Consolidated Statements of Stockholders' Equity - 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] Parent [Member]	CONSOL Coal Resources L P [Member] Noncontrolling Interest [Member]	CONSOL Coal Resources L P [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Noncontrolling Interest [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2018															$ 274	$ 550,995	$ 182,148	$ (323,482)	$ 409,935	$ 141,676	$ 551,611
Net Income (Loss)															0	0	76,001	0	76,001	17,557	93,558
Actuarially Determined Long-Term Liability Adjustments, Net of Tax															0	0	0	(25,126)	(25,126)	(6)	(25,132)
Interest Rate Hedge															0	0	0	(117)	(117)	0	(117)
Comprehensive Income (loss)															0	0	76,001	(25,243)	50,758	17,551	68,309
Issuance of Common Stock															2		0	0	0	0	0
Issuance of Common Stock																(2)
Repurchases of Common Stock	$ 0	$ (29)	$ 0	$ 0	$ (29)		$ (369)								(17)	(34,470)		0	(32,733)	0	(32,733)
Repurchase of Common Stock																	1,754
Repurchase of Common Stock						$ (340)
Amortization of Stock-Based Compensation Awards															0	11,351	0	0	11,351		12,760
Amortization of Stock-Based Compensation Award																				1,409
Shares/Units Withheld for Taxes															0	(4,083)	0	0	(4,083)	(880)	(4,963)
Distributions to Noncontrolling Interest															0	0	0	0	0	(22,220)	(22,220)
Balance at Dec. 31, 2019								$ 0	$ 0	$ (3,298)	$ 0	$ (3,298)	$ 0	$ (3,298)	259	523,762	259,903	(348,725)	435,199	137,196	572,395
Net Income (Loss)															0	0	(9,755)	0	(9,755)	(3,459)	(13,214)
Actuarially Determined Long-Term Liability Adjustments, Net of Tax															0	0	0	14,171	14,171	59	14,230
Interest Rate Hedge															0	0	0	(2,004)	(2,004)	0	(2,004)
Comprehensive Income (loss)															0	0	(9,755)	12,167	2,412	(3,400)	(988)
Issuance of Common Stock															2		0	0	0	0	0
Issuance of Common Stock																(2)
Amortization of Stock-Based Compensation Awards															0	11,161	0	0	11,161		11,579
Amortization of Stock-Based Compensation Award																				418
Shares/Units Withheld for Taxes															0	(646)	0	0	(646)	(217)	(863)
Distributions to Noncontrolling Interest															0	0	0	0	0	(5,575)	(5,575)
CCR Merger	79	108,612	0	0	108,691	(128,422)	(19,731)
Balance at Dec. 31, 2020															340	642,887	246,850	(336,558)	553,519	0	553,519
Net Income (Loss)															0	0	34,110	0	34,110	0	34,110
Actuarially Determined Long-Term Liability Adjustments, Net of Tax															0	0	0	79,203	79,203	0	79,203
Interest Rate Hedge															0	0	0	1,721	1,721	0	1,721
Comprehensive Income (loss)															0	0	34,110	80,924	115,034	0	115,034
Issuance of Common Stock															5		0	0	0	0	0
Issuance of Common Stock																(5)
Amortization of Stock-Based Compensation Awards															0	6,632	0	0	6,632	0	6,632
Shares/Units Withheld for Taxes															0	(2,303)	0	0	(2,303)	0	(2,303)
CCR Merger	$ 0	$ (266)	$ 0	$ 197	$ (69)	$ 0	$ (69)
Balance at Dec. 31, 2021															$ 345	$ 646,945	$ 280,960	$ (255,437)	$ 672,813	$ 0	$ 672,813