Segment Information - Schedule of Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Net Income (Loss)	$ 95,632	$ 100,725	$ 255,584	$ 498,825
Income Tax Expense	17,539	21,032	43,409	100,199
Interest Expense	4,664	6,645	15,063	24,079
Interest Income	(5,016)	(4,024)	(14,145)	(9,402)
Depreciation, Depletion and Amortization	53,329	58,792	165,173	182,871
Stock-Based Compensation	2,051	1,676	9,406	8,461
Merger-Related Expenses	10,979		10,979
Loss on Debt Extinguishment	0	662	0	2,725
Adjusted EBITDA	179,178	185,508	485,469	807,758
Other, Corporate and Eliminations
Segment Reporting Information [Line Items]
Net Income (Loss)	(46,727)	(43,815)	(115,393)	(179,209)
Income Tax Expense	17,539	21,032	43,409	100,199
Interest Expense	3,148	5,121	10,508	19,503
Interest Income	(3,221)	(3,301)	(9,737)	(7,758)
Depreciation, Depletion and Amortization	7,324	6,948	24,750	27,056
Stock-Based Compensation	313	218	1,343	1,099
Merger-Related Expenses	10,979		10,979
Loss on Debt Extinguishment		662		2,725
Adjusted EBITDA	(10,645)	(13,135)	(34,141)	(36,385)
PAMC | Operating Segments
Segment Reporting Information [Line Items]
Net Income (Loss)	129,393	132,442	341,859	627,053
Income Tax Expense	0	0	0	0
Interest Expense	0	0	0	0
Interest Income	(1,795)	(723)	(4,408)	(1,644)
Depreciation, Depletion and Amortization	44,663	50,663	136,607	152,302
Stock-Based Compensation	1,645	1,408	7,627	7,108
Merger-Related Expenses	0		0
Loss on Debt Extinguishment		0		0
Adjusted EBITDA	173,906	183,790	481,685	784,819
CONSOL Marine Terminal | Operating Segments
Segment Reporting Information [Line Items]
Net Income (Loss)	12,966	12,098	29,118	50,981
Income Tax Expense	0	0	0	0
Interest Expense	1,516	1,524	4,555	4,576
Interest Income	0	0	0	0
Depreciation, Depletion and Amortization	1,342	1,181	3,816	3,513
Stock-Based Compensation	93	50	436	254
Merger-Related Expenses	0		0
Loss on Debt Extinguishment		0		0
Adjusted EBITDA	$ 15,917	$ 14,853	$ 37,925	$ 59,324