Franklin Street Properties (FSP) 10-Q29 Oct 242024 Q3 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2024	Oct. 24, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	001-32470
Entity Registrant Name	Franklin Street Properties Corp.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	04-3578653
Entity Address, Address Line One	401 Edgewater Place, Suite 200
Entity Address, City or Town	Wakefield
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01880
City Area Code	781
Local Phone Number	557-1300
Title of 12(b) Security	Common Stock
Trading Symbol	FSP
Security Exchange Name	NYSEAMER
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		103,566,715
Entity Central Index Key	0001031316
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Real estate assets:
Land (amounts related to variable interest entities ("VIEs") of $6,416 and $6,416 at September 30, 2024 and December 31, 2023, respectively)	$ 105,298	$ 110,298
Buildings and improvements (amounts related to VIEs of $13,279 and $13,279 at September 30, 2024 and December 31, 2023, respectively)	1,090,551	1,133,971
Fixtures and equipment	10,776	12,904
Total real estate assets, gross	1,206,625	1,257,173
Less accumulated depreciation (amounts related to VIEs of $597 and $341 at September 30, 2024 and December 31, 2023, respectively)	369,276	366,349
Real estate assets, net (amounts related to VIEs of $19,098 and $19,354 at September 30, 2024 and December 31, 2023, respectively)	837,349	890,824
Acquired real estate leases, less accumulated amortization of $16,465 and $20,413, respectively (amounts related to VIEs of $67 and $305, less accumulated amortization of $30 and $222 at September 30, 2024 and December 31, 2023, respectively)	4,695	6,694
Assets held for sale	32,926	73,318
Cash, cash equivalents and restricted cash (amounts related to VIEs of $1,608 and $2,167 at September 30, 2024 and December 31, 2023, respectively)	42,375	127,880
Tenant rent receivables	1,349	2,191
Straight-line rent receivable	38,432	40,397
Prepaid expenses and other assets	3,243	4,239
Office computers and furniture, net of accumulated depreciation of $1,063 and $1,020, respectively	80	123
Deferred leasing commissions, net of accumulated amortization of $14,724 and $16,008, respectively	21,064	23,664
Total assets	981,513	1,169,330
Liabilities:
Bank note payable		90,000
Term loans payable, less unamortized financing costs of $2,956 and $293, respectively	137,601	114,707
Series A & Series B Senior Notes, less unamortized financing costs of $1,585 and $329, respectively	135,545	199,670
Accounts payable and accrued expenses (amounts related to VIEs of $643 and $590 at September 30, 2024 and December 31, 2023, respectively)	32,821	41,879
Accrued compensation	3,193	3,644
Tenant security deposits	6,120	6,204
Lease liability	763	334
Acquired unfavorable real estate leases, less accumulated amortization of $310 and $396, respectively	51	87
Total liabilities	316,094	456,525
Commitments and contingencies
Stockholders' Equity:
Preferred stock, $.0001 par value, 20,000,000 shares authorized, none issued or outstanding
Common stock, $.0001 par value, 180,000,000 shares authorized, 103,566,715 and 103,430,353 shares issued and outstanding, respectively	10	10
Additional paid-in capital	1,335,361	1,335,091
Accumulated other comprehensive income		355
Accumulated distributions in excess of accumulated earnings	(669,952)	(622,651)
Total stockholders' equity	665,419	712,805
Total liabilities and stockholders' equity	$ 981,513	$ 1,169,330

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Land amounts related to variable interest entities ("VIEs")	$ 105,298	$ 110,298
Buildings and improvements amounts related to variable interest entities ("VIEs")	1,090,551	1,133,971
Less accumulated depreciation amounts related to variable interest entities ("VIEs")	369,276	366,349
Real estate assets	837,349	890,824
Value of acquired real estate leases	4,695	6,694
Acquired real estate leases, accumulated amortization	16,465	20,413
Cash, cash equivalents and restricted cash (amounts related to variable interest entities ("VIEs")	42,375	127,880
Office computers and furniture, accumulated depreciation	1,063	1,020
Deferred leasing commissions, accumulated amortization	14,724	16,008
Term loan payable, unamortized financing costs	2,956	293
Series A & Series B Senior notes, unamortized financing costs	1,585	329
Accounts payable and accrued expenses amounts related to variable interest entities ("VIEs")	32,821	41,879
Acquired unfavorable real estate leases, accumulated amortization	$ 310	$ 396
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	180,000,000	180,000,000
Common stock, shares issued (in shares)	103,566,715	103,430,353
Common stock, shares outstanding (in shares)	103,566,715	103,430,353
Variable interest entities ("VIEs")
Land amounts related to variable interest entities ("VIEs")	$ 6,416	$ 6,416
Buildings and improvements amounts related to variable interest entities ("VIEs")	13,279	13,279
Less accumulated depreciation amounts related to variable interest entities ("VIEs")	597	341
Real estate assets	19,098	19,354
Value of acquired real estate leases	67	305
Acquired real estate leases, accumulated amortization	30	222
Cash, cash equivalents and restricted cash (amounts related to variable interest entities ("VIEs")	1,608	2,167
Accounts payable and accrued expenses amounts related to variable interest entities ("VIEs")	$ 643	$ 590

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues:
Total revenues	$ 29,682	$ 36,903	$ 91,737	$ 110,936
Expenses:
Real estate operating expenses	11,574	12,797	33,620	37,627
Real estate taxes and insurance	5,512	7,115	17,175	21,257
Depreciation and amortization	10,911	13,408	34,018	42,780
General and administrative	3,275	3,265	11,069	10,849
Interest	6,585	6,209	20,513	18,099
Total expenses	37,857	42,794	116,395	130,612
Loss on extinguishment of debt	(477)	(39)	(614)	(106)
Gain on consolidation of Sponsored REIT				394
Loss on sale of properties and impairment of assets held for sale, net	(7,254)	(39,671)	(20,459)	(32,085)
Interest income	340		1,696
Loss before taxes	(15,566)	(45,601)	(44,035)	(51,473)
Tax expense	56	70	162	212
Net loss	$ (15,622)	$ (45,671)	$ (44,197)	$ (51,685)
Weighted average number of shares outstanding, basic (in shares)	103,567	103,430	103,492	103,333
Weighted average number of shares outstanding, diluted (in shares)	103,567	103,430	103,492	103,333
Net loss per share, basic (in dollars per share)	$ (0.15)	$ (0.44)	$ (0.43)	$ (0.50)
Net loss per share, diluted (in dollars per share)	$ (0.15)	$ (0.44)	$ (0.43)	$ (0.50)
Rental
Revenues:
Rental	$ 29,662	$ 36,903	$ 91,705	$ 110,927
Other
Revenues:
Other	$ 20		$ 32	$ 9

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Consolidated Statements of Comprehensive Income (Loss)
Net loss	$ (15,622)	$ (45,671)	$ (44,197)	$ (51,685)
Other comprehensive income (loss):
Unrealized gain on derivative financial instruments				177
Reclassification from accumulated other comprehensive income into interest expense		(1,063)	(355)	(3,118)
Total other comprehensive loss	0	(1,063)	(355)	(2,941)
Comprehensive loss	$ (15,622)	$ (46,734)	$ (44,552)	$ (54,626)

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated other comprehensive income (loss)	Distributions in excess of accumulated earnings	Total
Balance at Dec. 31, 2022	$ 10	$ 1,334,776	$ 4,358	$ (570,408)	$ 768,736
Balance (in shares) at Dec. 31, 2022	103,236
Increase (Decrease) in Stockholders' Equity
Comprehensive income (loss)			(814)	2,406	1,592
Distributions				(1,033)	(1,033)
Balance at Mar. 31, 2023	$ 10	1,334,776	3,544	(569,035)	769,295
Balance (in shares) at Mar. 31, 2023	103,236
Balance at Dec. 31, 2022	$ 10	1,334,776	4,358	(570,408)	768,736
Balance (in shares) at Dec. 31, 2022	103,236
Increase (Decrease) in Stockholders' Equity
Comprehensive income (loss)					(54,626)
Balance at Sep. 30, 2023	$ 10	1,335,091	1,417	(625,192)	711,326
Balance (in shares) at Sep. 30, 2023	103,430
Balance at Dec. 31, 2022	$ 10	1,334,776	4,358	(570,408)	768,736
Balance (in shares) at Dec. 31, 2022	103,236
Balance at Dec. 31, 2023	$ 10	1,335,091	355	(622,651)	712,805
Balance (in shares) at Dec. 31, 2023	103,430
Balance at Mar. 31, 2023	$ 10	1,334,776	3,544	(569,035)	769,295
Balance (in shares) at Mar. 31, 2023	103,236
Increase (Decrease) in Stockholders' Equity
Comprehensive income (loss)			(1,064)	(8,420)	(9,484)
Equity-based compensation		315			315
Equity-based compensation (in shares)	194
Distributions				(1,032)	(1,032)
Balance at Jun. 30, 2023	$ 10	1,335,091	2,480	(578,487)	759,094
Balance (in shares) at Jun. 30, 2023	103,430
Increase (Decrease) in Stockholders' Equity
Comprehensive income (loss)			(1,063)	(45,671)	(46,734)
Distributions				(1,034)	(1,034)
Balance at Sep. 30, 2023	$ 10	1,335,091	1,417	(625,192)	711,326
Balance (in shares) at Sep. 30, 2023	103,430
Balance at Dec. 31, 2023	$ 10	1,335,091	355	(622,651)	712,805
Balance (in shares) at Dec. 31, 2023	103,430
Increase (Decrease) in Stockholders' Equity
Comprehensive income (loss)			(355)	(7,552)	(7,907)
Distributions				(1,034)	(1,034)
Balance at Mar. 31, 2024	$ 10	1,335,091		(631,237)	703,864
Balance (in shares) at Mar. 31, 2024	103,430
Balance at Dec. 31, 2023	$ 10	1,335,091	$ 355	(622,651)	712,805
Balance (in shares) at Dec. 31, 2023	103,430
Increase (Decrease) in Stockholders' Equity
Comprehensive income (loss)					(44,552)
Balance at Sep. 30, 2024	$ 10	1,335,361		(669,952)	665,419
Balance (in shares) at Sep. 30, 2024	103,567
Balance at Mar. 31, 2024	$ 10	1,335,091		(631,237)	703,864
Balance (in shares) at Mar. 31, 2024	103,430
Increase (Decrease) in Stockholders' Equity
Comprehensive income (loss)				(21,023)	(21,023)
Equity-based compensation		270			270
Equity-based compensation (in shares)	137
Distributions				(1,034)	(1,034)
Balance at Jun. 30, 2024	$ 10	1,335,361		(653,294)	682,077
Balance (in shares) at Jun. 30, 2024	103,567
Increase (Decrease) in Stockholders' Equity
Comprehensive income (loss)				(15,622)	(15,622)
Distributions				(1,036)	(1,036)
Balance at Sep. 30, 2024	$ 10	$ 1,335,361		$ (669,952)	$ 665,419
Balance (in shares) at Sep. 30, 2024	103,567

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023
Consolidated Statements of Stockholders' Equity
Distributions common stock (in dollars per share)	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.09	$ 0.01

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net loss	$ (44,197)	$ (51,685)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization expense	36,284	44,705
Amortization of above and below market leases	(17)	(39)
Shares issued as compensation	270	315
Amortization of other comprehensive income into interest expense	(355)	(2,789)
Loss on extinguishment of debt	614	106
Gain on consolidation of Sponsored REIT		(394)
Loss on sale of properties and impairment of assets held for sale, net	20,459	32,085
Changes in operating assets and liabilities:
Tenant rent receivables	842	(653)
Straight-line rents	1,249	427
Lease acquisition costs	(660)	(903)
Prepaid expenses and other assets	314	(644)
Accounts payable and accrued expenses	(4,364)	(2,516)
Accrued compensation	(451)	(465)
Tenant security deposits	(84)	(79)
Payment of deferred leasing commissions	(3,168)	(5,926)
Net cash provided by operating activities	6,736	11,545
Cash flows from investing activities:
Property improvements, fixtures and equipment	(19,074)	(26,024)
Consolidation of Sponsored REIT		3,048
Proceeds received from sales of properties	62,909	37,062
Net cash provided by investing activities	43,835	14,086
Cash flows from financing activities:
Distributions to stockholders	(3,104)	(3,099)
Proceeds received from termination of interest rate swap		4,206
Borrowings under Bank note payable		67,000
Repayments of Bank note payable	(22,667)	(35,000)
Repayments of Term loans payable	(41,775)	(50,000)
Repayments of Series A&B Senior Notes	(62,870)
Deferred financing costs	(5,660)	(2,327)
Net cash used in financing activities	(136,076)	(19,220)
Net increase (decrease) in cash, cash equivalents and restricted cash	(85,505)	6,411
Cash, cash equivalents and restricted cash, beginning of year	127,880	6,632
Cash, cash equivalents and restricted cash, end of period	42,375	13,043
Cash paid for:
Interest	16,038	16,704
Taxes	372	337
Non-cash investing activities:
Accrued costs for purchases of real estate assets	$ 2,266	2,562
Investment in related party mortgage loan receivable converted to real estate assets and acquired real estate leases in conjunction with variable interest entity consolidation		$ 20,000

Organization, Properties, Basis

Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards	9 Months Ended
	Sep. 30, 2024
Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards
Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards	1. Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards Organization Franklin Street Properties Corp. (“FSP Corp.” or the “Company”) holds, directly and indirectly, 100% of the interest in FSP Investments LLC, FSP Property Management LLC FSP Holdings LLC FSP Protective TRS Corp . FSP Property Management LLC provides asset management and property management services. The Company also has a non-controlling common stock interest in the corporation that is the sole member of FSP Monument Circle LLC, which corporation was organized to operate as a real estate investment trust (“Monument Circle” or the “Sponsored REIT”). As of September 30, 2024, the Company owned and operated a portfolio of real estate consisting of 15 operating properties, and the Sponsored REIT, which was consolidated effective January 1, 2023. The Company may pursue, on a selective basis, the sale of its properties in order to take advantage of the value creation and demand for its properties, for geographic, property specific reasons or for other general corporate purposes. Properties The following table summarizes the Company’s number of owned and consolidated properties and rentable square feet of real estate. As of September 30, 2024 2023 Owned and Consolidated Properties: Number of properties (1) 16 20 Rentable square feet 5,180,158 6,206,460 (1) Includes one property and three properties that were classified as assets held for sale as of September 30, 2024 and September 30, 2023, respectively. Basis of Presentation The unaudited consolidated financial statements of the Company include all of the accounts of the Company and its majority-owned and controlled subsidiaries. All significant intercompany balances and transactions have been eliminated. These financial statements should be read in conjunction with the Company’s consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for its fiscal year ended December 31, 2023, as filed with the Securities and Exchange Commission. The accompanying interim financial statements are unaudited; however, the financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) for interim financial information and in conjunction with the rules and regulations of the Securities and Exchange Commission. Accordingly, they do not include all of the disclosures required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting solely of normal recurring matters) necessary for a fair presentation of the financial statements for these interim periods have been included. Operating results for the three and nine months ended September 30, 2024 are not necessarily indicative of the results that may be expected for the year ending December 31, 2024 or for any other period. Financial Instruments As disclosed in Note 4, the Company’s derivatives were recorded at fair value using Level 2 inputs prior to their termination on February 8, 2023. The Company estimates that the carrying values of cash and cash equivalents, restricted cash, receivables, prepaid expenses, accounts payable and accrued expenses, accrued compensation, and tenant security deposits approximate their fair values based on their short-term maturity and the bank note and term loans payable approximate their fair values as they bear interest at variable interest rates or at rates that are at market for similar investments. Cash, Cash Equ ivalents and Restricted Cash The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statement of cash flows. September 30, September 30, (in thousands) 2024 2023 Cash and cash equivalents (1) $ 40,861 $ 13,043 Restricted cash 1,514 — Total cash, cash equivalents and restricted cash $ 42,375 $ 13,043 (1) Includes $1,608 and $2,445 at September 30, 2024 and 2023, respectively, pertaining to Monument Circle, which the Company is unable to utilize for its own operational purposes. Restricted cash consists of escrows arising from property sales. Cash held in escrow is paid based on the terms of the closing agreements for the sale. Variable Interest Entities (VIEs) The Company determines whether an entity is a VIE and, if so, whether it should be consolidated by utilizing judgments and estimates that are inherently subjective. The determination of whether an entity in which the Company holds a, direct or indirect, variable interest is a VIE is based on several factors, including whether the entity’s total equity investment at risk upon inception is sufficient to finance the entity’s activities without additional subordinated financial support. The Company makes judgments regarding the sufficiency of the equity at risk based first on a qualitative analysis, and then a quantitative analysis, if necessary. The Company analyzes any investments in VIEs to determine if the Company is the primary beneficiary. In evaluating whether the Company is the primary beneficiary, the Company evaluates its direct and indirect economic interests in the entity. Determining which reporting entity, if any, is the primary beneficiary of a VIE is primarily a qualitative approach focused on identifying which reporting entity has both (1) the power to direct the activities of a VIE that most significantly impact such entity’s economic performance and (2) the obligation to absorb losses or the right to receive benefits from such entity that could potentially be significant to such entity. Performance of that analysis requires the exercise of judgment. The Company considers a variety of factors in identifying the entity that holds the power to direct matters that most significantly impact the VIE’s economic performance including, but not limited to, the ability to direct a proposed sale of the property or merger of the company. In addition, the Company considers the rights of other investors to participate in those decisions, to replace the manager and to amend the corporate charter. The Company determines whether it is the primary beneficiary of a VIE at the time it becomes involved with a VIE and considers that conclusion upon a reconsideration event. As of January 1, 2023, the Company’s relationship with the Sponsored REIT was considered a VIE and the Company became the primary beneficiary. Upon this reconsideration event, the entity is included within the Company’s consolidated financial statements and all intercompany accounts and transactions have been eliminated in consolidation. A gain on consolidation of approximately million held by Monument Circle was included in the Company’s cash and cash equivalents upon consolidation and is reflected as “Consolidation of Sponsored REIT” in the consolidated statement of cash flows. The cash and cash equivalents held by Monument Circle are unable to be utilized for the Company’s operational purposes. The creditors of Monument Circle’s trade payables do not have any recourse against the Company. The consolidation value of Monument Circle was allocated to real estate investments and leases, including lease origination costs. Lease origination costs represent the value associated with acquiring an in-place lease (i.e. the market cost to execute a similar lease, including leasing commission, legal, vacancy, and other related costs). The value assigned to building approximates the replacement cost; the value assigned to land approximates its appraised value; and the value assigned to leases approximate their fair value. Other assets and liabilities are recorded at their historical costs, which approximates fair value. The Company assessed the fair value of the acquired real estate leases based on estimated cash flow projections that utilize appropriate discount rates and available market information. Such inputs are Level 3 in the fair value hierarchy. The following table summarizes the estimated fair value of the assets acquired at the date of consolidation, January 1, 2023: (in thousands) Real estate assets $ 19,695 Value of acquired real estate leases 305 Total $ 20,000 The following is quantitative information about significant unobservable inputs in the Company’s Level 3 measurement of the assets acquired in the consolidation of Monument Circle and were measured at fair value on a nonrecurring basis at January 1, 2023: Fair Value (1) at Significant Range Weighted Description January 1, 2023 Valuation Technique Unobservable Input Min Max Average (2) (in thousands) Monument Circle Consolidation $ 20,000 Discounted Cash Flows Exit Cap Rate 7.50 % 7.50 % 7.50 % Discount Rate 9.50 % 9.50 % 9.50 % (1) Classified within Level 3 of the fair value hierarchy. (2) Unobservable inputs were weighted based on the fair value of the related instrument. The relationships and investments related to the Sponsored REIT are summarized in Note 2. Recent Accounting Standards In October 2023, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2023-06, Disclosure Improvements: Codification Amendments in Response to the SEC’s Disclosure Update and Simplification Initiative (“ASU 2023-06”). ASU 2023-06 adds interim and annual disclosure requirements to GAAP at the request of the Securities and Exchange Commission. The guidance in ASU 2023-06 is required to be applied prospectively and the GAAP requirements will be effective when the removal of the related SEC disclosure requirements is effective. If the SEC does not act to remove its related requirements by June 30, 2027, any related FASB amendments will be removed from the Accounting Standards Codification and will not be effective. The Company does not anticipate that the adoption of ASU 2023-06 will have a material impact on the consolidated financial statements. In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (“ASU 2023-07”). ASU 2023-07 requires public entities to disclose significant segment expense and other segment items on an annual and interim basis and to provide in interim periods all disclosures about a reportable segment’s profit or loss and assets that are currently required annually. The guidance in ASU 2023-07 is applied retrospectively to all periods presented in the financial statements and is effective for public entities for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The Company does not anticipate that the adoption of ASU 2023-07 will have a material impact on the consolidated financial statements. In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures (“ASU 2023-09”). ASU 2023-09 enhances the transparency and decision usefulness of income tax disclosures and disclosures about income taxes paid. The guidance in ASU 2023-09 should be applied prospectively but may be applied retrospectively for each period presented. ASU 2023-09 is effective for public entities for fiscal years beginning after December 15, 2024. The Company does not anticipate that the adoption of ASU 2023-09 will have a material impact on the consolidated financial statements.

Related Party Transactions and

Related Party Transactions and Investments in Non-Consolidated Entities	9 Months Ended
	Sep. 30, 2024
Related Party Transactions and Investments in Non-Consolidated Entities
Related Party Transactions and Investments in Non-Consolidated Entities	2. Related Party Transactions and Investments in Non-Consolidated Entities Management fees and interest income from loans: Asset management fees range from 1% to 5% of collected rents and the applicable contracts are cancellable with 30 days notice. Prior to the consolidation of Monument Circle on January 1, 2023, the Company held the Sponsored REIT Loan, which was reported in the balance sheet as a related party mortgage loan receivable. The Company reviewed the need for an allowance under the current expected credit loss model for the Sponsored REIT Loan at each reporting period. The measurement of expected credit losses was based upon historical experiences, current conditions, and reasonable and supportable forecasts that affected the collectability of the reported amount. The Company elected to apply the practical expedient for financial assets secured by collateral in instances where the borrower was experiencing financial difficulty and repayment of the Sponsored REIT Loan was expected to be provided substantially through operation or sale of the collateral. The Company used the fair value of the collateral at the reporting date, and an adjustment to the allowance for expected credit losses was recorded when the amortized cost basis of the financial asset exceeded the fair value of the collateral, less costs to sell. The Company regularly evaluated the extent and impact of any credit deterioration that could affect performance and the value of the secured property, as well as the financial and operating capability of the borrower. A property’s fair value, operating results and existing cash balances were considered and used to assess whether cash flows from operations were sufficient to cover the current and future operating and debt service requirements. The Company also evaluated the borrower’s competency in managing and operating the secured property and considered the overall economic environment, real estate sector and geographic sub-market in which the secured property is located. The Company applied normal loan review and underwriting procedures (as may be implemented or modified from time to time) in making that judgment. The outstanding Sponsored REIT Loan is secured by a mortgage on the underlying property and the balances within the borrower’s cash accounts. The Company recognized no interest income and fees from the Sponsored REIT Loan for the nine months ended September 30, 2024 and 2023, respectively. On October 29, 2021, the Company agreed to amend and restate the then existing Sponsored REIT Loan to extend the maturity date from December 6, 2022 to June 30, 2023 and to advance an additional $3.0 million tranche of indebtedness to FSP Monument Circle LLC with the same June 30, 2023 maturity date, effectively increasing the aggregate principal amount of the Sponsored REIT Loan from $21 million to $24 million. In addition, the Company agreed to defer all principal and interest payments due under the Sponsored REIT Loan until the maturity date. As part of its consideration for agreeing to amend and restate the Sponsored REIT Loan, the Company obtained from the stockholders of the parent of Monument Circle the right to vote their shares in favor of any sale of the property owned by Monument Circle any time on or after January 1, 2023. There were no commitments to lend additional funds to the Sponsored REIT. On June 26, 2023, the Sponsored REIT Loan maturity was extended to September 30, 2023. On September 26, 2023, the Sponsored REIT Loan maturity was extended to September 30, 2024. On September 27, 2024, the Sponsored REIT Loan maturity was extended to September 30, 2025. The Company recorded a $4.2 million decrease in its provision for credit losses during the three months ended March 31, 2023. The change in the allowance for credit losses during the three months ended March 31, 2023 was due to the consolidation of Monument Circle. There were adjustments during the nine months ended September 30, 2024. The following table presents a roll-forward of the Company’s allowance for credit losses. For the Nine Months Ended September 30, (In thousands) 2024 2023 Beginning allowance for credit losses $ — $ (4,237) Additional increases to the allowance for credit losses — — Reductions to the allowance for credit losses — 4,237 Ending allowance for credit losses $ — $ —

Bank Note Payable, Term Loans P

Bank Note Payable, Term Loans Payable and Senior Notes	9 Months Ended
Bank Note Payable, Term Loans Payable and Senior Notes	Sep. 30, 2024
Bank Note Payable, Term Loans Payable and Senior Notes
Bank Note Payable, Term Loans Payable and Senior Notes	3. Bank Note Payable, Term Loans Payable and Senior Notes BMO Term Loan As of September 30, 2024, the Company has a term loan borrowing in the aggregate principal amount of approximately $78.8 million (the “BMO Term Loan”) with Bank of Montreal, as administrative agent, and the other lending institutions party thereto, that matures on April 1, 2026. On February 21, 2024, the Company amended the BMO Term Loan by entering into a Second Amendment to Second Amended and Restated Credit Agreement with Bank of Montreal and the other lending institutions party thereto (the “BMO Second Amendment”). The BMO Second Amendment amended the Second Amended and Restated Credit Agreement dated September 27, 2018 (the “Original BMO Credit Agreement”), as amended by the First Amendment to Second Amended and Restated Credit Agreement dated February 10, 2023 (the “BMO First Amendment”), to, among other things: (1) extend the maturity date from October 1, 2024 to April 1, 2026; (2) change the interest rate from either x. The Original BMO Credit Agreement, as amended by the BMO First Amendment and the BMO Second Amendment, is referred to as the BMO Credit Agreement. On February 21, 2024, as part of the BMO Second Amendment, the Company repaid an approximately $29.0 million portion of the BMO Term Loan. On July 10, 2024, the Company repaid an approximately million portion of the BMO Term Loan from asset sale proceeds of a property located in Glen Allen, Virginia. Effective February 21, 2024, upon entering into the BMO Second Amendment, the BMO Term Loan bears interest at either (i) 300 basis points over one three As of September 30, 2024, the interest rate on the BMO Term Loan was 8.00% per annum. The weighted average variable interest rate on all amounts outstanding under the BMO Term Loan was for the nine months ended September 30, 2024. As of December 31, 2023, the interest rate on the BMO Term Loan was per annum. The weighted average variable interest rate on all amounts outstanding under the BMO Term Loan from February 8, 2023, which is when the Company terminated its outstanding interest rate swaps applicable to the BMO Term Loan as described below, through December 31, 2023, was approximately Although the interest rate on the BMO Term Loan was variable under the BMO Credit Agreement, the Company fixed the base LIBOR interest rate that previously applied to the BMO Term Loan by entering into interest rate swap transactions. On February 20, 2019, the Company entered into ISDA Master Agreements with a group of banks that fixed the base LIBOR interest rate on the BMO Term Loan at 2.39% per annum for the period beginning on August 26, 2020 and ending January 31, 2024. On February 8, 2023, the Company terminated all outstanding interest rate swaps applicable to the BMO Term Loan and, on February 10, 2023, the Company received an aggregate of approximately million related to interest receivable. The BMO Credit Agreement contains customary affirmative and negative covenants for credit facilities of this type, including limitations with respect to indebtedness, liens, investments, mergers and acquisitions, disposition of assets, use of net cash proceeds from the disposition of property, assets and equity issuances, mandatory prepayments, the requirement to have certain subsidiaries provide guarantees, the requirement to pledge the Company’s equity interests in certain subsidiaries as collateral, changes in business, certain restricted payments, repurchases and redemptions of the Company’s common stock, going concern qualifications to the Company’s financial statements, and transactions with affiliates. In addition, the BMO Credit Agreement also restricts the Company’s ability to make quarterly dividend distributions that exceed $0.01 per share of the Company’s common stock; provided, however, that notwithstanding such restriction, the Company is permitted to make dividend distributions based on the Company’s good faith estimate of projected or estimated taxable income or otherwise as necessary to retain the Company’s status as a real estate investment trust, to meet the distribution requirements of Section 857 of the Internal Revenue Code or to eliminate any income or excise taxes to which the Company would otherwise be subject. The BMO Credit Agreement also contains financial covenants that require the Company to maintain a minimum tangible net worth, a maximum leverage ratio, a maximum secured leverage ratio, a maximum secured recourse leverage ratio, a minimum fixed charge coverage ratio, a maximum unencumbered leverage ratio, and minimum unsecured interest coverage. The Company was in compliance with the BMO Term Loan financial covenants as of September 30, 2024. The BMO Credit Agreement provides for customary events of default with corresponding grace periods, including failure to pay any principal or interest when due, certain cross defaults and a change in control of the Company (as defined in the BMO Credit Agreement). In the event of a default by the Company, the administrative agent may, and at the request of the requisite number of lenders shall, declare all obligations under the BMO Credit Agreement immediately due and payable, terminate the lenders’ commitments to make loans under the BMO Credit Agreement, and enforce any and all rights of the lenders or administrative agent under the BMO Credit Agreement and related documents. For certain events of default related to bankruptcy, insolvency, and receivership, the commitments of lenders will be automatically terminated and all outstanding obligations of the Company will become immediately due and payable. BofA Term Loan As of September 30, 2024, the Company has a term loan borrowing in the aggregate principal amount of approximately $61.7 million (the “BofA Term Loan”) with Bank of America, N.A. as administrative agent, and other lending institutions party thereto that matures on April 1, 2026. Prior to February 21, 2024, we referred to the BofA Term Loan as the BofA Revolver. On February 21, 2024, the Company amended the BofA Term Loan by entering into a Second Amendment to Credit Agreement with the lending institutions party thereto (the “BofA Second Amendment”). The BofA Second Amendment amended the Credit Agreement dated January 10, 2022 (the Original BofA Credit Agreement, as amended by the First Amendment to Credit Agreement dated February 10, 2023 (the “BofA First Amendment”) to, among other things: (1) extend the maturity date from October 1, 2024 to April 1, 2026; (2) convert borrowings from being either revolving loans or letters of credit to a term loan; (3) change the interest rate from 300 basis points over SOFR to 300 basis points over SOFR with a floor on SOFR of 500 basis points; (4) provide that, if, as of March 31, 2025, the aggregate principal amount outstanding under the BMO Term Loan, the BofA Term Loan and the Senior Notes exceeds $200 million, the spread over SOFR will permanently increase by 100 basis points from 300 basis points to 400 basis points; (5) require mandatory prepayments of the BMO Term Loan, the BofA Term Loan and the Senior Notes with net cash proceeds from the disposition of property, assets and equity issuances as follows: (a) 25.55556% to the BMO Term Loan; (b) 20.00000% to the BofA Term Loan; (c) 44.44444% to the Senior Notes; and (d) the remaining 10% to be retained by the Company; (6) require that, within 90 days of the February 21, 2024 effective date of the BofA Second Amendment, certain of the Company’s subsidiaries guarantee the BofA Term Loan; (7) require that, within 90 days of the February 21, 2024 effective date of the BofA Second Amendment, the Company pledge its equity interests in certain of the Company’s subsidiaries as collateral for the BofA Term Loan; (8) reduce the Company’s minimum fixed charge coverage ratio from 1.50x to 1.25x; and (9) reduce the Company’s minimum unsecured interest coverage ratio from 1.75x to 1.25x. The Original BofA Credit Agreement, as amended by the BofA First Amendment and the BofA Second Amendment, is referred to as the BofA Credit Agreement. On February 21, 2024, as part of the BofA Second Amendment, the Company repaid an approximately $22.7 million portion of the BofA Revolver. On July 10, 2024, the Company repaid an approximately million portion of the BofA Term Loan from asset sale proceeds of a property located in Glen Allen, Virginia. Effective February 21, 2024, upon entering into the BofA Second Amendment, the BofA Term Loan bears interest at 300 basis points over either (i) the daily simple SOFR, plus an adjustment of 0.11448%, or (ii) one three As of September 30, 2024, the interest rate on the BofA Term Loan was 8.00% per annum. The weighted average variable interest rate on all amounts outstanding under the BofA Term Loan was for the nine months ended September 30, 2024. As of December 31, 2023, the interest rate on the BofA Revolver was per annum. The weighted average variable interest rate on all amounts outstanding under the BofA Revolver through December 31, 2023 was approximately per annum. The BofA Credit Agreement contains customary affirmative and negative covenants for credit facilities of this type, including limitations with respect to indebtedness, liens, investments, mergers and acquisitions, disposition of assets, use of net cash proceeds from the disposition of property, assets and equity issuances, mandatory prepayments, the requirement to have certain subsidiaries provide guarantees, the requirement to pledge the Company’s equity interests in certain subsidiaries as collateral, changes in business, certain restricted payments, repurchases and redemptions of the Company’s common stock, going concern qualifications to the Company’s financial statements, and transactions with affiliates. In addition, the BofA Credit Agreement also restricts the Company’s ability to make quarterly dividend distributions that exceed $0.01 per share of the Company’s common stock; provided, however, that notwithstanding such restriction, the Company is permitted to make dividend distributions based on the Company’s good faith estimate of projected or estimated taxable income or otherwise as necessary to retain the Company’s status as a real estate investment trust, to meet the distribution requirements of Section 857 of the Internal Revenue Code or to eliminate any income or excise taxes to which the Company would otherwise be subject. The BofA Credit Agreement also contains financial covenants that require the Company to maintain a minimum tangible net worth, a maximum leverage ratio, a maximum secured leverage ratio, a maximum secured recourse leverage ratio, a minimum fixed charge coverage ratio, a maximum unencumbered leverage ratio, and minimum unsecured interest coverage. The Company was in compliance with the BofA Term Loan financial covenants as of September 30, 2024. The BofA Credit Agreement provides for customary events of default with corresponding grace periods, including failure to pay any principal or interest when due, failure to comply with the provisions of the BofA Credit Agreement, certain cross defaults and a change in control of the Company (as defined in the BofA Credit Agreement). In the event of a default by the Company, BofA, in its capacity as administrative agent, may, and at the request of the requisite number of lenders shall, declare all obligations under the BofA Credit Agreement immediately due and payable and enforce any and all rights of the lenders or BofA under the BofA Credit Agreement and related documents. For certain events of default related to bankruptcy, insolvency, and receivership, all outstanding obligations of the Company will become immediately due and payable. Senior Notes As of September 30, 2024, the Company has senior notes in the aggregate principal amount of approximately $137.1 million (the “Senior Notes”) that mature on April 1, 2026. The Senior Notes consist of (i) Series A Senior Notes due April 1, 2026 in an aggregate principal amount of approximately $79.5 million (the “Series A Notes”) and (ii) Series B Senior Notes due April 1, 2026 in the aggregate principal amount of approximately $57.6 million (the “Series B Notes”). On February 21, 2024, the Company amended the terms of the Senior Notes by entering into a First Amendment to Note Purchase Agreement (the “NPA First Amendment”) with the purchasers party thereto. The NPA First Amendment amended the Note Purchase Agreement dated October 24, 2017 (the “Original Note Purchase Agreement”) to, among other things: (1) extend the maturity date of the Series A Notes from December 20, 2024 to April 1, 2026; (2) shorten the maturity date of the Series B Notes from December 20, 2027 to April 1, 2026; (3) increase the interest rate applicable to the Series A Notes from of the February 21, 2024 effective date of the NPA First Amendment, the Company pledge its equity interests in certain of the Company’s subsidiaries as collateral for the Senior Notes; and (9) conform all financial covenants and negative covenants in the Note Purchase Agreement with the BofA Credit Agreement and the BMO Credit Agreement. The Original Note Purchase Agreement, as amended by the NPA First Amendment, is referred to as the Note Purchase Agreement. On February 21, 2024, as part of the NPA First Amendment, the Company repaid an approximately $29.2 million portion of the Series A Notes and an approximately $21.2 million portion of the Series B Notes. On July 10, 2024, the Company repaid an approximately million aggregate principal amount of the Series B Notes remained outstanding. As of September 30, 2024, the interest rate on the Series A Notes was 8.00% per annum and the interest rate on the Series B Notes was 8.00% per annum. As of December 31, 2023, the interest rate on the Series A Notes was per annum. The Note Purchase Agreement contains customary affirmative and negative covenants, including limitations with respect to indebtedness, liens, investments, mergers and acquisitions, disposition of assets, use of net cash proceeds from the disposition of property, assets and equity issuances, mandatory prepayments, the requirement to have certain subsidiaries provide guarantees, the requirement to pledge the Company’s equity interests in certain subsidiaries as collateral, changes in business, certain restricted payments, repurchases and redemptions of the Company’s common stock, going concern qualifications to the Company’s financial statements, transactions with affiliates, certain restrictions on severance, retention and similar arrangements applicable to the Company’s executive officers, and real estate investment trust compliance requirements. In addition, the Note Purchase Agreement also restricts the Company’s ability to make quarterly dividend distributions that exceed $0.01 per share of the Company’s common stock; provided, however, that notwithstanding such restriction, the Company is permitted to make dividend distributions based on the Company’s good faith estimate of projected or estimated taxable income or otherwise as necessary to retain the Company’s status as a real estate investment trust, to meet the distribution requirements of Section 857 of the Internal Revenue Code or to eliminate any income or excise taxes to which the Company would otherwise be subject. The Note Purchase Agreement also contains financial covenants that require the Company to maintain a minimum tangible net worth, a maximum leverage ratio, a maximum secured leverage ratio, a maximum secured recourse leverage ratio, a minimum fixed charge coverage ratio, a maximum unencumbered leverage ratio, and minimum unsecured interest coverage. The Company was in compliance with the Note Purchase Agreement financial covenants as of September 30, 2024. The Note Purchase Agreement contains customary events of default, including payment defaults, cross defaults with certain other indebtedness, breaches of covenants and bankruptcy events. In the case of an event of default, the purchasers may, among other remedies, accelerate the payment of all obligations.

Financial Instruments_ Derivati

Financial Instruments: Derivatives and Hedging	9 Months Ended
Financial Instruments: Derivatives and Hedging	Sep. 30, 2024
Financial Instruments: Derivatives and Hedging
Financial Instruments: Derivatives and Hedging	4. Financial Instruments: Derivatives and Hedging On February 20, 2019, the Company entered into interest rate swap transactions that fixed the interest rate for the period beginning August 26, 2020 and ending January 31, 2024 on the BMO Term Loan (the “2019 BMO Interest Rate Swap”). The variable rates that were fixed under the 2019 BMO Interest Rate Swap is described in Note 3. On February 8, 2023, the Company terminated the 2019 BMO Interest Rate Swap applicable to the BMO Term Loan and, on February 10, 2023, the Company received an aggregate of approximately million related to interest receivable. As of September 30, 2024, there were derivative instruments. The 2019 BMO Interest Rate Swap qualified as a cash flow hedge and has been recognized on the consolidated balance sheets at fair value. If a derivative qualifies as a hedge, depending on the nature of the hedge, changes in the fair value of the derivative will either be offset against the change in fair value of the hedged asset, liability, or firm commitment through earnings, or recognized in other comprehensive income until the hedged item is recognized in earnings. The ineffective portion of a derivative’s change in fair value will be recognized in earnings in the same period in which the hedged interest payments affect earnings, which may increase or decrease reported net income and stockholders’ equity prospectively, depending on future levels of interest rates and other variables affecting the fair values of derivative instruments and hedged items, but will have no effect on cash flows. The gain (loss) on the Company’s 2019 BMO Interest Rate Swap was recorded in other comprehensive income (loss) (OCI), and the accompanying consolidated statements of operations as a component of interest expense for the nine months ended September 30, 2024 and 2023, was as follows: (in thousands) Nine Months Ended September 30, Interest Rate Swaps in Cash Flow Hedging Relationships: 2024 2023 Amounts of gain recognized in OCI $ — $ 177 Amounts of previously recorded gain (loss) reclassified from OCI into Interest Expense $ 355 $ 2,055 Total amount of Interest Expense presented in the consolidated statements of operations $ 20,513 $ 11,890 Over time, the realized gains in accumulated other comprehensive income were reclassified into earnings as a decrease to interest expense in the same periods in which the hedged interest payments affected earnings. The Company hedged the exposure to variability in anticipated future interest payments on existing debt.

Net Income (Loss) Per Share

Net Income (Loss) Per Share	9 Months Ended
Net Income (Loss) Per Share	Sep. 30, 2024
Net Income (Loss) Per Share
Net Income (Loss) Per Share	5. Net Income (Loss) Per Share Basic net income (loss) per share is computed by dividing net income (loss) by the weighted average number of Company shares outstanding during the period. Diluted net income (loss) per share reflects the potential dilution that could occur if securities or other contracts to issue shares were exercised or converted into shares. There were potential dilutive shares outstanding at each of September 30, 2024 and 2023.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
Stockholders' Equity	Sep. 30, 2024
Stockholders' Equity
Stockholders' Equity	6. Stockholders’ Equity As of September 30, 2024, the Company had 103,566,715 shares of common stock outstanding. Dividends Per Total Quarter Paid Share Dividends 2024: First quarter of 2024 $ 0.01 $ 1,034 Second quarter of 2024 $ 0.01 $ 1,034 Third quarter of 2024 $ 0.01 $ 1,036 2023: First quarter of 2023 $ 0.01 $ 1,033 Second quarter of 2023 $ 0.01 $ 1,032 Third quarter of 2023 $ 0.01 $ 1,034 Equity-Based Compensation On May 20, 2002, the stockholders of the Company approved the 2002 Stock Incentive Plan (the “Plan”). The Plan is an equity-based incentive compensation plan and provides for the grants of up to a maximum of 2,000,000 shares of the Company’s common stock (“Awards”). All of the Company’s employees, officers, directors, consultants and advisors are eligible to be granted Awards. Awards under the Plan are made at the discretion of the Company’s Board of Directors, and have no vesting requirements. Upon granting an Award, the Company will recognize compensation cost equal to the fair value of the Company’s common stock, as determined by the Company’s Board of Directors, on the date of the grant. On May 31, 2024 and May 18, 2023, the Company granted shares under the Plan to non-employee directors with the compensation cost related to such grants indicated in the table below, which was recognized during the three months ended June 30, 2024 and year ended December 31, 2023, respectively, and is included in general and administrative expenses for such periods. Such shares were fully vested on the date of issuance. Shares Available Compensation for Grant Cost Balance December 31, 2022 1,696,687 $ 1,406,250 Shares granted 2023 (194,439) 314,991 Balance December 31, 2023 1,502,248 1,721,241 Shares granted 2024 (136,362) 269,997 Balance September 30, 2024 1,365,886 $ 1,991,238

Income Taxes

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2024
Income Taxes
Income Taxes	7. Income Taxes General The Company has elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). As a REIT, the Company generally is entitled to a tax deduction for distributions paid to its shareholders, thereby effectively subjecting the distributed net income of the Company to taxation at the shareholder level only. The Company must comply with a variety of restrictions to maintain its status as a REIT. These restrictions include the type of income it can earn, the type of assets it can hold, the number of shareholders it can have and the concentration of their ownership, and the amount of the Company’s taxable income that must be distributed annually. One such restriction is that the Company generally cannot own more than 10% of the voting power or value of the securities of any one issuer unless the issuer is itself a REIT or a taxable REIT subsidiary (“TRS”). In the case of TRSs, the Company’s ownership of securities in all TRSs generally cannot exceed of the value of all of the Company’s assets. FSP Investments LLC and FSP Protective TRS Corp. are the Company’s taxable REIT subsidiaries operating as taxable corporations under the Code. The TRSs have gross amounts of net operating losses (“NOLs”) available to those taxable corporations of million as of December 31, 2023 and December 31, 2022, respectively. The NOLs created prior to 2018 will expire between 2030 and 2047 and the NOLs generated after 2017 will not expire. A valuation allowance is provided for the full amount of the NOLs as the realization of any tax benefits from such NOLs is not assured. Income taxes are recorded based on the future tax effects of the difference between the tax and financial reporting bases of the Company’s assets and liabilities. In estimating future tax consequences, potential future events are considered except for potential changes in income tax law or in rates. The Company adopted an accounting pronouncement related to uncertainty in income taxes effective January 1, 2007, which did not result in recording a liability, nor was any accrued interest and penalties recognized with the adoption. Accrued interest and penalties will be recorded as income tax expense, if the Company records a liability in the future. The Company’s effective tax rate was not affected by the adoption. The Company and one or more of its subsidiaries files income tax returns in the U.S. federal jurisdiction and various state jurisdictions. The statute of limitations for the Company’s income tax returns is generally and as such, the Company’s returns that remain subject to examination would be primarily from 2020 and thereafter. Net operating losses Section 382 of the Code restricts a corporation’s ability to use net operating losses (“NOLs”) to offset future taxable income following certain “ownership changes.” Such ownership changes occurred with past mergers and accordingly a portion of the NOLs incurred by the Company’s prior sponsored REITs available for use by the Company in any particular future taxable year will be limited. To the extent that the Company does not utilize the full amount of the annual NOLs limit, the unused amount may be carried forward to offset taxable income in future years. NOLs expire 20 years after the year in which they arise, and the last of the Company’s NOLs will expire in 2027. Approximately million of NOLs expired in 2023. A valuation allowance is provided for the full amount of the gross NOLs available as the realization of any tax benefits remaining from such NOLs is not assured. The gross amount of NOLs available to the Company was approximately million as of September 30, 2024 and December 31, 2023, respectively. Income Tax Expense The Company is subject to a business tax known as the Revised Texas Franchise Tax. Some of the Company’s leases allow reimbursement by tenants for these amounts because the Revised Texas Franchise Tax replaces a portion of the property tax for school districts. Because the tax base on the Revised Texas Franchise Tax is derived from an income based measure, it is considered an income tax. The Company recorded a provision for the Revised Texas Franchise Tax of The income tax expense reflected in the consolidated statements of operations relates primarily to a franchise tax on the Company’s Texas properties. For the Nine Months Ended September 30, (Dollars in thousands) 2024 2023 Revised Texas Franchise Tax $ 162 $ 212 Other Taxes — — Tax expense $ 162 $ 212 Taxes on income are a current tax expense.

Leases

Leases	9 Months Ended
Leases	Sep. 30, 2024
Leases
Leases	8. Leases Leases as a Lessor: The Company is a lessor of commercial real estate with operations that include the leasing of office and industrial properties. Many of the leases with customers contain options to extend leases at a fair market rate and may also include options to terminate leases. The Company considers several inputs when evaluating the amount it expects to derive from its leased assets at the end of the lease terms, such as the remaining useful life, expected market conditions, fair value of lease payments, expected fair values of underlying assets, and expected deployment of the underlying assets. The Company’s strategy to address its risk for the residual value in its commercial real estate is to re-lease the commercial space. The Company has elected to apply the practical expedient to not separate non-lease components from the related lease component of real estate leases. This combined component is primarily comprised of fixed lease payments, early termination fees, common area maintenance cost reimbursements, and parking lease payments. The Company applies ASC 842-Leases to the combined lease and non-lease components. For the nine months ended September 30, 2024 and 2023, the Company recognized the following amounts of income relating to lease payments: Income relating to lease payments: For the Nine Months Ended September 30, (in thousands) 2024 2023 Income from leases (1) $ 92,937 $ 111,316 $ 92,937 $ 111,316 (1) Includes amounts recognized from variable lease payments of $26,584 and $32,275 for the nine months ended September 30, 2024 and 2023, respectively.

Disposition of Properties and A

Disposition of Properties and Assets Held for Sale	9 Months Ended
Disposition of Properties and Assets Held for Sale	Sep. 30, 2024
Disposition of Properties and Assets Held for Sale
Disposition of Properties and Assets Held for Sale	9. Disposition of Properties and Assets Held for Sale In the three months ended March 31, 2023, the Company sold one office property located in Elk Grove, Illinois on March 10, 2023, for a sales price of $29.1 million, at a gain of approximately $8.4 million. The Company used the proceeds of the disposition principally to repay a portion of outstanding indebtedness. In the three months ended September 30, 2023, the Company sold square feet of land at the Company’s Addison, Texas property to the Town of Addison as part of a road revitalization project. During the three months ended September 30, 2023, the Company entered into an agreement to sell a property in Miami, Florida for a gross sales price of approximately $68.0 million and recorded an impairment loss of $19.2 million. The property was sold on December 6, 2023, at an actual loss of million. During the three months ended September 30, 2023, the Company also entered into an agreement to sell a property in Atlanta, Georgia for a gross sales price of approximately million. This property was classified as held for sale at September 30, 2023 and the Company recorded an impairment loss of million in the three months ended September 30, 2023 based on the fair value less cost to sell, which was less than the carrying value. This agreement was terminated in November 2023. The Company recorded these properties at the fair value less cost to sell, which was less than the carrying value and resulted in an impairment of million in the three months ended September 30, 2023. The reclassification is a non-cash investing activity on the statement of cash flows. The Company estimated the fair value of these properties, less estimated costs to sell, using the offers to purchase the properties made by third parties (Level 3 inputs, as there is no active market). During the three months ended September 30, 2023, the Company entered into an agreement to sell a property in Plano, Texas for a gross sales price of approximately $48.0 million at an expected gain of $10.6 million. The property sold on October 26, 2023 at the expected gain of million. During the three months ended March 31, 2024, the Company sold one office property located in Richardson, Texas on January 26, 2024, for a sales price of $35.0 million at a loss of approximately $2.1 million, which was recorded as an impairment during the year ended December 31, 2023. An additional of costs related to the sale were recorded during the three months ended March 31, 2024. During the three months ended September 30, 2024, the Company entered into a new agreement to sell the property in Atlanta, Georgia for a gross sales price of $34.0 million and recorded an additional impairment loss of $6.6 million based on the fair value less cost to sell. At September 30, 2024 and December 31, 2023, the office property remained classified on the consolidated balance sheet as an asset held for sale in the amount of million of deferred leasing commissions, net of accumulated depreciation. The Company estimated the fair value of these properties, less estimated costs to sell, using the offers to purchase the properties made by third parties (Level 3 inputs, as there is no active market). During the three months ended September 30, 2024, the Company sold a property located in Glen Allen. Virginia for a gross sales price of $31.0 million at a loss of approximately $13.2 million, which had previously been recorded as an impairment as of June 30, 2024. The Company used proceeds of of the net proceeds from the disposition, to repay a portion of its outstanding indebtedness. An additional million in costs related to the sale of properties previously sold was recorded in the three months ended September 30, 2024. The Company reports the results of operations of its properties that have been disposed of or classified as held for sale in its consolidated statements of operations, which includes rental income, rental operating expenses, real estate taxes and insurance and depreciation and amortization. The operating results for the properties that the Company disposed of or classified as assets held for sale are summarized below: Three months ended September 30, Nine months ended September 30, (in thousands) 2024 2023 2024 2023 Rental revenue $ 1,309 $ 7,925 $ 7,001 $ 23,842 Rental operating expenses (643) (2,747) (2,799) (7,673) Real estate taxes and insurance 196 (1,027) (295) (3,292) Depreciation and amortization — (1,895) (832) (7,916) Income from dispositions and assets held for sale $ 862 $ 2,256 $ 3,075 $ 4,961

Subsequent Events

Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2024
Subsequent Events
Subsequent Events	10. Subsequent Events On October 4, 2024, the Board of Directors of the Company declared a cash distribution of $0.01 per share of common stock payable on November 7, 2024, to stockholders of record on October 18, 2024 . On October 23, 2024, the Company sold a property located in Atlanta, Georgia for a gross sales price of $34.0 million at a loss of approximately $27.5 million, which had been substantially recorded as impairments as of September 30, 2024 and September 30, 2023. On October 25, 2024, the Company used proceeds of approximately

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Organization, Properties, Bas_2

Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards (Policies)	9 Months Ended
	Sep. 30, 2024
Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards
Basis of Presentation	Basis of Presentation The unaudited consolidated financial statements of the Company include all of the accounts of the Company and its majority-owned and controlled subsidiaries. All significant intercompany balances and transactions have been eliminated. These financial statements should be read in conjunction with the Company’s consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for its fiscal year ended December 31, 2023, as filed with the Securities and Exchange Commission. The accompanying interim financial statements are unaudited; however, the financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) for interim financial information and in conjunction with the rules and regulations of the Securities and Exchange Commission. Accordingly, they do not include all of the disclosures required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting solely of normal recurring matters) necessary for a fair presentation of the financial statements for these interim periods have been included. Operating results for the three and nine months ended September 30, 2024 are not necessarily indicative of the results that may be expected for the year ending December 31, 2024 or for any other period.
Financial Instruments	Financial Instruments As disclosed in Note 4, the Company’s derivatives were recorded at fair value using Level 2 inputs prior to their termination on February 8, 2023. The Company estimates that the carrying values of cash and cash equivalents, restricted cash, receivables, prepaid expenses, accounts payable and accrued expenses, accrued compensation, and tenant security deposits approximate their fair values based on their short-term maturity and the bank note and term loans payable approximate their fair values as they bear interest at variable interest rates or at rates that are at market for similar investments.
Cash, Cash Equivalents and Restricted Cash	Cash, Cash Equ ivalents and Restricted Cash The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statement of cash flows. September 30, September 30, (in thousands) 2024 2023 Cash and cash equivalents (1) $ 40,861 $ 13,043 Restricted cash 1,514 — Total cash, cash equivalents and restricted cash $ 42,375 $ 13,043 (1) Includes $1,608 and $2,445 at September 30, 2024 and 2023, respectively, pertaining to Monument Circle, which the Company is unable to utilize for its own operational purposes. Restricted cash consists of escrows arising from property sales. Cash held in escrow is paid based on the terms of the closing agreements for the sale.
Variable Interest Entities (VIEs)	Variable Interest Entities (VIEs) The Company determines whether an entity is a VIE and, if so, whether it should be consolidated by utilizing judgments and estimates that are inherently subjective. The determination of whether an entity in which the Company holds a, direct or indirect, variable interest is a VIE is based on several factors, including whether the entity’s total equity investment at risk upon inception is sufficient to finance the entity’s activities without additional subordinated financial support. The Company makes judgments regarding the sufficiency of the equity at risk based first on a qualitative analysis, and then a quantitative analysis, if necessary. The Company analyzes any investments in VIEs to determine if the Company is the primary beneficiary. In evaluating whether the Company is the primary beneficiary, the Company evaluates its direct and indirect economic interests in the entity. Determining which reporting entity, if any, is the primary beneficiary of a VIE is primarily a qualitative approach focused on identifying which reporting entity has both (1) the power to direct the activities of a VIE that most significantly impact such entity’s economic performance and (2) the obligation to absorb losses or the right to receive benefits from such entity that could potentially be significant to such entity. Performance of that analysis requires the exercise of judgment. The Company considers a variety of factors in identifying the entity that holds the power to direct matters that most significantly impact the VIE’s economic performance including, but not limited to, the ability to direct a proposed sale of the property or merger of the company. In addition, the Company considers the rights of other investors to participate in those decisions, to replace the manager and to amend the corporate charter. The Company determines whether it is the primary beneficiary of a VIE at the time it becomes involved with a VIE and considers that conclusion upon a reconsideration event. As of January 1, 2023, the Company’s relationship with the Sponsored REIT was considered a VIE and the Company became the primary beneficiary. Upon this reconsideration event, the entity is included within the Company’s consolidated financial statements and all intercompany accounts and transactions have been eliminated in consolidation. A gain on consolidation of approximately million held by Monument Circle was included in the Company’s cash and cash equivalents upon consolidation and is reflected as “Consolidation of Sponsored REIT” in the consolidated statement of cash flows. The cash and cash equivalents held by Monument Circle are unable to be utilized for the Company’s operational purposes. The creditors of Monument Circle’s trade payables do not have any recourse against the Company. The consolidation value of Monument Circle was allocated to real estate investments and leases, including lease origination costs. Lease origination costs represent the value associated with acquiring an in-place lease (i.e. the market cost to execute a similar lease, including leasing commission, legal, vacancy, and other related costs). The value assigned to building approximates the replacement cost; the value assigned to land approximates its appraised value; and the value assigned to leases approximate their fair value. Other assets and liabilities are recorded at their historical costs, which approximates fair value. The Company assessed the fair value of the acquired real estate leases based on estimated cash flow projections that utilize appropriate discount rates and available market information. Such inputs are Level 3 in the fair value hierarchy. The following table summarizes the estimated fair value of the assets acquired at the date of consolidation, January 1, 2023: (in thousands) Real estate assets $ 19,695 Value of acquired real estate leases 305 Total $ 20,000 The following is quantitative information about significant unobservable inputs in the Company’s Level 3 measurement of the assets acquired in the consolidation of Monument Circle and were measured at fair value on a nonrecurring basis at January 1, 2023: Fair Value (1) at Significant Range Weighted Description January 1, 2023 Valuation Technique Unobservable Input Min Max Average (2) (in thousands) Monument Circle Consolidation $ 20,000 Discounted Cash Flows Exit Cap Rate 7.50 % 7.50 % 7.50 % Discount Rate 9.50 % 9.50 % 9.50 % (1) Classified within Level 3 of the fair value hierarchy. (2) Unobservable inputs were weighted based on the fair value of the related instrument. The relationships and investments related to the Sponsored REIT are summarized in Note 2.
Recent Accounting Standards	Recent Accounting Standards In October 2023, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2023-06, Disclosure Improvements: Codification Amendments in Response to the SEC’s Disclosure Update and Simplification Initiative (“ASU 2023-06”). ASU 2023-06 adds interim and annual disclosure requirements to GAAP at the request of the Securities and Exchange Commission. The guidance in ASU 2023-06 is required to be applied prospectively and the GAAP requirements will be effective when the removal of the related SEC disclosure requirements is effective. If the SEC does not act to remove its related requirements by June 30, 2027, any related FASB amendments will be removed from the Accounting Standards Codification and will not be effective. The Company does not anticipate that the adoption of ASU 2023-06 will have a material impact on the consolidated financial statements. In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (“ASU 2023-07”). ASU 2023-07 requires public entities to disclose significant segment expense and other segment items on an annual and interim basis and to provide in interim periods all disclosures about a reportable segment’s profit or loss and assets that are currently required annually. The guidance in ASU 2023-07 is applied retrospectively to all periods presented in the financial statements and is effective for public entities for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The Company does not anticipate that the adoption of ASU 2023-07 will have a material impact on the consolidated financial statements. In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures (“ASU 2023-09”). ASU 2023-09 enhances the transparency and decision usefulness of income tax disclosures and disclosures about income taxes paid. The guidance in ASU 2023-09 should be applied prospectively but may be applied retrospectively for each period presented. ASU 2023-09 is effective for public entities for fiscal years beginning after December 15, 2024. The Company does not anticipate that the adoption of ASU 2023-09 will have a material impact on the consolidated financial statements.

Organization, Properties, Bas_3

Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards (Tables)	9 Months Ended
	Sep. 30, 2024
Summary of the entity's investment in real estate assets, including number of properties and rentable square feet of real estate	As of September 30, 2024 2023 Owned and Consolidated Properties: Number of properties (1) 16 20 Rentable square feet 5,180,158 6,206,460 (1) Includes one property and three properties that were classified as assets held for sale as of September 30, 2024 and September 30, 2023, respectively.
Reconciliation of cash, cash equivalents, and restricted cash	September 30, September 30, (in thousands) 2024 2023 Cash and cash equivalents (1) $ 40,861 $ 13,043 Restricted cash 1,514 — Total cash, cash equivalents and restricted cash $ 42,375 $ 13,043 (1) Includes $1,608 and $2,445 at September 30, 2024 and 2023, respectively, pertaining to Monument Circle, which the Company is unable to utilize for its own operational purposes.
Fair value of assets acquired at consolidation of VIE	The following table summarizes the estimated fair value of the assets acquired at the date of consolidation, January 1, 2023: (in thousands) Real estate assets $ 19,695 Value of acquired real estate leases 305 Total $ 20,000
Variable interest entities ("VIEs")
Quantitative information about significant unobservable inputs of Level 3 measurement	Fair Value (1) at Significant Range Weighted Description January 1, 2023 Valuation Technique Unobservable Input Min Max Average (2) (in thousands) Monument Circle Consolidation $ 20,000 Discounted Cash Flows Exit Cap Rate 7.50 % 7.50 % 7.50 % Discount Rate 9.50 % 9.50 % 9.50 % (1) Classified within Level 3 of the fair value hierarchy. (2) Unobservable inputs were weighted based on the fair value of the related instrument.

Related Party Transactions an_2

Related Party Transactions and Investments in Non-Consolidated Entities (Tables)	9 Months Ended
	Sep. 30, 2024
Related Party Transactions and Investments in Non-Consolidated Entities
Allowance for credit losses rollforward	For the Nine Months Ended September 30, (In thousands) 2024 2023 Beginning allowance for credit losses $ — $ (4,237) Additional increases to the allowance for credit losses — — Reductions to the allowance for credit losses — 4,237 Ending allowance for credit losses $ — $ —

Financial Instruments_ Deriva_2

Financial Instruments: Derivatives and Hedging (Tables)	9 Months Ended
Financial Instruments: Derivatives and Hedging (Tables)	Sep. 30, 2024
Financial Instruments: Derivatives and Hedging
Summary of interest rate swaps that was recorded in OCI	(in thousands) Nine Months Ended September 30, Interest Rate Swaps in Cash Flow Hedging Relationships: 2024 2023 Amounts of gain recognized in OCI $ — $ 177 Amounts of previously recorded gain (loss) reclassified from OCI into Interest Expense $ 355 $ 2,055 Total amount of Interest Expense presented in the consolidated statements of operations $ 20,513 $ 11,890

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
Stockholders' Equity (Tables)	Sep. 30, 2024
Stockholders' Equity
Schedule of dividends declared and paid	The Company declared and paid dividends as follows (in thousands, except per share amounts): Dividends Per Total Quarter Paid Share Dividends 2024: First quarter of 2024 $ 0.01 $ 1,034 Second quarter of 2024 $ 0.01 $ 1,034 Third quarter of 2024 $ 0.01 $ 1,036 2023: First quarter of 2023 $ 0.01 $ 1,033 Second quarter of 2023 $ 0.01 $ 1,032 Third quarter of 2023 $ 0.01 $ 1,034
Schedule of granted shares under the Plan to non-employee directors with the compensation cost	Shares Available Compensation for Grant Cost Balance December 31, 2022 1,696,687 $ 1,406,250 Shares granted 2023 (194,439) 314,991 Balance December 31, 2023 1,502,248 1,721,241 Shares granted 2024 (136,362) 269,997 Balance September 30, 2024 1,365,886 $ 1,991,238

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
Income Taxes (Tables)	Sep. 30, 2024
Income Taxes
Schedule of income tax expense reflected in the consolidated statements of operations	For the Nine Months Ended September 30, (Dollars in thousands) 2024 2023 Revised Texas Franchise Tax $ 162 $ 212 Other Taxes — — Tax expense $ 162 $ 212

Leases (Tables)

Leases (Tables)	9 Months Ended
Leases (Tables)	Sep. 30, 2024
Leases
Summary of income relating to lease payments	Income relating to lease payments: For the Nine Months Ended September 30, (in thousands) 2024 2023 Income from leases (1) $ 92,937 $ 111,316 $ 92,937 $ 111,316 (1) Includes amounts recognized from variable lease payments of $26,584 and $32,275 for the nine months ended September 30, 2024 and 2023, respectively.

Disposition of Properties and_2

Disposition of Properties and Assets Held for Sale (Tables)	9 Months Ended
Disposition of Properties and Assets Held for Sale (Tables)	Sep. 30, 2024
Disposition of Properties and Assets Held for Sale
Summary of operating results for discontinued operations	Three months ended September 30, Nine months ended September 30, (in thousands) 2024 2023 2024 2023 Rental revenue $ 1,309 $ 7,925 $ 7,001 $ 23,842 Rental operating expenses (643) (2,747) (2,799) (7,673) Real estate taxes and insurance 196 (1,027) (295) (3,292) Depreciation and amortization — (1,895) (832) (7,916) Income from dispositions and assets held for sale $ 862 $ 2,256 $ 3,075 $ 4,961

Organization, Properties, Bas_4

Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards (Details)	9 Months Ended
	Sep. 30, 2024 ft² property	Sep. 30, 2023 ft² property
Properties
Number of properties	15
Number of properties	16	20
Rentable square feet \| ft²	5,180,158	6,206,460
Number of properties classified as assets held for sale	1	3
FSP Investments LLC
Organization
Ownership interest (as a percent)	100%
FSP Property Management LLC
Organization
Ownership interest (as a percent)	100%
FSP Holdings LLC
Organization
Ownership interest (as a percent)	100%
FSP Protective TRS Corp.
Organization
Ownership interest (as a percent)	100%

Organization, Properties, Bas_5

Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards - Cash, Cash Equivalents and Restricted cash (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Cash, Cash Equivalents and Restricted Cash
Cash and cash equivalents	$ 40,861		$ 13,043
Restricted Cash	$ 1,514
Restricted Cash, Statement of Financial Position [Extensible Enumeration]	Total cash, cash equivalents and restricted cash	Total cash, cash equivalents and restricted cash
Total cash, cash equivalents and restricted cash	$ 42,375	$ 127,880	13,043	$ 6,632
FSP Monument Circle LLC
Cash, Cash Equivalents and Restricted Cash
Cash and cash equivalents	$ 1,608		$ 2,445

Organization, Properties, Bas_6

Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards - Variable Interest Entities (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jan. 01, 2023 USD ($)	Dec. 31, 2022 USD ($)
Variable interest entity
Gain on consolidation of Sponsored REIT		$ 394
Cash, cash equivalents and restricted cash		$ 13,043	$ 42,375	$ 127,880		$ 6,632
VIE at Consolidation
Real estate assets			837,349	890,824
Value of acquired real estate leases			4,695	6,694
Variable interest entities ("VIEs")
Variable interest entity
Gain on consolidation of Sponsored REIT	$ 400
Cash, cash equivalents and restricted cash			1,608	2,167
VIE at Consolidation
Real estate assets			19,098	19,354	$ 19,695
Value of acquired real estate leases			$ 67	$ 305	305
Total					20,000
Variable interest entities ("VIEs") \| FSP Monument Circle LLC
Variable interest entity
Cash, cash equivalents and restricted cash	$ 3,000
Variable interest entities ("VIEs") \| Level 3
VIE at Consolidation
Related party mortgage loan receivable					$ 20,000
Debt Securities, Available-for-Sale, Valuation Technique [Extensible Enumeration]					us-gaap:ValuationTechniqueDiscountedCashFlowMember
Variable interest entities ("VIEs") \| Level 3 \| Exit Cap Rate \| Minimum
VIE at Consolidation
Measurement input					7.50
Variable interest entities ("VIEs") \| Level 3 \| Exit Cap Rate \| Maximum
VIE at Consolidation
Measurement input					7.50
Variable interest entities ("VIEs") \| Level 3 \| Exit Cap Rate \| Weighted Average
VIE at Consolidation
Measurement input					7.50
Variable interest entities ("VIEs") \| Level 3 \| Discount Rate \| Minimum
VIE at Consolidation
Measurement input					9.50
Variable interest entities ("VIEs") \| Level 3 \| Discount Rate \| Maximum
VIE at Consolidation
Measurement input					9.50
Variable interest entities ("VIEs") \| Level 3 \| Discount Rate \| Weighted Average
VIE at Consolidation
Measurement input					9.50

Related Party Transactions an_3

Related Party Transactions and Investments in Non-Consolidated Entities - Management fees and interest income from loans (Details) - USD ($)	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Sponsored REITs
Asset management fees, low end of range (as a percent)	1%
Asset management fees, high end of range (as a percent)	5%
Notice period for cancellation of applicable contracts	30 days
Type of revenue	Asset management fees	Asset management fees
Asset management fees
Sponsored REITs
Revenue	$ 0	$ 0

Related Party Transactions an_4

Related Party Transactions and Investments in Non-Consolidated Entities - Sponsored REIT Loans outstanding (Details) - USD ($)	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Oct. 29, 2021	Oct. 28, 2021
Sponsored REITs
Interest income and fees from the Sponsored REIT Loans	$ 0	$ 0
Related party mortgage loan receivable			$ 24,000,000	$ 21,000,000
FSP Monument Circle LLC
Sponsored REITs
Additional loan amount			$ 3,000,000

Related Party Transactions an_5

Related Party Transactions and Investments in Non-Consolidated Entities - Allowance for credit losses (Details) - USD ($)	3 Months Ended	9 Months Ended
	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning allowance for credit losses	$ (4,237,000)	$ 0	$ (4,237,000)
Additional increases to the allowance for credit losses		0	0
Reductions to the allowance for credit losses	$ 4,200,000	0	4,237,000
Ending allowance for credit losses		$ 0	$ 0

Bank Note Payable, Term Loans_2

Bank Note Payable, Term Loans Payable and Senior Notes (Details) - USD ($) $ / shares in Units, $ in Thousands						1 Months Ended	9 Months Ended
	Mar. 31, 2025	Jul. 10, 2024	Feb. 21, 2024	Jan. 31, 2024	Feb. 10, 2023	Feb. 28, 2025	Sep. 30, 2024	Sep. 30, 2023	Mar. 25, 2025	Dec. 31, 2023	Feb. 20, 2019
Bank Note Payable, Term Loans Payable and Senior Notes
Received an aggregate amount								$ 4,206
Bank's base rate
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)			6%
BMO Term loan
Bank Note Payable, Term Loans Payable and Senior Notes
Principal amount of loan							$ 78,800
Interest rate during period (as a percent)							8%
Weighted average interest rate (as a percent)							8.44%			8.11%
Effective interest rate (as a percent)										8.47%
Portion to be retained			10%
Mandatory prepayments of term loan			25.55556%
Threshold period to provide guarantee			90 days
Threshold period to pledge equity interests			90 days
Repayment of loan		$ 7,200	$ 29,000
BMO Term loan \| Minimum
Bank Note Payable, Term Loans Payable and Senior Notes
Fixed charge coverage ratio			1.25	1.50
Unsecured interest charge coverage ratio			1.25	1.75
BMO Term loan \| Maximum
Bank Note Payable, Term Loans Payable and Senior Notes
Restricted maximum quarterly common stock dividend per share					$ 0.01
BMO Term loan \| BMO Interest Rate Swap
Bank Note Payable, Term Loans Payable and Senior Notes
Received an aggregate amount					$ 4,300
Interest receivable portion of proceeds from termination of interest rate swap					$ 100
BMO Term loan \| SOFR
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)			3%	3%		3%
Percentage points of floor rate			5%
BMO Term loan \| SOFR \| Maximum
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)	4%
BMO Term loan \| SOFR \| If aggregate principal amount exceeds $200 million
Bank Note Payable, Term Loans Payable and Senior Notes
Increase in basis spread	1%
BMO Term loan \| One Month SOFR
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)			0.11448%
Term of SOFR			1 month
BMO Term loan \| Three month SOFR
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)			0.26161%
Term of SOFR			3 months
BMO Term loan \| Six month SOFR
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)			0.42826%
Term of SOFR			6 months
BMO Term loan \| LIBOR \| Hedged portion
Bank Note Payable, Term Loans Payable and Senior Notes
Fixed rate (as a percent)											2.39%
BMO Term loan \| Bank's base rate
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)	3%			2%		2%
Percentage points of floor rate			6%
BMO Term loan \| Bank's base rate \| Minimum
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)			2%
BMO Term loan \| BofA Revolver \| Bank's base rate
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)			2%
BMO Term Loan, the BofA Term Loan and the Senior Notes
Bank Note Payable, Term Loans Payable and Senior Notes
Principal amount of loan			$ 200,000
BMO Term Loan, the BofA Term Loan and the Senior Notes \| SOFR
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)						3%
Increase in basis spread	1%
BMO Term Loan, the BofA Term Loan and the Senior Notes \| SOFR \| Maximum
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)	4%
BMO Term Loan, the BofA Term Loan and the Senior Notes \| Bank's base rate
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)	3%					2%
BMO Term Loan, the BofA Term Loan and the Senior Notes \| Bank's base rate \| Maximum
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)	3%
BofA Term Loan
Bank Note Payable, Term Loans Payable and Senior Notes
Principal amount of loan							$ 61,700
Restricted maximum quarterly common stock dividend per share			$ 0.01
Weighted average interest rate (as a percent)							8.44%			8.05%
Effective interest rate (as a percent)							8%			8.47%
Portion to be retained			10%
Mandatory prepayments of term loan			20%
Threshold period to provide guarantee			90 days
Threshold period to pledge equity interests			90 days
Repayment of loan		5,600	$ 22,700
BofA Term Loan \| Minimum
Bank Note Payable, Term Loans Payable and Senior Notes
Fixed charge coverage ratio			1.25	1.50
Unsecured interest charge coverage ratio			1.25	1.75
BofA Term Loan \| SOFR
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)			3%			3%	3%
Percentage points of floor rate			5%
Increase in basis spread	1%
BofA Term Loan \| SOFR \| Maximum
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)	4%
BofA Term Loan \| One Month SOFR
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)			0.11448%
Term of SOFR			1 month
BofA Term Loan \| Three month SOFR
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)			0.26161%
Term of SOFR			3 months
BofA Term Loan \| Six month SOFR
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)			0.42826%
Term of SOFR			6 months
BofA Term Loan \| Bank's base rate
Bank Note Payable, Term Loans Payable and Senior Notes
Basis spread on variable rate (as a percent)			2%
Percentage points of floor rate			6%
Senior notes
Bank Note Payable, Term Loans Payable and Senior Notes
Principal amount of loan							$ 137,100
Restricted maximum quarterly common stock dividend per share			$ 0.01
Interest rate (as a percent)				8%					9%
Increase in basis spread			1%
Portion to be retained			10%
Mandatory prepayments of term loan			44.44444%
Threshold period to provide guarantee			90 days
Threshold period to pledge equity interests			90 days
Series A Notes
Bank Note Payable, Term Loans Payable and Senior Notes
Principal amount of loan							79,500
Borrowings							$ 79,500
Interest rate (as a percent)			8%	4.49%			8%			4.49%
Repayment of loan		7,200	$ 29,200
Series B Notes
Bank Note Payable, Term Loans Payable and Senior Notes
Principal amount of loan							$ 57,600
Borrowings							$ 57,600
Interest rate (as a percent)			8%	4.76%			8%			4.76%
Repayment of loan		$ 5,300	$ 21,200

Financial Instruments_ Deriva_3

Financial Instruments: Derivatives and Hedging (Details) $ in Thousands		9 Months Ended
	Feb. 10, 2023 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 DerivativeInstrument
Financial Instruments: Derivatives and Hedging
Received an aggregate amount		$ 4,206
Number of derivative instruments \| DerivativeInstrument			0
BMO Interest Rate Swap \| BMO Term loan
Financial Instruments: Derivatives and Hedging
Received an aggregate amount	$ 4,300
Interest receivable portion of proceeds from termination of interest rate swap	$ 100

Financial Instruments_ Deriva_4

Financial Instruments: Derivatives and Hedging - Interest Rate Swaps (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financial Instruments: Derivatives and Hedging
Total amount of Interest Expense presented in the consolidated statements of operations	$ 6,585	$ 6,209	$ 20,513	$ 18,099
Interest Rate Swap
Financial Instruments: Derivatives and Hedging
Total amount of Interest Expense presented in the consolidated statements of operations			20,513	11,890
Interest Rate Swap \| Amounts of gain recognized in OCI
Financial Instruments: Derivatives and Hedging
Total amount of Interest Expense presented in the consolidated statements of operations				177
Interest Rate Swap \| Amounts of previously recorded gain (loss) reclassified from OCI into Interest Expense
Financial Instruments: Derivatives and Hedging
Total amount of Interest Expense presented in the consolidated statements of operations			$ 355	$ 2,055

Net Income (Loss) Per Share (De

Net Income (Loss) Per Share (Details) - shares	9 Months Ended
Net Income (Loss) Per Share (Details) - shares	Sep. 30, 2024	Sep. 30, 2023
Net Income (Loss) Per Share
Potential dilutive shares outstanding	0	0

Stockholders' Equity (Details)

Stockholders' Equity (Details)	3 Months Ended						9 Months Ended	12 Months Ended
Stockholders' Equity (Details)	Sep. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) $ / shares	Mar. 31, 2024 USD ($) $ / shares shares	Sep. 30, 2023 USD ($) $ / shares	Jun. 30, 2023 USD ($) $ / shares	Mar. 31, 2023 USD ($) $ / shares shares	Sep. 30, 2024 USD ($) item shares	Dec. 31, 2023 USD ($) shares
Stockholders' Equity
Common stock, shares outstanding (in shares)	103,566,715						103,566,715	103,430,353
Dividends declared and paid
Dividends Per Share (in dollars per share) \| $ / shares	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Total Dividends \| $	$ 1,036,000	$ 1,034,000	$ 1,034,000	$ 1,034,000	$ 1,032,000	$ 1,033,000
2002 Stock Incentive Plan
Equity-Based Compensation
Maximum number of shares provided for grant under equity-based incentive compensation plan	2,000,000						2,000,000
Number of vesting requirements \| item							0
Shares Available for Grant, Beginning			1,502,248			1,696,687	1,502,248	1,696,687
Shares Available for Grant, Shares granted							(136,362)	(194,439)
Shares Available for Grant, Ending	1,365,886						1,365,886	1,502,248
Compensation Cost, Beginning \| $			$ 1,721,241			$ 1,406,250	$ 1,721,241	$ 1,406,250
Compensation cost, Shares granted \| $							269,997	314,991
Compensation Cost, Ending \| $	$ 1,991,238						$ 1,991,238	$ 1,721,241

Income Taxes (Details)

Income Taxes (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
Income Taxes (Details) - USD ($)	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2017	Dec. 31, 2023	Dec. 31, 2022
Income Taxes
Maximum ownership as a percentage of the voting power or value of the securities of each issuer other than REIT or "TRS"			10%
Maximum ownership of securities in all TRS (as a percent)			20%		25%
Maximum ownership of securities in all TRS when considered together with other non-real estate assets (as a percent)			25%
Gross amount of NOL of TRS						$ 4,900,000	$ 4,900,000
Period of statute of limitations applicable to the entity's income tax returns			3 years
Net operating losses
NOLs expiration period			20 years
NOLs expired in the period						700,000
Gross amount of NOLs available to company	$ 29,700,000		$ 29,700,000			$ 29,700,000
Income Tax Expense
Revised Texas Franchise Tax			162,000	$ 212,000
Tax expense	$ 56,000	$ 70,000	162,000	$ 212,000
Deferred income taxes			$ 0

Leases - Income Relating to Lea

Leases - Income Relating to Lease Payments (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Income relating to lease payments:
Income from leases	$ 92,937	$ 111,316
Undiscounted Cash Flows
Variable lease payments	$ 26,584	$ 32,275

Disposition of Properties and_3

Disposition of Properties and Assets Held for Sale (Details)						3 Months Ended			9 Months Ended
	Jan. 26, 2024 USD ($) property	Dec. 06, 2023 USD ($)	Oct. 26, 2023 USD ($)	Aug. 09, 2023 USD ($) property	Mar. 10, 2023 USD ($) property	Sep. 30, 2024 USD ($) ft²	Mar. 31, 2024 USD ($)	Sep. 30, 2023 USD ($) ft²	Sep. 30, 2024 USD ($) ft²	Sep. 30, 2023 USD ($) ft²	Dec. 31, 2023 USD ($)
Dispositions of Property
Assets held for sale						$ 32,926,000			$ 32,926,000		$ 73,318,000
Area of property (in square feet) \| ft²						5,180,158		6,206,460	5,180,158	6,206,460
Operating results for discontinued operations:
Rental revenue						$ 1,309,000		$ 7,925,000	$ 7,001,000	$ 23,842,000
Rental operating expenses						(643,000)		(2,747,000)	(2,799,000)	(7,673,000)
Real estate taxes and insurance						196,000		(1,027,000)	(295,000)	(3,292,000)
Depreciation and amortization								(1,895,000)	(832,000)	(7,916,000)
Income from dispositions and assets held for sale						862,000		2,256,000	3,075,000	4,961,000
Property in Miami, Florida
Dispositions of Property
Expected sales price								68,000,000
Expected loss								19,200,000		19,200,000
Property in Atlanta, Georgia
Dispositions of Property
Sale price						34,000,000
Expected sales price								40,000,000
Expected loss								20,500,000		$ 20,500,000
Increase in expected loss						6,600,000
Assets held for sale						32,900,000			32,900,000		39,000,000
Real estate assets						52,800,000			52,800,000		52,200,000
Straight line rents receivable						4,400,000			$ 4,400,000		$ 2,900,000
Properties in Miami, Florida and Atlanta, Georgia
Dispositions of Property
Impairment charge								39,700,000
Property in Plano, Texas
Dispositions of Property
Sale price								48,000,000
Gain (loss) on sale of property								10,600,000
Disposal group disposed of by sale \| Office Property in Elk Grove Village, Illinois
Dispositions of Property
Number of properties sold \| property					1
Sale price					$ 29,100,000
Gain (loss) on sale of property					$ 8,400,000
Disposal group disposed of by sale \| Office property in Charlotte, North Carolina
Dispositions of Property
Number of properties sold \| property				1
Sale price				$ 9,200,000
Gain (loss) on sale of property				$ (800,000)
Disposal group disposed of by sale \| Property in Addison, Texas
Dispositions of Property
Gain (loss) on sale of property								$ 53,000
Area of property (in square feet) \| ft²								7,826		7,826
Disposal group disposed of by sale \| Property in Miami, Florida
Dispositions of Property
Gain (loss) on sale of property		$ (18,900,000)
Disposal group disposed of by sale \| Property in Plano, Texas
Dispositions of Property
Gain (loss) on sale of property			$ 10,600,000
Disposal group disposed of by sale \| Properties In Richardson, Texas
Dispositions of Property
Number of properties sold \| property	1
Sale price	$ 35,000,000
Gain (loss) on sale of property	$ (2,100,000)
Additional costs related to sale							$ 5,000
Disposal group disposed of by sale \| Property in Glen Allen, Virginia
Dispositions of Property
Sale price						31,000,000
Gain (loss) on sale of property						(13,200,000)
Repayment of outstanding indebtedness						$ 25,300,000
Percentage of proceeds from disposition used for repayment of debt						90%			90%
Additional cost on sale of properties						$ 700,000

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions				3 Months Ended
	Oct. 25, 2024	Oct. 23, 2024	Oct. 04, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023
Subsequent Events
Cash dividend declared per share (in dollars per share)				$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Disposal group disposed of by sale \| Property In Atlanta, Georgia \| Subsequent event
Subsequent Events
Sale price		$ 34
Gain (loss) on sale of property		$ (27.5)
Repayment of outstanding indebtedness	$ 27.4
Percentage of proceeds from disposition used for repayment of debt	90%
O 2024 Q3 Dividends \| Subsequent event
Subsequent Events
Cash dividend declared per share (in dollars per share)			$ 0.01
Dividends, declared date			Oct. 04, 2024
Dividends, payable date			Nov. 07, 2024
Dividends, record date			Oct. 18, 2024