Core Natural Resources (CNR) 10-Q 5 Nov 24 2024 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2024	Oct. 25, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	001-38147
Entity Registrant Name	CONSOL Energy Inc
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	82-1954058
Entity Address, Address Line One	275 Technology Drive
Entity Address, Address Line Two	Suite 101
Entity Address, City or Town	Canonsburg
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	15317-9565
City Area Code	724
Local Phone Number	416-8300
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	CEIX
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		29,394,466
Entity Central Index Key	0001710366
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2024

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Total Revenue and Other Income	$ 574,855	$ 569,864	$ 1,641,020	$ 1,919,438
Costs and Expenses:
Operating and Other Costs	304,134	276,323	885,234	813,546
Depreciation, Depletion and Amortization	53,329	58,792	165,173	182,871
Freight Expense	63,406	68,372	198,888	217,435
General and Administrative Costs	36,151	37,313	77,669	79,758
Loss on Debt Extinguishment	0	662	0	2,725
Interest Expense	4,664	6,645	15,063	24,079
Total Costs and Expenses	461,684	448,107	1,342,027	1,320,414
Earnings Before Income Tax	113,171	121,757	298,993	599,024
Income Tax Expense	17,539	21,032	43,409	100,199
Net Income	$ 95,632	$ 100,725	$ 255,584	$ 498,825
Earnings per Share:
Total Basic Earnings per Share (in dollars per share)	$ 3.23	$ 3.15	$ 8.60	$ 14.97
Total Dilutive Earnings per Share (in dollars per share)	3.22	3.11	8.57	14.75
Dividends declared per common share (in dollars per share)	$ 0.25	$ 0	$ 0.25	$ 2.20
Coal Revenue
Total Revenue and Other Income	$ 462,489	$ 449,618	$ 1,319,738	$ 1,574,096
Terminal Revenue
Total Revenue and Other Income	23,740	22,676	60,288	80,755
Freight Revenue
Total Revenue and Other Income	63,406	68,372	198,888	217,435
Miscellaneous Other Income
Total Revenue and Other Income	25,044	27,852	55,146	40,070
Gain on Sale of Assets
Total Revenue and Other Income	$ 176	$ 1,346	$ 6,960	$ 7,082

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income	$ 95,632	$ 100,725	$ 255,584	$ 498,825
Other Comprehensive Income (Loss):
Actuarially Determined Long-Term Liability Adjustments (Net of tax: ($111), $274, ($332), $822)	385	(901)	1,155	(2,702)
Unrealized Gain (Loss) on Investments in Available-for-Sale Securities (Net of tax: ($69), $2, ($28), $15)	238	(6)	95	(49)
Other Comprehensive Income (Loss)	623	(907)	1,250	(2,751)
Comprehensive Income (Loss)	$ 96,255	$ 99,818	$ 256,834	$ 496,074

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Actuarially determined long-term liability adjustment, tax	$ (111)	$ 274	$ (332)	$ 822
Unrealized (loss) gain on investments available-for-sale securities tax expense (benefit)	$ (69)	$ 2	$ (28)	$ 15

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current Assets:
Cash and Cash Equivalents	$ 331,674	$ 199,371
Short-Term Investments	84,333	81,932
Accounts and Notes Receivable
Trade Receivables, net	131,492	147,612
Other Receivables, net	13,480	12,765
Inventories	116,632	88,154
Other Current Assets	66,982	71,172
Total Current Assets	744,593	601,006
Property, Plant and Equipment:
Property, Plant and Equipment	5,701,714	5,552,404
Less - Accumulated Depreciation, Depletion and Amortization	3,792,369	3,649,281
Total Property, Plant and Equipment—Net	1,909,345	1,903,123
Other Assets:
Right of Use Asset - Operating Leases	5,846	14,658
Salary Retirement	51,933	47,246
Other Noncurrent Assets, net	112,400	108,970
Total Other Assets	170,179	170,874
TOTAL ASSETS	2,824,117	2,675,003
Current Liabilities:
Accounts Payable	145,301	137,243
Current Portion of Long-Term Debt	111,898	11,106
Operating Lease Liability, Current Portion	808	4,769
Other Accrued Liabilities	282,008	290,606
Total Current Liabilities	540,015	443,724
Long-Term Debt:
Long-Term Debt	79,336	181,885
Finance Lease Obligations	4,344	4,182
Total Long-Term Debt	83,680	186,067
Deferred Credits and Other Liabilities:
Postretirement Benefits Other Than Pensions	201,811	207,908
Pneumoconiosis Benefits	150,628	154,943
Asset Retirement Obligations	208,375	212,621
Workers’ Compensation	37,380	39,144
Salary Retirement	20,675	20,808
Operating Lease Liability	5,589	10,385
Deferred Income Taxes	36,579	36,219
Other Noncurrent Liabilities	9,890	19,742
Total Deferred Credits and Other Liabilities	670,927	701,770
TOTAL LIABILITIES	1,294,622	1,331,561
Stockholders' Equity:
Common Stock, $0.01 Par Value; 62,500,000 Shares Authorized, 29,394,466 Shares Issued and Outstanding at September 30, 2024; 29,910,439 Shares Issued and Outstanding at December 31, 2023	294	299
Capital in Excess of Par Value	538,054	547,861
Retained Earnings	1,138,957	944,342
Accumulated Other Comprehensive Loss	(147,810)	(149,060)
TOTAL EQUITY	1,529,495	1,343,442
TOTAL LIABILITIES AND EQUITY	$ 2,824,117	$ 2,675,003

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	62,500,000	62,500,000
Common stock, shares issued (in shares)	29,394,466	29,910,439
Common stock, shares outstanding (in shares)	29,394,466	29,910,439

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive (Loss) Income
Beginning balance at Dec. 31, 2022	$ 1,165,826	$ 347	$ 646,237	$ 668,882	$ (149,640)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	230,377			230,377
Actuarially determined long-term liability adjustments	(901)				(901)
Investments in available-for-sale securities	212				212
Comprehensive Income (Loss)	229,688			230,377	(689)
Issuance of Common Stock	0	3	(3)
Repurchases of common stock	(67,133)	(11)	(22,446)	(44,676)
Excise Tax on Repurchases of Common Stock	(478)			(478)
Employee Stock-Based Compensation	4,792		4,792
Shares Withheld for Taxes	(12,708)		(12,708)
Dividends on common shares	(38,287)			(38,287)
Dividend Equivalents Earned on Stock-Based Compensation Awards	(803)			(803)
Ending balance at Mar. 31, 2023	1,280,897	339	615,872	815,015	(150,329)
Beginning balance at Dec. 31, 2022	1,165,826	347	646,237	668,882	(149,640)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	498,825
Actuarially determined long-term liability adjustments	(2,702)
Investments in available-for-sale securities	(49)
Comprehensive Income (Loss)	496,074
Ending balance at Sep. 30, 2023	1,308,790	312	569,071	891,798	(152,391)
Beginning balance at Mar. 31, 2023	1,280,897	339	615,872	815,015	(150,329)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	167,723			167,723
Actuarially determined long-term liability adjustments	(900)				(900)
Investments in available-for-sale securities	(255)				(255)
Comprehensive Income (Loss)	166,568			167,723	(1,155)
Repurchases of common stock	(75,627)	(12)	(22,261)	(53,354)
Excise Tax on Repurchases of Common Stock	(728)			(728)
Employee Stock-Based Compensation	1,993		1,993
Shares Withheld for Taxes	(38)		(38)
Dividends on common shares	(37,187)			(37,187)
Dividend Equivalents Earned on Stock-Based Compensation Awards	(683)			(683)
Ending balance at Jun. 30, 2023	1,335,195	327	595,566	890,786	(151,484)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	100,725			100,725
Actuarially determined long-term liability adjustments	(901)				(901)
Investments in available-for-sale securities	(6)				(6)
Comprehensive Income (Loss)	99,818			100,725	(907)
Repurchases of common stock	(126,634)	(15)	(28,171)	(98,448)
Excise Tax on Repurchases of Common Stock	(1,265)			(1,265)
Employee Stock-Based Compensation	1,676		1,676
Ending balance at Sep. 30, 2023	1,308,790	312	569,071	891,798	(152,391)
Beginning balance at Dec. 31, 2023	1,343,442	299	547,861	944,342	(149,060)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	101,891			101,891
Actuarially determined long-term liability adjustments	385				385
Investments in available-for-sale securities	(126)				(126)
Comprehensive Income (Loss)	102,150			101,891	259
Issuance of Common Stock	0	1	(1)
Repurchases of common stock	(55,881)	(6)	(11,264)	(44,611)
Excise Tax on Repurchases of Common Stock	(471)			(471)
Employee Stock-Based Compensation	5,129		5,118	11
Shares Withheld for Taxes	(5,551)		(5,551)
Ending balance at Mar. 31, 2024	1,388,818	294	536,163	1,001,162	(148,801)
Beginning balance at Dec. 31, 2023	1,343,442	299	547,861	944,342	(149,060)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	255,584
Actuarially determined long-term liability adjustments	1,155
Investments in available-for-sale securities	95
Comprehensive Income (Loss)	256,834
Ending balance at Sep. 30, 2024	1,529,495	294	538,054	1,138,957	(147,810)
Beginning balance at Mar. 31, 2024	1,388,818	294	536,163	1,001,162	(148,801)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	58,061			58,061
Actuarially determined long-term liability adjustments	385				385
Investments in available-for-sale securities	(17)				(17)
Comprehensive Income (Loss)	58,429			58,061	368
Issuance of Common Stock	0	1	(1)
Repurchases of common stock	(10,997)	(1)	(2,407)	(8,589)
Excise Tax on Repurchases of Common Stock	(82)			(82)
Employee Stock-Based Compensation	2,262		2,237	25
Shares Withheld for Taxes	(27)		(27)
Ending balance at Jun. 30, 2024	1,438,403	294	535,965	1,050,577	(148,433)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	95,632			95,632
Actuarially determined long-term liability adjustments	385				385
Investments in available-for-sale securities	238				238
Comprehensive Income (Loss)	96,255			95,632	623
Excise Tax on Repurchases of Common Stock	2			2
Employee Stock-Based Compensation	2,252		2,051	201
Shares Withheld for Taxes	38		38
Dividends on common shares	(7,348)			(7,348)
Dividend Equivalents Earned on Stock-Based Compensation Awards	(107)			(107)
Ending balance at Sep. 30, 2024	$ 1,529,495	$ 294	$ 538,054	$ 1,138,957	$ (147,810)

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023
Statement of Stockholders' Equity [Abstract]
Actuarially determined long-term liability adjustments, tax	$ (111)	$ (110)	$ (111)	$ 274	$ 274	$ 274
Investments in available-for-sale securities, tax	$ (69)	$ 5	$ 36	$ 2	$ 77	$ (64)
Repurchases of common stock (in shares)		132,063	615,288	1,547,846	1,225,134	1,207,409
Dividends declared per common share (in dollars per share)	$ 0.25			$ 0	$ 1.10	$ 1.10

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash Flows from Operating Activities:
Net Income	$ 255,584	$ 498,825
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation, Depletion and Amortization	165,173	182,871
Gain on Sale of Assets	(6,960)	(7,082)
Stock-Based Compensation	9,406	8,461
Amortization of Debt Issuance Costs	2,812	4,534
Loss on Debt Extinguishment	0	2,725
Deferred Income Taxes	360	(837)
Other Adjustments to Net Income	(2,183)	(2,571)
Changes in Operating Assets:
Accounts and Notes Receivable	15,420	37,670
Inventories	(28,461)	(32,096)
Other Current Assets	1,844	(4,522)
Changes in Other Assets	(1,479)	(26,913)
Changes in Operating Liabilities:
Accounts Payable	4,298	7,759
Commodity Derivatives, net Liability	0	(15,142)
Other Operating Liabilities	(8,887)	28,751
Changes in Other Liabilities	(51,847)	(43,615)
Net Cash Provided by Operating Activities	355,080	638,818
Cash Flows from Investing Activities:
Capital Expenditures	(137,148)	(117,749)
Proceeds from Sales of Assets	7,320	6,240
Investments in Mining-Related Activities	(3,582)	(5,366)
Proceeds from Sales of Short-Term Investments	44,075	83,924
Purchases of Short-Term Investments	(43,265)	(162,422)
Other Investing Activity	(2,100)	(350)
Net Cash Used in Investing Activities	(134,700)	(195,723)
Cash Flows from Financing Activities:
Payments on Finance Lease Obligations	(8,258)	(19,490)
Payments on Other Debt	(905)	(729)
Shares Withheld for Taxes	(5,540)	(12,746)
Repurchases of Common Stock	(70,879)	(277,382)
Debt-Related Financing Fees	0	(2,810)
Dividends and Dividend Equivalents Paid	(8,451)	(75,474)
Net Cash Used in Financing Activities	(94,033)	(554,053)
Net Increase (Decrease) in Cash and Cash Equivalents and Restricted Cash	126,347	(110,958)
Cash and Cash Equivalents and Restricted Cash at Beginning of Period	243,268	326,952
Cash and Cash Equivalents and Restricted Cash at End of Period	369,615	215,994
Non-Cash Investing and Financing Activities:
Finance Lease	3,248	588
Term Loan B Facility
Cash Flows from Financing Activities:
Payments on debt	0	(63,590)
Senior Secured Second Lien Notes due 2025
Cash Flows from Financing Activities:
Payments on debt	$ 0	$ (101,832)

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	BASIS OF PRESENTATION: Basis of Presentation The accompanying Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States (“GAAP”) for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three and nine months ended September 30, 2024 are not necessarily indicative of the results that may be expected for future periods. The Consolidated Balance Sheet at December 31, 2023 has been derived from the Audited Consolidated Financial Statements at that date but does not include all disclosures required by GAAP. This Form 10-Q report should be read in conjunction with CONSOL Energy Inc.'s Annual Report on Form 10-K for the year ended December 31, 2023. All dollar amounts discussed in these Notes to Consolidated Financial Statements are in thousands of U.S. dollars, except for share and per share amounts, and unless otherwise indicated. Basis of Consolidation The Consolidated Financial Statements include the accounts of CONSOL Energy Inc. and its wholly-owned and majority-owned and/or controlled subsidiaries. All significant intercompany transactions and accounts have been eliminated in consolidation. Recent Accounting Pronouncements In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09 Income Taxes (Topic 740). The amendments in this update address investor requests for more transparency about income tax information through improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. The amendments in this update require that public business entities on an annual basis (1) disclose specific categories in the rate reconciliation, (2) provide additional information for reconciling items that meet a quantitative threshold (if the effect of those reconciling items is equal to or greater than five percent of the amount computed by multiplying pretax income (or loss) by the applicable statutory income tax rate), (3) disclose the amount of income taxes paid (net of refunds received) disaggregated by federal (national), state, and foreign taxes, (4) disclose the amount of income taxes paid (net of refunds received) disaggregated by individual jurisdictions in which income taxes paid (net of refunds received) is equal to or greater than five percent of total income taxes paid (net of refunds received), (5) disclose income (or loss) from continuing operations before income tax expense (or benefit) disaggregated between domestic and foreign, and (6) disclose income tax expense (or benefit) from continuing operations disaggregated by federal (national), state, and foreign. The amendments in this update are effective for annual periods beginning after December 15, 2024, and should be applied prospectively. Management is currently evaluating the impact of this guidance, but with the exception of the increased disclosures summarized above, does not expect this update to have a material impact on the Company's financial statements. In November 2023, the FASB issued ASU 2023-07 Segment Reporting (Topic 280). The amendments in this update improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analyses. Topic 280 requires a public entity to report a measure of segment profit or loss that the chief operating decision maker uses to assess segment performance and make decisions about allocating resources. Topic 280 also requires other specified segment items and amounts, such as depreciation, amortization, and depletion expense, to be disclosed under certain circumstances. The amendments in this update do not change or remove those disclosure requirements. The amendments in this update also do not change how a public entity identifies its operating segments, aggregates those operating segments, or applies the quantitative thresholds to determine its reportable segments. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024 and should be applied retrospectively. Management is currently evaluating the impact of this guidance, but with the exception of the incremental disclosures related to segment expenses summarized above, does not expect this update to have a material impact on the Company's financial statements. In August 2023, the FASB issued ASU 2023-05 - Business Combinations—Joint Venture Formations (Subtopic 805-60). The amendments in this update address the accounting for contributions made to a joint venture, upon formation, in a joint venture's separate financial statements. The objectives of the amendments are to (1) provide decision-useful information to investors and other allocators of capital in a joint venture's financial statements and (2) reduce diversity in practice. The amendments in this update do not amend the definition of a joint venture, the accounting by an equity method investor for its investment in a joint venture, or the accounting by a joint venture for contributions received after its formation. The amendments in this update are effective prospectively for all joint venture formations with a formation date on or after January 1, 2025. Existing joint ventures may elect to apply the guidance retrospectively. Management is currently evaluating the impact of this guidance, but does not expect this update to have a material impact on the Company's financial statements. Earnings per Share Basic earnings per share are computed by dividing net income by the weighted average number of shares outstanding during the reporting period. Dilutive earnings per share are computed similarly to basic earnings per share, except that the weighted average number of shares outstanding is increased to include additional shares from restricted stock units and performance share units, if dilutive. The number of additional shares is calculated by assuming that outstanding restricted stock units and performance share units were released, and that the proceeds from such activities, as applicable, were used to acquire shares of common stock at the average market price during the reporting period. The table below sets forth the share-based awards that have been excluded from the computation of diluted earnings per share because their effect would be anti-dilutive: Three Months Ended Nine Months Ended 2024 2023 2024 2023 Anti-Dilutive Restricted Stock Units 377 — 458 1,031 Anti-Dilutive Performance Share Units — — — — 377 — 458 1,031 The computations for basic and dilutive earnings per share are as follows: Dollars in thousands, except share and per share data Three Months Ended Nine Months Ended 2024 2023 2024 2023 Numerator: Net Income $ 95,632 $ 100,725 $ 255,584 $ 498,825 Denominator: Weighted-average shares of common stock outstanding 29,580,649 31,928,295 29,705,627 33,330,892 Effect of dilutive shares 121,406 464,394 118,962 479,628 Weighted-average diluted shares of common stock outstanding 29,702,055 32,392,689 29,824,589 33,810,520 Earnings per Share: Basic $ 3.23 $ 3.15 $ 8.60 $ 14.97 Dilutive $ 3.22 $ 3.11 $ 8.57 $ 14.75 As of September 30, 2024, CONSOL Energy has 500,000 shares of preferred stock authorized, none of which are issued or outstanding.

Revenue From Contracts With Cus

Revenue From Contracts With Customers	9 Months Ended
	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	REVENUE FROM CONTRACTS WITH CUSTOMERS: The following tables disaggregate CONSOL Energy's revenue from contracts with customers by product type and market: Three Months Ended September 30, 2024 Domestic Export Total Power Generation $ 163,769 $ 63,027 $ 226,796 Industrial 2,485 148,980 151,465 Metallurgical 8,200 76,028 84,228 Total Coal Revenue 174,454 288,035 462,489 Terminal Revenue 23,740 Freight Revenue 63,406 Other Revenue 3,797 Total Revenue from Contracts with Customers $ 553,432 Three Months Ended September 30, 2023 Domestic Export Total Power Generation $ 169,143 $ 37,134 $ 206,277 Industrial 11,076 169,709 180,785 Metallurgical — 62,556 62,556 Total Coal Revenue 180,219 269,399 449,618 Terminal Revenue 22,676 Freight Revenue 68,372 Total Revenue from Contracts with Customers $ 540,666 Nine Months Ended September 30, 2024 Domestic Export Total Power Generation $ 515,159 $ 156,013 $ 671,172 Industrial 13,636 420,570 434,206 Metallurgical 31,222 183,138 214,360 Total Coal Revenue 560,017 759,721 1,319,738 Terminal Revenue 60,288 Freight Revenue 198,888 Other Revenue 11,927 Total Revenue from Contracts with Customers $ 1,590,841 Nine Months Ended September 30, 2023 Domestic Export Total Power Generation $ 476,598 $ 270,736 $ 747,334 Industrial 29,814 560,382 590,196 Metallurgical 10,627 225,939 236,566 Total Coal Revenue 517,039 1,057,057 1,574,096 Terminal Revenue 80,755 Freight Revenue 217,435 Total Revenue from Contracts with Customers $ 1,872,286 Coal Revenue The Company has disaggregated its coal revenue, derived from the PAMC and the Itmann Mining Complex, between domestic and export revenues, as well as between the industrial, power generation and metallurgical markets. Domestic coal revenue tends to be derived from contracts that typically have a term of one year or longer, and the pricing is typically fixed. Historically, export coal revenue tended to be derived from spot or shorter-term contracts with pricing determined closer to the time of shipment or based on a market index; however, the Company has secured several long-term export contracts with varying pricing arrangements. Coal revenue derived from the Itmann Mining Complex consists primarily of metallurgical coal sales, while coal revenue derived from the PAMC services the industrial, power generation and metallurgical markets due to the nature of its coal quality characteristics. CONSOL Energy's coal revenue is recognized when the performance obligation has been satisfied, and the corresponding transaction price has been determined. Generally, title passes when coal is loaded at the coal preparation facilities, at terminal locations or other customer destinations. The Company's coal contract revenue per ton is fixed or determinable based upon either fixed forward pricing or pricing derived from established indices and adjusted for nominal quality characteristics. Some coal contracts also contain positive electric power price-related adjustments, which represent market-driven price adjustments, in addition to a fixed base price per ton. The Company’s coal contracts generally do not allow for retroactive adjustments to pricing after title to the coal has passed and typically do not have significant financing components. The estimated transaction price from each of the Company's contracts is based on the total amount of consideration to which the Company expects to be entitled under the contract. Included in the transaction price for certain coal supply contracts is the impact of variable consideration, including quality price adjustments, handling services and per ton price fluctuations based on certain coal sales price indices. The estimated transaction price for each contract is allocated to the Company's performance obligations based on relative stand-alone selling prices determined at contract inception. The Company has determined that each ton of coal represents a separate and distinct performance obligation. While CONSOL Energy does, from time to time, experience costs of obtaining coal customer contracts with amortization periods greater than one year, those costs are generally immaterial. At September 30, 2024 and December 31, 2023, the Company did not have any capitalized costs to obtain customer contracts on its Consolidated Balance Sheets. As of and for the three and nine months ended September 30, 2024 and 2023, the Company has not recognized any amortization of previously existing capitalized costs of obtaining customer contracts. Further, the Company has not recognized any coal revenue in the current period that is not a result of current period performance. Terminal Revenue Terminal revenues are attributable to the Company's CONSOL Marine Terminal and include revenues earned from providing receipt and unloading of coal from rail cars, transporting coal from the receipt point to temporary storage or stockpile facilities located at the Terminal, stockpiling, blending, weighing, sampling, redelivery, and loading of coal onto vessels. Revenues for these services are earned and performance obligations are considered fulfilled as the services are performed. The CONSOL Marine Terminal does not normally experience material costs of obtaining customer contracts with amortization periods greater than one year. At September 30, 2024 and December 31, 2023, the Company did not have any capitalized costs to obtain customer contracts on its Consolidated Balance Sheets. As of and for the three and nine months ended September 30, 2024 and 2023, the Company has not recognized any amortization of previously existing capitalized costs of obtaining Terminal customer contracts. Further, the Company has not recognized any Terminal revenue in the current period that is not a result of current period performance. Freight Revenue Some of CONSOL Energy's coal contracts require that the Company sell its coal at locations other than its coal preparation plants. The cost to transport the Company's coal to the ultimate sales point is passed through to the Company's customers and CONSOL Energy recognizes the freight revenue equal to the transportation costs when title to the coal passes to the customer. Other Revenue Other revenue consists of revenue generated from carbon products and materials businesses led by CONSOL Innovations LLC, our wholly-owned subsidiary. This revenue is primarily comprised of sales of composite tools that are used in the aerospace industry. Revenues for these products are earned and recognized as the tools are built and progress toward product completion. Additionally, other revenue consists of revenue generated from the processing of third-party coal at the Itmann Mining Complex. Revenues for these services are earned and performance obligations are considered fulfilled as the services are performed. Other revenue is included within Miscellaneous Other Income in the accompanying Consolidated Statements of Income. Contract Balances Contract assets, when present, are recorded separately from trade receivables in the Company's Consolidated Balance Sheets and are reclassified to trade receivables as title passes to the customer and the Company's right to consideration becomes unconditional. Credit is extended based on an evaluation of a customer's financial condition and a customer's ability to perform its obligations. CONSOL Energy typically does not have material contract assets that are stated separately from trade receivables since the Company's performance obligations are satisfied as control of the goods or services passes to the customer, thereby granting the Company an unconditional right to receive consideration. Contract liabilities relate to consideration received in advance of the satisfaction of the Company's performance obligations. Contract liabilities are recognized as revenue at the point in time when control of the goods passes to the customer, or over time when services are provided.

Components of Pension and Other

Components of Pension and Other Post-employment Benefit (OPEB) Plans Net Periodic Benefit Costs	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Components of Pension and Other Post-employment Benefit (OPEB) Plans Net Periodic Benefit Costs	COMPONENTS OF PENSION AND OTHER POST-EMPLOYMENT BENEFIT (OPEB) PLANS NET PERIODIC BENEFIT COSTS: The components of Net Periodic Benefit Cost (Credit) are as follows: Pension Benefits Other Post-Employment Benefits Three Months Ended Nine Months Ended Three Months Ended Nine Months Ended 2024 2023 2024 2023 2024 2023 2024 2023 Service Cost $ 302 $ 304 $ 906 $ 913 $ — $ — $ — $ — Interest Cost 6,431 6,756 19,293 20,270 2,758 3,261 8,274 9,783 Expected Return on Plan Assets (7,991) (9,867) (23,973) (29,602) — — — — Amortization of Prior Service Credits — — — — (601) (601) (1,804) (1,804) Amortization of Actuarial Loss (Gain) 1,567 185 4,699 555 (70) — (209) — Net Periodic Benefit Cost (Credit) $ 309 ($2,622) $ 925 ($7,864) $ 2,087 $ 2,660 $ 6,261 $ 7,979 Expenses (credits) related to pension and other post-employment benefits are reflected in Operating and Other Costs in the Consolidated Statements of Income. Amounts reclassified out of accumulated other comprehensive (loss) income are reflected in Operating and Other Costs in the Consolidated Statements of Income.

Components of Coal Workers' Pne

Components of Coal Workers' Pneumoconiosis (CWP) and Workers' Compensation Net Periodic Benefit Costs	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Components of Coal Workers' Pneumoconiosis (CWP) and Workers' Compensation Net Periodic Benefit Costs	COMPONENTS OF COAL WORKERS’ PNEUMOCONIOSIS (CWP) AND WORKERS’ COMPENSATION NET PERIODIC BENEFIT COSTS: The components of Net Periodic Benefit Cost are as follows: CWP Workers' Compensation Three Months Ended Nine Months Ended Three Months Ended Nine Months Ended 2024 2023 2024 2023 2024 2023 2024 2023 Service Cost $ 746 $ 578 $ 2,239 $ 1,734 $ 1,465 $ 1,400 $ 4,393 $ 4,198 Interest Cost 2,066 2,071 6,198 6,214 572 628 1,717 1,885 Amortization of Actuarial Loss (Gain) 109 (261) 326 (784) (540) (512) (1,620) (1,537) State Administrative Fees and Insurance Bond Premiums — — — — 464 471 1,393 1,482 Net Periodic Benefit Cost $ 2,921 $ 2,388 $ 8,763 $ 7,164 $ 1,961 $ 1,987 $ 5,883 $ 6,028 Expenses related to CWP and workers’ compensation are reflected in Operating and Other Costs in the Consolidated Statements of Income. Amounts reclassified out of accumulated other comprehensive (loss) income are reflected in Operating and Other Costs in the Consolidated Statements of Income.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES: The Company recorded its provision for income taxes for the three and nine months ended September 30, 2024 of $17,539, or 15.5%, and $43,409, or 14.5%, respectively, of earnings before income taxes, based on its annual estimated income tax rate adjusted for discrete items. The effective tax rate for the three and nine months ended September 30, 2024 differs from the U.S. federal statutory rate of 21%, primarily due to the tax benefit for excess percentage depletion and foreign derived intangible income. These tax provision amounts also include discrete tax adjustments related to equity compensation and changes to uncertain tax positions. The provision for income taxes for the three and nine months ended September 30, 2023 of $21,032, or 17.3% , and $100,199, or 16.7%, respectively, of earnings before income taxes was based on the Company's annual estimated income tax rate adjusted for discrete items. The effective tax rate for the three and nine months ended September 30, 2023 differed from the U.S. federal statutory rate of 21%, primarily due to the tax benefit for excess percentage depletion and foreign derived intangible income. The tax provision amounts also included discrete tax adjustments primarily related to equity compensation. The Company is subject to taxation in the United States and certain of its various states, as well as Canada and certain of its various provinces. The Company is subject to examination for the tax periods 2018 through 2023 for federal and state returns.

Cash and Cash Equivalents and S

Cash and Cash Equivalents and Short-Term Investments	9 Months Ended
	Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Cash and Cash Equivalents and Short-Term Investments	CASH AND CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS: The following table disaggregates CONSOL Energy's cash, cash equivalents and restricted cash, which reconciles to the total shown on the Consolidated Statements of Cash Flows: September 30, 2024 2023 Cash and Cash Equivalents $ 331,674 $ 167,586 Restricted Cash - Current (1) 37,941 46,313 Restricted Cash - Non-current — 2,095 Cash and Cash Equivalents and Restricted Cash $ 369,615 $ 215,994 (1) Restricted Cash - Current is included in Other Current Assets in the accompanying Consolidated Balance Sheets. The components of cash and cash equivalents and restricted cash as of December 31, 2023 and 2022 are disclosed in Note 6 in the Notes to the Consolidated Financial Statements included in the Company's Form 10-K for the year ended December 31, 2023, filed with the Securities and Exchange Commission on February 9, 2024. The Company has invested in marketable debt securities, primarily comprised of highly liquid U.S. Treasury securities. These investments are held in the custody of financial institutions. The securities outstanding at September 30, 2024 are classified as available-for-sale securities and have maturity dates ranging from October 2024 through July 2025, and are classified as current assets accordingly. The Company's investments in available-for-sale securities are as follows: September 30, 2024 Gross Unrealized Amortized Cost Allowance for Credit Losses Gains Losses Fair Value U.S. Treasury Securities $ 84,107 $ — $ 226 $ — $ 84,333 December 31, 2023 Gross Unrealized Amortized Cost Allowance for Credit Losses Gains Losses Fair Value U.S. Treasury Securities $ 81,829 $ — $ 103 $ — $ 81,932 Available-for-sale investments are reported at fair value in the accompanying balance sheet and any unrealized gains or losses are recognized in other comprehensive income (loss), net of tax. Any unrealized gains or losses in the Company's portfolio are a result of normal market fluctuations. Interest and dividends are included in net income when earned.

Credit Losses

Credit Losses	9 Months Ended
	Sep. 30, 2024
Credit Loss [Abstract]
Credit Losses	CREDIT LOSSES: Trade receivables are recorded at the invoiced amount. Credit is extended based on an evaluation of a customer's financial condition, the importance of the customer or market for future business and a customer's ability to perform its obligations. Trade receivable balances are monitored against approved credit terms. Credit terms are reviewed and adjusted as considered necessary based on changes to a customer's credit profile. If a customer's credit deteriorates, the Company may reduce credit risk exposure by reducing credit terms, obtaining letters of credit, obtaining credit insurance, or requiring pre-payment for shipments. Other non-trade contractual arrangements consist primarily of overriding royalty agreements and other financial arrangements between the Company and various counterparties. The Company may be at risk of exposure to credit losses primarily through sales of products and services. The Company's expected loss allowance methodology for accounts receivable is developed using historical collection experience, current and future economic and market conditions and a review of the current status of customers' trade and other accounts receivables. Due to the short-term nature of such receivables, the estimate of the amount of accounts receivable that may not be collected is based on an aging of the accounts receivable balances and the financial condition of customers. Additionally, specific allowance amounts may be necessary from time to time and are established to record the appropriate provision for customers that have a higher probability of default. The Company's monitoring activities include timely account reconciliations, dispute resolution, payment confirmation, and consideration of customers' financial condition and macroeconomic conditions. Balances are written off when determined to be uncollectible. Management estimates the allowance balance using relevant available information, from internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the estimation of expected credit losses. Adjustments to historical loss information are made for changes to the assessment of anticipated payment, changes in economic conditions, current industry trends in the markets the Company serves, and changes in the financial health of the Company's counterparties. The following table provides a roll-forward of the allowance for credit losses that is deducted from the amortized cost basis of accounts receivable and other non-trade contractual arrangements to present the net amount expected to be collected. Trade Receivables Other Non-Trade Contractual Beginning Balance, December 31, 2023 $ 466 $ 7,504 Provision for expected credit losses (131) (54) Ending Balance, September 30, 2024 $ 335 $ 7,450

Inventories

Inventories	9 Months Ended
	Sep. 30, 2024
Inventory Disclosure [Abstract]
Inventories	INVENTORIES: Inventory components consist of the following: September 30, December 31, Coal $ 41,578 $ 17,128 Supplies 75,054 71,026 Total Inventories $ 116,632 $ 88,154 Inventories are stated at the lower of cost or net realizable value. The cost of coal inventories is determined by the first-in, first-out (“FIFO”) method. Coal inventory costs include labor, supplies, equipment costs, operating overhead, depreciation, depletion, amortization and other related costs. The cost of supplies inventory is determined by the average cost method and includes operating and maintenance supplies to be used in the Company's coal operations.

Accounts Receivable Securitizat

Accounts Receivable Securitization	9 Months Ended
	Sep. 30, 2024
Receivables [Abstract]
Accounts Receivable Securitization	ACCOUNTS RECEIVABLE SECURITIZATION: At September 30, 2024, CONSOL Energy and certain of its U.S. subsidiaries are parties to a trade accounts receivable securitization facility with financial institutions for the sale on a continuous basis of eligible trade accounts receivable. In July 2022, the securitization facility was amended to, among other things, extend the maturity date to July 29, 2025. Pursuant to the securitization facility, CONSOL Thermal Holdings LLC, an indirect, wholly-owned subsidiary of the Company, sells trade receivables to CONSOL Pennsylvania Coal Company LLC, a wholly-owned subsidiary of the Company. CONSOL Marine Terminals LLC, a wholly-owned subsidiary of the Company, and CONSOL Pennsylvania Coal Company LLC sell and/or contribute trade receivables (including receivables sold to CONSOL Pennsylvania Coal Company LLC by CONSOL Thermal Holdings LLC) to CONSOL Funding LLC, a wholly-owned subsidiary of the Company (the “SPV”). The SPV, in turn, pledges its interests in the receivables to PNC Bank, N.A., which either makes loans or issues letters of credit on behalf of the SPV. The maximum amount of advances and letters of credit outstanding under the securitization facility may not exceed $100,000. Loans under the securitization facility accrue interest at a reserve-adjusted market index rate equal to the applicable term Secured Overnight Financing Rate (“SOFR”). Loans and letters of credit under the securitization facility also accrue a program fee and a letter of credit participation fee, respectively, ranging from 2.00% to 2.50% per annum depending on the total net leverage ratio of CONSOL Energy. In addition, the SPV paid certain structuring fees to PNC Capital Markets LLC and pays other customary fees to the lenders, including a fee on unused commitments equal to 0.60% per annum. At September 30, 2024, the Company's eligible accounts receivable yielded $57,465 of borrowing capacity. At September 30, 2024, the facility had no outstanding borrowings and $54,977 of letters of credit outstanding, leaving available borrowing capacity of $2,488. At December 31, 2023, the Company's eligible accounts receivable yielded $72,125 of borrowing capacity. At December 31, 2023, the facility had no outstanding borrowings and $72,087 of letters of credit outstanding, leaving available borrowing capacity of $38. Costs associated with the receivables facility totaled $354 and $1,066 for the three and nine months ended September 30, 2024, respectively, and $323 and $1,060 for the three and nine months ended September 30, 2023, respectively. The Company has not derecognized any receivables due to its continued involvement in the collections efforts.

Property, Plant and Equipment

Property, Plant and Equipment	9 Months Ended
	Sep. 30, 2024
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	PROPERTY, PLANT AND EQUIPMENT: Property, plant and equipment consists of the following: September 30, December 31, Plant and Equipment $ 3,584,192 $ 3,458,655 Coal Properties and Surface Lands 910,310 906,343 Airshafts 511,482 492,806 Mine Development 366,260 366,260 Advance Mining Royalties 329,470 328,340 Total Property, Plant and Equipment 5,701,714 5,552,404 Less: Accumulated Depreciation, Depletion and Amortization 3,792,369 3,649,281 Total Property, Plant and Equipment - Net $ 1,909,345 $ 1,903,123 Coal reserves are either owned in fee or controlled by lease. The duration of the leases vary; however, the lease terms are generally extended automatically to the exhaustion of economically recoverable reserves, as long as active mining continues. Coal interests held by lease provide the same rights as fee ownership for mineral extraction and are legally considered real property interests. As of September 30, 2024 and December 31, 2023, property, plant and equipment includes gross assets under finance leases of $28,269 and $44,622, respectively. Accumulated amortization for finance leases was $19,765 and $31,873 at September 30, 2024 and December 31, 2023, respectively. Amortization expense for assets under finance leases approximated $2,110 and $6,524 for the three months ended September 30, 2024 and 2023, respectively, and $7,652 and $20,369 for the nine months ended September 30, 2024 and 2023, respectively, and is included in Depreciation, Depletion and Amortization in the accompanying Consolidated Statements of Income.

Other Accrued Liabilities

Other Accrued Liabilities	9 Months Ended
	Sep. 30, 2024
Other Liabilities Disclosure [Abstract]
Other Accrued Liabilities	OTHER ACCRUED LIABILITIES: September 30, December 31, Subsidence Liability $ 112,678 $ 105,322 Accrued Compensation and Benefits 48,908 73,763 Accrued Other Taxes 10,092 12,276 Accrued Income Taxes 9,569 — Deferred Revenue 3,775 9,517 Accrued Interest 3,125 6,283 Other 16,851 10,457 Current Portion of Long-Term Liabilities: Asset Retirement Obligations 33,984 28,571 Postretirement Benefits Other than Pensions 19,237 19,327 Pneumoconiosis Benefits 14,496 15,071 Workers' Compensation 9,293 10,019 Total Other Accrued Liabilities $ 282,008 $ 290,606

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Long-Term Debt	LONG-TERM DEBT: September 30, December 31, Debt: MEDCO Revenue Bonds in Series due September 2025 at 5.75% $ 102,865 $ 102,865 9.00% PEDFA Solid Waste Disposal Revenue Bonds due April 2028 75,000 75,000 Advance Royalty Commitments (8.80% Weighted Average Interest Rate) 5,922 5,922 Other Debt Arrangements 4,399 1,419 Less: Unamortized Debt Issuance Costs (1,331) (1,686) 186,855 183,520 Less: Amounts Due in One Year* (107,519) (1,635) Long-Term Debt $ 79,336 $ 181,885 * Excludes current portion of Finance Lease Obligations of $4,379 and $9,471 at September 30, 2024 and December 31, 2023, respectively. Revolving Credit Facility In November 2017, CONSOL Energy entered into a revolving credit facility with PNC Bank, N.A. (the “Revolving Credit Facility”). The Revolving Credit Facility has been amended several times, the most recent of which occurred in June 2023. This amendment increased the available revolving commitments from $260,000 to $355,000 and provides for the Company's ability to increase the revolving commitments or issue term loans in an additional amount not to exceed $45,000 and up to an aggregate total amount of $400,000. The maturity date of the Revolving Credit Facility is July 18, 2026. Borrowings under the Company's Revolving Credit Facility bear interest at a floating rate that is, at the Company's option, either (i) SOFR plus the applicable SOFR adjustment (as defined therein) depending on the applicable interest period plus an applicable margin or (ii) an alternate base rate plus an applicable margin. The applicable margin for the Revolving Credit Facility depends on the Company's total net leverage ratio and this rate resets quarterly. Obligations under the Revolving Credit Facility are guaranteed by (i) all owners of the PAMC held by the Company, (ii) any other members of the Company’s group that own any portion of the collateral securing the Revolving Credit Facility, and (iii) subject to certain customary exceptions and agreed materiality thresholds, all other existing or future direct or indirect wholly-owned restricted subsidiaries of the Company. The obligations are secured by, subject to certain exceptions (including a limitation of pledges of equity interests in certain subsidiaries and certain thresholds with respect to real property), a first-priority lien on (i) the Company’s interest in the PAMC, (ii) the equity interests in PA Mining Complex LP held by the Company, (iii) the CONSOL Marine Terminal, (iv) the Itmann Mining Complex and (v) the 1.3 billion tons of Greenfield Reserves and Resources. The Revolving Credit Facility contains a number of customary affirmative covenants and a number of negative covenants, including (subject to certain exceptions) limitations on (among other things): indebtedness, liens, investments, acquisitions, dispositions, restricted payments and prepayments of junior indebtedness. The Revolving Credit Facility also includes covenants relating to (i) a maximum first lien gross leverage ratio, (ii) a maximum total net leverage ratio, and (iii) a minimum fixed charge coverage ratio. The maximum first lien gross leverage ratio is calculated as the ratio of Consolidated First Lien Debt to Consolidated EBITDA. Consolidated EBITDA, as used in the covenant calculation, excludes non-cash compensation expenses, non-recurring transaction expenses, extraordinary gains and losses, gains and losses on discontinued operations and gains and losses on debt extinguishment. The maximum total net leverage ratio is calculated as the ratio of Consolidated Indebtedness, minus Cash on Hand, to Consolidated EBITDA. The minimum fixed charge coverage ratio is calculated as the ratio of Consolidated EBITDA to Consolidated Fixed Charges. Consolidated Fixed Charges, as used in the covenant calculation, include cash interest payments, cash payments for income taxes, scheduled debt repayments, Maintenance Capital Expenditures and cash payments related to legacy employee liabilities to the extent in excess of amounts accrued in the calculation of Consolidated EBITDA. Under the Revolving Credit Facility, the maximum first lien gross leverage ratio shall be 1.50 to 1.00, the maximum total net leverage ratio shall be 2.50 to 1.00 and the minimum fixed charge coverage ratio shall be 1.10 to 1.00. The Company's first lien gross leverage ratio was 0.02 to 1.00 at September 30, 2024. The Company's total net leverage ratio was (0.31) to 1.00 at September 30, 2024. The Company's fixed charge coverage ratio was 2.88 to 1.00 at September 30, 2024. The Company was in compliance with all of its financial covenants under the Revolving Credit Facility as of September 30, 2024. At September 30, 2024, the Revolving Credit Facility had no borrowings outstanding and $123,873 of letters of credit outstanding, leaving $231,127 of unused capacity. At December 31, 2023, the Revolving Credit Facility had no borrowings outstanding and $111,186 of letters of credit outstanding, leaving $243,814 of unused capacity. From time to time, CONSOL Energy is required to post financial assurances to satisfy contractual and other requirements generated in the normal course of business. Some of these assurances are posted to comply with federal, state or other government agencies' statutes and regulations. CONSOL Energy sometimes uses letters of credit to satisfy these requirements and these letters of credit reduce the Company's borrowing facility capacity. The SPV is not a guarantor of the Revolving Credit Facility, and the SPV holds the assets pledged to the lender in the securitization facility. The SPV had total assets of $129,143 and $147,918, comprised mainly of $128,901 and $147,612 trade receivables, net, at September 30, 2024 and December 31, 2023, respectively. Net income attributable to the SPV was $528 and $235 for the three months ended September 30, 2024 and 2023, respectively, and $775 and $4,843 for the nine months ended September 30, 2024 and 2023, respectively, which primarily reflected intercompany fees related to purchasing the receivables, which are eliminated in the Consolidated Financial Statements contained within this Quarterly Report on Form 10-Q. During the nine months ended September 30, 2024 and 2023, there were no borrowings or payments under the accounts receivable securitization facility. See Note 9 - Accounts Receivable Securitization for additional information. PEDFA Bonds In April 2021, CONSOL Energy borrowed the proceeds received from the sale of tax-exempt bonds issued by the Pennsylvania Economic Development Financing Authority (“PEDFA”) in an aggregate principal amount of $75,000 (the “PEDFA Bonds”). The PEDFA Bonds bear interest at a fixed rate of 9.00% for an initial term of seven years. The PEDFA Bonds mature on April 1, 2051 but are subject to mandatory purchase by the Company on April 13, 2028, at the expiration of the initial term rate period. The PEDFA Bonds were issued pursuant to an indenture (the “PEDFA Indenture”) dated as of April 1, 2021, by and between PEDFA and Wilmington Trust, N.A., a national banking association, as trustee (the “PEDFA Notes Trustee”). PEDFA made a loan of the proceeds of the PEDFA Bonds to the Company pursuant to a Loan Agreement (the “Loan Agreement”) dated as of April 1, 2021 between PEDFA and the Company. Under the terms of the Loan Agreement, the Company agreed to make all payments of principal, interest and other amounts at any time due on the PEDFA Bonds or under the PEDFA Indenture. PEDFA assigned its rights as lender under the Loan Agreement, excluding certain reserved rights, to the PEDFA Notes Trustee. Certain subsidiaries of the Company (the “PEDFA Notes Guarantors”) executed a Guaranty Agreement (the “Guaranty”) dated as of April 1, 2021 in favor of the PEDFA Notes Trustee, guarantying the obligations of the Company under the Loan Agreement to pay the PEDFA Bonds when and as due. The obligations of the Company under the Loan Agreement and of the PEDFA Notes Guarantors under the Guaranty are secured by second priority liens on substantially all of the assets of the Company and the PEDFA Notes Guarantors. The Loan Agreement and Guaranty incorporate by reference covenants in the Indenture, dated as of November 13, 2017 by and between the Company and UMB Bank, N.A., a national banking association, as trustee and collateral trustee, under which the 11.00% Senior Secured Second Lien Notes due 2025 (the “Second Lien Notes”) were issued, including covenants that limited the ability of the Company and certain subsidiaries of the Company, as guarantors, to (i) incur, assume or guarantee additional indebtedness or issue preferred stock; (ii) create liens to secure indebtedness; (iii) declare or pay dividends on the Company’s common stock, redeem stock or make other distributions to the Company’s stockholders; (iv) make investments; (v) pay or make dividends, loans or other asset transfers from the Company’s restricted subsidiaries; (vi) merge or consolidate, or sell, transfer, lease or dispose of substantially all of the Company’s assets; (vii) sell or otherwise dispose of certain assets, including equity interests in subsidiaries; (viii) enter into transactions with affiliates; and (ix) create unrestricted subsidiaries. These covenants were subject to important exceptions and qualifications. The Company started a capital construction project on the PAMC coarse refuse disposal area in 2017, which is now funded, in part, by the proceeds from the PEDFA Bonds. The Company expects to expend these funds as qualified work is completed. The Company utilized restricted cash in the amount of $5,206 and $12,247 during the three and nine months ended September 30, 2024, respectively, and $8,442 and $16,313 during the three and nine months ended September 30, 2023, respectively, for qualified expenses. Additionally, the Company had $261 and $12,177 in restricted cash at September 30, 2024 and December 31, 2023, respectively, associated with this financing that will be used to fund future spending on the coarse refuse disposal area.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	9 Months Ended
	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	COMMITMENTS AND CONTINGENT LIABILITIES: The Company is subject to various lawsuits and claims with respect to such matters as personal injury, wrongful death, damage to property, exposure to hazardous substances, governmental regulations including environmental remediation, employment and contract disputes and other claims and actions arising out of the normal course of business. The Company accrues the estimated loss for these lawsuits and claims when the loss is probable and reasonably estimable. The Company’s estimated accruals related to these pending claims, individually and in the aggregate, are immaterial to the financial position, results of operations or cash flows of the Company as of September 30, 2024. It is possible that the aggregate loss in the future with respect to these lawsuits and claims could ultimately be material to the Company’s financial position, results of operations or cash flows; however, such amounts cannot be reasonably estimated. The amount claimed against the Company as of September 30, 2024 is disclosed below when an amount is expressly stated in the lawsuit or claim, which is not often the case. Fitzwater and Casey Litigation: In 2016, three nonunion retired coal miners sued Fola Coal Company LLC, Consolidation Coal Company (“CCC”) and CONSOL of Kentucky Inc. (“COK”) (as well as the Company's former parent) in the U.S. District Court for the Southern District of West Virginia alleging ERISA violations in the termination of retiree health care benefits (the “Fitzwater Lawsuit”). The Plaintiffs contend they relied to their detriment on oral statements and promises of “lifetime health benefits” allegedly made by various members of management during Plaintiffs’ employment and that they were allegedly denied access to Summary Plan Documents that clearly reserved to the Company the right to modify or terminate the Retiree Health and Welfare Plan subject to Plaintiffs’ claims. Pursuant to Plaintiffs’ amended complaint filed on April 24, 2017, Plaintiffs request that retiree health benefits be reinstated and seek to represent a class of all nonunion retirees who were associated with AMVEST and COK areas of operation. On August 23, 2017, a class action lawsuit was filed on behalf of two nonunion retired coal miners against CCC, COK, CONSOL Buchanan Mining Co., LLC and Kurt Salvatori, the Company's Chief Administrative Officer, in the U.S. District Court for the Southern District of West Virginia alleging similar allegations (the “Casey Lawsuit”). On December 1, 2017, the trial court judge in the Fitzwater Lawsuit consolidated the Fitzwater Lawsuit with the Casey Lawsuit (collectively, the “Fitzwater Litigation”). The complaint was amended on March 1, 2018 to add new plaintiffs, add defendant CONSOL Pennsylvania Coal Company LLC and eliminate defendant CONSOL Buchanan Mining Co., LLC in an attempt to expand the class of retirees. On October 15, 2019, Plaintiffs’ supplemental motion for class certification was denied on all counts. On July 15, 2020, Plaintiffs filed an interlocutory appeal with the Fourth Circuit Court of Appeals on the Order denying class certification. The Fourth Circuit denied Plaintiffs' appeal on August 14, 2020. The District Court held a trial in February 2021 and issued a ruling on September 30, 2024 in favor of two of the eight plaintiffs. On October 15, 2024, Plaintiffs filed a Notice of Appeal of the ruling. As a result of this ruling, the Company has accrued a nominal amount as of September 30, 2024, which is included in Other Accrued Liabilities in the accompanying Consolidated Balance Sheet. United Mine Workers of America 1992 Benefit Plan Litigation: In 2013, Murray Energy and its subsidiaries (“Murray”) entered into a stock purchase agreement (the “Murray sale agreement”) with the Company's former parent pursuant to which Murray acquired the stock of CCC and certain subsidiaries and certain other assets and liabilities. At the time of sale, the liabilities included certain retiree medical liabilities under the Coal Industry Retiree Health Benefit Act of 1992 (“Coal Act”) and certain federal black lung liabilities under the Black Lung Benefits Act (“BLBA”). Based upon information available, the Company estimates that the annual servicing costs of these liabilities are approximately $10 million to $20 million per year for the next ten years. The annual servicing cost would decline each year since the beneficiaries of the Coal Act consist principally of miners who retired prior to 1994. Murray filed for Chapter 11 bankruptcy in October 2019. As part of the bankruptcy proceedings, Murray unilaterally entered into a settlement with the United Mine Workers of America 1992 Benefit Plan (the “1992 Benefit Plan”) to transfer retirees in the Murray Energy Section 9711 Plan to the 1992 Benefit Plan. This was approved by the bankruptcy court on April 30, 2020. On May 2, 2020, the 1992 Benefit Plan filed an action in the United States District Court for the District of Columbia asking the court to make a determination whether the Company's former parent or the Company has any continuing retiree medical liabilities under the Coal Act (the “1992 Plan Lawsuit”). The Murray sale agreement includes indemnification by Murray with respect to the Coal Act and BLBA liabilities. In addition, the Company had agreed to indemnify its former parent relative to certain pre-separation liabilities. As of September 16, 2020, the Company entered into a settlement agreement with Murray and withdrew its claims in bankruptcy. On September 11, 2020, the Defendants in the 1992 Plan Lawsuit filed a Motion to Dismiss Plaintiffs' Second Amended Complaint which was denied by the Court on March 29, 2022. The Company will continue to vigorously defend any claims that attempt to transfer any of such liabilities directly or indirectly to the Company, including raising all applicable defenses against the 1992 Benefit Plan’s suit. With respect to this lawsuit, while a loss is reasonably possible, it is not probable and, as a result, no accrual has been recorded. United Mine Workers of America 1974 Pension Plan Litigation: On March 7, 2024, the Company's former parent filed a complaint (the “Indemnification Lawsuit”) in the Superior Court of the State of Delaware against the Company that stated that the Company's former parent had settled potential claims asserted by the United Mine Workers of America 1974 Pension Plan (“1974 Plan”) against the Company's former parent for a total settlement amount of $75,000 to be paid over a five year period, in exchange for a full release by the 1974 Plan of the Company's former parent, the Company and their affiliates. In the Indemnification Lawsuit, the Company's former parent is seeking (i) indemnification from the Company under the 2017 Separation and Distribution Agreement between the Company and its former parent for the $75,000 settlement plus the Company's former parent's alleged legal expenses related to its settlement with the 1974 Plan, (ii) the costs and expenses the Company's former parent incurs in connection with the Indemnification Lawsuit, (iii) pre- and post-judgment interest, (iv) punitive damages and (v) any other relief the court deems just and proper. On May 9, 2024, the Company's former parent filed a Motion for Summary Judgment while the Company filed a brief in opposition of the motion on June 27, 2024, with briefing concluding on July 19, 2024. Oral arguments were held in the third quarter of 2024. The Court has not yet ruled on this motion. The Company does not believe that it has any obligations to indemnify its former parent under the Separation and Distribution Agreement with respect to its former parent's settlement with the 1974 Plan and intends to vigorously defend itself against all claims asserted against it in the Indemnification Lawsuit. With respect to this lawsuit, while a loss is reasonably possible, it is not probable and, as a result, no accrual has been recorded. The Company and various subsidiaries are defendants in certain other legal proceedings. In the opinion of management, based upon an investigation of these matters and discussion with legal counsel, the ultimate outcome of such other legal proceedings, individually and in the aggregate, is not expected to have a material adverse effect on the Company’s financial position, results of operations or liquidity. The following is a summary, as of September 30, 2024, of the financial guarantees, unconditional purchase obligations and letters of credit to certain third parties. Employee-related financial guarantees have primarily been provided to support the 1992 Benefit Plan and federal black lung and various state workers' compensation self-insurance programs. Environmental financial guarantees have primarily been provided to support various performance bonds related to reclamation and other environmental issues. Other financial guarantees have been extended to support sales contracts, insurance policies, surety indemnity agreements, legal matters, full and timely payments of mining equipment leases, and various other items necessary in the normal course of business. These amounts represent the maximum potential of total future payments that the Company could be required to make under these instruments. Certain letters of credit included in the table below were issued against other commitments included in this table. These amounts have not been reduced for potential recoveries under recourse or collateralization provisions. Generally, recoveries under reclamation bonds would be limited to the extent of the work performed at the time of the default. No amounts related to these commitments are recorded as liabilities in the financial statements. The Company's management believes that these commitments will not have a material adverse effect on the Company's financial condition. Amount of Commitment Expiration per Period Total Amounts Committed Less Than 1 Year 1-3 Years 3-5 Years Beyond 5 Years Letters of Credit: Employee-Related $ 47,446 $ 29,635 $ 17,811 $ — $ — Environmental 398 398 — — — Other 131,006 117,606 13,400 — — Total Letters of Credit $ 178,850 $ 147,639 $ 31,211 $ — $ — Surety Bonds: Employee-Related $ 80,210 $ 80,210 $ — $ — $ — Environmental 528,597 528,597 — — — Other 4,071 4,071 — — — Total Surety Bonds $ 612,878 $ 612,878 $ — $ — $ — The Company regularly evaluates the likelihood of default for all guarantees based on an expected loss analysis and records the fair value, if any, of its guarantees as an obligation in the Consolidated Financial Statements.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	FAIR VALUE OF FINANCIAL INSTRUMENTS: CONSOL Energy determines the fair value of assets and liabilities based on the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants. The fair values are based on assumptions that market participants would use when pricing an asset or liability, including assumptions about risk and the risks inherent in valuation techniques and the inputs to valuations. The fair value hierarchy is based on whether the inputs to valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources (including SOFR-based discount rates and U.S. Treasury-based rates), while unobservable inputs reflect the Company’s own assumptions of what market participants would use. The fair value hierarchy includes three levels of inputs that may be used to measure fair value as described below. Level One - Quoted prices for identical instruments in active markets. The Company's Level 1 assets include marketable debt securities, primarily highly liquid U.S. Treasury securities. Level Two - The fair value of the assets and liabilities included in Level 2 are based on standard industry income approach models that use significant observable inputs, including SOFR-based discount rates and U.S. Treasury-based rates. Level Three - Unobservable inputs significant to the fair value measurement supported by little or no market activity. In those cases when the inputs used to measure fair value meet the definition of more than one level of the fair value hierarchy, the lowest level input that is significant to the fair value measurement in its totality determines the applicable level in the fair value hierarchy. The financial instruments measured at fair value on a recurring basis are summarized below: Fair Value Measurements at Fair Value Measurements at September 30, 2024 December 31, 2023 Description Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 U.S. Treasury Securities $ 84,333 $ — $ — $ 81,932 $ — $ — The following methods and assumptions were used to estimate the fair value for which the fair value option was not elected: Long-term debt: The fair value of long-term debt is measured using unadjusted quoted market prices or estimated using discounted cash flow analyses. The discounted cash flow analyses are based on current market rates for instruments with similar cash flows. The carrying amounts and fair values of financial instruments for which the fair value option was not elected are as follows: September 30, 2024 December 31, 2023 Carrying Fair Carrying Fair Long-Term Debt (Excluding Debt Issuance Costs) $ 188,186 $ 202,560 $ 185,206 $ 199,591 Certain of the Company’s debt is actively traded on a public market and, as a result, constitutes Level 1 fair value measurements. The portion of the Company’s debt obligations that is not actively traded is valued through reference to the applicable underlying benchmark rate and, as a result, constitutes Level 2 fair value measurements.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2024
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION: The Company reports segment information based on the “management” approach. The management approach designates the internal reporting used by management to make decisions on and assess performance of the Company’s reportable segments. CONSOL Energy presently consists of two reportable segments, the PAMC and the CONSOL Marine Terminal. The PAMC includes the Bailey Mine, the Enlow Fork Mine, the Harvey Mine and a centralized preparation plant. The PAMC segment’s principal activities include the mining, preparation and marketing of bituminous coal, sold primarily to industrial end-users, power generators and metallurgical end-users. The CONSOL Marine Terminal provides coal export terminal services through the Port of Baltimore. General and administrative costs are allocated to the Company’s segments based on a percentage of resources utilized, a percentage of total revenue and a percentage of total projected capital expenditures. CONSOL Energy’s Other segment includes revenue and expenses from various corporate and diversified business activities that are not allocated to the PAMC or the CONSOL Marine Terminal segments. The diversified business activities currently include the Itmann Mining Complex, carbon products and materials businesses led by CONSOL Innovations LLC, the Greenfield Reserves and Resources, closed mine activities, other income, gain on asset sales related to non-core assets, and gain/loss on debt extinguishment. Additionally, interest expense and income taxes, as well as various other non-operated activities, none of which are individually significant to the Company, are also reflected in CONSOL Energy's Other segment and are not allocated to the PAMC and CONSOL Marine Terminal segments. The Company evaluates the performance of its segments utilizing Adjusted EBITDA and various productivity metrics. Adjusted EBITDA measures the operating performance of the Company's segments and is used to allocate resources to the Company's segments. Reportable segment results for the three months ended September 30, 2024 are: PAMC CONSOL Marine Terminal Other, Corporate and Eliminations Consolidated Coal Revenue $ 439,730 $ — $ 22,759 $ 462,489 Terminal Revenue — 23,740 — 23,740 Freight Revenue 62,219 — 1,187 63,406 Other Revenue — — 3,797 3,797 Total Revenue from Contracts with Customers $ 501,949 $ 23,740 $ 27,743 $ 553,432 Adjusted EBITDA $ 173,906 $ 15,917 $ (10,645) $ 179,178 Segment Assets $ 1,778,921 $ 87,602 $ 957,594 $ 2,824,117 Depreciation, Depletion and Amortization $ 44,663 $ 1,342 $ 7,324 $ 53,329 Capital Expenditures $ 30,743 $ 2,805 $ 5,840 $ 39,388 Reportable segment results for the three months ended September 30, 2023 are: PAMC CONSOL Marine Terminal Other, Corporate and Eliminations Consolidated Coal Revenue $ 431,090 $ — $ 18,528 $ 449,618 Terminal Revenue — 22,676 — 22,676 Freight Revenue 64,507 — 3,865 68,372 Total Revenue from Contracts with Customers $ 495,597 $ 22,676 $ 22,393 $ 540,666 Adjusted EBITDA $ 183,790 $ 14,853 $ (13,135) $ 185,508 Segment Assets $ 1,616,224 $ 83,422 $ 959,869 $ 2,659,515 Depreciation, Depletion and Amortization $ 50,663 $ 1,181 $ 6,948 $ 58,792 Capital Expenditures $ 35,404 $ 2,630 $ 3,633 $ 41,667 Reportable segment results for the nine months ended September 30, 2024 are: PAMC CONSOL Marine Terminal Other, Corporate and Eliminations Consolidated Coal Revenue $ 1,240,359 $ — $ 79,379 $ 1,319,738 Terminal Revenue — 60,288 — 60,288 Freight Revenue 192,569 — 6,319 198,888 Other Revenue — — 11,927 11,927 Total Revenue from Contracts with Customers $ 1,432,928 $ 60,288 $ 97,625 $ 1,590,841 Adjusted EBITDA $ 481,685 $ 37,925 $ (34,141) $ 485,469 Segment Assets $ 1,778,921 $ 87,602 $ 957,594 $ 2,824,117 Depreciation, Depletion and Amortization $ 136,607 $ 3,816 $ 24,750 $ 165,173 Capital Expenditures $ 114,744 $ 7,605 $ 14,799 $ 137,148 Reportable segment results for the nine months ended September 30, 2023 are: PAMC CONSOL Marine Terminal Other, Corporate and Eliminations Consolidated Coal Revenue $ 1,515,603 $ — $ 58,493 $ 1,574,096 Terminal Revenue — 80,755 — 80,755 Freight Revenue 206,725 — 10,710 217,435 Total Revenue from Contracts with Customers $ 1,722,328 $ 80,755 $ 69,203 $ 1,872,286 Adjusted EBITDA $ 784,819 $ 59,324 $ (36,385) $ 807,758 Segment Assets $ 1,616,224 $ 83,422 $ 959,869 $ 2,659,515 Depreciation, Depletion and Amortization $ 152,302 $ 3,513 $ 27,056 $ 182,871 Capital Expenditures $ 99,706 $ 4,329 $ 13,714 $ 117,749 For the three and nine months ended September 30, 2024 and 2023, the Company's reportable segments had revenues from the following customers, each comprising over 10% of the Company's total sales: Three Months Ended Nine Months Ended 2024 2023 2024 2023 Customer A $ 67,016 $ 69,322 $ 176,844 $ 220,726 Customer B $ 63,473 $ 72,335 $ 172,394 $ 207,746 Reconciliation of Segment Information to Consolidated Amounts: Three Months Ended September 30, 2024 PAMC CONSOL Marine Terminal Other Consolidated Net Income (Loss) $ 129,393 $ 12,966 $ (46,727) $ 95,632 Income Tax Expense — — 17,539 17,539 Interest Expense — 1,516 3,148 4,664 Interest Income (1,795) — (3,221) (5,016) Depreciation, Depletion and Amortization 44,663 1,342 7,324 53,329 Stock-Based Compensation 1,645 93 313 2,051 Merger-Related Expenses — — 10,979 10,979 Adjusted EBITDA $ 173,906 $ 15,917 $ (10,645) $ 179,178 Three Months Ended September 30, 2023 PAMC CONSOL Marine Terminal Other Consolidated Net Income (Loss) $ 132,442 $ 12,098 $ (43,815) $ 100,725 Income Tax Expense — — 21,032 21,032 Interest Expense — 1,524 5,121 6,645 Interest Income (723) — (3,301) (4,024) Depreciation, Depletion and Amortization 50,663 1,181 6,948 58,792 Stock-Based Compensation 1,408 50 218 1,676 Loss on Debt Extinguishment — — 662 662 Adjusted EBITDA $ 183,790 $ 14,853 $ (13,135) $ 185,508 Nine Months Ended September 30, 2024 PAMC CONSOL Marine Terminal Other Consolidated Net Income (Loss) $ 341,859 $ 29,118 $ (115,393) $ 255,584 Income Tax Expense — — 43,409 43,409 Interest Expense — 4,555 10,508 15,063 Interest Income (4,408) — (9,737) (14,145) Depreciation, Depletion and Amortization 136,607 3,816 24,750 165,173 Stock-Based Compensation 7,627 436 1,343 9,406 Merger-Related Expenses — — 10,979 10,979 Adjusted EBITDA $ 481,685 $ 37,925 $ (34,141) $ 485,469 Nine Months Ended September 30, 2023 PAMC CONSOL Marine Terminal Other Consolidated Net Income (Loss) $ 627,053 $ 50,981 $ (179,209) $ 498,825 Income Tax Expense — — 100,199 100,199 Interest Expense — 4,576 19,503 24,079 Interest Income (1,644) — (7,758) (9,402) Depreciation, Depletion and Amortization 152,302 3,513 27,056 182,871 Stock-Based Compensation 7,108 254 1,099 8,461 Loss on Debt Extinguishment — — 2,725 2,725 Adjusted EBITDA $ 784,819 $ 59,324 $ (36,385) $ 807,758

Stock and Debt Repurchases

Stock and Debt Repurchases	9 Months Ended
	Sep. 30, 2024
Equity [Abstract]
Stock and Debt Repurchases	STOCK AND DEBT REPURCHASES: In December 2017, CONSOL Energy’s Board of Directors approved a program to repurchase, from time to time, the Company's outstanding shares of common stock or its Second Lien Notes. Since the program's inception, the Company's Board of Directors has subsequently amended the program several times. The most recent amendment occurred in April 2023, in which the aggregate limit of the Company's repurchase authority was raised to $1,000,000. The program terminates on December 31, 2024. The Company has suspended share repurchases until the Merger is completed (see Note 17 for additional information). Under the terms of the program, CONSOL Energy is permitted to make repurchases in the open market, in privately negotiated transactions, accelerated repurchase programs or in structured share repurchase programs. CONSOL Energy is also authorized to enter into one or more 10b5-1 plans with respect to any of the repurchases. Any repurchases of common stock or notes are to be funded from available cash on hand or short-term borrowings. The program does not obligate CONSOL Energy to acquire any particular amount of its common stock or notes, and the program can be modified or suspended at any time at the Company’s discretion. The program is conducted in compliance with applicable legal requirements imposed by any credit agreement, receivables purchase agreement or indenture.

PROPOSED MERGER

PROPOSED MERGER	9 Months Ended
	Sep. 30, 2024
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Proposed Merger	PROPOSED MERGER On August 20, 2024, the Company, Mountain Range Merger Sub Inc., a wholly-owned subsidiary of the Company (“Merger Sub”), and Arch Resources, Inc. (“Arch”) entered into an agreement and plan of merger (the “Merger Agreement”). Upon the terms and subject to the conditions set forth in the Merger Agreement, Merger Sub will merge with and into Arch (the “Merger”), with Arch thereafter being a wholly-owned subsidiary of the Company. Under the terms of the Merger Agreement, each share of Class A common stock, par value $0.01 per share, of Arch (the “Arch Class A common stock”) and Class B common stock, par value $0.01 per share, of Arch (the “Arch Class B common stock” and together with the Arch Class A common stock, the “Arch common stock”), that is issued and outstanding immediately prior to the effective time of the Merger (other than shares of Arch common stock held by Arch as treasury shares or shares of Arch common stock held by the Company or Merger Sub immediately prior to the effective time of the Merger and in each case, not held on behalf of third parties and shares of Arch common stock that are owned by any subsidiary of Arch or the Company other than Merger Sub) will be converted automatically into the right to receive, without interest, 1.326 fully paid and non-assessable shares of common stock, par value $0.01 per share, of the Company (“CONSOL common stock”) (with cash in lieu of fractional shares). The Merger Agreement imposes certain restrictions on the conduct of the business of the Company until the closing, such as a requirement to operate in the ordinary course of business and limitations on, among other things, dividends, stock repurchases and debt repurchases, subject, in each case, to certain exceptions. The Merger is expected to close by the end of the first quarter of 2025, subject to the satisfaction or waiver of certain customary closing conditions, including approval by the Company's and Arch's stockholders. The Merger Agreement contains certain termination rights for both the Company and Arch. In the event of a termination of the Merger Agreement under certain specified circumstances, the Company or Arch may be required to pay the other party a termination fee of $82 million or an expense reimbursement of up to $23.5 million.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2024
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS On October 2, 2024, CONSOL Mining Company LLC, Helvetia Coal Company LLC and Laurel Run Mining Company LLC voluntarily entered into a Post-Mining Discharge Treatment Trust Consent Order and Agreement (“CO&A”) with the Pennsylvania Department of Environmental Protection. The CO&A serves as an approved alternative financial assurance mechanism associated with the Company's perpetual water treatment obligations located in Pennsylvania and establishes a Global Water Treatment Trust Fund (“WTTF”). The WTTF is a long-term funding mechanism with an initial value of $74.2 million funded by a combination of cash (approximately $12 million) and surety bonds (approximately $62 million) pledged to the WTTF to fund these obligations over time, reducing the Company's exposure to surety bonds and their collateral requirements. The Company has agreed to a minimum $2 million annual contribution into the WTTF, while reserving the option to pre-pay into the WTTF at any time and with no cap on the pre-payment amount. On November 5, 2024, CONSOL Energy announced a $0.25/share dividend in an aggregate amount of approximately $7 million, payable on November 26, 2024 to all stockholders of record as of November 15, 2024.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net Income	$ 95,632	$ 58,061	$ 101,891	$ 100,725	$ 167,723	$ 230,377	$ 255,584	$ 498,825

Insider Trading Arrangements

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

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States (“GAAP”) for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three and nine months ended September 30, 2024 are not necessarily indicative of the results that may be expected for future periods. The Consolidated Balance Sheet at December 31, 2023 has been derived from the Audited Consolidated Financial Statements at that date but does not include all disclosures required by GAAP. This Form 10-Q report should be read in conjunction with CONSOL Energy Inc.'s Annual Report on Form 10-K for the year ended December 31, 2023. All dollar amounts discussed in these Notes to Consolidated Financial Statements are in thousands of U.S. dollars, except for share and per share amounts, and unless otherwise indicated.
Basis of Consolidation	Basis of Consolidation The Consolidated Financial Statements include the accounts of CONSOL Energy Inc. and its wholly-owned and majority-owned and/or controlled subsidiaries. All significant intercompany transactions and accounts have been eliminated in consolidation.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09 Income Taxes (Topic 740). The amendments in this update address investor requests for more transparency about income tax information through improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. The amendments in this update require that public business entities on an annual basis (1) disclose specific categories in the rate reconciliation, (2) provide additional information for reconciling items that meet a quantitative threshold (if the effect of those reconciling items is equal to or greater than five percent of the amount computed by multiplying pretax income (or loss) by the applicable statutory income tax rate), (3) disclose the amount of income taxes paid (net of refunds received) disaggregated by federal (national), state, and foreign taxes, (4) disclose the amount of income taxes paid (net of refunds received) disaggregated by individual jurisdictions in which income taxes paid (net of refunds received) is equal to or greater than five percent of total income taxes paid (net of refunds received), (5) disclose income (or loss) from continuing operations before income tax expense (or benefit) disaggregated between domestic and foreign, and (6) disclose income tax expense (or benefit) from continuing operations disaggregated by federal (national), state, and foreign. The amendments in this update are effective for annual periods beginning after December 15, 2024, and should be applied prospectively. Management is currently evaluating the impact of this guidance, but with the exception of the increased disclosures summarized above, does not expect this update to have a material impact on the Company's financial statements. In November 2023, the FASB issued ASU 2023-07 Segment Reporting (Topic 280). The amendments in this update improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analyses. Topic 280 requires a public entity to report a measure of segment profit or loss that the chief operating decision maker uses to assess segment performance and make decisions about allocating resources. Topic 280 also requires other specified segment items and amounts, such as depreciation, amortization, and depletion expense, to be disclosed under certain circumstances. The amendments in this update do not change or remove those disclosure requirements. The amendments in this update also do not change how a public entity identifies its operating segments, aggregates those operating segments, or applies the quantitative thresholds to determine its reportable segments. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024 and should be applied retrospectively. Management is currently evaluating the impact of this guidance, but with the exception of the incremental disclosures related to segment expenses summarized above, does not expect this update to have a material impact on the Company's financial statements. In August 2023, the FASB issued ASU 2023-05 - Business Combinations—Joint Venture Formations (Subtopic 805-60). The amendments in this update address the accounting for contributions made to a joint venture, upon formation, in a joint venture's separate financial statements. The objectives of the amendments are to (1) provide decision-useful information to investors and other allocators of capital in a joint venture's financial statements and (2) reduce diversity in practice. The amendments in this update do not amend the definition of a joint venture, the accounting by an equity method investor for its investment in a joint venture, or the accounting by a joint venture for contributions received after its formation. The amendments in this update are effective prospectively for all joint venture formations with a formation date on or after January 1, 2025. Existing joint ventures may elect to apply the guidance retrospectively. Management is currently evaluating the impact of this guidance, but does not expect this update to have a material impact on the Company's financial statements.
Earnings per Share	Earnings per Share

Basis of Presentation (Tables)

Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	The table below sets forth the share-based awards that have been excluded from the computation of diluted earnings per share because their effect would be anti-dilutive: Three Months Ended Nine Months Ended 2024 2023 2024 2023 Anti-Dilutive Restricted Stock Units 377 — 458 1,031 Anti-Dilutive Performance Share Units — — — — 377 — 458 1,031
Schedule of Earnings Per Share, Basic and Diluted	The computations for basic and dilutive earnings per share are as follows: Dollars in thousands, except share and per share data Three Months Ended Nine Months Ended 2024 2023 2024 2023 Numerator: Net Income $ 95,632 $ 100,725 $ 255,584 $ 498,825 Denominator: Weighted-average shares of common stock outstanding 29,580,649 31,928,295 29,705,627 33,330,892 Effect of dilutive shares 121,406 464,394 118,962 479,628 Weighted-average diluted shares of common stock outstanding 29,702,055 32,392,689 29,824,589 33,810,520 Earnings per Share: Basic $ 3.23 $ 3.15 $ 8.60 $ 14.97 Dilutive $ 3.22 $ 3.11 $ 8.57 $ 14.75

Revenue From Contracts With C_2

Revenue From Contracts With Customers (Tables)	9 Months Ended
	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	The following tables disaggregate CONSOL Energy's revenue from contracts with customers by product type and market: Three Months Ended September 30, 2024 Domestic Export Total Power Generation $ 163,769 $ 63,027 $ 226,796 Industrial 2,485 148,980 151,465 Metallurgical 8,200 76,028 84,228 Total Coal Revenue 174,454 288,035 462,489 Terminal Revenue 23,740 Freight Revenue 63,406 Other Revenue 3,797 Total Revenue from Contracts with Customers $ 553,432 Three Months Ended September 30, 2023 Domestic Export Total Power Generation $ 169,143 $ 37,134 $ 206,277 Industrial 11,076 169,709 180,785 Metallurgical — 62,556 62,556 Total Coal Revenue 180,219 269,399 449,618 Terminal Revenue 22,676 Freight Revenue 68,372 Total Revenue from Contracts with Customers $ 540,666 Nine Months Ended September 30, 2024 Domestic Export Total Power Generation $ 515,159 $ 156,013 $ 671,172 Industrial 13,636 420,570 434,206 Metallurgical 31,222 183,138 214,360 Total Coal Revenue 560,017 759,721 1,319,738 Terminal Revenue 60,288 Freight Revenue 198,888 Other Revenue 11,927 Total Revenue from Contracts with Customers $ 1,590,841 Nine Months Ended September 30, 2023 Domestic Export Total Power Generation $ 476,598 $ 270,736 $ 747,334 Industrial 29,814 560,382 590,196 Metallurgical 10,627 225,939 236,566 Total Coal Revenue 517,039 1,057,057 1,574,096 Terminal Revenue 80,755 Freight Revenue 217,435 Total Revenue from Contracts with Customers $ 1,872,286

Components of Pension and Oth_2

Components of Pension and Other Post-employment Benefit (OPEB) Plans Net Periodic Benefit Costs (Tables)	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Schedule of Defined Benefit Plans Disclosures	The components of Net Periodic Benefit Cost (Credit) are as follows: Pension Benefits Other Post-Employment Benefits Three Months Ended Nine Months Ended Three Months Ended Nine Months Ended 2024 2023 2024 2023 2024 2023 2024 2023 Service Cost $ 302 $ 304 $ 906 $ 913 $ — $ — $ — $ — Interest Cost 6,431 6,756 19,293 20,270 2,758 3,261 8,274 9,783 Expected Return on Plan Assets (7,991) (9,867) (23,973) (29,602) — — — — Amortization of Prior Service Credits — — — — (601) (601) (1,804) (1,804) Amortization of Actuarial Loss (Gain) 1,567 185 4,699 555 (70) — (209) — Net Periodic Benefit Cost (Credit) $ 309 ($2,622) $ 925 ($7,864) $ 2,087 $ 2,660 $ 6,261 $ 7,979

Components of Coal Workers' P_2

Components of Coal Workers' Pneumoconiosis (CWP) and Workers' Compensation Net Periodic Benefit Costs (Tables)	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Schedule of Changes in Accumulated Postemployment Benefit Obligations	The components of Net Periodic Benefit Cost are as follows: CWP Workers' Compensation Three Months Ended Nine Months Ended Three Months Ended Nine Months Ended 2024 2023 2024 2023 2024 2023 2024 2023 Service Cost $ 746 $ 578 $ 2,239 $ 1,734 $ 1,465 $ 1,400 $ 4,393 $ 4,198 Interest Cost 2,066 2,071 6,198 6,214 572 628 1,717 1,885 Amortization of Actuarial Loss (Gain) 109 (261) 326 (784) (540) (512) (1,620) (1,537) State Administrative Fees and Insurance Bond Premiums — — — — 464 471 1,393 1,482 Net Periodic Benefit Cost $ 2,921 $ 2,388 $ 8,763 $ 7,164 $ 1,961 $ 1,987 $ 5,883 $ 6,028

Cash and Cash Equivalents and_2

Cash and Cash Equivalents and Short-Term Investments (Tables)	9 Months Ended
	Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Schedule of Cash, Cash Equivalents and Investments	The following table disaggregates CONSOL Energy's cash, cash equivalents and restricted cash, which reconciles to the total shown on the Consolidated Statements of Cash Flows: September 30, 2024 2023 Cash and Cash Equivalents $ 331,674 $ 167,586 Restricted Cash - Current (1) 37,941 46,313 Restricted Cash - Non-current — 2,095 Cash and Cash Equivalents and Restricted Cash $ 369,615 $ 215,994
Schedule of Debt Securities, Available-for-Sale	The Company's investments in available-for-sale securities are as follows: September 30, 2024 Gross Unrealized Amortized Cost Allowance for Credit Losses Gains Losses Fair Value U.S. Treasury Securities $ 84,107 $ — $ 226 $ — $ 84,333 December 31, 2023 Gross Unrealized Amortized Cost Allowance for Credit Losses Gains Losses Fair Value U.S. Treasury Securities $ 81,829 $ — $ 103 $ — $ 81,932

Credit Losses (Tables)

Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2024
Credit Loss [Abstract]
Schedule of Accounts Receivable, Allowance for Credit Loss	The following table provides a roll-forward of the allowance for credit losses that is deducted from the amortized cost basis of accounts receivable and other non-trade contractual arrangements to present the net amount expected to be collected. Trade Receivables Other Non-Trade Contractual Beginning Balance, December 31, 2023 $ 466 $ 7,504 Provision for expected credit losses (131) (54) Ending Balance, September 30, 2024 $ 335 $ 7,450

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2024
Inventory Disclosure [Abstract]
Schedule of Inventory, Current	Inventory components consist of the following: September 30, December 31, Coal $ 41,578 $ 17,128 Supplies 75,054 71,026 Total Inventories $ 116,632 $ 88,154

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	9 Months Ended
	Sep. 30, 2024
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	Property, plant and equipment consists of the following: September 30, December 31, Plant and Equipment $ 3,584,192 $ 3,458,655 Coal Properties and Surface Lands 910,310 906,343 Airshafts 511,482 492,806 Mine Development 366,260 366,260 Advance Mining Royalties 329,470 328,340 Total Property, Plant and Equipment 5,701,714 5,552,404 Less: Accumulated Depreciation, Depletion and Amortization 3,792,369 3,649,281 Total Property, Plant and Equipment - Net $ 1,909,345 $ 1,903,123

Other Accrued Liabilities (Tabl

Other Accrued Liabilities (Tables)	9 Months Ended
	Sep. 30, 2024
Other Liabilities Disclosure [Abstract]
Schedule of Accrued Liabilities	September 30, December 31, Subsidence Liability $ 112,678 $ 105,322 Accrued Compensation and Benefits 48,908 73,763 Accrued Other Taxes 10,092 12,276 Accrued Income Taxes 9,569 — Deferred Revenue 3,775 9,517 Accrued Interest 3,125 6,283 Other 16,851 10,457 Current Portion of Long-Term Liabilities: Asset Retirement Obligations 33,984 28,571 Postretirement Benefits Other than Pensions 19,237 19,327 Pneumoconiosis Benefits 14,496 15,071 Workers' Compensation 9,293 10,019 Total Other Accrued Liabilities $ 282,008 $ 290,606

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Schedule of Long-Term Debt Instruments	September 30, December 31, Debt: MEDCO Revenue Bonds in Series due September 2025 at 5.75% $ 102,865 $ 102,865 9.00% PEDFA Solid Waste Disposal Revenue Bonds due April 2028 75,000 75,000 Advance Royalty Commitments (8.80% Weighted Average Interest Rate) 5,922 5,922 Other Debt Arrangements 4,399 1,419 Less: Unamortized Debt Issuance Costs (1,331) (1,686) 186,855 183,520 Less: Amounts Due in One Year* (107,519) (1,635) Long-Term Debt $ 79,336 $ 181,885

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Tables)	9 Months Ended
	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Schedule of Guarantor Obligations	Amount of Commitment Expiration per Period Total Amounts Committed Less Than 1 Year 1-3 Years 3-5 Years Beyond 5 Years Letters of Credit: Employee-Related $ 47,446 $ 29,635 $ 17,811 $ — $ — Environmental 398 398 — — — Other 131,006 117,606 13,400 — — Total Letters of Credit $ 178,850 $ 147,639 $ 31,211 $ — $ — Surety Bonds: Employee-Related $ 80,210 $ 80,210 $ — $ — $ — Environmental 528,597 528,597 — — — Other 4,071 4,071 — — — Total Surety Bonds $ 612,878 $ 612,878 $ — $ — $ —

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Schedule of Fair Value of Financial Instruments	The financial instruments measured at fair value on a recurring basis are summarized below: Fair Value Measurements at Fair Value Measurements at September 30, 2024 December 31, 2023 Description Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 U.S. Treasury Securities $ 84,333 $ — $ — $ 81,932 $ — $ —
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	The carrying amounts and fair values of financial instruments for which the fair value option was not elected are as follows: September 30, 2024 December 31, 2023 Carrying Fair Carrying Fair Long-Term Debt (Excluding Debt Issuance Costs) $ 188,186 $ 202,560 $ 185,206 $ 199,591

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2024
Segment Reporting [Abstract]
Schedule of Segment Reporting Information by Segment	Reportable segment results for the three months ended September 30, 2024 are: PAMC CONSOL Marine Terminal Other, Corporate and Eliminations Consolidated Coal Revenue $ 439,730 $ — $ 22,759 $ 462,489 Terminal Revenue — 23,740 — 23,740 Freight Revenue 62,219 — 1,187 63,406 Other Revenue — — 3,797 3,797 Total Revenue from Contracts with Customers $ 501,949 $ 23,740 $ 27,743 $ 553,432 Adjusted EBITDA $ 173,906 $ 15,917 $ (10,645) $ 179,178 Segment Assets $ 1,778,921 $ 87,602 $ 957,594 $ 2,824,117 Depreciation, Depletion and Amortization $ 44,663 $ 1,342 $ 7,324 $ 53,329 Capital Expenditures $ 30,743 $ 2,805 $ 5,840 $ 39,388 Reportable segment results for the three months ended September 30, 2023 are: PAMC CONSOL Marine Terminal Other, Corporate and Eliminations Consolidated Coal Revenue $ 431,090 $ — $ 18,528 $ 449,618 Terminal Revenue — 22,676 — 22,676 Freight Revenue 64,507 — 3,865 68,372 Total Revenue from Contracts with Customers $ 495,597 $ 22,676 $ 22,393 $ 540,666 Adjusted EBITDA $ 183,790 $ 14,853 $ (13,135) $ 185,508 Segment Assets $ 1,616,224 $ 83,422 $ 959,869 $ 2,659,515 Depreciation, Depletion and Amortization $ 50,663 $ 1,181 $ 6,948 $ 58,792 Capital Expenditures $ 35,404 $ 2,630 $ 3,633 $ 41,667 Reportable segment results for the nine months ended September 30, 2024 are: PAMC CONSOL Marine Terminal Other, Corporate and Eliminations Consolidated Coal Revenue $ 1,240,359 $ — $ 79,379 $ 1,319,738 Terminal Revenue — 60,288 — 60,288 Freight Revenue 192,569 — 6,319 198,888 Other Revenue — — 11,927 11,927 Total Revenue from Contracts with Customers $ 1,432,928 $ 60,288 $ 97,625 $ 1,590,841 Adjusted EBITDA $ 481,685 $ 37,925 $ (34,141) $ 485,469 Segment Assets $ 1,778,921 $ 87,602 $ 957,594 $ 2,824,117 Depreciation, Depletion and Amortization $ 136,607 $ 3,816 $ 24,750 $ 165,173 Capital Expenditures $ 114,744 $ 7,605 $ 14,799 $ 137,148 Reportable segment results for the nine months ended September 30, 2023 are: PAMC CONSOL Marine Terminal Other, Corporate and Eliminations Consolidated Coal Revenue $ 1,515,603 $ — $ 58,493 $ 1,574,096 Terminal Revenue — 80,755 — 80,755 Freight Revenue 206,725 — 10,710 217,435 Total Revenue from Contracts with Customers $ 1,722,328 $ 80,755 $ 69,203 $ 1,872,286 Adjusted EBITDA $ 784,819 $ 59,324 $ (36,385) $ 807,758 Segment Assets $ 1,616,224 $ 83,422 $ 959,869 $ 2,659,515 Depreciation, Depletion and Amortization $ 152,302 $ 3,513 $ 27,056 $ 182,871 Capital Expenditures $ 99,706 $ 4,329 $ 13,714 $ 117,749
Schedule of Revenue by Major Customers by Reporting Segments	For the three and nine months ended September 30, 2024 and 2023, the Company's reportable segments had revenues from the following customers, each comprising over 10% of the Company's total sales: Three Months Ended Nine Months Ended 2024 2023 2024 2023 Customer A $ 67,016 $ 69,322 $ 176,844 $ 220,726 Customer B $ 63,473 $ 72,335 $ 172,394 $ 207,746
Schedule of Adjusted EBITDA	Reconciliation of Segment Information to Consolidated Amounts: Three Months Ended September 30, 2024 PAMC CONSOL Marine Terminal Other Consolidated Net Income (Loss) $ 129,393 $ 12,966 $ (46,727) $ 95,632 Income Tax Expense — — 17,539 17,539 Interest Expense — 1,516 3,148 4,664 Interest Income (1,795) — (3,221) (5,016) Depreciation, Depletion and Amortization 44,663 1,342 7,324 53,329 Stock-Based Compensation 1,645 93 313 2,051 Merger-Related Expenses — — 10,979 10,979 Adjusted EBITDA $ 173,906 $ 15,917 $ (10,645) $ 179,178 Three Months Ended September 30, 2023 PAMC CONSOL Marine Terminal Other Consolidated Net Income (Loss) $ 132,442 $ 12,098 $ (43,815) $ 100,725 Income Tax Expense — — 21,032 21,032 Interest Expense — 1,524 5,121 6,645 Interest Income (723) — (3,301) (4,024) Depreciation, Depletion and Amortization 50,663 1,181 6,948 58,792 Stock-Based Compensation 1,408 50 218 1,676 Loss on Debt Extinguishment — — 662 662 Adjusted EBITDA $ 183,790 $ 14,853 $ (13,135) $ 185,508 Nine Months Ended September 30, 2024 PAMC CONSOL Marine Terminal Other Consolidated Net Income (Loss) $ 341,859 $ 29,118 $ (115,393) $ 255,584 Income Tax Expense — — 43,409 43,409 Interest Expense — 4,555 10,508 15,063 Interest Income (4,408) — (9,737) (14,145) Depreciation, Depletion and Amortization 136,607 3,816 24,750 165,173 Stock-Based Compensation 7,627 436 1,343 9,406 Merger-Related Expenses — — 10,979 10,979 Adjusted EBITDA $ 481,685 $ 37,925 $ (34,141) $ 485,469 Nine Months Ended September 30, 2023 PAMC CONSOL Marine Terminal Other Consolidated Net Income (Loss) $ 627,053 $ 50,981 $ (179,209) $ 498,825 Income Tax Expense — — 100,199 100,199 Interest Expense — 4,576 19,503 24,079 Interest Income (1,644) — (7,758) (9,402) Depreciation, Depletion and Amortization 152,302 3,513 27,056 182,871 Stock-Based Compensation 7,108 254 1,099 8,461 Loss on Debt Extinguishment — — 2,725 2,725 Adjusted EBITDA $ 784,819 $ 59,324 $ (36,385) $ 807,758

Basis of Presentation - Schedul

Basis of Presentation - Schedule of Antidilutive Securities (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	377	0	458	1,031
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	377	0	458	1,031
Performance Shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	0	0	0	0

Basis of Presentation - Sched_2

Basis of Presentation - Schedule of Basic and Dilutive Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Numerator:
Net Income	$ 95,632	$ 58,061	$ 101,891	$ 100,725	$ 167,723	$ 230,377	$ 255,584	$ 498,825
Denominator:
Weighted-average shares of common stock outstanding (in shares)	29,580,649			31,928,295			29,705,627	33,330,892
Effect of dilutive shares (in shares)	121,406			464,394			118,962	479,628
Weighted-average diluted shares of common stock outstanding (in shares)	29,702,055			32,392,689			29,824,589	33,810,520
Earnings per Share:
Basic (in dollars per share)	$ 3.23			$ 3.15			$ 8.60	$ 14.97
Diluted (in dollars per share)	$ 3.22			$ 3.11			$ 8.57	$ 14.75

Basis of Presentation - Narrati

Basis of Presentation - Narrative (Details)	Sep. 30, 2024 shares
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Preferred stock, shares authorized (in shares)	500,000
Preferred stock, shares issued (in shares)	0
Preferred stock, shares outstanding (in shares)	0

Revenue From Contracts With C_3

Revenue From Contracts With Customers - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	$ 553,432	$ 540,666	$ 1,590,841	$ 1,872,286
Coal
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	462,489	449,618	1,319,738	1,574,096
Power Generation
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	226,796	206,277	671,172	747,334
Industrial
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	151,465	180,785	434,206	590,196
Metallurgical
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	84,228	62,556	214,360	236,566
Terminal Revenue
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	23,740	22,676	60,288	80,755
Freight Revenue
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	63,406	68,372	198,888	217,435
Other Revenue
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	3,797		11,927
Domestic | Coal
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	174,454	180,219	560,017	517,039
Domestic | Power Generation
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	163,769	169,143	515,159	476,598
Domestic | Industrial
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	2,485	11,076	13,636	29,814
Domestic | Metallurgical
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	8,200	0	31,222	10,627
Export | Coal
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	288,035	269,399	759,721	1,057,057
Export | Power Generation
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	63,027	37,134	156,013	270,736
Export | Industrial
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	148,980	169,709	420,570	560,382
Export | Metallurgical
Disaggregation of Revenue [Line Items]
Total Revenue from Contracts with Customers	$ 76,028	$ 62,556	$ 183,138	$ 225,939

Revenue From Contracts With C_4

Revenue From Contracts With Customers - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Coal
Disaggregation of Revenue [Line Items]
Capitalized contract cost, net	$ 0		$ 0		$ 0
Capitalized contract cost, amortization	0	$ 0	0	$ 0
Contract with customer, liability, revenue recognized	0
Terminal Revenue
Disaggregation of Revenue [Line Items]
Capitalized contract cost, net	0		0		$ 0
Capitalized contract cost, amortization	0	$ 0	$ 0	$ 0
Contract with customer, liability, revenue recognized	$ 0

Components of Pension and Oth_3

Components of Pension and Other Post-employment Benefit (OPEB) Plans Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pension Benefits
Defined Contribution Plan Disclosure [Line Items]
Service Cost	$ 302	$ 304	$ 906	$ 913
Interest Cost	6,431	6,756	19,293	20,270
Expected Return on Plan Assets	(7,991)	(9,867)	(23,973)	(29,602)
Amortization of Prior Service Credits	0	0	0	0
Amortization of Actuarial Loss (Gain)	1,567	185	4,699	555
Net Periodic Benefit Cost (Credit)	309	(2,622)	925	(7,864)
Other Post-Employment Benefits
Defined Contribution Plan Disclosure [Line Items]
Service Cost	0	0	0	0
Interest Cost	2,758	3,261	8,274	9,783
Expected Return on Plan Assets	0	0	0	0
Amortization of Prior Service Credits	(601)	(601)	(1,804)	(1,804)
Amortization of Actuarial Loss (Gain)	(70)	0	(209)	0
Net Periodic Benefit Cost (Credit)	$ 2,087	$ 2,660	$ 6,261	$ 7,979

Components of Coal Workers' P_3

Components of Coal Workers' Pneumoconiosis (CWP) and Workers' Compensation Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
CWP
Defined Contribution Plan Disclosure [Line Items]
Service Cost	$ 746	$ 578	$ 2,239	$ 1,734
Interest Cost	2,066	2,071	6,198	6,214
Amortization of Actuarial Loss (Gain)	109	(261)	326	(784)
State Administrative Fees and Insurance Bond Premiums	0	0	0	0
Net Periodic Benefit Cost (Credit)	2,921	2,388	8,763	7,164
Workers' Compensation
Defined Contribution Plan Disclosure [Line Items]
Service Cost	1,465	1,400	4,393	4,198
Interest Cost	572	628	1,717	1,885
Amortization of Actuarial Loss (Gain)	(540)	(512)	(1,620)	(1,537)
State Administrative Fees and Insurance Bond Premiums	464	471	1,393	1,482
Net Periodic Benefit Cost (Credit)	$ 1,961	$ 1,987	$ 5,883	$ 6,028

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Income Tax Expense	$ 17,539	$ 21,032	$ 43,409	$ 100,199
Effective income tax rate reconciliation, percent	15.50%	17.30%	14.50%	16.70%
Effective income tax rate reconciliation, at federal statutory income tax rate, percent	21%	21%	21%	21%

Cash and Cash Equivalents and_3

Cash and Cash Equivalents and Short-Term Investments - Schedule of Cash, Cash Equivalents and Short-Term Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Cash and Cash Equivalents	$ 331,674	$ 199,371	$ 167,586
Restricted Cash - Current	37,941		46,313
Restricted Cash - Non-current	0		2,095
Cash and Cash Equivalents and Restricted Cash	$ 369,615	$ 243,268	$ 215,994	$ 326,952

Cash and Cash Equivalents and_4

Cash and Cash Equivalents and Short-Term Investments - Schedule of Investments in Available-for-Sale Securities (Details) - U.S. Treasury Securities - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	$ 84,107	$ 81,829
Allowance for Credit Losses	0	0
Gains	226	103
Losses	0	0
Fair Value	$ 84,333	$ 81,932

Credit Losses (Details)

Credit Losses (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2024 USD ($)
Trade Receivables
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 466
Provision for expected credit losses	(131)
Ending Balance	335
Other Non-Trade Contractual Arrangements
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	7,504
Provision for expected credit losses	(54)
Ending Balance	$ 7,450

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Inventory Disclosure [Abstract]
Coal	$ 41,578	$ 17,128
Supplies	75,054	71,026
Total Inventories	$ 116,632	$ 88,154

Accounts Receivable Securitiz_2

Accounts Receivable Securitization (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payments of financing costs			$ 0	$ 2,810,000
Line of Credit | Accounts Receivable Securitization Facility
Accounts, Notes, Loans and Financing Receivable [Line Items]
Line of credit facility, maximum borrowing capacity	$ 100,000,000		$ 100,000,000
Line of credit facility, unused capacity, commitment fee percentage			0.60%
Accounts receivable eligible for securitization	57,465,000		$ 57,465,000		$ 72,125,000
Line of credit facility, fair value of amount outstanding	0		0		0
Letters of credit outstanding, amount	54,977,000		54,977,000		72,087,000
Line of credit facility, remaining borrowing capacity	2,488,000		2,488,000		$ 38,000
Payments of financing costs	$ 354,000	$ 323,000	$ 1,066,000	$ 1,060,000
Line of Credit | Accounts Receivable Securitization Facility | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Line of credit facility, commitment fee percentage			2%
Line of Credit | Accounts Receivable Securitization Facility | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Line of credit facility, commitment fee percentage			2.50%

Property, Plant and Equipment -

Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment	$ 5,701,714	$ 5,552,404
Less: Accumulated Depreciation, Depletion and Amortization	3,792,369	3,649,281
Total Property, Plant and Equipment - Net	1,909,345	1,903,123
Plant and Equipment
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment	3,584,192	3,458,655
Coal Properties and Surface Lands
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment	910,310	906,343
Airshafts
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment	511,482	492,806
Mine Development
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment	366,260	366,260
Advance Mining Royalties
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment	$ 329,470	$ 328,340

Property, Plant and Equipment_2

Property, Plant and Equipment - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Finance lease, right-of-use asset, before accumulated amortization	$ 28,269		$ 28,269		$ 44,622
Finance lease, right-of-use asset, accumulated amortization	19,765		19,765		$ 31,873
Finance lease, right-of-use asset, amortization	$ 2,110	$ 6,524	$ 7,652	$ 20,369

Other Accrued Liabilities (Deta

Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Other Liabilities Disclosure [Abstract]
Subsidence Liability	$ 112,678	$ 105,322
Accrued Compensation and Benefits	48,908	73,763
Accrued Other Taxes	10,092	12,276
Accrued Income Taxes	9,569	0
Deferred Revenue	3,775	9,517
Accrued Interest	3,125	6,283
Other	16,851	10,457
Current Portion of Long-Term Liabilities:
Asset Retirement Obligations	33,984	28,571
Postretirement Benefits Other than Pensions	19,237	19,327
Pneumoconiosis Benefits	14,496	15,071
Workers' Compensation	9,293	10,019
Total Other Accrued Liabilities	$ 282,008	$ 290,606

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-term Debt Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Apr. 30, 2021
Debt Instrument [Line Items]
Less: Unamortized Debt Issuance Costs	$ (1,331)	$ (1,686)
Principal amount	186,855	183,520
Less: amounts due in one year	(107,519)	(1,635)
Long-Term Debt	79,336	181,885
MEDCO Revenue Bonds in Series Due September 2025 at 5.75%
Debt Instrument [Line Items]
Long-term debt, gross	$ 102,865	$ 102,865
Stated interest rate percentage	5.75%	5.75%
PEDFA Solid Waste Disposal Revenue Bonds
Debt Instrument [Line Items]
Long-term debt, gross	$ 75,000	$ 75,000
Stated interest rate percentage	9%	9%	9%
Advance Royalty Commitments
Debt Instrument [Line Items]
Long-term debt, gross	$ 5,922	$ 5,922
Weighted average interest rate	8.80%	8.80%
Other Debt Arrangements
Debt Instrument [Line Items]
Long-term debt, gross	$ 4,399	$ 1,419
Loans Payable | Revolving Credit Facility
Debt Instrument [Line Items]
Finance lease, liability, current	$ 4,379	$ 9,471

Long-Term Debt - Narrative (Det

Long-Term Debt - Narrative (Details) T in Billions	1 Months Ended	3 Months Ended						9 Months Ended
	Apr. 30, 2021 USD ($)	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2024 USD ($) T	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Mar. 28, 2023 USD ($)
Debt Instrument [Line Items]
Number of tons | T								1.3
Assets		$ 2,824,117,000			$ 2,659,515,000			$ 2,824,117,000	$ 2,659,515,000	$ 2,675,003,000
Net Income		$ 95,632,000	$ 58,061,000	$ 101,891,000	100,725,000	$ 167,723,000	$ 230,377,000	$ 255,584,000	498,825,000
PEDFA Solid Waste Disposal Revenue Bonds
Debt Instrument [Line Items]
Debt instrument, face amount	$ 75,000,000,000
Debt instrument, interest rate, stated percentage	9%	9%						9%		9%
Debt instrument, term	7 years
Restricted cash		$ 261,000						$ 261,000		$ 12,177,000
Senior Secured Second Lien Notes due 2025
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	11%
PEDFA Solid Waste Disposal Revenue Bonds Due April 2028 | Restricted Cash
Debt Instrument [Line Items]
Payment of capital construction project, qualified costs		5,206,000			8,442,000			12,247,000	16,313,000
Non-Guarantor Subsidiaries
Debt Instrument [Line Items]
Assets		129,143,000						129,143,000		147,918,000
Accounts receivable, after allowance for credit loss		128,901,000						128,901,000		147,612,000
Net Income		528,000			$ 235,000			775,000	$ 4,843,000
Revolving Credit Facility
Debt Instrument [Line Items]
Long-term line of credit		0						0		0
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						355,000,000					$ 260,000,000
Line of credit facility, maximum borrowing capacity, option to increase, maximum increase amount						45,000,000
Line of credit facility, maximum borrowing capacity, option to increase, maximum amount						$ 400,000,000
Letters of credit outstanding, amount		123,873,000						123,873,000		111,186,000
Line of credit facility, remaining borrowing capacity		$ 231,127,000						$ 231,127,000		$ 243,814,000
Revolving Credit Facility and TLA Facility | Line of Credit
Debt Instrument [Line Items]
Debt instrument, covenant, net leverage ratio, maximum					2.50				2.50
Debt instrument, covenant, fixed charge coverage ratio, minimum					1.10				1.10
Debt instrument, covenant, first lien gross leverage ratio, actual		0.02						0.02
Debt instrument, covenant, net leverage ratio, actual		(0.31)						(0.31)
Debt instrument, covenant, fixed charge coverage ratio, actual		2.88						2.88
Revolving Credit Facility and TLA Facility | Line of Credit | Maximum
Debt Instrument [Line Items]
Debt instrument, covenant, first lien gross leverage ratio					1.50				1.50

Commitments and Contingent Li_3

Commitments and Contingent Liabilities - Narrative (Details)			9 Months Ended
	Mar. 07, 2024 USD ($)	Aug. 23, 2017 plaintiff	Sep. 30, 2024 USD ($) plaintiff
Fitzwater Litigation
Loss Contingencies [Line Items]
Number of plaintiffs | plaintiff			3
Casey Litigation | Pending Litigation
Loss Contingencies [Line Items]
Number of plaintiffs | plaintiff		2
United Mine Workers of America 1992 Benefit Plan Litigation | Pending Litigation | Minimum
Loss Contingencies [Line Items]
Annual servicing costs			$ 10,000,000
United Mine Workers of America 1992 Benefit Plan Litigation | Pending Litigation | Maximum
Loss Contingencies [Line Items]
Annual servicing costs			20,000,000
Indemnification Lawsuit
Loss Contingencies [Line Items]
Loss contingency, damages sought, value	$ 75,000,000
Litigation settlement period	5 years
Loss contingency accrual			$ 0

Commitments and Contingent Li_4

Commitments and Contingent Liabilities - Schedule of Guarantor Obligations (Details) $ in Thousands	Sep. 30, 2024 USD ($)
Letters of Credit:
Loss Contingencies [Line Items]
Total Amounts Committed	$ 178,850
Less Than 1 Year	147,639
1-3 Years	31,211
3-5 Years	0
Beyond 5 Years	0
Letters of Credit: | Employee-Related
Loss Contingencies [Line Items]
Total Amounts Committed	47,446
Less Than 1 Year	29,635
1-3 Years	17,811
3-5 Years	0
Beyond 5 Years	0
Letters of Credit: | Environmental
Loss Contingencies [Line Items]
Total Amounts Committed	398
Less Than 1 Year	398
1-3 Years	0
3-5 Years	0
Beyond 5 Years	0
Letters of Credit: | Other
Loss Contingencies [Line Items]
Total Amounts Committed	131,006
Less Than 1 Year	117,606
1-3 Years	13,400
3-5 Years	0
Beyond 5 Years	0
Surety Bonds:
Loss Contingencies [Line Items]
Total Amounts Committed	612,878
Less Than 1 Year	612,878
1-3 Years	0
3-5 Years	0
Beyond 5 Years	0
Surety Bonds: | Employee-Related
Loss Contingencies [Line Items]
Total Amounts Committed	80,210
Less Than 1 Year	80,210
1-3 Years	0
3-5 Years	0
Beyond 5 Years	0
Surety Bonds: | Environmental
Loss Contingencies [Line Items]
Total Amounts Committed	528,597
Less Than 1 Year	528,597
1-3 Years	0
3-5 Years	0
Beyond 5 Years	0
Surety Bonds: | Other
Loss Contingencies [Line Items]
Total Amounts Committed	4,071
Less Than 1 Year	4,071
1-3 Years	0
3-5 Years	0
Beyond 5 Years	$ 0

Fair Value of Financial instr_3

Fair Value of Financial instruments - Schedule of Fair Value of Financial Instruments (Details) - U.S. Treasury Securities - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 84,333	$ 81,932
Fair Value, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	84,333	81,932
Fair Value, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Fair Value, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 0	$ 0

Fair Value of Financial instr_4

Fair Value of Financial instruments - Schedule of Carrying Values and Estimated Fair Values of Debt Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-Term Debt (Excluding Debt Issuance Costs)	$ 188,186	$ 185,206
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-Term Debt (Excluding Debt Issuance Costs)	$ 202,560	$ 199,591

Segment Information - Narrative

Segment Information - Narrative (Details)	9 Months Ended
	Sep. 30, 2024 segment
Segment Reporting [Abstract]
Number of reportable segments	2

Segment Information - Schedule

Segment Information - Schedule of Segment Reporting Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	$ 553,432	$ 540,666	$ 1,590,841	$ 1,872,286
Adjusted EBITDA	179,178	185,508	485,469	807,758
Segment Assets	2,824,117	2,659,515	2,824,117	2,659,515	$ 2,675,003
Depreciation, Depletion and Amortization	53,329	58,792	165,173	182,871
Capital Expenditures	39,388	41,667	137,148	117,749
Coal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	462,489	449,618	1,319,738	1,574,096
Terminal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	23,740	22,676	60,288	80,755
Freight Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	63,406	68,372	198,888	217,435
Other Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	3,797		11,927
Other, Corporate and Eliminations
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	27,743	22,393	97,625	69,203
Adjusted EBITDA	(10,645)	(13,135)	(34,141)	(36,385)
Segment Assets	957,594	959,869	957,594	959,869
Depreciation, Depletion and Amortization	7,324	6,948	24,750	27,056
Capital Expenditures	5,840	3,633	14,799	13,714
Other, Corporate and Eliminations | Coal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	22,759	18,528	79,379	58,493
Other, Corporate and Eliminations | Terminal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	0	0	0	0
Other, Corporate and Eliminations | Freight Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	1,187	3,865	6,319	10,710
Other, Corporate and Eliminations | Other Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	3,797		11,927
PAMC | Operating Segments
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	501,949	495,597	1,432,928	1,722,328
Adjusted EBITDA	173,906	183,790	481,685	784,819
Segment Assets	1,778,921	1,616,224	1,778,921	1,616,224
Depreciation, Depletion and Amortization	44,663	50,663	136,607	152,302
Capital Expenditures	30,743	35,404	114,744	99,706
PAMC | Operating Segments | Coal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	439,730	431,090	1,240,359	1,515,603
PAMC | Operating Segments | Terminal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	0	0	0	0
PAMC | Operating Segments | Freight Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	62,219	64,507	192,569	206,725
PAMC | Operating Segments | Other Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	0		0
CONSOL Marine Terminal | Operating Segments
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	23,740	22,676	60,288	80,755
Adjusted EBITDA	15,917	14,853	37,925	59,324
Segment Assets	87,602	83,422	87,602	83,422
Depreciation, Depletion and Amortization	1,342	1,181	3,816	3,513
Capital Expenditures	2,805	2,630	7,605	4,329
CONSOL Marine Terminal | Operating Segments | Coal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	0	0	0	0
CONSOL Marine Terminal | Operating Segments | Terminal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	23,740	22,676	60,288	80,755
CONSOL Marine Terminal | Operating Segments | Freight Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	0	$ 0	0	$ 0
CONSOL Marine Terminal | Operating Segments | Other Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	$ 0		$ 0

Segment Information - Schedul_2

Segment Information - Schedule of Revenue by Major Customers by Reporting Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	$ 553,432	$ 540,666	$ 1,590,841	$ 1,872,286
Revenue Benchmark | Customer Concentration Risk | Customer A
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	67,016	69,322	176,844	220,726
Revenue Benchmark | Customer Concentration Risk | Customer B
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	$ 63,473	$ 72,335	$ 172,394	$ 207,746

Segment Information - Schedul_3

Segment Information - Schedule of Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Net Income (Loss)	$ 95,632	$ 100,725	$ 255,584	$ 498,825
Income Tax Expense	17,539	21,032	43,409	100,199
Interest Expense	4,664	6,645	15,063	24,079
Interest Income	(5,016)	(4,024)	(14,145)	(9,402)
Depreciation, Depletion and Amortization	53,329	58,792	165,173	182,871
Stock-Based Compensation	2,051	1,676	9,406	8,461
Merger-Related Expenses	10,979		10,979
Loss on Debt Extinguishment	0	662	0	2,725
Adjusted EBITDA	179,178	185,508	485,469	807,758
Other, Corporate and Eliminations
Segment Reporting Information [Line Items]
Net Income (Loss)	(46,727)	(43,815)	(115,393)	(179,209)
Income Tax Expense	17,539	21,032	43,409	100,199
Interest Expense	3,148	5,121	10,508	19,503
Interest Income	(3,221)	(3,301)	(9,737)	(7,758)
Depreciation, Depletion and Amortization	7,324	6,948	24,750	27,056
Stock-Based Compensation	313	218	1,343	1,099
Merger-Related Expenses	10,979		10,979
Loss on Debt Extinguishment		662		2,725
Adjusted EBITDA	(10,645)	(13,135)	(34,141)	(36,385)
PAMC | Operating Segments
Segment Reporting Information [Line Items]
Net Income (Loss)	129,393	132,442	341,859	627,053
Income Tax Expense	0	0	0	0
Interest Expense	0	0	0	0
Interest Income	(1,795)	(723)	(4,408)	(1,644)
Depreciation, Depletion and Amortization	44,663	50,663	136,607	152,302
Stock-Based Compensation	1,645	1,408	7,627	7,108
Merger-Related Expenses	0		0
Loss on Debt Extinguishment		0		0
Adjusted EBITDA	173,906	183,790	481,685	784,819
CONSOL Marine Terminal | Operating Segments
Segment Reporting Information [Line Items]
Net Income (Loss)	12,966	12,098	29,118	50,981
Income Tax Expense	0	0	0	0
Interest Expense	1,516	1,524	4,555	4,576
Interest Income	0	0	0	0
Depreciation, Depletion and Amortization	1,342	1,181	3,816	3,513
Stock-Based Compensation	93	50	436	254
Merger-Related Expenses	0		0
Loss on Debt Extinguishment		0		0
Adjusted EBITDA	$ 15,917	$ 14,853	$ 37,925	$ 59,324

Stock and Debt Repurchases (Det

Stock and Debt Repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended					9 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Apr. 30, 2023
Equity [Abstract]
Aggregate authorized amount								$ 1,000,000
Repurchases of common stock (in shares)	132,063	615,288	1,547,846	1,225,134	1,207,409	747,351	3,980,389
Treasury stock acquired, average cost per share (in dollars per share)						$ 89.49	$ 67.68

PROPOSED MERGER (Details)

PROPOSED MERGER (Details) - USD ($) $ / shares in Units, $ in Millions	Aug. 20, 2024	Sep. 30, 2024	Dec. 31, 2023
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Arch Resources, Inc
Business Acquisition [Line Items]
Common Stock Portion, number of Consol Energy's stock for each share of Arch Resources, Inc common stock converted (in shares)	1.326
Business combination, termination fee	$ 82
Business combination, expense reimbursement	$ 23.5
Arch Resources, Inc | Common Class A | Arch Resources, Inc
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)	$ 0.01
Arch Resources, Inc | Common Class B | Arch Resources, Inc
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)	$ 0.01

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended				9 Months Ended
	Nov. 05, 2024	Oct. 02, 2024	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Subsequent Event [Line Items]
Dividends declared per common share (in dollars per share)			$ 0.25	$ 0	$ 1.10	$ 1.10	$ 0.25	$ 2.20
Dividends on common shares			$ 7,348		$ 37,187	$ 38,287
Subsequent Event
Subsequent Event [Line Items]
Dividends declared per common share (in dollars per share)	$ 0.25
Dividends on common shares	$ 7,000
Subsequent Event | Global Water Treatment Trust Fund | Pennsylvania Department of Environmental Protection
Subsequent Event [Line Items]
contribution plan, cost		$ 74,200
Contribution plan, cash		12,000
Contribution plan, surety bonds		62,000
Contribution plan, minimum annual cost		$ 2,000