Natural Resource Partners (NRP) 10-Q3 Nov 232023 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, 2023	Oct. 30, 2023
Document Information [Line Items]
Entity Central Index Key	0001171486
Entity Registrant Name	NATURAL RESOURCE PARTNERS LP
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2023
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-31465
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	35-2164875
Entity Address, Address Line One	1415 Louisiana Street, Suite 3325
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77002
City Area Code	713
Local Phone Number	751-7507
Title of 12(b) Security	Common Units representing limited partner interests
Trading Symbol	NRP
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		12,634,642

Consolidated Balance Sheets (Cu

Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 18,411	$ 39,091
Accounts receivable, net	38,569	42,701
Other current assets, net	2,570	1,822
Total current assets	59,550	83,614
Land	24,008	24,008
Mineral rights, net	400,548	412,312
Intangible assets, net	14,014	14,713
Equity in unconsolidated investment	282,491	306,470
Long-term contract receivable, net	26,997	28,946
Other long-term assets, net	7,601	7,068
Total assets	815,209	877,131
Current liabilities
Accounts payable	1,143	1,992
Accrued liabilities	6,511	11,916
Accrued interest	1,224	989
Current portion of deferred revenue	6,399	6,256
Current portion of long-term debt, net	36,780	39,076
Total current liabilities	52,057	60,229
Deferred revenue	35,076	40,181
Long-term debt, net	170,735	129,205
Other non-current liabilities	6,833	5,472
Total liabilities	264,701	235,087
Commitments and contingencies (see Note 13)
Class A Convertible Preferred Units (71,666 and 250,000 units issued and outstanding at September 30, 2023 and December 31, 2022, respectively, at $1,000 par value per unit; liquidation preference of $1,850 per unit at September 30, 2023 and December 31, 2022) (See Note 3)	47,181	164,587
Partners’ capital
Common unitholders’ interest (12,634,642 and 12,505,996 units issued and outstanding at September 30, 2023 and December 31, 2022, respectively)	461,043	404,799
General partner’s interest	7,196	5,977
Warrant holders’ interest	32,843	47,964
Accumulated other comprehensive income	2,245	18,717
Total partners’ capital	503,327	477,457
Total liabilities and partners' capital	$ 815,209	$ 877,131

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Sep. 30, 2023	Dec. 31, 2022
Temporary Equity, shares issued (in shares)	71,666	250,000
Temporary Equity, shares outstanding (in shares)	71,666	250,000
Temporary Equity, par value (in dollars per share)	$ 1,000	$ 1,000
Temporary Equity, liquidation (in dollars per share)	$ 1,850	$ 1,850
Common unitholders interest, issued (in shares)	12,634,642	12,505,996
Common unitholders interest, outstanding (in shares)	12,634,642	12,505,996

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2023		Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues and other income
Equity in earnings of Sisecam Wyoming		$ 12,401		$ 14,556	$ 58,633	$ 44,036
Gain on asset sales and disposals		854		354	955	699
Total revenues and other income		86,367		102,258	276,846	291,907
Operating expenses
Operating and maintenance expenses		8,358		7,898	23,451	25,989
Depreciation, depletion and amortization		4,594		6,850	12,469	16,565
General and administrative expenses		5,669		4,518	17,157	14,037
Asset impairments		63		812	132	874
Total operating expenses		18,684		20,078	53,209	57,465
Income from operations		67,683		82,180	223,637	234,442
Other expenses, net
Interest expense, net		(3,837)		(5,141)	(10,182)	(22,636)
Loss on extinguishment of debt		0		(2,484)	0	(6,532)
Total other expenses, net		(3,837)		(7,625)	(10,182)	(29,168)
Net income		63,846	[1]	74,555	213,455	205,274
Less: income attributable to preferred unitholders		(2,936)		(7,500)	(14,568)	(22,500)
Less: redemption of preferred units		(17,083)		0	(60,929)	0
Net income attributable to common unitholders and the general partner		43,827		67,055	137,958	182,774
Net income attributable to common unitholders		42,951		65,714	135,199	179,119
Net income attributable to the general partner		$ 876		$ 1,341	$ 2,759	$ 3,655
Net income per common unit (see Note 5)
Basic (in dollars per share)		$ 3.4		$ 5.25	$ 10.72	$ 14.36
Diluted (in dollars per share)		$ 2.91		$ 3.71	$ 8.88	$ 10.24
Net income		$ 63,846	[1]	$ 74,555	$ 213,455	$ 205,274
Comprehensive income (loss) from unconsolidated investment and other		2,200		289	(16,472)	(1,179)
Comprehensive income		66,046		74,844	196,983	204,095
Mineral Rights Segment [Member]
Operating expenses
Depreciation, depletion and amortization		4,100		6,400	11,600	15,500
Royalty and Other Mineral Rights [Member] \| Mineral Rights Segment [Member]
Revenues and other income
Revenues		68,533		81,379	205,811	231,795
Transportation and Processing Services [Member] \| Mineral Rights Segment [Member]
Revenues and other income
Revenues	[2]	$ 4,579		$ 5,969	$ 11,447	$ 15,377

[1]Net income includes $2.9 million of income attributable to preferred unitholders that accumulated during the period, of which $2.9 million is allocated to the common unitholders and $0.1 million is allocated to the general partner.[2]Transportation and processing services revenues from contracts with customers as defined under ASC 606 was $3.9 million and $4.9 million for the three months ended September 30, 2023 and 2022, respectively and $9.5 million and $12.9 million for the nine months ended September 30, 2023 and 2022, respectively. The remaining transportation and processing services revenues of $0.6 million and $1.1 million for the three months ended September 30, 2023 and 2022, respectively, and $1.9 million and $2.5 million for the nine months ended September 30, 2023 and 2022, respectively, related to other NRP-owned infrastructure leased to and operated by third-party operators accounted for under other guidance. See Note 15. Financing Transaction for more information.

Consolidated Statements of Part

Consolidated Statements of Partners' Capital (Unaudited) - USD ($) shares in Thousands, $ in Thousands		Total	Limited Partner [Member]	General Partner [Member]	Warrant Holder [Member]	AOCI Attributable to Parent [Member]
Balance (in shares) at Dec. 31, 2021			12,351
Balance at Dec. 31, 2021		$ 256,024	$ 203,062	$ 1,787	$ 47,964	$ 3,211
Net income	[1]	63,899	62,621	1,278	0	0
Distributions to common unitholders and the general partner		(5,672)	(5,559)	(113)
Distributions to preferred unitholders		(7,758)	$ (7,603)	(155)
Issuance of unit-based awards (in shares)			155
Unit-based awards amortization and vesting, net		(1,754)	$ (1,754)
Capital contribution		112		112
Comprehensive income (loss) from unconsolidated investment and other		2,545				2,545
Balance (in shares) at Mar. 31, 2022			12,506
Balance at Mar. 31, 2022		307,396	$ 250,767	2,909	47,964	5,756
Balance (in shares) at Dec. 31, 2021			12,351
Balance at Dec. 31, 2021		256,024	$ 203,062	1,787	47,964	3,211
Net income		205,274
Comprehensive income (loss) from unconsolidated investment and other		(1,179)
Balance (in shares) at Sep. 30, 2022			12,506
Balance at Sep. 30, 2022		413,382	$ 358,332	5,054	47,964	2,032
Balance (in shares) at Mar. 31, 2022			12,506
Balance at Mar. 31, 2022		307,396	$ 250,767	2,909	47,964	5,756
Net income	[1]	66,820	65,484	1,336
Distributions to common unitholders and the general partner		(9,570)	(9,379)	(191)
Distributions to preferred unitholders		(7,500)	(7,350)	(150)
Unit-based awards amortization and vesting, net		1,231	$ 1,231
Comprehensive income (loss) from unconsolidated investment and other		(4,013)				(4,013)
Balance (in shares) at Jun. 30, 2022			12,506
Balance at Jun. 30, 2022		354,364	$ 300,753	3,904	47,964	1,743
Net income		74,555	73,064	1,491
Distributions to common unitholders and the general partner		(9,571)	(9,380)	(191)
Distributions to preferred unitholders		(7,500)	(7,350)	(150)
Unit-based awards amortization and vesting, net		1,245	$ 1,245
Comprehensive income (loss) from unconsolidated investment and other		289				289
Balance (in shares) at Sep. 30, 2022			12,506
Balance at Sep. 30, 2022		413,382	$ 358,332	5,054	47,964	2,032
Balance (in shares) at Dec. 31, 2022			12,506
Balance at Dec. 31, 2022		477,457	$ 404,799	5,977	47,964	18,717
Net income	[2]	79,275	77,690	1,585
Redemption of preferred units		(16,228)	(15,904)	(324)
Distributions to common unitholders and the general partner		(40,900)	(40,082)	(818)
Distributions to preferred unitholders		(8,086)	$ (7,924)	(162)
Issuance of unit-based awards (in shares)			129
Unit-based awards amortization and vesting, net		(1,178)	$ (1,178)
Capital contribution		142		142
Comprehensive income (loss) from unconsolidated investment and other		(19,583)				(19,583)
Balance (in shares) at Mar. 31, 2023			12,635
Balance at Mar. 31, 2023		470,899	$ 417,401	6,400	47,964	(866)
Balance (in shares) at Dec. 31, 2022			12,506
Balance at Dec. 31, 2022		477,457	$ 404,799	5,977	47,964	18,717
Net income		213,455
Comprehensive income (loss) from unconsolidated investment and other		(16,472)
Balance (in shares) at Sep. 30, 2023			12,635
Balance at Sep. 30, 2023		503,327	$ 461,043	7,196	32,843	2,245
Balance (in shares) at Mar. 31, 2023			12,635
Balance at Mar. 31, 2023		470,899	$ 417,401	6,400	47,964	(866)
Net income	[3]	70,334	68,927	1,407
Redemption of preferred units		(27,618)	(27,065)	(553)
Distributions to common unitholders and the general partner		(9,669)	(9,476)	(193)
Distributions to preferred unitholders		(7,396)	(7,248)	(148)
Unit-based awards amortization and vesting, net		2,299	$ 2,299
Comprehensive income (loss) from unconsolidated investment and other		911				911
Balance (in shares) at Jun. 30, 2023			12,635
Balance at Jun. 30, 2023		499,760	$ 444,838	6,913	47,964	45
Net income	[4]	63,846	62,569	1,277
Redemption of preferred units		(17,083)	(16,741)	(342)
Distributions to common unitholders and the general partner		(9,669)	(9,475)	(194)
Distributions to preferred unitholders		(4,437)	(4,349)	(88)
Unit-based awards amortization and vesting, net		2,318	2,318
Comprehensive income (loss) from unconsolidated investment and other		2,200				2,200
Warrant settlement		(33,608)	$ (18,117)	(370)	(15,121)
Balance (in shares) at Sep. 30, 2023			12,635
Balance at Sep. 30, 2023		$ 503,327	$ 461,043	$ 7,196	$ 32,843	$ 2,245

[1]Net income includes $7.5 million of income attributable to preferred unitholders that accumulated during the period, of which $7.4 million is allocated to the common unitholders and $0.2 million is allocated to the general partner.[2]Net income includes $6.7 million of income attributable to preferred unitholders that accumulated during the period, of which $6.5 million is allocated to the common unitholders and $0.1 million is allocated to the general partner.[3]Net income includes $5.0 million of income attributable to preferred unitholders that accumulated during the period, of which $4.9 million is allocated to the common unitholders and $0.1 million is allocated to the general partner.[4]Net income includes $2.9 million of income attributable to preferred unitholders that accumulated during the period, of which $2.9 million is allocated to the common unitholders and $0.1 million is allocated to the general partner.

Consolidated Statements of Pa_2

Consolidated Statements of Partners' Capital (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Allocation to unitholders	$ 2,936	$ 5,000	$ 6,700	$ 7,500	$ 7,500	$ 7,500
Limited Partner [Member]
Allocation to unitholders	2,900	4,900	6,500	7,400	7,400	7,400
General Partner [Member]
Allocation to unitholders	$ 100	$ 100	$ 100	$ 200	$ 200	$ 200

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities
Net income	$ 213,455	$ 205,274
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	12,469	16,565
Distributions from unconsolidated investment	66,140	34,055
Equity earnings from unconsolidated investment	(58,633)	(44,036)
Gain on asset sales and disposals	(955)	(699)
Loss on extinguishment of debt	0	6,532
Asset impairments	132	874
Bad debt expense	813	641
Unit-based compensation expense	7,903	4,216
Amortization of debt issuance costs and other	1,043	1,887
Change in operating assets and liabilities:
Accounts receivable	4,090	(10,118)
Accounts payable	(850)	223
Accrued liabilities	(6,288)	(4,831)
Accrued interest	235	3,014
Deferred revenue	(4,963)	(17,094)
Other items, net	(1,399)	1,447
Net cash provided by operating activities	233,192	197,950
Cash flows from investing activities
Proceeds from asset sales and disposals	961	699
Return of long-term contract receivable	1,830	1,138
Capital expenditures	(10)	(59)
Net cash provided by investing activities	2,781	1,778
Cash flows from financing activities
Debt borrowings	215,034	0
Debt repayments	(176,061)	(197,665)
Redemption of preferred units	(178,334)	0
Redemption of preferred units paid-in-kind	0	(19,321)
Warrant settlement	(33,608)	0
Other items, net	(3,527)	(9,754)
Net cash used in financing activities	(256,653)	(274,311)
Net decrease in cash and cash equivalents	(20,680)	(74,583)
Cash and cash equivalents at beginning of period	39,091	135,520
Cash and cash equivalents at end of period	18,411	60,937
Supplemental cash flow information:
Cash paid for interest	9,484	18,501
Common Unitholders And General Partner [Member]
Cash flows from financing activities
Distributions to unitholders	(60,238)	(24,813)
Preferred Partner [Member]
Cash flows from financing activities
Distributions to unitholders	$ (19,919)	$ (22,758)

Note 1 - Basis of Presentation

Note 1 - Basis of Presentation	9 Months Ended
Note 1 - Basis of Presentation	Sep. 30, 2023
Notes to Financial Statements
Basis of Presentation and Significant Accounting Policies [Text Block]	1. Basis of Presentation Nature of Business Natural Resource Partners L.P. (the "Partnership") engages principally in the business of owning, managing and leasing a diversified portfolio of mineral properties in the United States, including interests in coal and other natural resources and owns a non-controlling 49% interest in Sisecam Wyoming LLC ("Sisecam Wyoming"), a trona ore mining and soda ash production business. The Partnership is organized into two operating segments further described in Note 6. Principles of Consolidation and Reporting The accompanying unaudited Consolidated Financial Statements of the Partnership have been prepared in accordance with generally accepted accounting principles in the United States of America ("GAAP") for interim financial information and with Rule 10 01 X. not December 31, 2022 10 March 3, 2023. no Recently Adopted Accounting Standard On January 1, 2023, 2020 06, 470 20 815 40 2020 06 not Note 5. Note 3.

Note 2 - Revenues From Contract

Note 2 - Revenues From Contracts With Customers	9 Months Ended
Note 2 - Revenues From Contracts With Customers	Sep. 30, 2023
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	2. Revenues from Contracts with Customers The following table presents the Partnership's Mineral Rights segment revenues by major source: For the Three Months Ended September 30, For the Nine Months Ended September 30, (In thousands) 2023 2022 2023 2022 Coal royalty revenues $ 55,544 $ 52,381 $ 161,527 $ 170,775 Production lease minimum revenues 850 1,885 2,025 3,542 Minimum lease straight-line revenues 4,464 4,778 13,414 14,235 Carbon neutral initiative revenues 681 8,600 2,914 8,600 Property tax revenues 1,770 1,360 4,710 4,527 Wheelage revenues 2,385 2,977 9,538 11,073 Coal overriding royalty revenues 827 1,367 1,165 2,307 Lease amendment revenues 623 759 2,322 2,450 Aggregates royalty revenues 736 884 2,175 2,691 Oil and gas royalty revenues 324 6,170 5,126 10,890 Other revenues 329 218 895 705 Royalty and other mineral rights revenues $ 68,533 $ 81,379 $ 205,811 $ 231,795 Transportation and processing services revenues (1) 4,579 5,969 11,447 15,377 Total Mineral Rights segment revenues $ 73,112 $ 87,348 $ 217,258 $ 247,172 ( 1 Transportation and processing services revenues from contracts with customers as defined under ASC 606 three September 30, 2023 2022 nine September 30, 2023 2022, three September 30, 2023 2022 nine September 30, 2023 2022, third Note 15. The following table details the Partnership's Mineral Rights segment receivables and liabilities resulting from contracts with customers: September 30, December 31, (In thousands) 2023 2022 Receivables Accounts receivable, net $ 34,775 $ 39,004 Other current assets, net (1) 2,382 — Other long-term assets, net (2) — 75 Contract liabilities Current portion of deferred revenue $ 6,399 $ 6,256 Deferred revenue 35,076 40,181 ( 1 Other current assets, net includes short-term notes receivables from contracts with customers. ( 2 Other long-term assets, net includes long-term lease amendment fee receivables from contracts with customers. The following table shows the activity related to the Partnership's Mineral Rights segment deferred revenue: For the Nine Months Ended September 30, (In thousands) 2023 2022 Balance at beginning of period (current and non-current) $ 46,437 $ 61,862 Increase due to minimums and lease amendment fees 11,525 11,309 Recognition of previously deferred revenue (16,487 ) (28,403 ) Balance at end of period (current and non-current) $ 41,475 $ 44,768 The Partnership's non-cancelable annual minimum payments due under the lease terms of its coal and aggregates royalty leases are as follows as of September 30, 2023 Lease Term (1) Weighted Average Remaining Years Annual Minimum Payments 0 - 5 years 1.7 $ 19,867 5 - 10 years 4.8 10,417 10+ years 12.0 27,129 Total 7.2 $ 57,413 ( 1 Lease term does not

Note 3 - Class A Convertible Pr

Note 3 - Class A Convertible Preferred Units and Warrants	9 Months Ended
Note 3 - Class A Convertible Preferred Units and Warrants	Sep. 30, 2023
Notes to Financial Statements
Preferred Stock [Text Block]	3. On March 2, 2017, one may NRP also issued two may eighth may, After March 2, 2022 March 2, 2025, may 12 30 30 On or after March 2, 2025, may 30 1 March 2, 2020, March 2, 2020 March 2, 2021, March 2, 2021, 2 To the extent the holders of the preferred units have not March 2, 2029, 30 In addition, NRP has the ability to redeem at any time (subject to compliance with its debt agreements) all or any portion of the preferred units and any outstanding PIK units for cash. The redemption price for each outstanding PIK unit is $1,000 plus the value of any accrued and unpaid distributions per PIK unit. The redemption price for each preferred unit is the liquidation value divided by the number of outstanding preferred units. The preferred units are redeemable at the option of the preferred purchasers only upon a change in control. The terms of the preferred units contain certain restrictions on NRP's ability to pay distributions on its common units. To the extent that either (i) NRP's consolidated Leverage Ratio, as defined in the Partnership's Fifth Amended and Restated Partnership Agreement dated March 2, 2017 ( 3.25x, 1.2x four may not January 1, 2022, may not The holders of the preferred units have the right to vote with holders of NRP’s common units on an as-converted basis and have other customary approval rights with respect to changes of the terms of the preferred units. In addition, Blackstone has certain approval rights over certain matters as identified in the restated partnership agreement. GoldenTree also has more limited approval rights that will expand once Blackstone's ownership goes below the minimum preferred unit threshold (as defined below). These approval rights are not no not At the closing, pursuant to the Board Representation and Observation Rights Agreement, the Preferred Purchasers received certain board appointment and observation rights, and Blackstone appointed one one NRP also entered into a registration rights agreement (the "preferred unit and warrant registration rights agreement") with the preferred purchasers, pursuant to which NRP is required to file (i) a shelf registration statement to register the common units issuable upon exercise of the warrants and to cause such registration statement to become effective not 90 not fifth 90 first April 20, 2017. not Accounting for the Preferred Units and Warrants Classification The preferred units are accounted for as temporary equity on NRP's Consolidated Balance Sheets due to certain contingent redemption rights that may Initial Measurement The net transaction price was allocated to the preferred units and warrants based on their relative fair values at inception date. NRP allocated the transaction issuance costs to the preferred units and warrants primarily on a pro-rata basis based on their relative inception date allocated values. Subsequent Measurement Preferred Units Subsequent adjustment of the preferred units will not first In February 2023, May 2023, June 2023, August 2023, September 2023, September 30, 2023. no Activity related to the preferred units is as follows: Units Financial (In thousands, except unit data) Outstanding Position Balance at December 31, 2021 269,321 $ 183,908 Redemption of preferred units paid-in-kind (19,321 ) (19,321 ) Balance at December 31, 2022 250,000 $ 164,587 Redemption of preferred units (178,334 ) (117,406 ) Balance at September 30, 2023 71,666 $ 47,181 Warrants Subsequent adjustment of the warrants will not may, On September 18, 2023 ( September 30, 2023 no December 31, 2022 3.0 0.75 $22.81 2.25 $34.00. September 30, 2023 $48.0 December 31, 2022. Activity related to the warrants is as follows: Warrants Financial (In thousands, except warrant data) Outstanding Position Balance at December 31, 2021 and 2022 3,002,500 $ 47,964 Warrant settlement (812,500 ) (15,121 ) Balance at September 30, 2023 2,190,000 $ 32,843 Embedded Features Certain embedded features within the preferred unit and warrant purchase agreement are accounted for at fair value and are remeasured each quarter. See Note 10.

Note 4 - Common and Preferred U

Note 4 - Common and Preferred Unit Distributions	9 Months Ended
Note 4 - Common and Preferred Unit Distributions	Sep. 30, 2023
Notes to Financial Statements
Partners' Capital Notes Disclosure [Text Block]	4. Common and Preferred Unit Distributions The Partnership makes cash distributions to common and preferred unitholders on a quarterly basis, subject to approval by the Board of Directors of GP Natural Resource Partners LLC (the "Board of Directors"). NRP recognizes both common unit and preferred unit distributions on the date the distribution is declared. Distributions made on the common units and the general partner's general partner ("GP") interest are made on a pro-rata basis in accordance with their relative percentage interests in the Partnership. The general partner is entitled to receive 2% of such distributions. Income available to common unitholders and the general partner is reduced by preferred unit distributions that accumulated during the period. NRP reduced net income available to common unitholders and the general partner by $2.9 million and $7.5 million during the three September 30, 2023 2022 nine September 30, 2023 2022, three March 31, 2023, February 2023 February. three June 30, 2023, May 2023 June 2023 three September 30, 2023, August 2023 September 2023 three nine September 30, 2023, The following table shows the cash distributions declared and paid to common and preferred unitholders during the nine September 30, 2023 2022 Common Units Preferred Units Month Paid Period Covered by Distribution Distribution per Unit Total Distribution (1) (In thousands) Distribution per Unit Total Distribution (In thousands) 2023 February October 1 - December 31, 2022 $ 0.75 $ 9,571 $ 30.00 $ 7,500 February (2) January 1 - February 8, 2023 — — 12.33 586 March (3) Special Distribution 2.43 31,329 — — May January 1 - March 31, 2023 0.75 9,669 30.00 6,075 May (4) April 1 - May 5, 2023 — — 11.33 406 June (5) April 1 - June 2, 2023 — — 20.33 915 August April 1 - June 30, 2023 0.75 9,669 30.00 3,650 August (6) June 30 - August 8, 2023 — — 12.33 432 September (7) June 30 - September 12, 2023 — — 23.67 355 2022 February October 1 - December 31, 2021 $ 0.45 $ 5,672 $ 30.00 $ 7,500 February (8) January 1 - February 8, 2022 — — 13.35 258 May January 1 - March 31, 2022 0.75 9,570 30.00 7,500 August April 1 - June 30, 2022 0.75 9,571 30.00 7,500 ( 1 Totals include the amount paid to NRP's general partner in accordance with the general partner's 2% ( 2 Relates to accrued distribution paid upon the redemption of 47,499 preferred units in February 2023. ( 3 Special distribution was made to help cover unitholder tax liabilities associated with owning NRP's common units during 2022. ( 4 Relates to accrued distribution paid upon the redemption of 35,834 preferred units in May 2023. ( 5 Relates to accrued distribution paid upon the redemption of 45,000 preferred units in June 2023. ( 6 Relates to accrued distribution paid upon the redemption of 35,000 preferred units in August 2023. ( 7 Relates to accrued distribution paid upon the redemption of 15,001 preferred units in September 2023. ( 8 Relates to accrued distribution paid upon the redemption of 19,321 preferred units paid-in-kind in February 2022.

Note 5 - Net Income Per Common

Note 5 - Net Income Per Common Unit	9 Months Ended
Note 5 - Net Income Per Common Unit	Sep. 30, 2023
Notes to Financial Statements
Earnings Per Share [Text Block]	5. Net Income Per Common Unit Basic net income per common unit is computed by dividing net income, after considering income attributable to preferred unitholders, the difference between the fair value of the consideration paid upon redemption and the carrying value of the preferred units and the general partner’s general partner interest, by the weighted average number of common units outstanding. Diluted net income per common unit includes the effect of NRP's preferred units, warrants, and unvested unit-based awards if the inclusion of these items is dilutive. The dilutive effect of the preferred units is calculated using the if-converted method. Under the if-converted method, the preferred units are assumed to be converted at the beginning of the period, and the resulting common units are included in the denominator of the diluted net income per unit calculation for the period being presented. Distributions declared in the period and undeclared distributions on the preferred units that accumulated during the period are added back to the numerator for purposes of the if-converted calculation. The calculation of diluted net income per common unit for the three nine September 30, 2023 not three nine September 30, 2023 three nine September 30, 2022 The dilutive effect of the warrants is calculated using the treasury stock method, which assumes that the proceeds from the exercise of these instruments are used to purchase common units at the average market price for the period. The calculation of diluted net income per common unit for the three nine September 30, 2023 three nine September 30, 2022 net 0.75 $22.81 2.25 $34.00 The following table reconciles the numerator and denominator of the basic and diluted net income per common unit computations and calculates basic and diluted net income per common unit: For the Three Months Ended September 30, For the Nine Months Ended September 30, (In thousands, except per unit data) 2023 2022 2023 2022 Basic net income per common unit Net income attributable to common unitholders $ 42,951 $ 65,714 $ 135,199 $ 179,119 Weighted average common units—basic 12,635 12,506 12,613 12,476 Basic net income per common unit $ 3.40 $ 5.25 $ 10.72 $ 14.36 Diluted net income per common unit Weighted average common units—basic 12,635 12,506 12,613 12,476 Plus: dilutive effect of preferred units 1,104 6,210 2,434 6,210 Plus: dilutive effect of warrants 1,492 807 1,296 759 Plus: dilutive effect of unvested unit-based awards 240 195 190 204 Weighted average common units—diluted 15,471 19,718 16,533 19,649 Net income $ 63,846 $ 74,555 $ 213,455 $ 205,274 Less: income attributable to preferred unitholders (786 ) — (2,693 ) — Less: redemption of preferred units (17,083 ) — (60,929 ) — Diluted net income attributable to common unitholders and the general partner $ 45,977 $ 74,555 $ 149,833 $ 205,274 Less: diluted net income attributable to the general partner (920 ) (1,491 ) (2,997 ) (4,105 ) Diluted net income attributable to common unitholders $ 45,057 $ 73,064 $ 146,836 $ 201,169 Diluted net income per common unit $ 2.91 $ 3.71 $ 8.88 $ 10.24

Note 6 - Segment Information

Note 6 - Segment Information	9 Months Ended
Note 6 - Segment Information	Sep. 30, 2023
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	6. Segment Information The Partnership's segments are strategic business units that offer distinct products and services to different customers in different geographies within the U.S. and that are managed accordingly. NRP has the following two operating segments: Mineral Rights Soda Ash Direct segment costs and certain other costs incurred at the corporate level that are identifiable and that benefit the Partnership's segments are allocated to the operating segments accordingly. These allocated costs generally include salaries and benefits, insurance, property taxes, legal, royalty, information technology and shared facilities services and are included in operating and maintenance expenses on the Partnership's Consolidated Statements of Comprehensive Income. Corporate and Financing includes functional corporate departments that do not not The following table summarizes certain financial information for each of the Partnership's business segments: Operating Segments (In thousands) Mineral Rights Soda Ash Corporate and Financing Total For the Three Months Ended September 30, 2023 Revenues $ 73,112 $ 12,401 $ — $ 85,513 Gain on asset sales and disposals 854 — — 854 Operating and maintenance expenses 8,305 53 — 8,358 Depreciation, depletion and amortization 4,589 — 5 4,594 General and administrative expenses — — 5,669 5,669 Asset impairments 63 — — 63 Other expenses, net — — 3,837 3,837 Net income (loss) 61,009 12,348 (9,511 ) 63,846 For the Three Months Ended September 30, 2022 Revenues $ 87,348 $ 14,556 $ — $ 101,904 Gain on asset sales and disposals 354 — — 354 Operating and maintenance expenses 7,867 31 — 7,898 Depreciation, depletion and amortization 6,850 — — 6,850 General and administrative expenses — — 4,518 4,518 Asset impairments 812 — — 812 Other expenses, net — — 7,625 7,625 Net income (loss) 72,173 14,525 (12,143 ) 74,555 For the Nine Months Ended September 30, 2023 Revenues $ 217,258 $ 58,633 $ — $ 275,891 Gain on asset sales and disposals 955 — — 955 Operating and maintenance expenses 23,226 225 — 23,451 Depreciation, depletion and amortization 12,455 — 14 12,469 General and administrative expenses — — 17,157 17,157 Asset impairments 132 — — 132 Other expenses, net — — 10,182 10,182 Net income (loss) 182,400 58,408 (27,353 ) 213,455 For the Nine Months Ended September 30, 2022 Revenues $ 247,172 $ 44,036 $ — $ 291,208 Gain on asset sales and disposals 699 — — 699 Operating and maintenance expenses 25,884 105 — 25,989 Depreciation, depletion and amortization 16,565 — — 16,565 General and administrative expenses — — 14,037 14,037 Asset impairments 874 — — 874 Other expenses, net — — 29,168 29,168 Net income (loss) 204,548 43,931 (43,205 ) 205,274

Note 7 - Equity Investment

Note 7 - Equity Investment	9 Months Ended
Note 7 - Equity Investment	Sep. 30, 2023
Notes to Financial Statements
Equity Method Investments and Joint Ventures Disclosure [Text Block]	7. Equity Investment The Partnership accounts for its 49% investment in Sisecam Wyoming using the equity method of accounting. Activity related to this investment is as follows: For the Three Months Ended September 30, For the Nine Months Ended September 30, (In thousands) 2023 2022 2023 2022 Balance at beginning of period $ 290,900 $ 280,300 $ 306,470 $ 276,004 Income allocation to NRP’s equity interests (1) 13,608 15,732 62,184 47,601 Amortization of basis difference (1,207 ) (1,176 ) (3,551 ) (3,565 ) Other comprehensive income (loss) 2,200 289 (16,472 ) (1,179 ) Distribution (23,010 ) (10,339 ) (66,140 ) (34,055 ) Balance at end of period $ 282,491 $ 284,806 $ 282,491 $ 284,806 ( 1 Amounts reclassified into income out of accumulated other comprehensive loss were $0.9 million and $(1.2) million for the three September 30, 2023 2022, nine September 30, 2023 2022, The following table represents summarized financial information for Sisecam Wyoming as derived from their respective unaudited financial statements for the three nine September 30, 2023 2022 For the Three Months Ended September 30, For the Nine Months Ended September 30, (In thousands) 2023 2022 2023 2022 Net sales $ 180,232 $ 190,450 $ 588,725 $ 542,955 Gross profit 34,454 39,679 148,063 119,723 Net income 27,772 32,105 126,906 97,144

Note 8 - Mineral Rights, Net

Note 8 - Mineral Rights, Net	9 Months Ended
Note 8 - Mineral Rights, Net	Sep. 30, 2023
Notes to Financial Statements
Mineral Industries Disclosures [Text Block]	8. Mineral Rights, Net The Partnership’s mineral rights consist of the following: September 30, 2023 December 31, 2022 (In thousands) Carrying Value Accumulated Depletion Net Book Value Carrying Value Accumulated Depletion Net Book Value Coal properties $ 661,680 $ (279,988 ) $ 381,692 $ 661,812 $ (269,037 ) $ 392,775 Aggregates properties 8,655 (3,723 ) 4,932 8,655 (3,410 ) 5,245 Oil and gas royalty properties 12,354 (9,962 ) 2,392 12,354 (9,600 ) 2,754 Other 13,144 (1,612 ) 11,532 13,150 (1,612 ) 11,538 Total mineral rights, net $ 695,833 $ (295,285 ) $ 400,548 $ 695,971 $ (283,659 ) $ 412,312 Depletion expense related to the Partnership’s mineral rights is included in depreciation, depletion and amortization on its Consolidated Statements of Comprehensive Income and totaled $4.1 million and $6.4 million for the three September 30, 2023 2022, nine September 30, 2023 2022, The Partnership has developed procedures to evaluate its long-lived assets for possible impairment periodically or whenever events or changes in circumstances indicate an asset's net book value may not not three nine September 30, 2023 September 30, 2022.

Note 9 - Debt, Net

Note 9 - Debt, Net	9 Months Ended
Note 9 - Debt, Net	Sep. 30, 2023
Notes to Financial Statements
Debt Disclosure [Text Block]	9. Debt, Net The Partnership's debt consists of the following: September 30, December 31, (In thousands) 2023 2022 Opco Credit Facility $ 128,034 $ 70,000 Opco Senior Notes 5.55 $ — $ 2,366 4.73 6,004 6,004 5.82 12,684 25,368 8.92 4,011 8,023 5.03 45,683 45,683 5.18 11,643 11,643 Total Opco Senior Notes $ 80,025 $ 99,087 Total debt at face value $ 208,059 $ 169,087 Net unamortized debt issuance costs (544 ) (806 ) Total debt, net $ 207,515 $ 168,281 Less: current portion of long-term debt (36,780 ) (39,076 ) Total long-term debt, net $ 170,735 $ 129,205 Opco Debt All of Opco’s debt is guaranteed by its wholly owned subsidiaries and is secured by certain of the assets of Opco and its wholly owned subsidiaries, other than BRP LLC and NRP Trona LLC. As of September 30, 2023 December 31, 2022 Opco Credit Facility In May 2023, August 2027. • A leverage ratio of consolidated indebtedness to EBITDDA (in each case as defined in the Opco Credit Facility) not 3.0x; • an interest coverage ratio of consolidated EBITDDA to the sum of consolidated interest expense and consolidated lease expense (in each case as defined in the Opco Credit Facility) of not 1.0. As of December 31, 2022, nine September 30, 2023, September 30, 2023. three nine September 30, 2023 three nine September 30, 2022, not September 30, 2023 December 31, 2022, The Opco Credit Facility is collateralized and secured by liens on certain of Opco’s assets with carrying values of $321.6 million and $326.4 million classified as mineral rights, net and other long-term assets, net and $27.0 million and $28.9 million classified as long-term contract receivable, net on the Partnership’s Consolidated Balance Sheets as of September 30, 2023 December 31, 2022 Opco Senior Notes Opco has issued several series of private placement senior notes (the "Opco Senior Notes") with various interest rates and principal due dates. As of September 30, 2023 December 31, 2022 nine September 30, 2023 2022 The 8.92% Opco Senior Notes also provides that in the event that Opco’s leverage ratio of consolidated indebtedness to consolidated EBITDDA (as defined in the Note Purchase Agreements) exceeds 3.75 to 1.00 two 3.75 1.00. not 1.00 September 30, 2023

Note 10 - Fair Value Measuremen

Note 10 - Fair Value Measurements	9 Months Ended
Note 10 - Fair Value Measurements	Sep. 30, 2023
Notes to Financial Statements
Fair Value Disclosures [Text Block]	10. Fair Value Measurements Fair Value of Financial Assets and Liabilities The Partnership’s financial assets and liabilities consist of cash and cash equivalents, a contract receivable and debt. The carrying amounts reported on the Consolidated Balance Sheets for cash and cash equivalents approximate fair value due to their short-term nature. The Partnership uses available market data and valuation methodologies to estimate the fair value of its debt and contract receivable. The following table shows the carrying value and estimated fair value of the Partnership's debt and contract receivable: September 30, 2023 December 31, 2022 Fair Value Carrying Estimated Carrying Estimated ( In thousands Hierarchy Level Value Fair Value Value Fair Value Debt: Opco Senior Notes (1) 3 $ 79,481 $ 75,815 $ 98,281 $ 96,060 Opco Credit Facility (2) 3 128,034 128,034 70,000 70,000 Assets: Contract receivable, net (current and long-term) (3) 3 $ 29,570 $ 24,880 $ 31,371 $ 24,833 ( 1 The fair value of the Opco Senior Notes at September 30, 2023 December 31, 2022 September 30, 2023 December 31, 2022, ( 2 The fair value of the Opco Credit Facility approximates the outstanding borrowing amount because the interest rates are variable and reflective of market rates and the terms of the credit facility allow the Partnership to repay the debt at any time without penalty. ( 3 The fair value of the Partnership's contract receivable is determined based on the present value of future cash flow projections related to the underlying asset at a discount rate of 15% at September 30, 2023 December 31, 2022 NRP has embedded derivatives in the preferred units related to certain conversion options, redemption features and the change of control provision that are accounted for separately from the preferred units as assets and liabilities at fair value on the Partnership's Consolidated Balance Sheets. Level 3 September 30, 2023 December 31, 2022

Note 11 - Related Party Transac

Note 11 - Related Party Transactions	9 Months Ended
Note 11 - Related Party Transactions	Sep. 30, 2023
Notes to Financial Statements
Related Party Transactions Disclosure [Text Block]	11. Related Party Transactions Affiliates of our General Partner The Partnership’s general partner does not Direct general and administrative expenses charged to the Partnership by QMC, WPPLP and QID are included on the Partnership's Consolidated Statement of Comprehensive Income as follows: For the Three Months Ended September 30, For the Nine Months Ended September 30, (In thousands) 2023 2022 2023 2022 Operating and maintenance expenses $ 1,663 $ 1,687 $ 5,094 $ 5,044 General and administrative expenses 1,287 1,195 3,860 3,660 The Partnership had accounts payable to QMC of $0.4 million on its Consolidated Balance Sheets at both September 30, 2023 December 31, 2022 September 30, 2023 December 31, 2022 During the three September 30, 2023 2022 nine September 30, 2023 2022,

Note 12 - Major Customers

Note 12 - Major Customers	9 Months Ended
Note 12 - Major Customers	Sep. 30, 2023
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	12. Major Customers Revenues from customers that exceeded 10 For the Three Months Ended September 30, For the Nine Months Ended September 30, 2023 2022 2023 2022 (In thousands) Revenues Percent Revenues Percent Revenues Percent Revenues Percent Alpha Metallurgical Resources, Inc. (1) $ 17,219 20 % $ 21,000 21 % $ 61,122 22 % $ 81,638 28 % Foresight Energy Resources LLC ("Foresight") (1) $ 18,600 22 % $ 19,334 19 % $ 43,453 16 % $ 47,081 16 % ( 1 Revenues from Alpha Metallurgical Resources, Inc. and Foresight are included within the Partnership's Mineral Rights segment.

Note 13 - Commitments and Conti

Note 13 - Commitments and Contingencies	9 Months Ended
Note 13 - Commitments and Contingencies	Sep. 30, 2023
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	13. Commitments and Contingencies NRP is involved, from time to time, in various legal proceedings arising in the ordinary course of business. While the ultimate results of these proceedings cannot be predicted with certainty, Partnership management believes these ordinary course matters will not

Note 14 - Unit-Based Compensati

Note 14 - Unit-Based Compensation	9 Months Ended
Note 14 - Unit-Based Compensation	Sep. 30, 2023
Notes to Financial Statements
Share-Based Payment Arrangement [Text Block]	14. Unit-Based Compensation During the nine September 30, 2023, 2017 nine September 30, 2022, nine September 30, 2023 2022 three September 30, 2023 2022, nine September 30, 2023 2022, September 30, 2023 December 31, 2022 A summary of the unit activity in the outstanding grants during 2023 (In thousands) Common Units Weighted Average Grant Date Fair Value per Common Unit Outstanding at January 1, 2023 386 $ 28.96 Granted 281 $ 56.84 Fully vested and issued (184 ) $ 26.30 Outstanding at September 30, 2023 483 $ 46.21

Note 15 - Financing Transaction

Note 15 - Financing Transaction	9 Months Ended
Note 15 - Financing Transaction	Sep. 30, 2023
Notes to Financial Statements
Financing Receivables [Text Block]	15. Financing Transaction The Partnership owns rail loadout and associated infrastructure at the Sugar Camp mine in the Illinois Basin operated by a subsidiary of Foresight. The infrastructure at the Sugar Camp mine is leased to a subsidiary of Foresight and is accounted for as a financing transaction (the "Sugar Camp lease"). The Sugar Camp lease expires in 2032 2032, ten thousand

Note 16 - Credit Losses

Note 16 - Credit Losses	9 Months Ended
Note 16 - Credit Losses	Sep. 30, 2023
Notes to Financial Statements
Credit Loss, Financial Instrument [Text Block]	16. Credit Losses The Partnership is exposed to credit losses through collection of its short-term trade receivables resulting from contracts with customers and a long-term receivable resulting from a financing transaction with a customer. The Partnership records an allowance for current expected credit losses on these receivables based on the loss-rate method. NRP assessed the likelihood of collection of its receivables utilizing historical loss rates, current market conditions, industry and macroeconomic factors, reasonable and supportable forecasts and facts or circumstances of individual customers and properties. Examples of these facts or circumstances include, but are not As of September 30, 2023 December 31, 2022 September 30, 2023 December 31, 2022 (In thousands) Gross CECL Allowance Net Gross CECL Allowance Net Receivables $ 46,294 $ (5,343 ) $ 40,951 $ 47,237 $ (4,461 ) $ 42,776 Long-term contract receivable 27,965 (968 ) 26,997 29,984 (1,038 ) 28,946 Total $ 74,259 $ (6,311 ) $ 67,948 $ 77,221 $ (5,499 ) $ 71,722 NRP recorded $1.6 million and $0.0 million of operating and maintenance expenses on its Consolidated Statements of Comprehensive Income related to the change in the CECL allowance during the three September 30, 2023 2022, nine September 30, 2023 2022, NRP has procedures in place to monitor its ongoing credit exposure through timely review of counterparty balances against contract terms and due dates, account and financing receivable reconciliation, bankruptcy monitoring, lessee audits and dispute resolution. The Partnership may

Note 17 - Subsequent Events

Note 17 - Subsequent Events	9 Months Ended
Note 17 - Subsequent Events	Sep. 30, 2023
Notes to Financial Statements
Subsequent Events [Text Block]	17. Subsequent Events The following represents material events that have occurred subsequent to September 30, 2023 10 Common Unit and Preferred Unit Distributions In November 2023, third 2023 third 2023 Warrant Repurchases On October 6, 2023, October 26, 2023, October 2023.

Insider Trading Arrangements

Insider Trading Arrangements	9 Months Ended
Insider Trading Arrangements	Sep. 30, 2023
Insider Trading Arr Line Items
Material Terms of Trading Arrangement [Text Block]	5. None.
Rule 10b5-1 Arrangement Adopted [Flag]	false
Non-Rule 10b5-1 Arrangement Adopted [Flag]	false
Rule 10b5-1 Arrangement Terminated [Flag]	false
Non-Rule 10b5-1 Arrangement Terminated [Flag]	false

Note 2 - Revenues From Contra_2

Note 2 - Revenues From Contracts With Customers (Tables)	9 Months Ended
Note 2 - Revenues From Contracts With Customers (Tables)	Sep. 30, 2023
Notes Tables
Disaggregation of Revenue [Table Text Block]	For the Three Months Ended September 30, For the Nine Months Ended September 30, (In thousands) 2023 2022 2023 2022 Coal royalty revenues $ 55,544 $ 52,381 $ 161,527 $ 170,775 Production lease minimum revenues 850 1,885 2,025 3,542 Minimum lease straight-line revenues 4,464 4,778 13,414 14,235 Carbon neutral initiative revenues 681 8,600 2,914 8,600 Property tax revenues 1,770 1,360 4,710 4,527 Wheelage revenues 2,385 2,977 9,538 11,073 Coal overriding royalty revenues 827 1,367 1,165 2,307 Lease amendment revenues 623 759 2,322 2,450 Aggregates royalty revenues 736 884 2,175 2,691 Oil and gas royalty revenues 324 6,170 5,126 10,890 Other revenues 329 218 895 705 Royalty and other mineral rights revenues $ 68,533 $ 81,379 $ 205,811 $ 231,795 Transportation and processing services revenues (1) 4,579 5,969 11,447 15,377 Total Mineral Rights segment revenues $ 73,112 $ 87,348 $ 217,258 $ 247,172
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]	September 30, December 31, (In thousands) 2023 2022 Receivables Accounts receivable, net $ 34,775 $ 39,004 Other current assets, net (1) 2,382 — Other long-term assets, net (2) — 75 Contract liabilities Current portion of deferred revenue $ 6,399 $ 6,256 Deferred revenue 35,076 40,181 For the Nine Months Ended September 30, (In thousands) 2023 2022 Balance at beginning of period (current and non-current) $ 46,437 $ 61,862 Increase due to minimums and lease amendment fees 11,525 11,309 Recognition of previously deferred revenue (16,487 ) (28,403 ) Balance at end of period (current and non-current) $ 41,475 $ 44,768
Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block]	Lease Term (1) Weighted Average Remaining Years Annual Minimum Payments 0 - 5 years 1.7 $ 19,867 5 - 10 years 4.8 10,417 10+ years 12.0 27,129 Total 7.2 $ 57,413

Note 3 - Class A Convertible _2

Note 3 - Class A Convertible Preferred Units and Warrants (Tables)	9 Months Ended
	Sep. 30, 2023
Notes Tables
Schedule of Preferred Units [Table Text Block]	Units Financial (In thousands, except unit data) Outstanding Position Balance at December 31, 2021 269,321 $ 183,908 Redemption of preferred units paid-in-kind (19,321 ) (19,321 ) Balance at December 31, 2022 250,000 $ 164,587 Redemption of preferred units (178,334 ) (117,406 ) Balance at September 30, 2023 71,666 $ 47,181
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]	Warrants Financial (In thousands, except warrant data) Outstanding Position Balance at December 31, 2021 and 2022 3,002,500 $ 47,964 Warrant settlement (812,500 ) (15,121 ) Balance at September 30, 2023 2,190,000 $ 32,843

Note 4 - Common and Preferred_2

Note 4 - Common and Preferred Unit Distributions (Tables)	9 Months Ended
Note 4 - Common and Preferred Unit Distributions (Tables)	Sep. 30, 2023
Notes Tables
Distributions Made to Limited Partner, by Distribution [Table Text Block]	Common Units Preferred Units Month Paid Period Covered by Distribution Distribution per Unit Total Distribution (1) (In thousands) Distribution per Unit Total Distribution (In thousands) 2023 February October 1 - December 31, 2022 $ 0.75 $ 9,571 $ 30.00 $ 7,500 February (2) January 1 - February 8, 2023 — — 12.33 586 March (3) Special Distribution 2.43 31,329 — — May January 1 - March 31, 2023 0.75 9,669 30.00 6,075 May (4) April 1 - May 5, 2023 — — 11.33 406 June (5) April 1 - June 2, 2023 — — 20.33 915 August April 1 - June 30, 2023 0.75 9,669 30.00 3,650 August (6) June 30 - August 8, 2023 — — 12.33 432 September (7) June 30 - September 12, 2023 — — 23.67 355 2022 February October 1 - December 31, 2021 $ 0.45 $ 5,672 $ 30.00 $ 7,500 February (8) January 1 - February 8, 2022 — — 13.35 258 May January 1 - March 31, 2022 0.75 9,570 30.00 7,500 August April 1 - June 30, 2022 0.75 9,571 30.00 7,500

Note 5 - Net Income Per Commo_2

Note 5 - Net Income Per Common Unit (Tables)	9 Months Ended
Note 5 - Net Income Per Common Unit (Tables)	Sep. 30, 2023
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	For the Three Months Ended September 30, For the Nine Months Ended September 30, (In thousands, except per unit data) 2023 2022 2023 2022 Basic net income per common unit Net income attributable to common unitholders $ 42,951 $ 65,714 $ 135,199 $ 179,119 Weighted average common units—basic 12,635 12,506 12,613 12,476 Basic net income per common unit $ 3.40 $ 5.25 $ 10.72 $ 14.36 Diluted net income per common unit Weighted average common units—basic 12,635 12,506 12,613 12,476 Plus: dilutive effect of preferred units 1,104 6,210 2,434 6,210 Plus: dilutive effect of warrants 1,492 807 1,296 759 Plus: dilutive effect of unvested unit-based awards 240 195 190 204 Weighted average common units—diluted 15,471 19,718 16,533 19,649 Net income $ 63,846 $ 74,555 $ 213,455 $ 205,274 Less: income attributable to preferred unitholders (786 ) — (2,693 ) — Less: redemption of preferred units (17,083 ) — (60,929 ) — Diluted net income attributable to common unitholders and the general partner $ 45,977 $ 74,555 $ 149,833 $ 205,274 Less: diluted net income attributable to the general partner (920 ) (1,491 ) (2,997 ) (4,105 ) Diluted net income attributable to common unitholders $ 45,057 $ 73,064 $ 146,836 $ 201,169 Diluted net income per common unit $ 2.91 $ 3.71 $ 8.88 $ 10.24

Note 6 - Segment Information (T

Note 6 - Segment Information (Tables)	9 Months Ended
Note 6 - Segment Information (Tables)	Sep. 30, 2023
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Operating Segments (In thousands) Mineral Rights Soda Ash Corporate and Financing Total For the Three Months Ended September 30, 2023 Revenues $ 73,112 $ 12,401 $ — $ 85,513 Gain on asset sales and disposals 854 — — 854 Operating and maintenance expenses 8,305 53 — 8,358 Depreciation, depletion and amortization 4,589 — 5 4,594 General and administrative expenses — — 5,669 5,669 Asset impairments 63 — — 63 Other expenses, net — — 3,837 3,837 Net income (loss) 61,009 12,348 (9,511 ) 63,846 For the Three Months Ended September 30, 2022 Revenues $ 87,348 $ 14,556 $ — $ 101,904 Gain on asset sales and disposals 354 — — 354 Operating and maintenance expenses 7,867 31 — 7,898 Depreciation, depletion and amortization 6,850 — — 6,850 General and administrative expenses — — 4,518 4,518 Asset impairments 812 — — 812 Other expenses, net — — 7,625 7,625 Net income (loss) 72,173 14,525 (12,143 ) 74,555 For the Nine Months Ended September 30, 2023 Revenues $ 217,258 $ 58,633 $ — $ 275,891 Gain on asset sales and disposals 955 — — 955 Operating and maintenance expenses 23,226 225 — 23,451 Depreciation, depletion and amortization 12,455 — 14 12,469 General and administrative expenses — — 17,157 17,157 Asset impairments 132 — — 132 Other expenses, net — — 10,182 10,182 Net income (loss) 182,400 58,408 (27,353 ) 213,455 For the Nine Months Ended September 30, 2022 Revenues $ 247,172 $ 44,036 $ — $ 291,208 Gain on asset sales and disposals 699 — — 699 Operating and maintenance expenses 25,884 105 — 25,989 Depreciation, depletion and amortization 16,565 — — 16,565 General and administrative expenses — — 14,037 14,037 Asset impairments 874 — — 874 Other expenses, net — — 29,168 29,168 Net income (loss) 204,548 43,931 (43,205 ) 205,274

Note 7 - Equity Investment (Tab

Note 7 - Equity Investment (Tables)	9 Months Ended
Note 7 - Equity Investment (Tables)	Sep. 30, 2023
Notes Tables
Equity Method Investments [Table Text Block]	For the Three Months Ended September 30, For the Nine Months Ended September 30, (In thousands) 2023 2022 2023 2022 Balance at beginning of period $ 290,900 $ 280,300 $ 306,470 $ 276,004 Income allocation to NRP’s equity interests (1) 13,608 15,732 62,184 47,601 Amortization of basis difference (1,207 ) (1,176 ) (3,551 ) (3,565 ) Other comprehensive income (loss) 2,200 289 (16,472 ) (1,179 ) Distribution (23,010 ) (10,339 ) (66,140 ) (34,055 ) Balance at end of period $ 282,491 $ 284,806 $ 282,491 $ 284,806 For the Three Months Ended September 30, For the Nine Months Ended September 30, (In thousands) 2023 2022 2023 2022 Net sales $ 180,232 $ 190,450 $ 588,725 $ 542,955 Gross profit 34,454 39,679 148,063 119,723 Net income 27,772 32,105 126,906 97,144

Note 8 - Mineral Rights, Net (T

Note 8 - Mineral Rights, Net (Tables)	9 Months Ended
Note 8 - Mineral Rights, Net (Tables)	Sep. 30, 2023
Notes Tables
Mineral Properties Disclosure [Table Text Block]	September 30, 2023 December 31, 2022 (In thousands) Carrying Value Accumulated Depletion Net Book Value Carrying Value Accumulated Depletion Net Book Value Coal properties $ 661,680 $ (279,988 ) $ 381,692 $ 661,812 $ (269,037 ) $ 392,775 Aggregates properties 8,655 (3,723 ) 4,932 8,655 (3,410 ) 5,245 Oil and gas royalty properties 12,354 (9,962 ) 2,392 12,354 (9,600 ) 2,754 Other 13,144 (1,612 ) 11,532 13,150 (1,612 ) 11,538 Total mineral rights, net $ 695,833 $ (295,285 ) $ 400,548 $ 695,971 $ (283,659 ) $ 412,312

Note 9 - Debt, Net (Tables)

Note 9 - Debt, Net (Tables)	9 Months Ended
Note 9 - Debt, Net (Tables)	Sep. 30, 2023
Notes Tables
Schedule of Long-Term Debt Instruments [Table Text Block]	September 30, December 31, (In thousands) 2023 2022 Opco Credit Facility $ 128,034 $ 70,000 Opco Senior Notes 5.55 $ — $ 2,366 4.73 6,004 6,004 5.82 12,684 25,368 8.92 4,011 8,023 5.03 45,683 45,683 5.18 11,643 11,643 Total Opco Senior Notes $ 80,025 $ 99,087 Total debt at face value $ 208,059 $ 169,087 Net unamortized debt issuance costs (544 ) (806 ) Total debt, net $ 207,515 $ 168,281 Less: current portion of long-term debt (36,780 ) (39,076 ) Total long-term debt, net $ 170,735 $ 129,205

Note 10 - Fair Value Measurem_2

Note 10 - Fair Value Measurements (Tables)	9 Months Ended
Note 10 - Fair Value Measurements (Tables)	Sep. 30, 2023
Notes Tables
Fair Value Option, Disclosures [Table Text Block]	September 30, 2023 December 31, 2022 Fair Value Carrying Estimated Carrying Estimated ( In thousands Hierarchy Level Value Fair Value Value Fair Value Debt: Opco Senior Notes (1) 3 $ 79,481 $ 75,815 $ 98,281 $ 96,060 Opco Credit Facility (2) 3 128,034 128,034 70,000 70,000 Assets: Contract receivable, net (current and long-term) (3) 3 $ 29,570 $ 24,880 $ 31,371 $ 24,833

Note 11 - Related Party Trans_2

Note 11 - Related Party Transactions (Tables)	9 Months Ended
Note 11 - Related Party Transactions (Tables)	Sep. 30, 2023
Notes Tables
Schedule of Related Party Transactions [Table Text Block]	For the Three Months Ended September 30, For the Nine Months Ended September 30, (In thousands) 2023 2022 2023 2022 Operating and maintenance expenses $ 1,663 $ 1,687 $ 5,094 $ 5,044 General and administrative expenses 1,287 1,195 3,860 3,660

Note 12 - Major Customers (Tabl

Note 12 - Major Customers (Tables)	9 Months Ended
Note 12 - Major Customers (Tables)	Sep. 30, 2023
Notes Tables
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]	For the Three Months Ended September 30, For the Nine Months Ended September 30, 2023 2022 2023 2022 (In thousands) Revenues Percent Revenues Percent Revenues Percent Revenues Percent Alpha Metallurgical Resources, Inc. (1) $ 17,219 20 % $ 21,000 21 % $ 61,122 22 % $ 81,638 28 % Foresight Energy Resources LLC ("Foresight") (1) $ 18,600 22 % $ 19,334 19 % $ 43,453 16 % $ 47,081 16 %

Note 14 - Unit-Based Compensa_2

Note 14 - Unit-Based Compensation (Tables)	9 Months Ended
Note 14 - Unit-Based Compensation (Tables)	Sep. 30, 2023
Notes Tables
Share-Based Payment Arrangement, Activity [Table Text Block]	(In thousands) Common Units Weighted Average Grant Date Fair Value per Common Unit Outstanding at January 1, 2023 386 $ 28.96 Granted 281 $ 56.84 Fully vested and issued (184 ) $ 26.30 Outstanding at September 30, 2023 483 $ 46.21

Note 16 - Credit Losses (Tables

Note 16 - Credit Losses (Tables)	9 Months Ended
Note 16 - Credit Losses (Tables)	Sep. 30, 2023
Notes Tables
Accounts Receivable, Allowance for Credit Loss [Table Text Block]	September 30, 2023 December 31, 2022 (In thousands) Gross CECL Allowance Net Gross CECL Allowance Net Receivables $ 46,294 $ (5,343 ) $ 40,951 $ 47,237 $ (4,461 ) $ 42,776 Long-term contract receivable 27,965 (968 ) 26,997 29,984 (1,038 ) 28,946 Total $ 74,259 $ (6,311 ) $ 67,948 $ 77,221 $ (5,499 ) $ 71,722

Note 1 - Basis of Presentation

Note 1 - Basis of Presentation (Details Textual)	9 Months Ended
Note 1 - Basis of Presentation (Details Textual)	Sep. 30, 2023
Number of Operating Segments	2
Number of Wholly Owned Operating Companies	1
Sisecam Wyoming [Member]
Equity Method Investment, Ownership Percentage	49%

Note 2 - Revenues From Contra_3

Note 2 - Revenues From Contracts With Customers (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue from Contract with Customer, Excluding Assessed Tax	$ 68,533	$ 81,379	$ 205,811	$ 231,795
Mineral Rights Segment [Member] \| Transportation and Processing Services [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	3,900	4,900	9,500	12,900
Sales-type Lease, Revenue	$ 600	$ 1,100	$ 1,900	$ 2,500

Note 2 - Revenues From Contra_4

Note 2 - Revenues From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue from contract with customers		$ 68,533	$ 81,379	$ 205,811	$ 231,795
Mineral Rights Segment [Member] \| Operating Segments [Member]
Revenues		73,112	87,348	217,258	247,172
Coal Royalty Revenues [Member] \| Mineral Rights Segment [Member]
Revenue from contract with customers		55,544	52,381	161,527	170,775
Production Lease Minimum Revenues [Member] \| Mineral Rights Segment [Member]
Revenue from contract with customers		850	1,885	2,025	3,542
Minimum Lease Straight-line Revenues [Member] \| Mineral Rights Segment [Member]
Revenue from contract with customers		4,464	4,778	13,414	14,235
Carbon Neutral Initiatives [Member] \| Mineral Rights Segment [Member]
Revenue from contract with customers		681	8,600	2,914	8,600
Property Tax Revenues [Member] \| Mineral Rights Segment [Member]
Revenue from contract with customers		1,770	1,360	4,710	4,527
Wheelage Revenues [Member] \| Mineral Rights Segment [Member]
Revenue from contract with customers		2,385	2,977	9,538	11,073
Coal Overriding Royalty Revenues [Member] \| Mineral Rights Segment [Member]
Revenue from contract with customers		827	1,367	1,165	2,307
Lease Amendment Revenues [Member] \| Mineral Rights Segment [Member]
Revenue from contract with customers		623	759	2,322	2,450
Aggregates Royalty Revenues [Member] \| Mineral Rights Segment [Member]
Revenue from contract with customers		736	884	2,175	2,691
Oil and Gas Royalty Revenues [Member] \| Mineral Rights Segment [Member]
Revenue from contract with customers		324	6,170	5,126	10,890
Other Revenues [Member] \| Mineral Rights Segment [Member]
Revenue from contract with customers		329	218	895	705
Transportation and Processing Services [Member] \| Mineral Rights Segment [Member]
Revenues	[1]	$ 4,579	$ 5,969	$ 11,447	$ 15,377

[1]Transportation and processing services revenues from contracts with customers as defined under ASC 606 was $3.9 million and $4.9 million for the three months ended September 30, 2023 and 2022, respectively and $9.5 million and $12.9 million for the nine months ended September 30, 2023 and 2022, respectively. The remaining transportation and processing services revenues of $0.6 million and $1.1 million for the three months ended September 30, 2023 and 2022, respectively, and $1.9 million and $2.5 million for the nine months ended September 30, 2023 and 2022, respectively, related to other NRP-owned infrastructure leased to and operated by third-party operators accounted for under other guidance. See Note 15. Financing Transaction for more information.

Note 2 - Revenue From Contracts

Note 2 - Revenue From Contracts With Customers - Assets and Liabilities (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Current portion of deferred revenue		$ 6,399		$ 6,256
Deferred revenue		35,076		40,181
Balance		46,437	$ 61,862
Increase due to minimums and lease amendment fees		11,525	11,309
Recognition of previously deferred revenue		(16,487)	(28,403)
Balance		41,475	$ 44,768
Coal Royalty Revenues [Member]
Current portion of deferred revenue		6,399		6,256
Deferred revenue		35,076		40,181
Coal Royalty Revenues [Member] \| Accounts Receivable [Member]
Contract with customer, current		34,775		39,004
Coal Royalty Revenues [Member] \| Other Current Assets [Member]
Contract with customer, current	[1]	2,382		0
Coal Royalty Revenues [Member] \| Other Noncurrent Assets [Member]
Contract with customer, noncurrent	[2]	$ 0		$ 75

[1]Other current assets, net includes short-term notes receivables from contracts with customers.[2]Other long-term assets, net includes long-term lease amendment fee receivables from contracts with customers.

Note 2 - Revenue From Contrac_2

Note 2 - Revenue From Contracts With Customers - Operating Lease Payments Receivable (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Weighted average remaining years (Year)	7 years 2 months 12 days
Annual minimum payments	$ 57,413	[1]
Lease Term, 0 to 5 Years [Member]
Weighted average remaining years (Year)	1 year 8 months 12 days
Annual minimum payments	$ 19,867	[1]
Lease Term, 5 to 10 Years [Member]
Weighted average remaining years (Year)	4 years 9 months 18 days
Annual minimum payments	$ 10,417	[1]
Lease Term, Greater Than 10 Years [Member]
Weighted average remaining years (Year)	12 years
Annual minimum payments	$ 27,129	[1]

[1]Lease term does not include renewal periods.

Note 3 - Class A Convertible _3

Note 3 - Class A Convertible Preferred Units and Warrants (Details Textual) $ / shares in Units, $ in Thousands		1 Months Ended					9 Months Ended
	Mar. 02, 2017 USD ($) $ / shares shares	Sep. 30, 2023 USD ($) $ / shares shares	Aug. 31, 2023 USD ($) shares	Jun. 30, 2023 USD ($) shares	May 31, 2023 USD ($) shares	Feb. 28, 2023 USD ($) shares	Sep. 30, 2023 USD ($) $ / shares shares	Sep. 18, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Sep. 30, 2022 $ / shares shares
Temporary Equity, Par or Stated Value Per Share (in dollars per share) \| $ / shares		$ 1,000					$ 1,000		$ 1,000
Preferred Units, Number of Redeemed Units (in shares)		(15,001)	(35,000)	(45,000)	(35,834)	(47,499)	(178,334)
Warrants and Rights Outstanding \| $		$ 32,843					$ 32,843		$ 47,964
Class of Warrant or Right, Outstanding (in shares)		2,190,000					2,190,000		3,002,500
Warrants at 22.81 Strike Price [Member]
Class of Warrant or Right Warrants, Issued (in shares)	1,750,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) \| $ / shares	$ 22.81
Warrants at 22.81 Strike Price [Member] \| Warrant Holder [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) \| $ / shares		$ 22.81					$ 22.81	$ 22.81	$ 22.81	$ 22.81
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		0					0	752,500	750,000	750,000
Warrants at 34.00 Strike Price [Member]
Class of Warrant or Right Warrants, Issued (in shares)	2,250,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) \| $ / shares	$ 34
Warrants at 34.00 Strike Price [Member] \| Warrant Holder [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) \| $ / shares		$ 34					$ 34	$ 34	$ 34	$ 34
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		2,190,000					2,190,000	60,000	2,250,000	2,250,000
Warrants and Rights Outstanding \| $								$ 33,600
Warrants to Purchase Common Units [Member]
Class of Warrant or Right, Outstanding (in shares)									3,000,000
Warrants to Purchase Common Units [Member] \| Warrant Holders’ Interest [Member]
Warrants and Rights Outstanding \| $		$ 32,800					$ 32,800		$ 48,000
Class A Convertible Preferred Units [Member]
Preferred Units, Issued (in shares)	250,000
Temporary Equity, Par or Stated Value Per Share (in dollars per share) \| $ / shares	$ 1,000
Preferred Units Origination Fee Percent	2.50%
Preferred Stock, Dividend Rate, Percentage	12%
Convertible Preferred Units Maximum Redeemed Units Percent	33%
Convertible Preferred Units, Redemption Price, Minimum (in dollars per share) \| $ / shares	$ 51
Debt Instrument Covenants Consolidated Leverage Ratio Minimum	3.25
Debt Instrument Covenants Distributable Cash Flow Ratio Maximum	1.2
Partners' Capital, Distribution Amount Per Share (in dollars per share) \| $ / shares	$ 0.45
Preferred Units Preferred Purchaser Approval Rights Ownership Threshold	20%
Preferred Units, Number of Redeemed Units (in shares)		(15,001)	(35,000)	(45,000)	(35,834)	(47,499)
Preferred Units, Value of Redeemed Units \| $		$ 15,000	$ 35,000	$ 45,000	$ 35,800	$ 47,500
Preferred Units, Outstanding (in shares)		71,666					71,666
Class A Convertible Preferred Units [Member] \| Debt Instrument, Redemption, Period One [Member]
Convertible Preferred Units Conversion to Common Units Discount Percentage	7.50%
Convertible Preferred Units Purchase Price Multiplier	1.5
Class A Convertible Preferred Units [Member] \| Debt Instrument, Redemption, Period Three [Member]
Convertible Preferred Units Conversion to Common Units Discount Percentage	10%
Convertible Preferred Units Purchase Price Multiplier	1.85
Class A Convertible Preferred Units [Member] \| Debt Instrument, Redemption, Period Two [Member]
Convertible Preferred Units Purchase Price Multiplier	1.7
Preferred Stock [Member]
Proceeds from Issuance of Preferred Stock, Preference Stock, and Warrants, Total \| $	$ 250,000

Note 3 - Class A Convertible _4

Note 3 - Class A Convertible Preferred Units and Warrants - Preferred Units Activity (Details) - USD ($) $ in Thousands	1 Months Ended						9 Months Ended	12 Months Ended
	Sep. 30, 2023	Aug. 31, 2023	Jun. 30, 2023	May 31, 2023	Feb. 28, 2023	Feb. 28, 2022	Sep. 30, 2023	Dec. 31, 2022
Beginning balance, units outstanding (in shares)							250,000
Beginning balance, financial position							$ 164,587
Redemption of preferred units paid-in-kind, units outstanding (in shares)						(19,321)
Redemption of preferred units, units outstanding (in shares)	(15,001)	(35,000)	(45,000)	(35,834)	(47,499)		(178,334)
Redemption of preferred units, financial position							$ (117,406)
Ending balance, units outstanding (in shares)	71,666						71,666	250,000
Ending balance, financial position	$ 47,181						$ 47,181	$ 164,587
Preferred Partner [Member] \| Preferred Stock [Member]
Beginning balance, units outstanding (in shares)							250,000	269,321
Beginning balance, financial position							$ 164,587	$ 183,908
Redemption of preferred units paid-in-kind, units outstanding (in shares)								(19,321)
Redemption of preferred units paid-in-kind, financial position								$ (19,321)
Ending balance, units outstanding (in shares)	71,666						71,666	250,000
Ending balance, financial position	$ 47,181						$ 47,181	$ 164,587

Note 3 - Class A Convertible _5

Note 3 - Class A Convertible Preferred Units and Warrants - Warrants Activity (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($) shares
Balance (in shares) \| shares	3,002,500
Balance \| $	$ 47,964
Warrant settlement (in shares) \| shares	(812,500)
Warrant settlement \| $	$ (15,121)
Balance (in shares) \| shares	2,190,000
Balance \| $	$ 32,843

Note 4 - Common and Preferred_3

Note 4 - Common and Preferred Unit Distributions (Details Textual) - USD ($) $ in Thousands	1 Months Ended						3 Months Ended						9 Months Ended
	Sep. 30, 2023	Aug. 31, 2023	Jun. 30, 2023	May 31, 2023	Feb. 28, 2023	Feb. 28, 2022	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Allocation to unitholders							$ 2,936	$ 5,000	$ 6,700	$ 7,500	$ 7,500	$ 7,500	$ 14,568	$ 22,500
Preferred Stock Redemption Premium							17,083			0			$ 60,929	0
Preferred Units, Number of Redeemed Units (in shares)	(15,001)	(35,000)	(45,000)	(35,834)	(47,499)								(178,334)
Distribution Made to Limited Partner, Unit Redemption (in shares)						(19,321)
Feb 2023 Redeemed Units [Member] \| Preferred Partner [Member] \| Preferred Stock [Member]
Dividends, Preferred Stock, Cash					$ 600
May 2023 Redeemed Units [Member] \| Preferred Partner [Member] \| Preferred Stock [Member]
Dividends, Preferred Stock, Cash				$ 400
June 2023 Redeemed Units [Member] \| Preferred Partner [Member] \| Preferred Stock [Member]
Dividends, Preferred Stock, Cash			$ 900
August 2023 Redeemed Units [Member] \| Preferred Partner [Member] \| Preferred Stock [Member]
Dividends, Preferred Stock, Cash		$ 400
September 2023 Redeemed Units [Member] \| Preferred Partner [Member] \| Preferred Stock [Member]
Dividends, Preferred Stock, Cash	$ 400
Common Unitholders And General Partner [Member]
Allocation to unitholders							$ (2,900)	$ (5,000)	$ (6,700)	$ (7,500)			$ (14,600)	$ (22,500)
Partner, General [Member]
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest													2%

Note 4 - Common and Preferred_4

Note 4 - Common and Preferred Unit Distributions - Distributions Made to Partners (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended													3 Months Ended
		Sep. 30, 2023	Aug. 31, 2023	Jun. 30, 2023	May 31, 2023		Mar. 31, 2023	[1]	Feb. 28, 2023		Aug. 31, 2022	May 31, 2022	Feb. 28, 2022		Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022
Distributions, common units															$ 9,669	$ 9,669	$ 40,900	$ 9,571	$ 9,570	$ 5,672
Preferred Partner [Member] \| Preferred Stock [Member]
Distribution per unit, common units (in dollars per share)			$ 30		$ 30		$ 0		$ 30		$ 30	$ 30	$ 30
Distribution, preferred stock			$ 3,650		$ 6,075		$ 0		$ 7,500		$ 7,500	$ 7,500	$ 7,500
Preferred Partner [Member] \| Preferred Stock [Member] \| Feb 2023 Redeemed Units [Member]
Distribution per unit, common units (in dollars per share)	[2]								$ 12.33
Distribution, preferred stock	[2]								$ 586
Preferred Partner [Member] \| Preferred Stock [Member] \| May 2023 Redeemed Units [Member]
Distribution per unit, common units (in dollars per share)	[3]				$ 11.33
Distribution, preferred stock	[3]				$ 406
Preferred Partner [Member] \| Preferred Stock [Member] \| June 2023 Redeemed Units [Member]
Distribution per unit, common units (in dollars per share)	[4]			$ 20.33
Distribution, preferred stock	[4]			$ 915
Preferred Partner [Member] \| Preferred Stock [Member] \| August 2023 Redeemed Units [Member]
Distribution per unit, common units (in dollars per share)			$ 12.33
Distribution, preferred stock			$ 432
Preferred Partner [Member] \| Preferred Stock [Member] \| September 2023 Redeemed Units [Member]
Distribution per unit, common units (in dollars per share)		$ 23.67
Distribution, preferred stock		$ 355
Preferred Partner [Member] \| Preferred Stock [Member] \| February 2022 Redeemed Units [Member]
Distribution per unit, common units (in dollars per share)													$ 13.35
Distribution, preferred stock													$ 258
Common Unitholders, General Partner [Member]
Distribution per unit, common units (in dollars per share)					$ 0.75		$ 2.43		$ 0.75		$ 0.75	$ 0.75	$ 0.45
Distributions, common units					$ 9,669	[5]	$ 31,329	[5]	$ 9,571	[5]	$ 9,571	$ 9,570	$ 5,672	[5]
Common Unitholders, General Partner [Member] \| Feb 2023 Redeemed Units [Member]
Distribution per unit, common units (in dollars per share)	[2]								$ 0
Distributions, common units	[2],[5]								$ 0
Common Unitholders, General Partner [Member] \| May 2023 Redeemed Units [Member]
Distribution per unit, common units (in dollars per share)	[3]				$ 0
Distributions, common units	[3],[5]				$ 0
Common Unitholders, General Partner [Member] \| June 2023 Redeemed Units [Member]
Distribution per unit, common units (in dollars per share)	[4]			$ 0
Distributions, common units	[4],[5]			$ 0
Common Unitholders, General Partner [Member] \| August 2023 Redeemed Units [Member]
Distribution per unit, common units (in dollars per share)	[6]		$ 0
Distributions, common units					$ 0
Common Unitholders, General Partner [Member] \| September 2023 Redeemed Units [Member]
Distribution per unit, common units (in dollars per share)	[7]	$ 0
Distributions, common units		$ 0
Common Unitholders, General Partner [Member] \| February 2022 Redeemed Units [Member]
Distribution per unit, common units (in dollars per share)	[8]												$ 0
Distributions, common units	[5]												$ 0

[1]Special distribution was made to help cover unitholder tax liabilities associated with owning NRP's common units during 2022.[2]Relates to accrued distribution paid upon the redemption of 47,499 preferred units in February 2023.[3]Relates to accrued distribution paid upon the redemption of 35,834 preferred units in May 2023.[4]Relates to accrued distribution paid upon the redemption of 45,000 preferred units in June 2023.[5]Totals include the amount paid to NRP's general partner in accordance with the general partner's 2% general partner interest.[6]Relates to accrued distribution paid upon the redemption of 35,000 preferred units in August 2023.[7]Relates to accrued distribution paid upon the redemption of 15,001 preferred units in September 2023.[8]Relates to accrued distribution paid upon the redemption of 19,321 preferred units paid-in-kind in February 2022.

Note 5 - Net Income Per Commo_3

Note 5 - Net Income Per Common Unit (Details Textual) - $ / shares	Sep. 30, 2023	Sep. 18, 2023	Dec. 31, 2022	Sep. 30, 2022	Mar. 02, 2017
Warrants at 34.00 Strike Price [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)					$ 34
Warrants at 22.81 Strike Price [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)					$ 22.81
Warrant Holder [Member] \| Warrants at 34.00 Strike Price [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	2,190,000	60,000	2,250,000	2,250,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 34	$ 34	$ 34	$ 34
Warrant Holder [Member] \| Warrants at 22.81 Strike Price [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	0	752,500	750,000	750,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 22.81	$ 22.81	$ 22.81	$ 22.81

Note 5 - Net Income Per Commo_4

Note 5 - Net Income Per Common Unit - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended											9 Months Ended
	Sep. 30, 2023		Jun. 30, 2023	[2]	Mar. 31, 2023	[3]	Sep. 30, 2022	Jun. 30, 2022	[4]	Mar. 31, 2022	[4]	Sep. 30, 2023	Sep. 30, 2022
Net income attributable to common unitholders	$ 42,951						$ 65,714					$ 135,199	$ 179,119
Weighted average common units—basic (in shares)	12,635						12,506					12,613	12,476
Basic net income per common unit (in dollars per share)	$ 3.4						$ 5.25					$ 10.72	$ 14.36
Plus: dilutive effect of preferred units (in shares)	1,104						6,210					2,434	6,210
Plus: dilutive effect of warrants (in shares)	1,492						807					1,296	759
Plus: dilutive effect of unvested unit-based awards (in shares)	240						195					190	204
Weighted average common units—diluted (in shares)	15,471						19,718					16,533	19,649
Net income	$ 63,846	[1]	$ 70,334		$ 79,275		$ 74,555	$ 66,820		$ 63,899		$ 213,455	$ 205,274
Less: income attributable to preferred unitholders	(786)						0					(2,693)	0
Less: redemption of preferred units	(17,083)						0					(60,929)	0
Diluted net income attributable to common unitholders and the general partner	45,977						74,555					149,833	205,274
Less: diluted net income attributable to the general partner	(920)						(1,491)					(2,997)	(4,105)
Diluted net income attributable to common unitholders	$ 45,057						$ 73,064					$ 146,836	$ 201,169
Diluted net income per common unit (in dollars per share)	$ 2.91						$ 3.71					$ 8.88	$ 10.24

[1]Net income includes $2.9 million of income attributable to preferred unitholders that accumulated during the period, of which $2.9 million is allocated to the common unitholders and $0.1 million is allocated to the general partner.[2]Net income includes $5.0 million of income attributable to preferred unitholders that accumulated during the period, of which $4.9 million is allocated to the common unitholders and $0.1 million is allocated to the general partner.[3]Net income includes $6.7 million of income attributable to preferred unitholders that accumulated during the period, of which $6.5 million is allocated to the common unitholders and $0.1 million is allocated to the general partner.[4]Net income includes $7.5 million of income attributable to preferred unitholders that accumulated during the period, of which $7.4 million is allocated to the common unitholders and $0.2 million is allocated to the general partner.

Note 6 - Segment Information (D

Note 6 - Segment Information (Details Textual)	9 Months Ended
Note 6 - Segment Information (Details Textual)	Sep. 30, 2023
Number of Operating Segments	2
Sisecam Wyoming [Member]
Equity Method Investment, Ownership Percentage	49%

Note 6 - Segment Information -

Note 6 - Segment Information - Information By Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues	$ 85,513	$ 101,904	$ 275,891	$ 291,208
Gain on asset sales and disposals	854	354	955	699
Operating and maintenance expenses	8,358	7,898	23,451	25,989
Depreciation, depletion and amortization	4,594	6,850	12,469	16,565
General and administrative expenses	5,669	4,518	17,157	14,037
Asset impairments	63	812	132	874
Other expenses, net	3,837	7,625	10,182	29,168
Net income (loss)	63,846	74,555	213,455	205,274
Corporate, Non-Segment [Member]
Revenues	0	0	0	0
Gain on asset sales and disposals	0	0	0	0
Operating and maintenance expenses	0	0	0	0
Depreciation, depletion and amortization	5	0	14	0
General and administrative expenses	5,669	4,518	17,157	14,037
Asset impairments	0	0	0	0
Other expenses, net	3,837	7,625	10,182	29,168
Net income (loss)	(9,511)	(12,143)	(27,353)	(43,205)
Mineral Rights Segment [Member]
Depreciation, depletion and amortization	4,100	6,400	11,600	15,500
Mineral Rights Segment [Member] \| Operating Segments [Member]
Revenues	73,112	87,348	217,258	247,172
Gain on asset sales and disposals	854	354	955	699
Operating and maintenance expenses	8,305	7,867	23,226	25,884
Depreciation, depletion and amortization	4,589	6,850	12,455	16,565
General and administrative expenses	0	0	0	0
Asset impairments	63	812	132	874
Other expenses, net	0	0	0	0
Net income (loss)	61,009	72,173	182,400	204,548
Soda Ash Segment [Member] \| Operating Segments [Member]
Revenues	12,401	14,556	58,633	44,036
Gain on asset sales and disposals	0	0	0	0
Operating and maintenance expenses	53	31	225	105
Depreciation, depletion and amortization	0	0	0	0
General and administrative expenses	0	0	0	0
Asset impairments	0	0	0	0
Other expenses, net	0	0	0	0
Net income (loss)	$ 12,348	$ 14,525	$ 58,408	$ 43,931

Note 7 - Equity Investment (Det

Note 7 - Equity Investment (Details Textual) - Sisecam Wyoming [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Equity Method Investment, Ownership Percentage	49%		49%
Reclassification Out Of Accumulated Other Comprehensive Income (Loss)	$ 0.9	$ (1.2)	$ (17.4)	$ (5.7)

Note 7 - Equity Investment - In

Note 7 - Equity Investment - Investment Activity (Details) - USD ($) $ in Thousands		3 Months Ended											9 Months Ended
		Sep. 30, 2023		Jun. 30, 2023		Mar. 31, 2023		Sep. 30, 2022	Jun. 30, 2022		Mar. 31, 2022		Sep. 30, 2023	Sep. 30, 2022
Beginning Balance						$ 306,470							$ 306,470
Ending Balance		$ 282,491											282,491
Net income		63,846	[1]	$ 70,334	[2]	79,275	[3]	$ 74,555	$ 66,820	[4]	$ 63,899	[4]	213,455	$ 205,274
Sisecam Wyoming [Member]
Net sales		180,232						190,450					588,725	542,955
Gross profit		34,454						39,679					148,063	119,723
Net income		27,772						32,105					126,906	97,144
Sisecam Wyoming [Member]
Beginning Balance		290,900				$ 306,470		280,300			$ 276,004		306,470	276,004
Income allocation to NRP’s equity interests (1)	[5]	13,608						15,732					62,184	47,601
Amortization of basis difference		(1,207)						(1,176)					(3,551)	(3,565)
Other comprehensive income (loss)		2,200						289					(16,472)	(1,179)
Distribution		(23,010)						(10,339)					(66,140)	(34,055)
Ending Balance		$ 282,491		$ 290,900				$ 284,806	$ 280,300				$ 282,491	$ 284,806

[1]Net income includes $2.9 million of income attributable to preferred unitholders that accumulated during the period, of which $2.9 million is allocated to the common unitholders and $0.1 million is allocated to the general partner.[2]Net income includes $5.0 million of income attributable to preferred unitholders that accumulated during the period, of which $4.9 million is allocated to the common unitholders and $0.1 million is allocated to the general partner.[3]Net income includes $6.7 million of income attributable to preferred unitholders that accumulated during the period, of which $6.5 million is allocated to the common unitholders and $0.1 million is allocated to the general partner.[4]Net income includes $7.5 million of income attributable to preferred unitholders that accumulated during the period, of which $7.4 million is allocated to the common unitholders and $0.2 million is allocated to the general partner.[5]Amounts reclassified into income out of accumulated other comprehensive loss were $2.3 million and $(3.0) million for the three months ended June 30, 2023 and 2022, respectively, and $(18.3) million and $(4.7) million for the six months ended June 30, 2023 and 2022, respectively.

Note 8 - Mineral Rights, Net (D

Note 8 - Mineral Rights, Net (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Depreciation, Depletion and Amortization	$ 4,594	$ 6,850	$ 12,469	$ 16,565
Mineral Rights Segment [Member]
Depreciation, Depletion and Amortization	$ 4,100	$ 6,400	$ 11,600	$ 15,500

Note 8 - Mineral Rights, Net -

Note 8 - Mineral Rights, Net - Composition of Mineral Rights (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Mineral Properties, carrying value	$ 695,833	$ 695,971
Mineral Properties, accumulated depletion	(295,285)	(283,659)
Mineral Properties, net book value	400,548	412,312
Coal Properties [Member]
Mineral Properties, carrying value	661,680	661,812
Mineral Properties, accumulated depletion	(279,988)	(269,037)
Mineral Properties, net book value	381,692	392,775
Aggregates Properties [Member]
Mineral Properties, carrying value	8,655	8,655
Mineral Properties, accumulated depletion	(3,723)	(3,410)
Mineral Properties, net book value	4,932	5,245
Oil and Gas Royalty Properties [Member]
Mineral Properties, carrying value	12,354	12,354
Mineral Properties, accumulated depletion	(9,962)	(9,600)
Mineral Properties, net book value	2,392	2,754
Other [Member]
Mineral Properties, carrying value	13,144	13,150
Mineral Properties, accumulated depletion	(1,612)	(1,612)
Mineral Properties, net book value	$ 11,532	$ 11,538

Note 9 - Debt, Net (Details Tex

Note 9 - Debt, Net (Details Textual) $ in Thousands	3 Months Ended	9 Months Ended
Note 9 - Debt, Net (Details Textual) $ in Thousands	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	May 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Aug. 30, 2022 USD ($)
Nontrade Receivables, Noncurrent	$ 26,997	$ 26,997			$ 28,946
Long-Term Debt, Gross	208,059	208,059			169,087
Opco [Member] \| Floating Rate Revolving Credit Facility Due August 2027 [Member]
Line of Credit Facility, Remaining Borrowing Capacity	27,000	27,000		$ 155,000	60,000	$ 130,000
Line of Credit Facility, Maximum Borrowing Capacity, Addition of Future Commitments				$ 200,000
Ratio of EBITDA To Consolidated Fixed Charges				3.5
Long-Term Line of Credit	$ 128,000	128,000			70,000
Proceeds from Lines of Credit		215,000
Repayments of Lines of Credit		$ 157,000
Long-Term Debt, Weighted Average Interest Rate, over Time	8.85%	8.61%
Nontrade Receivables, Noncurrent	$ 27,000	$ 27,000			28,900
Long-Term Debt, Gross	128,034	128,034			70,000
Opco [Member] \| Floating Rate Revolving Credit Facility Due August 2027 [Member] \| Other Noncurrent Assets [Member]
Debt Instrument, Collateral Amount	321,600	321,600			326,400
Opco [Member] \| Senior Notes [Member]
Long-Term Debt, Gross	$ 80,000	80,000			$ 99,100
Repayments of Debt		$ 19,100	$ 19,100
Opco [Member] \| The Eight Point Nine Two Senior Notes Due March Two Zero Two Four [Member]
Debt Instrument, Interest Rate, Stated Percentage	8.92%	8.92%
Partnership Leverage Ratio, Maximum	3.75	3.75
Debt Instrument, Additional Variable Interest Rate	2%	2%

Note 9 - Debt, Net - Schedule o

Note 9 - Debt, Net - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt instrument, carrying value	$ 208,059	$ 169,087
Net unamortized debt issuance costs	(544)	(806)
Total debt, net	207,515	168,281
Less: current portion of long-term debt	(36,780)	(39,076)
Total long-term debt, net	170,735	129,205
Opco Senior Notes [Member]
Debt instrument, carrying value	80,025	99,087
Opco Senior Notes [Member] \| Five Point Five Five Percent Senior Note Due June Two Zero Two Three [Member]
Debt instrument, carrying value	0	2,366
Opco Senior Notes [Member] \| Four Point Seven Three Percent Senior Note Due December Two Zero Two Three [Member]
Debt instrument, carrying value	6,004	6,004
Opco Senior Notes [Member] \| Five Point Eight Two Percent Senior Note Due March Two Zero Two Four [Member]
Debt instrument, carrying value	12,684	25,368
Opco Senior Notes [Member] \| Eight Point Nine Two Percent Senior Note Due March Two Zero Two Four [Member]
Debt instrument, carrying value	4,011	8,023
Opco Senior Notes [Member] \| Five Point Zero Three Percent Senior Note Due December Two Zero Two Six [Member]
Debt instrument, carrying value	45,683	45,683
Opco Senior Notes [Member] \| Five Point One Eight Percent Senior Note Due December Two Zero Two Six [Member]
Debt instrument, carrying value	11,643	11,643
Opco [Member] \| Floating Rate Revolving Credit Facility Due August 2027 [Member]
Debt instrument, carrying value	$ 128,034	$ 70,000

Note 9 - Debt, Net - Schedule_2

Note 9 - Debt, Net - Schedule of Long-term Debt (Details) (Parentheticals) - Opco Senior Notes [Member]	Sep. 30, 2023	Dec. 31, 2022
Five Point Five Five Percent Senior Note Due June Two Zero Two Three [Member]
Debt instrument, interest rate		5.55%
Four Point Seven Three Percent Senior Note Due December Two Zero Two Three [Member]
Debt instrument, interest rate	4.73%	4.73%
Five Point Eight Two Percent Senior Note Due March Two Zero Two Four [Member]
Debt instrument, interest rate	5.82%	5.82%
Eight Point Nine Two Percent Senior Note Due March Two Zero Two Four [Member]
Debt instrument, interest rate	8.92%	8.92%
Five Point Zero Three Percent Senior Note Due December Two Zero Two Six [Member]
Debt instrument, interest rate	5.03%	5.03%
Five Point One Eight Percent Senior Note Due December Two Zero Two Six [Member]
Debt instrument, interest rate	5.18%	5.18%

Note 10 - Fair Value Measurem_3

Note 10 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Discount Rate	15%	15%
Embedded Derivative, Fair Value of Embedded Derivative Liability	$ 0	$ 0

Note 10 - Fair Value Measurem_4

Note 10 - Fair Value Measurements - Fair Value of Financial Assets and Liabilities (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands		Sep. 30, 2023	Dec. 31, 2022
Reported Value Measurement [Member]
Contract receivable, net (current and long-term)	[1]	$ 29,570	$ 31,371
Estimate of Fair Value Measurement [Member]
Contract receivable, net (current and long-term)	[1]	24,880	24,833
Opco Senior Notes [Member] \| Reported Value Measurement [Member]
Long term debt, fair value	[2]	79,481	98,281
Opco Senior Notes [Member] \| Estimate of Fair Value Measurement [Member]
Long term debt, fair value	[2]	75,815	96,060
Floating Rate Revolving Credit Facility Due August 2027 [Member] \| Reported Value Measurement [Member]
Long term debt, fair value	[3]	128,034	70,000
Floating Rate Revolving Credit Facility Due August 2027 [Member] \| Estimate of Fair Value Measurement [Member]
Long term debt, fair value	[3]	$ 128,034	$ 70,000

[1]The fair value of the Partnership's contract receivable is determined based on the present value of future cash flow projections related to the underlying asset at a discount rate of 15% at June 30, 2023 and December 31, 2022.[2]The fair value of the Opco Senior Notes at June 30, 2023 and December 31, 2022 were estimated by management utilizing the present value replacement method incorporating the interest rate of the Opco Credit facility at June 30, 2023 and December 31, 2022, respectively.[3]The fair value of the Opco Credit Facility approximates the outstanding borrowing amount because the interest rates are variable and reflective of market rates and the terms of the credit facility allow the Partnership to repay the debt at any time without penalty.

Note 11 - Related Party Trans_3

Note 11 - Related Party Transactions (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Accounts Payable, Current	$ 1,143		$ 1,143		$ 1,992
Operating Costs and Expenses	8,358	$ 7,898	23,451	$ 25,989
Quintana Minerals Corp [Member] \| Affiliated Entity [Member]
Accounts Payable, Current	400		400		400
Western Pocahontas Properties Limited Partnership [Member] \| Affiliated Entity [Member]
Accounts Payable, Current	300		300		$ 1,000
Operating Costs and Expenses	$ 1,100	$ 2,200	$ 5,100	$ 6,500

Note 11 - Related Party Trans_4

Note 11 - Related Party Transactions - General Partner Affiliates (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating Costs and Expenses	$ 8,358	$ 7,898	$ 23,451	$ 25,989
QMC and WPPLP and QID [Member] \| Affiliated Entity [Member]
Operating Costs and Expenses	1,663	1,687	5,094	5,044
General and administrative expenses	$ 1,287	$ 1,195	$ 3,860	$ 3,660

Note 12 - Major Customers - Con

Note 12 - Major Customers - Concentration Risk (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Alpha Metallurgical Resources [Member]
Net sales	[1]	$ 17,219	$ 21,000	$ 61,122	$ 81,638
Alpha Metallurgical Resources [Member] \| Revenue Benchmark [Member] \| Customer Concentration Risk [Member]
Revenue, percent (1)	[1]	20%	21%	22%	28%
Foresight Energy Resources [Member]
Net sales	[1]	$ 18,600	$ 19,334	$ 43,453	$ 47,081
Foresight Energy Resources [Member] \| Revenue Benchmark [Member] \| Customer Concentration Risk [Member]
Revenue, percent (1)	[1]	22%	19%	16%	16%

[1]Revenues from Alpha Metallurgical Resources, Inc. and Foresight are included within the Partnership's Mineral Rights segment.

Note 14 - Unit-Based Compensa_3

Note 14 - Unit-Based Compensation (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Fair Value			$ 16	$ 7.9
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 15.8		$ 15.8		$ 6.3
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			2 years 1 month 6 days
General and Administrative Expenses and Operating and Maintenance Expense [Member]
Share-Based Payment Arrangement, Expense	$ 2.7	$ 1.4	$ 7.9	$ 4.2

Note 14 - Unit-Based Compensa_4

Note 14 - Unit-Based Compensation - Share-based Compensation Activity (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2023 $ / shares shares
Outstanding (in shares) \| shares	386
Outstanding (in dollars per share) \| $ / shares	$ 28.96
Granted (in shares) \| shares	281
Granted (in dollars per share) \| $ / shares	$ 56.84
Fully vested and issued (in shares) \| shares	(184)
Fully vested and issued (in dollars per share) \| $ / shares	$ 26.3
Outstanding (in shares) \| shares	483
Outstanding (in dollars per share) \| $ / shares	$ 46.21

Note 15 - Financing Transacti_2

Note 15 - Financing Transaction (Details Textual) - Sugar Camp Mine [Member] - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2032
Lessor, Operating Lease, Renewal Term (Year)	80 years
Proceeds from Annual Minimum Lease Payments	$ 5,000,000
Forecast [Member]
Operating Lease, Lease Income		$ 10,000

Note 16 - Credit Losses (Detail

Note 16 - Credit Losses (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Financing Receivable, Credit Loss, Expense (Reversal)	$ 1,600	$ 0	$ 800	$ 600

Note 16 - Credit Losses - Allow

Note 16 - Credit Losses - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Receivables	$ 46,294	$ 47,237
Receivables	(5,343)	(4,461)
Receivables	40,951	42,776
Long-term contract receivable	27,965	29,984
Long-term contract receivable	(968)	(1,038)
Long-term contract receivable	26,997	28,946
Total	74,259	77,221
Total	(6,311)	(5,499)
Total	$ 67,948	$ 71,722

Note 17 - Subsequent Events (De

Note 17 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Thousands				1 Months Ended
	Oct. 31, 2023	Oct. 26, 2023	Oct. 06, 2023	Nov. 30, 2023	Sep. 30, 2023	Sep. 18, 2023	Dec. 31, 2022	Sep. 30, 2022	Mar. 02, 2017
Warrants at 34.00 Strike Price [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)									$ 34
Warrants at 34.00 Strike Price [Member] \| Warrant Holder [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)					2,190,000	60,000	2,250,000	2,250,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)					$ 34	$ 34	$ 34	$ 34
Subsequent Event [Member]
Distribution Made to Limited Partner, Distributions Paid, Per Unit (in dollars per share)				$ 0.75
Dividends, Preferred Stock, Cash				$ 2,150
Subsequent Event [Member] \| Warrants at 34.00 Strike Price [Member] \| Warrant Holder [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	1,540,000	350,000	300,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 34	$ 34	$ 34
Proceeds from Warrant Exercises	$ 9,700	$ 11,100	$ 11,400