Segment Information - Schedule of Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Net Income (Loss)	$ 167,723	$ 126,291	$ 398,100	$ 121,841
Income Tax Expense	37,574	23,223	79,167	19,701
Interest Expense	7,155	13,121	17,434	27,473
Interest Income	(3,711)	(1,439)	(5,378)	(2,768)
Depreciation, Depletion and Amortization	64,528	57,880	124,079	113,834
Stock-Based Compensation	1,993	1,269	6,785	5,470
Loss on Debt Extinguishment	688	1,565	2,063	3,687
Fair Value Adjustment of Commodity Derivative Instruments		(5,571)		96,331
Adjusted EBITDA	275,950	216,339	622,250	385,569
PAMC
Segment Reporting Information [Line Items]
Net Income (Loss)	218,636	159,404	494,611	161,501
Income Tax Expense	0	0	0	0
Interest Expense	0	68	0	257
Interest Income	(513)	(452)	(921)	(866)
Depreciation, Depletion and Amortization	50,268	49,465	101,639	100,421
Stock-Based Compensation	1,674	1,066	5,700	4,595
Loss on Debt Extinguishment	0	0	0	0
Fair Value Adjustment of Commodity Derivative Instruments		(5,571)		96,331
Adjusted EBITDA	270,065	203,980	601,029	362,239
CONSOL Marine Terminal
Segment Reporting Information [Line Items]
Net Income (Loss)	21,094	12,354	38,883	23,967
Income Tax Expense	0	0	0	0
Interest Expense	1,526	1,530	3,052	3,061
Interest Income	0	0	0	0
Depreciation, Depletion and Amortization	1,176	1,142	2,332	2,307
Stock-Based Compensation	60	51	204	219
Loss on Debt Extinguishment	0	0	0	0
Fair Value Adjustment of Commodity Derivative Instruments		0		0
Adjusted EBITDA	23,856	15,077	44,471	29,554
Other
Segment Reporting Information [Line Items]
Net Income (Loss)	(72,007)	(45,467)	(135,394)	(63,627)
Income Tax Expense	37,574	23,223	79,167	19,701
Interest Expense	5,629	11,523	14,382	24,155
Interest Income	(3,198)	(987)	(4,457)	(1,902)
Depreciation, Depletion and Amortization	13,084	7,273	20,108	11,106
Stock-Based Compensation	259	152	881	656
Loss on Debt Extinguishment	688	1,565	2,063	3,687
Fair Value Adjustment of Commodity Derivative Instruments		0		0
Adjusted EBITDA	$ (17,971)	$ (2,718)	$ (23,250)	$ (6,224)