Segment Information - Schedule of Adjusted EBITDA (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net Income (Loss)	$ 466,979	$ 34,110	$ (13,214)
Income Tax Expense	101,458	1,297	3,972
Interest Expense	52,640	63,342	61,186
Interest Income	(6,031)	(3,287)	(1,230)
Depreciation, Depletion and Amortization	226,878	224,583	210,760
Stock/Unit-Based Compensation	7,890	6,632	11,579
CCR Merger Fees			9,822
Loss (Gain) on Debt Extinguishment	5,623	$ (657)	(21,352)
Defined benefit plan, net periodic benefit cost (credit) excluding service cost, statement of income or comprehensive income		Operating and Other Costs
Equity Affiliate Adjustments	3,500
Settlement loss recognized		$ 22
Fair Value Adjustment of Commodity Derivative Instruments	(52,204)	52,204
Adjusted EBITDA	806,733	378,246	261,523
PAMC
Segment Reporting Information [Line Items]
Net Income (Loss)	620,208	94,161	16,185
Income Tax Expense	0	0	0
Interest Expense	0	1,710	1,236
Interest Income	(1,857)	(90)	(10)
Depreciation, Depletion and Amortization	200,320	206,727	198,272
Stock/Unit-Based Compensation	6,628	5,768	9,905
CCR Merger Fees			2,623
Loss (Gain) on Debt Extinguishment	0	0	0
Equity Affiliate Adjustments	0
Settlement loss recognized		0
Fair Value Adjustment of Commodity Derivative Instruments	(52,204)	52,204
Adjusted EBITDA	773,095	360,480	228,211
CONSOL Marine Terminal
Segment Reporting Information [Line Items]
Net Income (Loss)	41,223	32,251	32,537
Income Tax Expense	0	0	0
Interest Expense	6,116	6,141	6,166
Interest Income	0	0	0
Depreciation, Depletion and Amortization	4,604	4,834	5,095
Stock/Unit-Based Compensation	316	265	558
CCR Merger Fees			0
Loss (Gain) on Debt Extinguishment	0	0	0
Equity Affiliate Adjustments	0
Settlement loss recognized		0
Fair Value Adjustment of Commodity Derivative Instruments	0	0
Adjusted EBITDA	52,259	43,491	44,356
Other
Segment Reporting Information [Line Items]
Net Income (Loss)	(194,452)	(92,302)	(61,936)
Income Tax Expense	101,458	1,297	3,972
Interest Expense	46,524	55,491	53,784
Interest Income	(4,174)	(3,197)	(1,220)
Depreciation, Depletion and Amortization	21,954	13,022	7,393
Stock/Unit-Based Compensation	946	599	1,116
CCR Merger Fees			7,199
Loss (Gain) on Debt Extinguishment	5,623	(657)	(21,352)
Equity Affiliate Adjustments	3,500
Settlement loss recognized		22
Fair Value Adjustment of Commodity Derivative Instruments	0	0
Adjusted EBITDA	$ (18,621)	$ (25,725)	$ (11,044)