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
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax						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)
CCR Merger	$ 0	$ (266)	$ 0	$ 197	$ (69)
Balance at Mar. 31, 2021						344	642,054	273,254	(332,587)	583,065
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
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax						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)
Balance at Mar. 31, 2022						$ 348	$ 645,071	$ 276,510	$ (253,521)	$ 668,408