fair value		$ 3,824		3,860		$ 3,824		3,860		$ 3,842
Investment, Identifier [Axis]: Kore Wireless Group Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.84%	[8],[18]			10.84%	[8],[18]			10.08%	[7],[15]
Spread		5.50%	[8],[18]			5.50%	[8],[18]			5.50%	[7],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[15]					$ 10,930
Ending balance	[8],[18]	$ 10,657				10,657
Fair value		10,657	[8],[18]			10,657	[8],[18]			$ 10,930	[7],[15]
Investment, Identifier [Axis]: L.F. Manufacturing Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								590
Amount of Interest, Fees or Dividends Credited to Income								224
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								2,560
Gross Additions								590
Gross Reductions								0
Ending balance				3,150				3,150
Fair value				3,150				3,150
Investment, Identifier [Axis]: L.F. Manufacturing Holdings, LLC, Preferred Member Units (non-voting)
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								8
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								107
Gross Additions								8
Gross Reductions								0
Ending balance				115				115
Fair value				$ 115				$ 115
Investment, Identifier [Axis]: LKCM Headwater Investments I, L.P., LP Interests
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19],[35],[36],[37]					3,197
Ending balance	[20],[33],[38],[39]	3,354				3,354
Fair value		$ 3,354	[20],[33],[38],[39]			$ 3,354	[20],[33],[38],[39]			$ 3,197	[19],[35],[36],[37]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.43%	[11],[12],[18]			12.43%	[11],[12],[18]			11.21%	[14],[15],[16]
Spread		7.25%	[11],[12],[18]			7.25%	[11],[12],[18]			7.25%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 8,047
Ending balance	[11],[12],[18]	$ 8,004				8,004
Fair value		$ 8,004	[11],[12],[18]			$ 8,004	[11],[12],[18]			$ 8,047	[14],[15],[16]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.45%	[11],[12],[18],[55]			12.45%	[11],[12],[18],[55]			11.67%	[14],[15],[16]
Spread		7.25%	[11],[12],[18],[55]			7.25%	[11],[12],[18],[55]			7.25%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 9,130
Ending balance	[11],[12],[18],[55]	$ 9,154				9,154
Fair value		$ 9,154	[11],[12],[18],[55]			$ 9,154	[11],[12],[18],[55]			$ 9,130	[14],[15],[16]
Investment, Identifier [Axis]: LL Management, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.44%	[11],[12],[18]			12.44%	[11],[12],[18]			11.67%	[14],[15],[16]
Spread		7.25%	[11],[12],[18]			7.25%	[11],[12],[18]			7.25%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 10,749
Ending balance	[11],[12],[18]	$ 10,778				10,778
Fair value		$ 10,778	[11],[12],[18]			$ 10,778	[11],[12],[18]			$ 10,749	[14],[15],[16]
Investment, Identifier [Axis]: LLFlex, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		15.22%	[11],[12],[18]			15.22%	[11],[12],[18]			12.74%	[14],[16]
Spread		9%	[11],[12],[18]			9%	[11],[12],[18]			9%	[14],[16]
PIK Rate	[11],[12],[18]	1%				1%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 4,350
Ending balance	[11],[12],[18]	$ 4,037				4,037
Fair value		$ 4,037	[11],[12],[18]			$ 4,037	[11],[12],[18]			$ 4,350	[14],[16]
Investment, Identifier [Axis]: Lightbox Holdings, L.P., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.50%	[8],[18]			10.50%	[8],[18]			9.73%	[7]
Spread		5%	[8],[18]			5%	[8],[18]			5%	[7]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]					$ 13,968
Ending balance	[8],[18]	$ 14,040				14,040
Fair value		$ 14,040	[8],[18]			$ 14,040	[8],[18]			$ 13,968	[7]
Investment, Identifier [Axis]: Logix Acquisition Company, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.48%	[11],[12]			11.48%	[11],[12]			10.13%	[14],[16]
Spread		5.75%	[11],[12]			5.75%	[11],[12]			5.75%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 16,221
Ending balance	[11],[12]	$ 19,137				19,137
Fair value		19,137	[11],[12]			19,137	[11],[12]			$ 16,221	[14],[16]
Investment, Identifier [Axis]: Looking Glass Investments, LLC, Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[35],[36]					25
Ending balance	[33],[38]	25				25
Fair value		$ 25	[33],[38]			$ 25	[33],[38]			$ 25	[35],[36]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.20%	[8],[12],[18],[56]			11.20%	[8],[12],[18],[56]			10.42%	[7],[15],[16]
Spread		6%	[8],[12],[18],[56]			6%	[8],[12],[18],[56]			6%	[7],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[15],[16]					$ 8,338
Ending balance	[8],[12],[18],[56]	$ 10,244				10,244
Fair value		$ 10,244	[8],[12],[18],[56]			$ 10,244	[8],[12],[18],[56]			$ 8,338	[7],[15],[16]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.20%	[8],[12],[18]			11.20%	[8],[12],[18]			10.42%	[7],[15],[16]
Spread		6%	[8],[12],[18]			6%	[8],[12],[18]			6%	[7],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[15],[16]					$ 7,876
Ending balance	[8],[12],[18]	$ 7,836				7,836
Fair value		7,836	[8],[12],[18]			7,836	[8],[12],[18]			$ 7,876	[7],[15],[16]
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		0				0
Fair value		0				0				0
Investment, Identifier [Axis]: MH Corbin Holding LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		0				0
Fair value		$ 0				$ 0				$ 0
Investment, Identifier [Axis]: MH Corbin Holding LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13%	[26]	13%		13%	[26]	13%		13%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						1,150		(1,495)
Amount of Interest, Fees or Dividends Credited to Income						392		540
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						4,548		5,934
Gross Additions						1,150		9
Gross Reductions						195		1,655
Ending balance		$ 5,503	[26]	$ 4,288		5,503	[26]	4,288
Fair value		5,503	[26]	4,288		5,503	[26]	4,288		$ 4,548
Investment, Identifier [Axis]: MS Private Loan Fund I, LP, LP Interests
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19],[35],[36],[37]					14,833
Ending balance	[20],[33],[38],[39]	14,635				14,635
Fair value		14,635	[20],[33],[38],[39]			14,635	[20],[33],[38],[39]			14,833	[19],[35],[36],[37]
Investment, Identifier [Axis]: MS Private Loan Fund I, LP, Secured Debt
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[17],[35],[36]					0
Ending balance	[13],[33],[38]	0				0
Fair value		0	[13],[33],[38]			0	[13],[33],[38]			0	[17],[35],[36]
Investment, Identifier [Axis]: MS Private Loan Fund, LP Interests
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(198)		(544)
Amount of Interest, Fees or Dividends Credited to Income						776		191
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						14,833		2,581
Gross Additions						0		8,750
Gross Reductions						198		544
Ending balance		14,635		10,787		14,635		10,787
Fair value		14,635		10,787		14,635		10,787		14,833
Investment, Identifier [Axis]: MS Private Loan Fund, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						13
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		0				0
Fair value		0				0				0
Investment, Identifier [Axis]: MS Private Loan Fund, Secured Debt 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		0				0
Fair value		0				0				0
Investment, Identifier [Axis]: MSC Adviser I, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						11,040		(22,080)
Amount of Interest, Fees or Dividends Credited to Income						5,916		3,983
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						122,930	[19],[57]	140,400
Gross Additions						11,040		0
Gross Reductions						0		22,080
Ending balance		133,970	[20],[58]	118,320		133,970	[20],[58]	118,320
Fair value		133,970	[20],[58]	118,320		133,970	[20],[58]	118,320		122,930	[19],[57]
Investment, Identifier [Axis]: MSC Income Fund, Inc., Common Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(65)		0
Amount of Interest, Fees or Dividends Credited to Income						32		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						753	[19],[35],[36]	0
Gross Additions						2,000		750
Gross Reductions						65		0
Ending balance		2,688	[20],[33],[38]	750		2,688	[20],[33],[38]	750
Fair value		$ 2,688	[20],[33],[38]	$ 750		$ 2,688	[20],[33],[38]	$ 750		$ 753	[19],[35],[36]
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.91%	[11],[12]			12.91%	[11],[12]			11.79%	[14],[16],[59]
Spread		7.25%	[11],[12]			7.25%	[11],[12]			7.25%	[14],[16],[59]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[59]					$ 3,083
Ending balance	[11],[12]	$ 2,373				2,373
Fair value		$ 2,373	[11],[12]			$ 2,373	[11],[12]			$ 3,083	[14],[16],[59]
Investment, Identifier [Axis]: Mako Steel, LP, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.91%	[11],[12]			12.91%	[11],[12]			11.09%	[14],[16]
Spread		7.25%	[11],[12]			7.25%	[11],[12]			7.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 15,224
Ending balance	[11],[12]	$ 15,147				15,147
Fair value		15,147	[11],[12]			15,147	[11],[12]			$ 15,224	[14],[16]
Investment, Identifier [Axis]: Market Force Information, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						(16,642)
Amount of Unrealized Gain/(Loss)						16,642
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						16,642
Gross Reductions						16,642
Ending balance		0				0
Fair value		$ 0				$ 0				$ 0
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				12.13%				12.13%		15.13%	[16]
Spread		11%		11%		11%		11%		11%	[16]
Amount of Realized Gain/(Loss)						$ (6,662)		$ 0
Amount of Unrealized Gain/(Loss)						163		0
Amount of Interest, Fees or Dividends Credited to Income						453		217
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						6,090	[16]	3,400
Gross Additions						804		1,000
Gross Reductions						6,894		0
Ending balance		$ 0		$ 4,400		0		4,400
Fair value		0		$ 4,400		0		$ 4,400		$ 6,090	[16]
Investment, Identifier [Axis]: Market Force Information, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate				12%				12%		12%	[22]
PIK Rate				12%				12%		12%	[22]
Amount of Realized Gain/(Loss)						(25,952)		$ 0
Amount of Unrealized Gain/(Loss)						24,342		(1,405)
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,610	[22]	8,936
Gross Additions						24,342		0
Gross Reductions						25,952		1,405
Ending balance		0		$ 7,531		0		7,531
Fair value		0		7,531		0		7,531		$ 1,610	[22]
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						(137)
Amount of Interest, Fees or Dividends Credited to Income						619
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,537
Gross Additions						0
Gross Reductions						137
Ending balance	[20]	1,400				1,400
Fair value		$ 1,400	[20]			$ 1,400	[20]			$ 1,537
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Preferred Equity
Schedule of Investments [Line Items]
Total Rate		8%	[20]			8%	[20]			8%	[19]
PIK Rate		8%	[20]			8%	[20]			8%	[19]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						118
Amount of Interest, Fees or Dividends Credited to Income						148
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19]					6,010
Gross Additions						235
Gross Reductions						0
Ending balance	[20]	$ 6,245				6,245
Fair value		6,245	[20]			6,245	[20]			$ 6,010	[19]
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						5
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[17]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[13]	0				0
Fair value		$ 0	[13]			$ 0	[13]			$ 0	[17]
Investment, Identifier [Axis]: MetalForming AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.75%				12.75%				12.75%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						1,518
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						23,576
Gross Additions						23
Gross Reductions						0
Ending balance		$ 23,599				23,599
Fair value		$ 23,599				$ 23,599				$ 23,576
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.25%	[11],[12],[13],[18]			6.25%	[11],[12],[13],[18]			6.25%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (63)
Ending balance	[11],[12],[13],[18]	$ (57)				(57)
Fair value		$ (57)	[11],[12],[13],[18]			$ (57)	[11],[12],[13],[18]			$ (63)	[14],[15],[16],[17]
Investment, Identifier [Axis]: Microbe Formulas, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.44%	[11],[12],[18]			11.44%	[11],[12],[18]			9.86%	[14],[15],[16]
Spread		6.25%	[11],[12],[18]			6.25%	[11],[12],[18]			6.25%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 25,181
Ending balance	[11],[12],[18]	$ 23,945				23,945
Fair value		$ 23,945	[11],[12],[18]			$ 23,945	[11],[12],[18]			$ 25,181	[14],[15],[16]
Investment, Identifier [Axis]: Mills Fleet Farm Group, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.77%	[11],[12],[18]			11.77%	[11],[12],[18]			10.66%	[14],[16]
Spread		6.50%	[11],[12],[18]			6.50%	[11],[12],[18]			6.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 18,338
Ending balance	[11],[12],[18]	$ 17,884				17,884
Fair value		17,884	[11],[12],[18]			17,884	[11],[12],[18]			$ 18,338	[14],[16]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[36],[50]					889
Ending balance	[11],[33],[34]	889				889
Fair value		$ 889	[11],[33],[34]			$ 889	[11],[33],[34]			$ 889	[14],[36],[50]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[12],[33],[34]	12.54%				12.54%
Spread		7%	[11],[12],[33],[34]			7%	[11],[12],[33],[34]			7%	[14],[16],[17],[36],[50]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[17],[36],[50]					$ (64)
Ending balance	[11],[12],[33],[34]	$ 3,648				3,648
Fair value		$ 3,648	[11],[12],[33],[34]			$ 3,648	[11],[12],[33],[34]			$ (64)	[14],[16],[17],[36],[50]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.54%	[11],[12],[33],[34]			12.54%	[11],[12],[33],[34]			11.73%	[14],[16],[36],[50]
Spread		7%	[11],[12],[33],[34]			7%	[11],[12],[33],[34]			7%	[14],[16],[36],[50]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[36],[50]					$ 10,714
Ending balance	[11],[12],[33],[34]	$ 10,899				10,899
Fair value		$ 10,899	[11],[12],[33],[34]			$ 10,899	[11],[12],[33],[34]			$ 10,714	[14],[16],[36],[50]
Investment, Identifier [Axis]: MonitorUS Holding, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.54%	[11],[12],[18],[33],[34]			12.54%	[11],[12],[18],[33],[34]			11.73%	[14],[16],[36],[50]
Spread		7%	[11],[12],[18],[33],[34]			7%	[11],[12],[18],[33],[34]			7%	[14],[16],[36],[50]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[36],[50]					$ 17,038
Ending balance	[11],[12],[18],[33],[34]	$ 17,038				17,038
Fair value		17,038	[11],[12],[18],[33],[34]			17,038	[11],[12],[18],[33],[34]			$ 17,038	[14],[16],[36],[50]
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						4,320		7,370
Amount of Interest, Fees or Dividends Credited to Income						1,977		1,596
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						22,830	[19]	8,840
Gross Additions						4,320		7,370
Gross Reductions						0		0
Ending balance		27,150	[20]	16,210		27,150	[20]	16,210
Fair value		27,150	[20]	$ 16,210		27,150	[20]	$ 16,210		22,830	[19]
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				10%				10%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(1)
Amount of Interest, Fees or Dividends Credited to Income								312
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								6,378
Gross Additions								1
Gross Reductions								281
Ending balance				$ 6,098				6,098
Fair value				6,098				6,098
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[17]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[13]	0				0
Fair value		$ 0	[13]			$ 0	[13]			$ 0	[17]
Investment, Identifier [Axis]: Mystic Logistics Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%				10%				10%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						289
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						5,746
Gross Additions						0
Gross Reductions						0
Ending balance		$ 5,746				5,746
Fair value		5,746				5,746				$ 5,746
Investment, Identifier [Axis]: NAPCO Precast, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						880		(1,730)
Amount of Interest, Fees or Dividends Credited to Income						0		4
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						11,830		13,560
Gross Additions						880		0
Gross Reductions						0		1,730
Ending balance		12,710		11,830		12,710		11,830
Fair value		$ 12,710		11,830		$ 12,710		11,830		$ 11,830
Investment, Identifier [Axis]: NBG Acquisition Inc, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.71%	[8],[12],[21]			10.71%	[8],[12],[21]			9.67%	[7],[16]
Spread		5.50%	[8],[12],[21]			5.50%	[8],[12],[21]			5.50%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]					$ 1,251
Ending balance	[8],[12],[21]	$ 154				154
Fair value		154	[8],[12],[21]			154	[8],[12],[21]			$ 1,251	[7],[16]
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								(970)
Amount of Interest, Fees or Dividends Credited to Income								198
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						4,790	[19]	6,440
Gross Additions								0
Gross Reductions								970
Ending balance				5,470				5,470
Fair value				$ 5,470				$ 5,470		4,790	[19]
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[20]	145				145
Fair value	[20]	145				145
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 1.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						(750)
Amount of Interest, Fees or Dividends Credited to Income						36
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						4,615
Gross Additions						0
Gross Reductions						750
Ending balance		3,865				3,865
Fair value		3,865				3,865				4,615
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 2
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[20]	3,865				3,865
Fair value	[20]	3,865				3,865
Investment, Identifier [Axis]: NRP Jones, LLC, Member Units 2.1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						(31)
Amount of Interest, Fees or Dividends Credited to Income						(2)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						175
Gross Additions						0
Gross Reductions						30
Ending balance		145				145
Fair value		$ 145				$ 145				$ 175
Investment, Identifier [Axis]: NRP Jones, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%		12%		12%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						126		126
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,080		2,080
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		$ 2,080		$ 2,080		2,080		2,080
Fair value		$ 2,080		2,080		$ 2,080		2,080		$ 2,080
Investment, Identifier [Axis]: NTM Acquisition Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate		13.64%	[8],[12],[18]			13.64%	[8],[12],[18]			9.50%	[7],[16]
Spread		7.25%	[8],[12],[18]			7.25%	[8],[12],[18]			6.25%	[7],[16]
PIK Rate		1%	[8],[12],[18]			1%	[8],[12],[18]			1%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]					$ 4,228
Ending balance	[8],[12],[18]	$ 4,068				4,068
Fair value		$ 4,068	[8],[12],[18]			$ 4,068	[8],[12],[18]			$ 4,228	[7],[16]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.13%	[11],[12],[18],[60]			13.13%	[11],[12],[18],[60]			10.85%	[14],[15],[16],[61]
Spread		8%	[11],[12],[18],[60]			8%	[11],[12],[18],[60]			8%	[14],[15],[16],[61]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[61]					$ 3,720
Ending balance	[11],[12],[18],[60]	$ 2,811				2,811
Fair value		$ 2,811	[11],[12],[18],[60]			$ 2,811	[11],[12],[18],[60]			$ 3,720	[14],[15],[16],[61]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.19%	[11],[12],[18]			13.19%	[11],[12],[18]			12.56%	[14],[15],[16]
Spread		8%	[11],[12],[18]			8%	[11],[12],[18]			8%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 37,616
Ending balance	[11],[12],[18]	$ 37,923				37,923
Fair value		$ 37,923	[11],[12],[18]			$ 37,923	[11],[12],[18]			$ 37,616	[14],[15],[16]
Investment, Identifier [Axis]: NWN Corporation, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		20%	[11]			20%	[11]			20%	[14]
PIK Rate		20%	[11]			20%	[11]			20%	[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					$ 6,194
Ending balance	[11]	$ 6,934				6,934
Fair value		6,934	[11]			6,934	[11]			$ 6,194	[14]
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						5,090		0
Amount of Interest, Fees or Dividends Credited to Income						302		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						7,700		7,700
Gross Additions						5,090		0
Gross Reductions						0		0
Ending balance		12,790	[20]	7,700		12,790	[20]	7,700
Fair value		$ 12,790	[20]	$ 7,700		$ 12,790	[20]	$ 7,700		$ 7,700
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%		12%
Spread	[16],[17]									7%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								649
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						$ 0	[16],[17]	10,412
Gross Additions								11
Gross Reductions								0
Ending balance		$ 21,294		$ 10,423		21,294		10,423
Fair value		$ 21,294		$ 10,423		$ 21,294		$ 10,423		$ 0	[16],[17]
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 1.1
Schedule of Investments [Line Items]
Spread		7%				7%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						5
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		$ 0				0
Fair value		$ 0				$ 0				$ 0
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%		12%		12%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								548
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						$ 20,094		4,829
Gross Additions								6,544
Gross Reductions								0
Ending balance		$ 10,500		$ 11,373		10,500		11,373
Fair value		$ 10,500		11,373		$ 10,500		11,373		$ 20,094
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Total Rate		12%				12%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						6
Amount of Interest, Fees or Dividends Credited to Income						1,258
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						20,094
Gross Additions						1,200
Gross Reductions						0
Ending balance		$ 21,294				21,294
Fair value		$ 21,294				$ 21,294				$ 20,094
Investment, Identifier [Axis]: Nebraska Vet AcquireCo, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12%				12%				12%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(11)
Amount of Interest, Fees or Dividends Credited to Income						644
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						10,500
Gross Additions						11
Gross Reductions						11
Ending balance		$ 10,500				10,500
Fair value		10,500				10,500				$ 10,500
Investment, Identifier [Axis]: NexRev LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						2,340		(3,080)
Amount of Interest, Fees or Dividends Credited to Income						151		40
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,110	[19]	2,690
Gross Additions						2,340		0
Gross Reductions						0		1,750
Ending balance		3,450	[20]	940		3,450	[20]	940
Fair value		3,450	[20]	$ 940		3,450	[20]	$ 940		1,110	[19]
Investment, Identifier [Axis]: NexRev LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				11%				11%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(1,703)
Amount of Interest, Fees or Dividends Credited to Income								1,222
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								14,045
Gross Additions								0
Gross Reductions								5,783
Ending balance				$ 8,262				8,262
Fair value				8,262				8,262
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[17]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[13]	0				0
Fair value		$ 0	[13]			$ 0	[13]			$ 0	[17]
Investment, Identifier [Axis]: NexRev LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10%				10%				11%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						1,500
Amount of Interest, Fees or Dividends Credited to Income						616
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						8,477
Gross Additions						1,545
Gross Reductions						1,654
Ending balance		$ 8,368				8,368
Fair value		$ 8,368				$ 8,368				$ 8,477
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.25%	[11],[12],[13],[18]			6.25%	[11],[12],[13],[18]			6.25%	[14],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[17]					$ 0
Ending balance	[11],[12],[13],[18]	$ 0				0
Fair value		$ 0	[11],[12],[13],[18]			$ 0	[11],[12],[13],[18]			$ 0	[14],[16],[17]
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Spread		6.25%	[11],[12],[13],[18]			6.25%	[11],[12],[13],[18]			6.25%	[14],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[17]					$ (38)
Ending balance	[11],[12],[13],[18]	$ (29)				(29)
Fair value		$ (29)	[11],[12],[13],[18]			$ (29)	[11],[12],[13],[18]			$ (38)	[14],[16],[17]
Investment, Identifier [Axis]: NinjaTrader, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.26%	[11],[12],[18]			11.26%	[11],[12],[18]			9.99%	[14],[16]
Spread		6%	[11],[12],[18]			6%	[11],[12],[18]			6.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 21,666
Ending balance	[11],[12],[18]	$ 20,467				20,467
Fair value		20,467	[11],[12],[18]			20,467	[11],[12],[18]			$ 21,666	[14],[16]
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								(1,940)
Amount of Interest, Fees or Dividends Credited to Income								0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								13,500
Gross Additions								0
Gross Reductions								1,940
Ending balance				11,560				11,560
Fair value				$ 11,560				$ 11,560
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						340
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						8,040
Gross Additions						340
Gross Reductions						0
Ending balance		8,380				8,380
Fair value		8,380				8,380				8,040
Investment, Identifier [Axis]: NuStep, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						5,150
Gross Additions						0
Gross Reductions						0
Ending balance		5,150				5,150
Fair value		$ 5,150				$ 5,150				$ 5,150
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.75%	[12]	7.63%		11.75%	[12]	7.63%		10.63%	[16]
Spread		6.50%	[12]	6.50%		6.50%	[12]	6.50%		6.50%	[16]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						251		110
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						4,399	[16]	1,720
Gross Additions						0		1,480
Gross Reductions						0		0
Ending balance		$ 4,399	[12]	$ 3,200		4,399	[12]	3,200
Fair value		$ 4,399	[12]	$ 3,200		$ 4,399	[12]	$ 3,200		$ 4,399	[16]
Investment, Identifier [Axis]: NuStep, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%		12%		12%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		28
Amount of Interest, Fees or Dividends Credited to Income						1,119		1,043
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						18,414		17,240
Gross Additions						6		1,200
Gross Reductions						0		0
Ending balance		$ 18,420		$ 18,440		18,420		18,440
Fair value		18,420		18,440		18,420		18,440		$ 18,414
Investment, Identifier [Axis]: OMi Topco, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						6,500		90
Amount of Interest, Fees or Dividends Credited to Income						1,350		1,197
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						22,810	[19]	20,210
Gross Additions						6,500		90
Gross Reductions						0		0
Ending balance		29,310	[20]	20,300		29,310	[20]	20,300
Fair value		$ 29,310	[20]	$ 20,300		$ 29,310	[20]	$ 20,300		$ 22,810	[19]
Investment, Identifier [Axis]: OMi Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%		12%		12%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(25)		(29)
Amount of Interest, Fees or Dividends Credited to Income						952		1,099
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						15,750		18,000
Gross Additions						25		29
Gross Reductions						1,525		1,279
Ending balance		$ 14,250		$ 16,750		14,250		16,750
Fair value		$ 14,250		$ 16,750		14,250		$ 16,750		$ 15,750
Investment, Identifier [Axis]: OVG Business Services, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[14],[16]									10.64%
Spread	[14],[16]									6.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 13,094
Fair value	[14],[16]									$ 13,094
Investment, Identifier [Axis]: Obra Capital, Inc, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[8],[18]	11.22%				11.22%
Spread	[8],[18]	6%				6%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[8],[18]	$ 13,763				$ 13,763
Fair value	[8],[18]	13,763				13,763
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		0				0
Fair value		$ 0				$ 0				$ 0
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Preferred Stock
Schedule of Investments [Line Items]
Total Rate		7%				7%				7%
PIK Rate		7%				7%				7%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		$ 0				0
Fair value		$ 0				$ 0				$ 0
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%	[21]	12%		12%	[21]	12%		12%	[22]
PIK Rate		12%	[21]	12%		12%	[21]	12%		12%	[22]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(127)		(155)
Amount of Interest, Fees or Dividends Credited to Income						0		28
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						569	[22]	935
Gross Additions						0		28
Gross Reductions						128		155
Ending balance		$ 441	[21]	$ 808		441	[21]	808
Fair value		$ 441	[21]	$ 808		$ 441	[21]	$ 808		$ 569	[22]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%	[21]	12%		12%	[21]	12%		12%	[22]
PIK Rate		12%	[21]	12%		12%	[21]	12%		12%	[22]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(130)		(158)
Amount of Interest, Fees or Dividends Credited to Income						0		29
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						580	[22]	954
Gross Additions						0		29
Gross Reductions						130		158
Ending balance		$ 450	[21]	$ 825		450	[21]	825
Fair value		$ 450	[21]	$ 825		$ 450	[21]	$ 825		$ 580	[22]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12%	[21]	12%		12%	[21]	12%		12%	[22]
PIK Rate		12%	[21]	12%		12%	[21]	12%		12%	[22]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(280)		(341)
Amount of Interest, Fees or Dividends Credited to Income						0		62
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,249	[22]	2,055
Gross Additions						0		62
Gross Reductions						280		341
Ending balance		$ 969	[21]	$ 1,776		969	[21]	1,776
Fair value		$ 969	[21]	$ 1,776		$ 969	[21]	$ 1,776		$ 1,249	[22]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Secured Debt 4
Schedule of Investments [Line Items]
Total Rate		12%	[21]	12%		12%	[21]	12%		12%	[22]
PIK Rate		12%	[21]	12%		12%	[21]	12%		12%	[22]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(584)		(710)
Amount of Interest, Fees or Dividends Credited to Income						0		129
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,606	[22]	4,286
Gross Additions						0		129
Gross Reductions						584		711
Ending balance		$ 2,022	[21]	$ 3,704		2,022	[21]	3,704
Fair value		$ 2,022	[21]	$ 3,704		$ 2,022	[21]	$ 3,704		$ 2,606	[22]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Unsecured Debt
Schedule of Investments [Line Items]
Total Rate		10%	[21]	10%		10%	[21]	10%		10%	[22]
PIK Rate		10%	[21]	10%		10%	[21]	10%		10%	[22]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						0		5
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						305	[22]	191
Gross Additions						0		11
Gross Reductions						0		5
Ending balance		$ 305	[21]	$ 197		305	[21]	197
Fair value		305	[21]	197		305	[21]	197		$ 305	[22]
Investment, Identifier [Axis]: OnAsset Intelligence, Inc., Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[9]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[10]	0				0
Fair value		0	[10]			0	[10]			0	[9]
Investment, Identifier [Axis]: Oneliance, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,056		1,056
Gross Additions						72		0
Gross Reductions						0		0
Ending balance		1,128		1,056		1,128		1,056
Fair value		$ 1,128		$ 1,056		$ 1,128		$ 1,056		$ 1,056
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12.06%				12.06%
Spread				11%				11%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								344
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								5,547
Gross Additions								6
Gross Reductions								0
Ending balance				$ 5,553				5,553
Fair value				5,553				5,553
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		11%	[12],[13]			11%	[12],[13]			11%	[16],[17]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[17]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[12],[13]	$ 0				0
Fair value		$ 0	[12],[13]			$ 0	[12],[13]			$ 0	[16],[17]
Investment, Identifier [Axis]: Oneliance, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		16.25%	[12]			16.25%	[12]			15.13%	[16]
Spread		11%	[12]			11%	[12]			11%	[16]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(61)
Amount of Interest, Fees or Dividends Credited to Income						447
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16]					5,559
Gross Additions						6
Gross Reductions						141
Ending balance	[12]	$ 5,424				5,424
Fair value		5,424	[12]			5,424	[12]			$ 5,559	[16]
Investment, Identifier [Axis]: Orttech Holdings, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						4,810		0
Amount of Interest, Fees or Dividends Credited to Income						537		386
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						11,750	[19],[29]	10,000
Gross Additions						4,810		0
Gross Reductions						0		0
Ending balance		16,560	[20],[30]	10,000		16,560	[20],[30]	10,000
Fair value		$ 16,560	[20],[30]	$ 10,000		$ 16,560	[20],[30]	$ 10,000		$ 11,750	[19],[29]
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%				12%
Spread				11%				11%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								1,494
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								24,150
Gross Additions								29
Gross Reductions								400
Ending balance				$ 23,779				23,779
Fair value				23,779				23,779
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		11%	[12],[13]			11%	[12],[13]			11%	[16],[17]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[17]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[12],[13]	$ 0				0
Fair value		$ 0	[12],[13]			$ 0	[12],[13]			$ 0	[16],[17]
Investment, Identifier [Axis]: Orttech Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		16.25%	[12]			16.25%	[12]			15.13%	[16]
Spread		11%	[12]			11%	[12]			11%	[16]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						142
Amount of Interest, Fees or Dividends Credited to Income						1,863
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16]					23,429
Gross Additions						171
Gross Reductions						800
Ending balance	[12]	$ 22,800				22,800
Fair value		$ 22,800	[12]			$ 22,800	[12]			$ 23,429	[16]
Investment, Identifier [Axis]: Ospemifene Royalty Sub LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		11.50%	[11],[21]			11.50%	[11],[21]			11.50%	[14],[22]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[22]					$ 103
Ending balance	[11],[21]	$ 75				75
Fair value		75	[11],[21]			75	[11],[21]			$ 103	[14],[22]
Investment, Identifier [Axis]: Other, Affiliate Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0		0
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		0		0		0		0
Fair value		0		0		0		0		0
Investment, Identifier [Axis]: Other, Control Investments
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		0				0
Fair value		0				0				0
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								4,130
Amount of Interest, Fees or Dividends Credited to Income								462
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								14,360
Gross Additions								4,130
Gross Reductions								0
Ending balance				18,490				18,490
Fair value				$ 18,490				$ 18,490
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						(880)
Amount of Interest, Fees or Dividends Credited to Income						157
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19]					18,950
Gross Additions						0
Gross Reductions						880
Ending balance	[20]	18,070				18,070
Fair value		18,070	[20]			18,070	[20]			18,950	[19]
Investment, Identifier [Axis]: PPL RVs, Inc., Common Stock 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						12
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						238
Gross Additions						12
Gross Reductions						0
Ending balance	[30]	250				250
Fair value		$ 250	[30]			$ 250	[30]			$ 238
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate				7.97%				7.97%
Spread				7%				7%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								251
Amount of Interest, Fees or Dividends Credited to Income								683
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								12,381
Gross Additions								9,264
Gross Reductions								2,000
Ending balance				$ 19,645				19,645
Fair value				19,645				19,645
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		8.75%	[12],[13]			8.75%	[12],[13]			7%	[16],[17]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(1)
Amount of Interest, Fees or Dividends Credited to Income						1
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[17]					0
Gross Additions						1
Gross Reductions						1
Ending balance	[12],[13]	$ 0				0
Fair value		$ 0	[12],[13]			$ 0	[12],[13]			$ 0	[16],[17]
Investment, Identifier [Axis]: PPL RVs, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.63%	[12]			13.63%	[12]			10.25%	[16]
Spread		8.75%	[12]			8.75%	[12]			7%	[16]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(39)
Amount of Interest, Fees or Dividends Credited to Income						1,365
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16]					21,655
Gross Additions						39
Gross Reductions						1,404
Ending balance	[12]	$ 20,290				20,290
Fair value		$ 20,290	[12]			$ 20,290	[12]			$ 21,655	[16]
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[12],[33]	14.50%				14.50%
Spread		6.25%	[11],[12],[33]			6.25%	[11],[12],[33]			7.25%	[14],[15],[16],[17],[36]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17],[36]					$ (174)
Ending balance	[11],[12],[33]	$ 2,385				2,385
Fair value		$ 2,385	[11],[12],[33]			$ 2,385	[11],[12],[33]			$ (174)	[14],[15],[16],[17],[36]
Investment, Identifier [Axis]: PTL US Bidco, Inc, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.64%	[11],[12],[18],[33]			12.64%	[11],[12],[18],[33]			11.80%	[14],[15],[16],[36]
Spread		7.25%	[11],[12],[18],[33]			7.25%	[11],[12],[18],[33]			7.25%	[14],[15],[16],[36]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[36]					$ 27,911
Ending balance	[11],[12],[18],[33]	$ 26,681				26,681
Fair value		$ 26,681	[11],[12],[18],[33]			$ 26,681	[11],[12],[18],[33]			$ 27,911	[14],[15],[16],[36]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.10%	[11],[12],[18]			11.10%	[11],[12],[18]			10.26%	[14],[15],[16]
Spread		5.75%	[11],[12],[18]			5.75%	[11],[12],[18]			5.75%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 530
Ending balance	[11],[12],[18]	$ 216				216
Fair value		$ 216	[11],[12],[18]			$ 216	[11],[12],[18]			$ 530	[14],[15],[16]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.92%	[11],[12],[18]			10.92%	[11],[12],[18]			9.96%	[14],[15],[16],[62]
Spread		5.75%	[11],[12],[18]			5.75%	[11],[12],[18]			5.75%	[14],[15],[16],[62]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[62]					$ 2,649
Ending balance	[11],[12],[18]	$ 3,221				3,221
Fair value		$ 3,221	[11],[12],[18]			$ 3,221	[11],[12],[18]			$ 2,649	[14],[15],[16],[62]
Investment, Identifier [Axis]: Paragon Healthcare, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.88%	[11],[12],[18]			10.88%	[11],[12],[18]			9.81%	[14],[15],[16]
Spread		5.75%	[11],[12],[18]			5.75%	[11],[12],[18]			5.75%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 17,939
Ending balance	[11],[12],[18]	$ 18,692				18,692
Fair value		18,692	[11],[12],[18]			18,692	[11],[12],[18]			$ 17,939	[14],[15],[16]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								12,780
Amount of Interest, Fees or Dividends Credited to Income								2,856
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								26,970
Gross Additions								12,780
Gross Reductions								0
Ending balance				39,750				39,750
Fair value				$ 39,750				$ 39,750
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						830
Amount of Interest, Fees or Dividends Credited to Income						5,708
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19]					43,260
Gross Additions						830
Gross Reductions						0
Ending balance	[20]	44,090				44,090
Fair value		$ 44,090	[20]			$ 44,090	[20]			43,260	[19]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%				12%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(61)
Amount of Interest, Fees or Dividends Credited to Income								1,942
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								32,674
Gross Additions								1,561
Gross Reductions								5,554
Ending balance				$ 28,681				28,681
Fair value				28,681				28,681
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%				12%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						4
Amount of Interest, Fees or Dividends Credited to Income						142
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[17]					0
Gross Additions						3,500
Gross Reductions						0
Ending balance		$ 3,500				3,500
Fair value		$ 3,500				$ 3,500				0	[17]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%				12%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						40
Amount of Interest, Fees or Dividends Credited to Income						534
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[17]					0
Gross Additions						13,500
Gross Reductions						0
Ending balance		$ 13,500				13,500
Fair value		$ 13,500				$ 13,500				$ 0	[17]
Investment, Identifier [Axis]: Pearl Meyer Topco LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12%				12%				12%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(35)
Amount of Interest, Fees or Dividends Credited to Income						1,722
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						28,681
Gross Additions						35
Gross Reductions						1,035
Ending balance		$ 27,681				27,681
Fair value		27,681				27,681				$ 28,681
Investment, Identifier [Axis]: Power System Solutions, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11]	1,234				1,234
Fair value	[11]	$ 1,234				$ 1,234
Investment, Identifier [Axis]: Power System Solutions, Secured Debt 1
Schedule of Investments [Line Items]
Spread	[11],[12],[13],[18]	6.75%				6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[13],[18]	$ (91)				$ (91)
Fair value	[11],[12],[13],[18]	$ (91)				$ (91)
Investment, Identifier [Axis]: Power System Solutions, Secured Debt 2
Schedule of Investments [Line Items]
Spread	[11],[12],[13],[18]	6.75%				6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[13],[18]	$ (91)				$ (91)
Fair value	[11],[12],[13],[18]	$ (91)				$ (91)
Investment, Identifier [Axis]: Power System Solutions, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	11.90%				11.90%
Spread	[11],[12],[18]	6.75%				6.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 17,965				$ 17,965
Fair value	[11],[12],[18]	$ 17,965				$ 17,965
Investment, Identifier [Axis]: PrimeFlight Aviation Services, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	11.94%				11.94%
Spread	[11],[12],[18]	6.85%				6.85%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 7,770				$ 7,770
Fair value	[11],[12],[18]	7,770				7,770
Investment, Identifier [Axis]: Principle Environmental, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(90)		30
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						590		710
Gross Additions						0		30
Gross Reductions						90		0
Ending balance		500		740		500		740
Fair value		500		740		500		740		590
Investment, Identifier [Axis]: Principle Environmental, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(1,940)		370
Amount of Interest, Fees or Dividends Credited to Income						429		437
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						12,420	[19]	11,160
Gross Additions						0		370
Gross Reductions						1,940		0
Ending balance		10,480	[20]	11,530		10,480	[20]	11,530
Fair value		$ 10,480	[20]	$ 11,530		$ 10,480	[20]	$ 11,530		12,420	[19]
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13%				13%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance		$ 5,817				$ 5,817
Fair value		5,817				5,817
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				13%				13%
Amount of Realized Gain/(Loss)						0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						0		86
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0	[17]	1,465
Gross Additions						0		6
Gross Reductions						0		1,000
Ending balance		0		$ 471		0		471
Fair value		$ 0		$ 471		$ 0		$ 471		$ 0	[17]
Investment, Identifier [Axis]: Principle Environmental, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%		13%		13%		13%		13%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						397		399
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						5,806		5,808
Gross Additions						11		12
Gross Reductions						0		0
Ending balance		$ 5,817		$ 5,820		5,817		5,820
Fair value		$ 5,817		5,820		$ 5,817		5,820		$ 5,806
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[11],[12],[13],[18]			6%	[11],[12],[13],[18]			6.25%	[14],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[17]					$ (18)
Ending balance	[11],[12],[13],[18]	$ (16)				(16)
Fair value		$ (16)	[11],[12],[13],[18]			$ (16)	[11],[12],[13],[18]			$ (18)	[14],[16],[17]
Investment, Identifier [Axis]: Project Eagle Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.22%	[11],[12],[18]			11.22%	[11],[12],[18]			10.64%	[14],[16]
Spread		6%	[11],[12],[18]			6%	[11],[12],[18]			6.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 29,419
Ending balance	[11],[12],[18]	$ 29,271				29,271
Fair value		29,271	[11],[12],[18]			29,271	[11],[12],[18]			$ 29,419	[14],[16]
Investment, Identifier [Axis]: Quality Lease Service, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(98)		76
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						525		2,149
Gross Additions						33		76
Gross Reductions						98		1,150
Ending balance		460		1,075		460		1,075
Fair value		460		$ 1,075		460		$ 1,075		525
Investment, Identifier [Axis]: Quality Lease Service, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		0				0
Fair value		0				0				0
Investment, Identifier [Axis]: Quality Lease Service, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%				12%
Amount of Realized Gain/(Loss)						(29,526)		$ (51)
Amount of Unrealized Gain/(Loss)						29,865		0
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0		0
Gross Additions						29,865		0
Gross Reductions						29,865		0
Ending balance		0		$ 0		0		0
Fair value		$ 0		0		$ 0		0		$ 0
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6.75%	[11],[12],[13],[18]			6.75%	[11],[12],[13],[18]			6.75%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (11)
Ending balance	[11],[12],[13],[18]	$ (37)				(37)
Fair value		$ (37)	[11],[12],[13],[18]			$ (37)	[11],[12],[13],[18]			$ (11)	[14],[15],[16],[17]
Investment, Identifier [Axis]: RA Outdoors LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.88%	[11],[12],[18]			11.88%	[11],[12],[18]			10.56%	[14],[15],[16]
Spread		6.75%	[11],[12],[18]			6.75%	[11],[12],[18]			6.75%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 12,094
Ending balance	[11],[12],[18]	$ 12,171				12,171
Fair value		12,171	[11],[12],[18]			12,171	[11],[12],[18]			$ 12,094	[14],[15],[16]
Investment, Identifier [Axis]: RM Bidder, LLC, Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					19
Ending balance	[11]	17				17
Fair value		17	[11]			17	[11]			19	[14]
Investment, Identifier [Axis]: RM Bidder, LLC, Warrants
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[63]					0
Ending balance	[11],[64]	0				0
Fair value		$ 0	[11],[64]			$ 0	[11],[64]			$ 0	[14],[63]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.01%	[11],[12],[18]			13.01%	[11],[12],[18]			12.02%	[14],[15],[16],[65]
Spread		7.75%	[11],[12],[18]			7.75%	[11],[12],[18]			7.75%	[14],[15],[16],[65]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[65]					$ 1,258
Ending balance	[11],[12],[18]	$ 1,645				1,645
Fair value		$ 1,645	[11],[12],[18]			$ 1,645	[11],[12],[18]			$ 1,258	[14],[15],[16],[65]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.01%	[11],[12],[18]			13.01%	[11],[12],[18]			11.49%	[14],[15],[16]
Spread		7.75%	[11],[12],[18]			7.75%	[11],[12],[18]			7.75%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 15,367
Ending balance	[11],[12],[18]	$ 13,985				13,985
Fair value		$ 13,985	[11],[12],[18]			$ 13,985	[11],[12],[18]			$ 15,367	[14],[15],[16]
Investment, Identifier [Axis]: Research Now Group, Inc. and Survey Sampling International, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.80%	[8],[12],[18]			10.80%	[8],[12],[18]			8.84%	[7],[16]
Spread		5.50%	[8],[12],[18]			5.50%	[8],[12],[18]			5.50%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]					$ 15,116
Ending balance	[8],[12],[18]	$ 14,238				14,238
Fair value		14,238	[8],[12],[18]			14,238	[8],[12],[18]			$ 15,116	[7],[16]
Investment, Identifier [Axis]: River Aggregates, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		100
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,620	[29]	3,280
Gross Additions						0		100
Gross Reductions						0		0
Ending balance		3,620	[30]	3,380		3,620	[30]	3,380
Fair value		3,620	[30]	3,380		3,620	[30]	3,380		3,620	[29]
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(8,740)		4,670
Amount of Interest, Fees or Dividends Credited to Income						0		279
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						14,880		11,070
Gross Additions						0		4,670
Gross Reductions						8,740		0
Ending balance		6,140		15,740		6,140		15,740
Fair value		6,140		$ 15,740		6,140		$ 15,740		14,880
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%				12%
Spread				11%				11%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								2,241
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								35,956
Gross Additions								43
Gross Reductions								225
Ending balance				$ 35,774				35,774
Fair value				35,774				35,774
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						16
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[17]					(35)
Gross Additions						4
Gross Reductions						0
Ending balance	[13]	(31)				(31)
Fair value		$ (31)	[13]			$ (31)	[13]			$ (35)	[16],[17]
Investment, Identifier [Axis]: Robbins Bros. Jewelry, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.50%				12.50%				12.50%	[16]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(444)
Amount of Interest, Fees or Dividends Credited to Income						2,255
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16]					35,404
Gross Additions						40
Gross Reductions						1,119
Ending balance		$ 34,325				34,325
Fair value		34,325				34,325				$ 35,404	[16]
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Preferred Member Units
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Ending balance		0				0
Fair value		$ 0				0				$ 0
Investment, Identifier [Axis]: Rocaceia, LLC (Quality Lease and Rental Holdings, LLC), Secured Debt
Schedule of Investments [Line Items]
Total Rate	[22],[28],[66]									12%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[22],[28],[66]					$ 0
Fair value	[22],[28],[66]									$ 0
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[14],[15],[16]									10.97%
Spread		6.50%	[11],[12],[13],[18]			6.50%	[11],[12],[13],[18]			6.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 311
Ending balance	[11],[12],[13],[18]	$ 0				0
Fair value		$ 0	[11],[12],[13],[18]			$ 0	[11],[12],[13],[18]			$ 311	[14],[15],[16]
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.65%	[11],[12],[18]			11.65%	[11],[12],[18]			10.32%	[14],[15],[16]
Spread		6.50%	[11],[12],[18]			6.50%	[11],[12],[18]			6.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 2,333
Ending balance	[11],[12],[18]	$ 2,333				2,333
Fair value		$ 2,333	[11],[12],[18]			$ 2,333	[11],[12],[18]			$ 2,333	[14],[15],[16]
Investment, Identifier [Axis]: Roof Opco, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.65%	[11],[12],[18],[67]			12.65%	[11],[12],[18],[67]			10.32%	[14],[15],[16]
Spread		7.50%	[11],[12],[18],[67]			7.50%	[11],[12],[18],[67]			6.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 3,173
Ending balance	[11],[12],[18],[67]	$ 4,418				4,418
Fair value		$ 4,418	[11],[12],[18],[67]			$ 4,418	[11],[12],[18],[67]			$ 3,173	[14],[15],[16]
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		13.43%	[11],[12],[18]			13.43%	[11],[12],[18]			13.02%	[14],[15],[16]
Spread		6%	[11],[12],[18]			6%	[11],[12],[18]			6.25%	[14],[15],[16]
PIK Rate		2%	[11],[12],[18]			2%	[11],[12],[18]			2%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 5,037
Ending balance	[11],[12],[18]	$ 5,343				5,343
Fair value		$ 5,343	[11],[12],[18]			$ 5,343	[11],[12],[18]			$ 5,037	[14],[15],[16]
Investment, Identifier [Axis]: Rug Doctor, LLC., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13.43%	[11],[12],[18]			13.43%	[11],[12],[18]			13.02%	[14],[15],[16]
Spread		6%	[11],[12],[18]			6%	[11],[12],[18]			6.25%	[14],[15],[16]
PIK Rate		2%	[11],[12],[18]			2%	[11],[12],[18]			2%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 7,478
Ending balance	[11],[12],[18]	$ 7,922				7,922
Fair value		7,922	[11],[12],[18]			7,922	[11],[12],[18]			$ 7,478	[14],[15],[16]
Investment, Identifier [Axis]: SI East, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						1,823		1,260
Amount of Interest, Fees or Dividends Credited to Income						639		345
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						13,650	[19]	11,570
Gross Additions						2,130		1,260
Gross Reductions						0		0
Ending balance		15,780	[20]	12,830		15,780	[20]	12,830
Fair value		15,780	[20]	$ 12,830		15,780	[20]	$ 12,830		13,650	[19]
Investment, Identifier [Axis]: SI East, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				10.25%				10.25%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(36)
Amount of Interest, Fees or Dividends Credited to Income								3,751
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								65,850
Gross Additions								36
Gross Reductions								1,525
Ending balance				$ 64,361				64,361
Fair value				64,361				64,361
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						14
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[17]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[13]	0				0
Fair value		$ 0	[13]			$ 0	[13]			$ 0	[17]
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.78%	[68]			12.78%	[68]			9.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						$ 89,786
Ending balance	[68]	$ 54,536				54,536
Fair value		$ 54,536	[68]			$ 54,536	[68]			$ 89,786
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 2.1
Schedule of Investments [Line Items]
Total Rate		12.78%				12.78%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						268
Amount of Interest, Fees or Dividends Credited to Income						568
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						54,536
Gross Reductions						0
Ending balance		$ 54,536				54,536
Fair value		54,536				54,536				0
Investment, Identifier [Axis]: SI East, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						(79)
Amount of Interest, Fees or Dividends Credited to Income						3,885
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						89,786
Gross Additions						0
Gross Reductions						89,786
Ending balance		0				0
Fair value		0				0				89,786
Investment, Identifier [Axis]: SIB Holdings, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					146
Ending balance	[11]	97				97
Fair value		$ 97	[11]			$ 97	[11]			$ 146	[14]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.68%	[11],[12],[18]			11.68%	[11],[12],[18]			11.01%	[14],[16]
Spread		6.25%	[11],[12],[18]			6.25%	[11],[12],[18]			6.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 393
Ending balance	[11],[12],[18]	$ 534				534
Fair value		$ 534	[11],[12],[18]			$ 534	[11],[12],[18]			$ 393	[14],[16]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.68%	[11],[12],[18]			11.68%	[11],[12],[18]			11.01%	[14],[16]
Spread		6.25%	[11],[12],[18]			6.25%	[11],[12],[18]			6.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 1,433
Ending balance	[11],[12],[18]	$ 1,387				1,387
Fair value		$ 1,387	[11],[12],[18]			$ 1,387	[11],[12],[18]			$ 1,433	[14],[16]
Investment, Identifier [Axis]: SIB Holdings, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.68%	[11],[12],[18]			11.68%	[11],[12],[18]			11.01%	[14],[16]
Spread		6.25%	[11],[12],[18]			6.25%	[11],[12],[18]			6.25%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 7,151
Ending balance	[11],[12],[18]	$ 6,899				6,899
Fair value		6,899	[11],[12],[18]			6,899	[11],[12],[18]			$ 7,151	[14],[16]
Investment, Identifier [Axis]: SPAU Holdings, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					639
Ending balance	[11]	550				550
Fair value		$ 550	[11]			$ 550	[11]			$ 639	[14]
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	12.96%				12.96%
Spread		7.50%	[11],[12],[18]			7.50%	[11],[12],[18]			7.50%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (57)
Ending balance	[11],[12],[18]	$ 958				958
Fair value		$ 958	[11],[12],[18]			$ 958	[11],[12],[18]			$ (57)	[14],[15],[16],[17]
Investment, Identifier [Axis]: SPAU Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.61%	[11],[12],[18]			12.61%	[11],[12],[18]			11.06%	[14],[15],[16]
Spread		7.50%	[11],[12],[18]			7.50%	[11],[12],[18]			7.50%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 15,928
Ending balance	[11],[12],[18]	$ 15,808				15,808
Fair value		15,808	[11],[12],[18]			15,808	[11],[12],[18]			$ 15,928	[14],[15],[16]
Investment, Identifier [Axis]: Savers, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[7],[15],[16]									10.34%
Spread	[7],[15],[16]									5.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[15],[16]					10,938
Fair value	[7],[15],[16]									$ 10,938
Investment, Identifier [Axis]: Slick Innovations, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						320		130
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,530	[19]	1,510
Gross Additions						320		130
Gross Reductions						0		0
Ending balance		1,850	[20]	1,640		1,850	[20]	1,640
Fair value		$ 1,850	[20]	$ 1,640		$ 1,850	[20]	$ 1,640		$ 1,530	[19]
Investment, Identifier [Axis]: Slick Innovations, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		14%		13%		14%		13%		14%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(22)		(28)
Amount of Interest, Fees or Dividends Credited to Income						980		340
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						13,840		5,320
Gross Additions						22		28
Gross Reductions						822		708
Ending balance		$ 13,040		$ 4,640		13,040		4,640
Fair value		13,040		4,640		13,040		4,640		$ 13,840
Investment, Identifier [Axis]: Slick Innovations, LLC, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								40
Amount of Interest, Fees or Dividends Credited to Income								0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								400
Gross Additions								40
Gross Reductions								0
Ending balance				440				440
Fair value				440				440
Investment, Identifier [Axis]: Sonic Systems International, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								64
Amount of Interest, Fees or Dividends Credited to Income								21
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,280	[14]	1,070
Gross Additions								350
Gross Reductions								0
Ending balance				1,420				1,420
Fair value				$ 1,420				$ 1,420		$ 1,280	[14]
Investment, Identifier [Axis]: Sonic Systems International, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				8.50%				8.50%		11.24%	[14],[16]
Spread				7.50%				7.50%		7.50%	[14],[16]
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(233)
Amount of Interest, Fees or Dividends Credited to Income								565
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						15,769	[14],[16]	11,757
Gross Additions								3,737
Gross Reductions								234
Ending balance				$ 15,260				15,260
Fair value				15,260				15,260		$ 15,769	[14],[16]
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					1,316
Ending balance	[11]	1,208				1,208
Fair value		$ 1,208	[11]			$ 1,208	[11]			$ 1,316	[14]
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		5.25%	[11],[12],[13]			5.25%	[11],[12],[13]			5.75%	[14],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[17]					$ (71)
Ending balance	[11],[12],[13]	$ (62)				(62)
Fair value		$ (62)	[11],[12],[13]			$ (62)	[11],[12],[13]			$ (71)	[14],[16],[17]
Investment, Identifier [Axis]: South Coast Terminals Holdings, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.90%	[11],[12]			10.90%	[11],[12]			9.69%	[14],[16]
Spread		5.25%	[11],[12]			5.25%	[11],[12]			5.75%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 41,255
Ending balance	[11],[12]	$ 35,094				35,094
Fair value		$ 35,094	[11],[12]			$ 35,094	[11],[12]			$ 41,255	[14],[16]
Investment, Identifier [Axis]: Staples Canada ULC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.26%	[11],[12],[33],[34],[69]			12.26%	[11],[12],[33],[34],[69]			11.83%	[14],[16],[36],[50],[70]
Spread		7%	[11],[12],[33],[34],[69]			7%	[11],[12],[33],[34],[69]			7%	[14],[16],[36],[50],[70]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[36],[50],[70]					$ 12,481
Ending balance	[11],[12],[33],[34],[69]	$ 11,660				11,660
Fair value		$ 11,660	[11],[12],[33],[34],[69]			$ 11,660	[11],[12],[33],[34],[69]			$ 12,481	[14],[16],[36],[50],[70]
Investment, Identifier [Axis]: Stellant Systems, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.91%	[8],[12],[18]			10.91%	[8],[12],[18]			10.05%	[7],[15],[16]
Spread		5.50%	[8],[12],[18]			5.50%	[8],[12],[18]			5.50%	[7],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[15],[16]					$ 7,166
Ending balance	[8],[12],[18]	$ 7,234				7,234
Fair value		7,234	[8],[12],[18]			7,234	[8],[12],[18]			$ 7,166	[7],[15],[16]
Investment, Identifier [Axis]: Student Resource Center, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[11]	0				0
Fair value		$ 0	[11]			$ 0	[11]			$ 0	[14]
Investment, Identifier [Axis]: Student Resource Center, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		8.50%	[11]			8.50%	[11]			13.27%	[14]
Spread	[14]									8.50%
PIK Rate	[11]	8.50%				8.50%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						216
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					4,556
Gross Additions						214
Gross Reductions						0
Ending balance	[11]	$ 4,770				4,770
Fair value		4,770	[11]			4,770	[11]			$ 4,556	[14]
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						1,140		0
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						4,500		4,500
Gross Additions						1,140		0
Gross Reductions						0		0
Ending balance		5,640		4,500		5,640		4,500
Fair value		$ 5,640		$ 4,500		$ 5,640		$ 4,500		$ 4,500
Investment, Identifier [Axis]: Superior Rigging & Erecting Co., Secured Debt
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%		12%		12%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						1,285		1,320
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						21,378		21,332
Gross Additions						27		23
Gross Reductions						1,000		0
Ending balance		$ 20,405		$ 21,355		20,405		21,355
Fair value		$ 20,405		21,355		20,405		21,355		$ 21,378
Investment, Identifier [Axis]: Tacala Investment Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[16],[71],[72]									7.88%
Spread	[16],[71],[72]									3.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[71],[72]					$ 1,904
Fair value	[16],[71],[72]									$ 1,904
Investment, Identifier [Axis]: Team Public Choices, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.27%	[8],[12],[18]			10.27%	[8],[12],[18]			9.93%	[7],[16]
Spread		5%	[8],[12],[18]			5%	[8],[12],[18]			5%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]					$ 14,290
Ending balance	[8],[12],[18]	$ 14,466				14,466
Fair value		14,466	[8],[12],[18]			14,466	[8],[12],[18]			$ 14,290	[7],[16]
Investment, Identifier [Axis]: Tectonic Financial, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[19]					5,630
Ending balance	[20]	5,170				5,170
Fair value		5,170	[20]			5,170	[20]			5,630	[19]
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								(1,487)
Amount of Interest, Fees or Dividends Credited to Income								0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						7,681		8,579
Gross Additions								222
Gross Reductions								1,487
Ending balance				7,314				7,314
Fair value				$ 7,314				$ 7,314		7,681
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						(1,391)
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						7,681
Gross Additions						0
Gross Reductions						1,391
Ending balance		6,290				6,290
Fair value		6,290				6,290				7,681
Investment, Identifier [Axis]: Tedder Industries, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						178
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						533
Gross Reductions						0
Ending balance		533				533
Fair value		$ 533				$ 533				$ 0
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%		12%		12%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						111		961
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,840		15,141
Gross Additions						0		44
Gross Reductions						0		0
Ending balance		$ 1,840		$ 15,185		1,840		15,185
Fair value		$ 1,840		15,185		$ 1,840		15,185		$ 1,840
Investment, Identifier [Axis]: Tedder Industries, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%				12%				12%
Amount of Realized Gain/(Loss)						$ 0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						923		102
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						15,120		1,040
Gross Additions						7		800
Gross Reductions						0		0
Ending balance		$ 15,127		1,840		15,127		1,840
Fair value		15,127		1,840		15,127		1,840		$ 15,120
Investment, Identifier [Axis]: Televerde, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						674		(2,135)
Amount of Interest, Fees or Dividends Credited to Income						592		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						5,408		7,280
Gross Additions						674		0
Gross Reductions						0		2,135
Ending balance		6,082	[20]	5,145		6,082	[20]	5,145
Fair value		6,082	[20]	5,145		6,082	[20]	5,145		5,408
Investment, Identifier [Axis]: Televerde, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		1,076
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,794		0
Gross Additions						0		1,794
Gross Reductions						0		0
Ending balance		1,794		1,794		1,794		1,794
Fair value		1,794		1,794		1,794		1,794		1,794
Investment, Identifier [Axis]: Tex Tech Tennis, LLC, Preferred Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[29]					1,830
Ending balance	[11],[30]	2,040				2,040
Fair value		2,040	[11],[30]			2,040	[11],[30]			1,830	[14],[29]
Investment, Identifier [Axis]: The Affiliati Network, LLC, Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						80		302
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						6,400	[19]	6,400
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		6,400	[20]	6,400		6,400	[20]	6,400
Fair value		6,400	[20]	$ 6,400		6,400	[20]	$ 6,400		$ 6,400	[19]
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				11.83%				11.83%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								794
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								13,096
Gross Additions								2,187
Gross Reductions								3,640
Ending balance				$ 11,643				11,643
Fair value				11,643				11,643
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate										13%
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						12
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						106
Gross Additions						1,962
Gross Reductions						2,080
Ending balance	[13]	(12)				(12)
Fair value		$ (12)	[13]			$ (12)	[13]			$ 106
Investment, Identifier [Axis]: The Affiliati Network, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		13%				13%				13%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(129)
Amount of Interest, Fees or Dividends Credited to Income						607
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						9,442
Gross Additions						15
Gross Reductions						729
Ending balance		$ 8,728				8,728
Fair value		8,728				8,728				$ 9,442
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						3,970		(570)
Amount of Interest, Fees or Dividends Credited to Income						58		58
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						7,800	[19]	8,660
Gross Additions						3,970		0
Gross Reductions						0		570
Ending balance		11,770	[20]	8,090		11,770	[20]	8,090
Fair value		11,770	[20]	$ 8,090		11,770	[20]	$ 8,090		7,800	[19]
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				12%				12%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								(12)
Amount of Interest, Fees or Dividends Credited to Income								528
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								8,712
Gross Additions								14
Gross Reductions								412
Ending balance				$ 8,314				8,314
Fair value				8,314				8,314
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						(2)
Amount of Interest, Fees or Dividends Credited to Income						4
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[17]					0
Gross Additions						2
Gross Reductions						2
Ending balance	[13]	0				0
Fair value		$ 0	[13]			$ 0	[13]			$ 0	[17]
Investment, Identifier [Axis]: Trantech Radiator Topco, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12%				12%				12%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						(9)
Amount of Interest, Fees or Dividends Credited to Income						487
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						7,920
Gross Additions						9
Gross Reductions						9
Ending balance		$ 7,920				7,920
Fair value		$ 7,920				7,920				$ 7,920
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[7],[15],[16]									11.57%
Spread	[7],[15],[16]									1.25%
PIK Rate	[7],[15],[16]									7.25%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[15],[16]					$ 6,859
Fair value	[7],[15],[16]									$ 6,859
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[8],[12],[18]	6%				6%
Spread	[8],[12],[18]	1%				1%
PIK Rate	[8],[12],[18]	6%				6%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[8],[12],[18]	$ 3,924				$ 3,924
Fair value	[8],[12],[18]	$ 3,924				$ 3,924
Investment, Identifier [Axis]: U.S. TelePacific Corp., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[8],[12],[18]	6%				6%
Spread	[8],[12],[18]	1%				1%
PIK Rate	[8],[12],[18]	6%				6%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[8],[12],[18]	$ 0				$ 0
Fair value	[8],[12],[18]	$ 0				$ 0
Investment, Identifier [Axis]: USA DeBusk LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10.94%	[11],[12]			10.94%	[11],[12]			9.82%	[14],[16]
Spread		5.75%	[11],[12]			5.75%	[11],[12]			5.75%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 33,577
Ending balance	[11],[12]	$ 33,407				33,407
Fair value		33,407	[11],[12]			33,407	[11],[12]			$ 33,577	[14],[16]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[8]	0				0
Fair value		$ 0	[8]			$ 0	[8]			$ 0	[7]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 1
Schedule of Investments [Line Items]
Total Rate		20%	[8],[20]			20%	[8],[20]			20%	[7],[19]
PIK Rate		20%	[8],[20]			20%	[8],[20]			20%	[7],[19]
Amount of Realized Gain/(Loss)						$ 0		0
Amount of Unrealized Gain/(Loss)						(221)		(181)
Amount of Interest, Fees or Dividends Credited to Income						221		181
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,833	[7],[19]	2,833
Gross Additions						221		181
Gross Reductions						221		181
Ending balance		$ 2,833	[8],[20]	2,833		2,833	[8],[20]	2,833
Fair value		$ 2,833	[8],[20]	2,833		$ 2,833	[8],[20]	2,833		$ 2,833	[7],[19]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 2
Schedule of Investments [Line Items]
Total Rate		20%	[8]			20%	[8]			20%	[7]
PIK Rate		20%	[8]			20%	[8]			20%	[7]
Amount of Realized Gain/(Loss)						$ 0		0
Amount of Unrealized Gain/(Loss)						1,668		393
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,991	[7]	1,498
Gross Additions						1,668		393
Gross Reductions						0		0
Ending balance		$ 3,659	[8]	1,891		3,659	[8]	1,891
Fair value		$ 3,659	[8]	$ 1,891		$ 3,659	[8]	$ 1,891		$ 1,991	[7]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 3
Schedule of Investments [Line Items]
Total Rate		19%	[8]			19%	[8]			19%	[7]
PIK Rate		19%	[8]			19%	[8]			19%	[7]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[8]	$ 0				0
Fair value		$ 0	[8]			$ 0	[8]			$ 0	[7]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Preferred Stock 4
Schedule of Investments [Line Items]
Total Rate		13.50%	[8]			13.50%	[8]			13.50%	[7]
PIK Rate		13.50%	[8]			13.50%	[8]			13.50%	[7]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[8]	$ 0				0
Fair value		$ 0	[8]			$ 0	[8]			$ 0	[7]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Convertible Debt
Schedule of Investments [Line Items]
Total Rate		15%	[8]	15%		15%	[8]	15%		15%	[7]
PIK Rate		15%	[8]	15%		15%	[8]	15%		15%	[7]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						1,380		72
Amount of Interest, Fees or Dividends Credited to Income						187		95
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						4,592	[7]	2,375
Gross Additions						1,567		309
Gross Reductions						0		96
Ending balance		$ 6,159	[8]	$ 2,588		6,159	[8]	2,588
Fair value		$ 6,159	[8]	$ 2,588		$ 6,159	[8]	$ 2,588		$ 4,592	[7]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate				9.07%				9.07%		10.76%	[7],[15],[16]
Spread		7.50%		5.50%		7.50%		5.50%		5.50%	[7],[15],[16]
PIK Rate				2%				2%		2%	[7],[15],[16]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						22		(9)
Amount of Interest, Fees or Dividends Credited to Income						(2)		18
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						382	[7],[15],[16]	371
Gross Additions						25		8
Gross Reductions						407		13
Ending balance		$ 0		$ 366		0		366
Fair value		$ 0		$ 366		$ 0		$ 366		$ 382	[7],[15],[16]
Investment, Identifier [Axis]: UniTek Global Services, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate				9.07%				9.07%		10.76%	[7],[15],[16]
Spread		7.50%		5.50%		7.50%		5.50%		5.50%	[7],[15],[16]
PIK Rate				2%				2%		2%	[7],[15],[16]
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						96		(47)
Amount of Interest, Fees or Dividends Credited to Income						282		88
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						1,712	[7],[15],[16]	1,852
Gross Additions						112		42
Gross Reductions						1,824		66
Ending balance		$ 0		$ 1,828		0		1,828
Fair value		0		1,828		0		1,828		$ 1,712	[7],[15],[16]
Investment, Identifier [Axis]: UnionRock Energy Fund II, LP, LP Interests
Schedule of Investments [Line Items]
Total Rate	[19],[35],[36],[37]									11.11%
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(964)		(997)
Amount of Interest, Fees or Dividends Credited to Income						25		55
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						5,855	[19],[35],[36],[37]	6,123
Gross Additions						531		1,324
Gross Reductions						1,162		3,582
Ending balance		5,224	[20],[33],[38],[39]	3,865		5,224	[20],[33],[38],[39]	3,865
Fair value		5,224	[20],[33],[38],[39]	3,865		5,224	[20],[33],[38],[39]	3,865		$ 5,855	[19],[35],[36],[37]
Investment, Identifier [Axis]: UnionRock Energy Fund III, LP, LP Interests
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						150
Gross Reductions						0
Ending balance	[33],[38],[39]	150				150
Fair value		150	[33],[38],[39]			150	[33],[38],[39]			0
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, LLC, Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[29]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[11],[30]	0				0
Fair value		$ 0	[11],[30]			$ 0	[11],[30]			$ 0	[14],[29]
Investment, Identifier [Axis]: Universal Wellhead Services Holdings, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Total Rate		14%	[11],[30]			14%	[11],[30]			14%	[14],[29]
PIK Rate		14%	[11],[30]			14%	[11],[30]			14%	[14],[29]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[29]					220
Gross Additions						0
Gross Reductions						0
Ending balance	[11],[30]	$ 220				220
Fair value		$ 220	[11],[30]			$ 220	[11],[30]			$ 220	[14],[29]
Investment, Identifier [Axis]: UserZoom Technologies, Inc., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	12.42%				12.42%
Spread	[11],[12],[18]	7.50%				7.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Ending balance	[11],[12],[18]	$ 3,890				$ 3,890
Fair value	[11],[12],[18]	3,890				3,890
Investment, Identifier [Axis]: VORTEQ Coil Finishers, LLC, Common Equity
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[19]					3,930
Ending balance	[11],[20]	3,810				3,810
Fair value		3,810	[11],[20]			3,810	[11],[20]			3,930	[14],[19]
Investment, Identifier [Axis]: VVS Holdco LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(100)		240
Amount of Interest, Fees or Dividends Credited to Income						215		200
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						11,940	[19],[29]	11,840
Gross Additions						0		240
Gross Reductions						100		0
Ending balance		11,840	[20],[30]	12,080		11,840	[20],[30]	12,080
Fair value		$ 11,840	[20],[30]	$ 12,080		$ 11,840	[20],[30]	$ 12,080		$ 11,940	[19],[29]
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate				11.50%				11.50%
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								1,821
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance								31,269
Gross Additions								34
Gross Reductions								1,201
Ending balance				$ 30,102				30,102
Fair value				30,102				30,102
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[12],[13],[30]			6%	[12],[13],[30]			6%	[16],[17],[29]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						15
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[16],[17],[29]					(21)
Gross Additions						11
Gross Reductions						0
Ending balance	[12],[13],[30]	$ (10)				(10)
Fair value		$ (10)	[12],[13],[30]			$ (10)	[12],[13],[30]			$ (21)	[16],[17],[29]
Investment, Identifier [Axis]: VVS Holdco LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.50%	[30]			11.50%	[30]			11.50%	[29]
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						1,768
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[29]					30,161
Gross Additions						39
Gross Reductions						1,242
Ending balance	[30]	$ 28,958				28,958
Fair value		$ 28,958	[30]			$ 28,958	[30]			$ 30,161	[29]
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		5.25%	[8],[12],[13],[18]			5.25%	[8],[12],[13],[18]			5.25%	[7],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16],[17]					$ (630)
Ending balance	[8],[12],[13],[18]	$ (519)				(519)
Fair value		$ (519)	[8],[12],[13],[18]			$ (519)	[8],[12],[13],[18]			$ (630)	[7],[16],[17]
Investment, Identifier [Axis]: Veregy Consolidated, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.31%	[8],[12],[18]			11.31%	[8],[12],[18]			10.41%	[7],[16]
Spread		6%	[8],[12],[18]			6%	[8],[12],[18]			6%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]					$ 15,479
Ending balance	[8],[12],[18]	$ 15,321				15,321
Fair value		15,321	[8],[12],[18]			15,321	[8],[12],[18]			$ 15,479	[7],[16]
Investment, Identifier [Axis]: Vida Capital, Inc, Secured Debt
Schedule of Investments [Line Items]
Total Rate	[7]									10.38%
Spread	[7]									6%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7]					12,049
Fair value	[7]									$ 12,049
Investment, Identifier [Axis]: Vision Interests, Inc., Series A Preferred Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						168		144
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,000	[19]	3,000
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		3,000	[20]	3,000		3,000	[20]	3,000
Fair value		3,000	[20]	3,000		3,000	[20]	3,000		3,000	[19]
Investment, Identifier [Axis]: Vistar Media, Inc., Preferred Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					2,250
Ending balance	[11]	2,340				2,340
Fair value		2,340	[11]			2,340	[11]			2,250	[14]
Investment, Identifier [Axis]: Volusion, LLC, Common Stock
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						(2,576)
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						2,576
Gross Reductions						2,576
Ending balance		0				0
Fair value		0				0				0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)								0
Amount of Unrealized Gain/(Loss)								(3,060)
Amount of Interest, Fees or Dividends Credited to Income								0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0		5,989
Gross Additions								0
Gross Reductions								3,059
Ending balance				2,930				2,930
Fair value				$ 2,930				$ 2,930		0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 1
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		0				0
Fair value		0				0				0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						(706)
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						11,446
Gross Reductions						706
Ending balance		10,740				10,740
Fair value		10,740				10,740				0
Investment, Identifier [Axis]: Volusion, LLC, Preferred Member Units 3
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						0
Gross Reductions						0
Ending balance		0				0
Fair value		$ 0				$ 0				$ 0
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		10%		11.50%		10%		11.50%		11.50%	[28]
Amount of Realized Gain/(Loss)								$ 0
Amount of Unrealized Gain/(Loss)								0
Amount of Interest, Fees or Dividends Credited to Income								992
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						$ 14,914	[28]	17,434
Gross Additions								0
Gross Reductions								350
Ending balance		$ 2,100		$ 17,084		2,100		17,084
Fair value		$ 2,100		$ 17,084		$ 2,100		$ 17,084		$ 14,914	[28]
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		10%				10%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						54
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0
Gross Additions						2,100
Gross Reductions						0
Ending balance		$ 2,100				2,100
Fair value		2,100				2,100				0
Investment, Identifier [Axis]: Volusion, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						(3,188)
Amount of Unrealized Gain/(Loss)						1,821
Amount of Interest, Fees or Dividends Credited to Income						166
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						14,914
Gross Additions						0
Gross Reductions						14,914
Ending balance		0				0
Fair value		0				0				$ 14,914
Investment, Identifier [Axis]: Volusion, LLC, Unsecured Convertible Debt
Schedule of Investments [Line Items]
Total Rate				8%				8%		8%
Amount of Realized Gain/(Loss)						(409)		$ 0
Amount of Unrealized Gain/(Loss)						409		0
Amount of Interest, Fees or Dividends Credited to Income						0		16
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						0		409
Gross Additions						409		0
Gross Reductions						409		0
Ending balance		0		$ 409		0		409
Fair value		0		409		0		409		$ 0
Investment, Identifier [Axis]: Volusion, LLC, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						2,576
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[9]					0
Gross Additions						0
Gross Reductions						0
Ending balance		0				0
Fair value		0				0				$ 0	[9]
Investment, Identifier [Axis]: Wahoo Fitness Acquisition L.L.C., Secured Debt
Schedule of Investments [Line Items]
Total Rate	[7],[15],[16]									10.64%
Spread	[7],[15],[16]									5.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[15],[16]					8,409
Fair value	[7],[15],[16]									$ 8,409
Investment, Identifier [Axis]: Wall Street Prep, Inc., Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					420
Ending balance	[11]	420				420
Fair value		$ 420	[11]			$ 420	[11]			$ 420	[14]
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Spread		7%	[11],[12],[13],[18]			7%	[11],[12],[13],[18]			7%	[14],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[17]					$ (6)
Ending balance	[11],[12],[13],[18]	$ (5)				(5)
Fair value		$ (5)	[11],[12],[13],[18]			$ (5)	[11],[12],[13],[18]			$ (6)	[14],[16],[17]
Investment, Identifier [Axis]: Wall Street Prep, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.19%	[11],[12],[18]			12.19%	[11],[12],[18]			10.74%	[14],[16]
Spread		7%	[11],[12],[18]			7%	[11],[12],[18]			7%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 4,146
Ending balance	[11],[12],[18]	$ 3,747				3,747
Fair value		$ 3,747	[11],[12],[18]			$ 3,747	[11],[12],[18]			$ 4,146	[14],[16]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		11.64%	[11],[12],[18],[73]			11.64%	[11],[12],[18],[73]			10.73%	[14],[16]
Spread		6.25%	[11],[12],[18],[73]			6.25%	[11],[12],[18],[73]			6%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 370
Ending balance	[11],[12],[18],[73]	$ 1,482				1,482
Fair value		$ 1,482	[11],[12],[18],[73]			$ 1,482	[11],[12],[18],[73]			$ 370	[14],[16]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		11.64%	[11],[12],[18]			11.64%	[11],[12],[18]			10.73%	[14],[16]
Spread		6.25%	[11],[12],[18]			6.25%	[11],[12],[18]			6%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 391
Ending balance	[11],[12],[18]	$ 389				389
Fair value		$ 389	[11],[12],[18]			$ 389	[11],[12],[18]			$ 391	[14],[16]
Investment, Identifier [Axis]: Watterson Brands, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		11.64%	[11],[12],[18]			11.64%	[11],[12],[18]			10.73%	[14],[16]
Spread		6.25%	[11],[12],[18]			6.25%	[11],[12],[18]			6%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 28,947
Ending balance	[11],[12],[18]	$ 28,811				28,811
Fair value		28,811	[11],[12],[18]			28,811	[11],[12],[18]			$ 28,947	[14],[16]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Common Stock
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					1,950
Ending balance	[11]	2,390				2,390
Fair value		$ 2,390	[11]			$ 2,390	[11]			$ 1,950	[14]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		6%	[11],[12],[13],[18]			6%	[11],[12],[13],[18]			6%	[14],[15],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[17]					$ (20)
Ending balance	[11],[12],[13],[18]	$ (18)				(18)
Fair value		$ (18)	[11],[12],[13],[18]			$ (18)	[11],[12],[13],[18]			$ (20)	[14],[15],[16],[17]
Investment, Identifier [Axis]: West Star Aviation Acquisition, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.79%	[11],[12],[18]			10.79%	[11],[12],[18]			8.59%	[14],[15],[16]
Spread		6%	[11],[12],[18]			6%	[11],[12],[18]			6%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 10,685
Ending balance	[11],[12],[18]	$ 10,712				10,712
Fair value		$ 10,712	[11],[12],[18]			$ 10,712	[11],[12],[18]			$ 10,685	[14],[15],[16]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 1
Schedule of Investments [Line Items]
Spread		7%	[11],[12],[13],[18]			7%	[11],[12],[13],[18]			7%	[14],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[17]					$ 0
Ending balance	[11],[12],[13],[18]	$ 0				0
Fair value		$ 0	[11],[12],[13],[18]			$ 0	[11],[12],[13],[18]			$ 0	[14],[16],[17]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate	[11],[12],[18]	12.55%				12.55%
Spread		7%	[11],[12],[18]			7%	[11],[12],[18]			7%	[14],[16],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16],[17]					$ (17)
Ending balance	[11],[12],[18]	$ 2,030				2,030
Fair value		$ 2,030	[11],[12],[18]			$ 2,030	[11],[12],[18]			$ (17)	[14],[16],[17]
Investment, Identifier [Axis]: Winter Services LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		12.17%	[11],[12],[18]			12.17%	[11],[12],[18]			10.74%	[14],[16]
Spread		7%	[11],[12],[18]			7%	[11],[12],[18]			7%	[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[16]					$ 9,992
Ending balance	[11],[12],[18]	$ 9,300				9,300
Fair value		9,300	[11],[12],[18]			9,300	[11],[12],[18]			$ 9,992	[14],[16]
Investment, Identifier [Axis]: World Micro Holdings, LLC, Preferred Equity
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						139
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						3,845
Gross Additions						0
Gross Reductions						0
Ending balance	[20]	3,845				3,845
Fair value		$ 3,845	[20]			$ 3,845	[20]			$ 3,845
Investment, Identifier [Axis]: World Micro Holdings, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		13%				13%				13%
Amount of Realized Gain/(Loss)						$ 0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						948
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						14,140
Gross Additions						14
Gross Reductions						0
Ending balance		$ 14,154				14,154
Fair value		$ 14,154				$ 14,154				$ 14,140
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 1
Schedule of Investments [Line Items]
Total Rate	[11],[18]	10.41%				10.41%
Spread		5.25%	[11],[18]			5.25%	[11],[18]			5.25%	[14],[17]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[17]					$ (218)
Ending balance	[11],[18]	$ 3,192				3,192
Fair value		$ 3,192	[11],[18]			$ 3,192	[11],[18]			$ (218)	[14],[17]
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		10.58%	[11],[18]			10.58%	[11],[18]			10.84%	[14]
Spread		5.25%	[11],[18]			5.25%	[11],[18]			5.25%	[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					$ 24,135
Ending balance	[11],[18]	$ 24,239				24,239
Fair value		$ 24,239	[11],[18]			$ 24,239	[11],[18]			$ 24,135	[14]
Investment, Identifier [Axis]: Xenon Arc, Inc., Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		10.35%	[11],[18]			10.35%	[11],[18]			8.63%	[14]
Spread		5.25%	[11],[18]			5.25%	[11],[18]			5.25%	[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14]					$ 38,051
Ending balance	[11],[18]	$ 38,021				38,021
Fair value		$ 38,021	[11],[18]			$ 38,021	[11],[18]			$ 38,051	[14]
Investment, Identifier [Axis]: YS Garments, LLC, Secured Debt
Schedule of Investments [Line Items]
Total Rate		12.59%	[8],[12],[18]			12.59%	[8],[12],[18]			9.51%	[7],[16]
Spread		7.50%	[8],[12],[18]			7.50%	[8],[12],[18]			5.50%	[7],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[7],[16]					$ 12,127
Ending balance	[8],[12],[18]	$ 11,484				11,484
Fair value		11,484	[8],[12],[18]			11,484	[8],[12],[18]			$ 12,127	[7],[16]
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Preferred Member Units
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0		0
Amount of Unrealized Gain/(Loss)						(170)		(450)
Amount of Interest, Fees or Dividends Credited to Income						0		0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						240		2,130
Gross Additions						0		0
Gross Reductions						170		450
Ending balance		70		1,680		70		1,680
Fair value		$ 70		$ 1,680		$ 70		$ 1,680		$ 240
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12%		12%		12%		12%		12%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						27		38
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						450		625
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		$ 450		$ 625		450		625
Fair value		$ 450		$ 625		$ 450		$ 625		$ 450
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		6.50%		6.50%		6.50%		6.50%		6.50%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						0		0
Amount of Interest, Fees or Dividends Credited to Income						33		33
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						945		1,000
Gross Additions						0		0
Gross Reductions						0		0
Ending balance		$ 945		$ 1,000		945		1,000
Fair value		$ 945		$ 1,000		$ 945		$ 1,000		$ 945
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Secured Debt 3
Schedule of Investments [Line Items]
Total Rate		14%		14%		14%		14%		14%
Amount of Realized Gain/(Loss)						$ 0		$ 0
Amount of Unrealized Gain/(Loss)						(215)		0
Amount of Interest, Fees or Dividends Credited to Income						194		194
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance						2,676		2,750
Gross Additions						0		0
Gross Reductions						215		0
Ending balance		$ 2,461		$ 2,750		2,461		2,750
Fair value		2,461		$ 2,750		2,461		$ 2,750		$ 2,676
Investment, Identifier [Axis]: Ziegler’s NYPD, LLC, Warrants
Schedule of Investments [Line Items]
Amount of Realized Gain/(Loss)						0
Amount of Unrealized Gain/(Loss)						0
Amount of Interest, Fees or Dividends Credited to Income						0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[9]					0
Gross Additions						0
Gross Reductions						0
Ending balance	[10]	0				0
Fair value		$ 0	[10]			$ 0	[10]			$ 0	[9]
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 1
Schedule of Investments [Line Items]
Total Rate		12.50%	[11],[12],[18],[55]			12.50%	[11],[12],[18],[55]			11.67%	[14],[15],[16]
Spread		7.25%	[11],[12],[18],[55]			7.25%	[11],[12],[18],[55]			7.25%	[14],[15],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16]					$ 17,512
Ending balance	[11],[12],[18],[55]	$ 17,277				17,277
Fair value		$ 17,277	[11],[12],[18],[55]			$ 17,277	[11],[12],[18],[55]			$ 17,512	[14],[15],[16]
Investment, Identifier [Axis]: Zips Car Wash, LLC, Secured Debt 2
Schedule of Investments [Line Items]
Total Rate		12.46%	[11],[12],[18],[55]			12.46%	[11],[12],[18],[55]			11.67%	[14],[15],[16],[72]
Spread		7.25%	[11],[12],[18],[55]			7.25%	[11],[12],[18],[55]			7.25%	[14],[15],[16],[72]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance	[14],[15],[16],[72]					$ 4,379
Ending balance	[11],[12],[18],[55]	$ 4,309				4,309
Fair value		$ 4,309	[11],[12],[18],[55]			$ 4,309	[11],[12],[18],[55]			$ 4,379	[14],[15],[16],[72]

[1] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. Middle Market portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Middle Market portfolio investments. Middle Market portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Middle Market portfolio investments. Private Loan portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Private Loan portfolio investments. Private Loan portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Private Loan portfolio investments. Other Portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Other Portfolio investments. Other Portfolio investment. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for a description of Other Portfolio investments. Short-term portfolio investments. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of short-term portfolio investments.