Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	CONSOL Coal Resources L P [Member] Common Stock [Member]	CONSOL Coal Resources L P [Member] Additional Paid-in Capital [Member]	CONSOL Coal Resources L P [Member] Retained Earnings [Member]	CONSOL Coal Resources L P [Member] AOCI Attributable to Parent [Member]	CONSOL Coal Resources L P [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2020						$ 340	$ 642,887	$ 246,850	$ (336,558)	$ 553,519
Net (Loss) Income						0	0	26,404	0	26,404
Actuarially Determined Long-Term Liability Adjustments, Net of Tax						0	0	0	3,360	3,360
Interest Rate Hedge, net						0	0	0	414	414
Comprehensive (Loss) Income						0	0	26,404	3,774	30,178
Issuance of Common Stock						4		0	0	0
Issuance of Common Stock							(4)
Amortization of Stock-Based Compensation Awards						0	1,509	0	0	1,509
Shares Withheld for Taxes						0	(2,072)	0	0	(2,072)
Actuarially Determined Long-Term Liability Adjustments (Net of $508 Tax)						0	0	0	3,360	3,360
Interest Rate Hedge (Net of $89 Tax)						0	0	0	414	414
Shares Withheld for Taxes						(0)	2,072	(0)	(0)	2,072
CCR Merger	$ 0	$ (266)	$ 0	$ 197	$ (69)
Net (Loss) Income						0	0	26,404	0	26,404
Balance at Mar. 31, 2021						344	642,054	273,254	(332,587)	583,065
Balance at Dec. 31, 2020						340	642,887	246,850	(336,558)	553,519
Net (Loss) Income										(83,213)
Actuarially Determined Long-Term Liability Adjustments, Net of Tax										10,844
Interest Rate Hedge, net										1,195
Comprehensive (Loss) Income										(71,174)
Actuarially Determined Long-Term Liability Adjustments (Net of $508 Tax)										10,844
Interest Rate Hedge (Net of $89 Tax)										1,195
Net (Loss) Income										(83,213)
Balance at Sep. 30, 2021						345	644,920	163,637	(324,322)	484,580
Balance at Mar. 31, 2021						344	642,054	273,254	(332,587)	583,065
Net (Loss) Income						0	0	4,172	0	4,172
Actuarially Determined Long-Term Liability Adjustments, Net of Tax						0	0	0	4,125	4,125
Interest Rate Hedge, net						0	0	0	391	391
Comprehensive (Loss) Income						0	0	4,172	4,516	8,688
Issuance of Common Stock						1		0	0	0
Issuance of Common Stock							(1)
Amortization of Stock-Based Compensation Awards						0	1,210	0	0	1,210
Shares Withheld for Taxes						0	(230)	0	0	(230)
Actuarially Determined Long-Term Liability Adjustments (Net of $508 Tax)						0	0	0	4,125	4,125
Interest Rate Hedge (Net of $89 Tax)						0	0	0	391	391
Shares Withheld for Taxes						(0)	230	(0)	(0)	230
Net (Loss) Income						0	0	4,172	0	4,172
Balance at Jun. 30, 2021						345	643,033	277,426	(328,071)	592,733
Net (Loss) Income						0	0	(113,789)	0	(113,789)
Actuarially Determined Long-Term Liability Adjustments, Net of Tax						0	0	0	3,359	3,359
Interest Rate Hedge, net						0	0	0	390	390
Comprehensive (Loss) Income						0	0	(113,789)	3,749	(110,040)
Amortization of Stock-Based Compensation Awards						0	1,888	0	0	1,888
Shares Withheld for Taxes						0	(1)	0	0	(1)
Actuarially Determined Long-Term Liability Adjustments (Net of $508 Tax)						0	0	0	3,359	3,359
Interest Rate Hedge (Net of $89 Tax)						0	0	0	390	390
Shares Withheld for Taxes						(0)	1	(0)	(0)	1
Net (Loss) Income						0	0	(113,789)	0	(113,789)
Balance at Sep. 30, 2021						345	644,920	163,637	(324,322)	484,580
Balance at Dec. 31, 2021						345	646,945	280,960	(255,437)	672,813
Net (Loss) Income						0	0	(4,450)	0	(4,450)
Actuarially Determined Long-Term Liability Adjustments, Net of Tax						0	0	0	1,525	1,525
Interest Rate Hedge, net						0	0	0	391	391
Comprehensive (Loss) Income						0	0	(4,450)	1,916	(2,534)
Issuance of Common Stock						3		0	0	0
Issuance of Common Stock							(3)
Amortization of Stock-Based Compensation Awards						0	4,201	0	0	4,201
Shares Withheld for Taxes						0	(6,072)	0	0	(6,072)
Actuarially Determined Long-Term Liability Adjustments (Net of $508 Tax)						0	0	0	1,525	1,525
Interest Rate Hedge (Net of $89 Tax)						0	0	0	391	391
Shares Withheld for Taxes						(0)	6,072	(0)	(0)	6,072
Net (Loss) Income						0	0	(4,450)	0	(4,450)
Balance at Mar. 31, 2022						348	645,071	276,510	(253,521)	668,408
Balance at Dec. 31, 2021						345	646,945	280,960	(255,437)	672,813
Net (Loss) Income										273,962
Actuarially Determined Long-Term Liability Adjustments, Net of Tax										4,574
Interest Rate Hedge, net										401
Comprehensive (Loss) Income										278,937
Actuarially Determined Long-Term Liability Adjustments (Net of $508 Tax)										4,574
Interest Rate Hedge (Net of $89 Tax)										401
Net (Loss) Income										273,962
Balance at Sep. 30, 2022						349	647,448	519,110	(250,462)	916,445
Balance at Mar. 31, 2022						348	645,071	276,510	(253,521)	668,408
Net (Loss) Income						0	0	126,291	0	126,291
Actuarially Determined Long-Term Liability Adjustments, Net of Tax						0	0	0	1,524	1,524
Interest Rate Hedge, net						0	0	0	224	224
Comprehensive (Loss) Income						0	0	126,291	1,748	128,039
Issuance of Common Stock						1		0	0	0
Issuance of Common Stock							(1)
Amortization of Stock-Based Compensation Awards						0	1,269	0	0	1,269
Shares Withheld for Taxes						0	(122)	0	0	(122)
Actuarially Determined Long-Term Liability Adjustments (Net of $508 Tax)						0	0	0	1,524	1,524
Interest Rate Hedge (Net of $89 Tax)						0	0	0	224	224
Shares Withheld for Taxes						(0)	122	(0)	(0)	122
Net (Loss) Income						0	0	126,291	0	126,291
Balance at Jun. 30, 2022						349	646,217	402,801	(251,773)	797,594
Net (Loss) Income						0	0	152,121	0	152,121
Actuarially Determined Long-Term Liability Adjustments, Net of Tax						0	0	0	1,525	1,525
Interest Rate Hedge, net						0	0	0	(214)	(214)
Comprehensive (Loss) Income						0	0	152,121	1,311	153,432
Amortization of Stock-Based Compensation Awards						0	1,224	0	0	1,224
Shares Withheld for Taxes						0	(7)	0	0	(7)
Actuarially Determined Long-Term Liability Adjustments (Net of $508 Tax)						0	0	0	1,525	1,525
Interest Rate Hedge (Net of $89 Tax)						0	0	0	(214)	(214)
Shares Withheld for Taxes						0	7	0	0	7
Dividends on Common Shares ($1.00/share)						0	0	(34,871)	0	(34,871)
Dividend Equivalents Earned on Stock-Based Compensation Awards						0	0	(941)	0	(941)
Net (Loss) Income						0	0	152,121	0	152,121
Balance at Sep. 30, 2022						$ 349	$ 647,448	$ 519,110	$ (250,462)	$ 916,445