Segment Information - Schedule of Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Net Income (Loss)	$ 100,725	$ 152,121	$ 498,825	$ 273,962
Income Tax Expense	21,032	39,414	100,199	59,115
Interest Expense	6,645	11,962	24,079	39,435
Interest Income	(4,024)	(1,541)	(9,402)	(4,309)
Depreciation, Depletion and Amortization	58,792	54,773	182,871	168,607
Stock-Based Compensation	1,676	1,224	8,461	6,694
Loss on Debt Extinguishment	662	674	2,725	4,361
Equity Affiliate Adjustments		3,500	3,500
Fair Value Adjustment of Commodity Derivative Instruments		(81,246)		15,085
Adjusted EBITDA	185,508	180,881	807,758	566,450
Other, Corporate and Eliminations
Segment Reporting Information [Line Items]
Net Income (Loss)	(43,815)	(64,336)	(179,209)	(128,015)
Income Tax Expense	21,032	39,414	100,199	59,115
Interest Expense	5,121	10,434	19,503	34,641
Interest Income	(3,301)	(1,104)	(7,758)	(3,005)
Depreciation, Depletion and Amortization	6,948	4,308	27,056	15,414
Stock-Based Compensation	218	147	1,099	804
Loss on Debt Extinguishment	662	674	2,725	4,361
Equity Affiliate Adjustments		3,500	3,500
Fair Value Adjustment of Commodity Derivative Instruments		0		0
Adjusted EBITDA	(13,135)	(6,963)	(36,385)	(13,185)
PAMC | Operating Segments
Segment Reporting Information [Line Items]
Net Income (Loss)	132,442	210,855	627,053	372,408
Income Tax Expense	0	0	0	0
Interest Expense	0	0	0	205
Interest Income	(723)	(437)	(1,644)	(1,304)
Depreciation, Depletion and Amortization	50,663	49,316	152,302	149,737
Stock-Based Compensation	1,408	1,028	7,108	5,622
Loss on Debt Extinguishment	0	0	0	0
Equity Affiliate Adjustments		0	0
Fair Value Adjustment of Commodity Derivative Instruments		(81,246)		15,085
Adjusted EBITDA	183,790	179,516	784,819	541,753
CONSOL Marine Terminal | Operating Segments
Segment Reporting Information [Line Items]
Net Income (Loss)	12,098	5,602	50,981	29,569
Income Tax Expense	0	0	0	0
Interest Expense	1,524	1,528	4,576	4,589
Interest Income	0	0	0	0
Depreciation, Depletion and Amortization	1,181	1,149	3,513	3,456
Stock-Based Compensation	50	49	254	268
Loss on Debt Extinguishment	0	0	0	0
Equity Affiliate Adjustments		0	0
Fair Value Adjustment of Commodity Derivative Instruments		0		0
Adjusted EBITDA	$ 14,853	$ 8,328	$ 59,324	$ 37,882