Consolidated Statements of Stockholders' Equity (Parentheticals) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CONSOL Coal Resources L P [Member]
Shares repurchased (in shares)				26,297
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Cumulative Change in Accounting Principle, Tax			$ 1,109
Actuarially Determined Long-Term Liability Adjustments, Tax		$ 26,506	4,868	$ 8,429
Interest Rate Hedge, Tax		$ 596	$ 674	$ 37
Shares repurchased (in shares)	[1]	(0)	(0)	1,717,497

[1] See Note 5 - Stock and Debt Repurchases for additional information.