Segment Information - Schedule of Segment Reporting Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	$ 553,432	$ 540,666	$ 1,590,841	$ 1,872,286
Adjusted EBITDA	179,178	185,508	485,469	807,758
Segment Assets	2,824,117	2,659,515	2,824,117	2,659,515	$ 2,675,003
Depreciation, Depletion and Amortization	53,329	58,792	165,173	182,871
Capital Expenditures	39,388	41,667	137,148	117,749
Coal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	462,489	449,618	1,319,738	1,574,096
Terminal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	23,740	22,676	60,288	80,755
Freight Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	63,406	68,372	198,888	217,435
Other Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	3,797		11,927
Other, Corporate and Eliminations
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	27,743	22,393	97,625	69,203
Adjusted EBITDA	(10,645)	(13,135)	(34,141)	(36,385)
Segment Assets	957,594	959,869	957,594	959,869
Depreciation, Depletion and Amortization	7,324	6,948	24,750	27,056
Capital Expenditures	5,840	3,633	14,799	13,714
Other, Corporate and Eliminations | Coal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	22,759	18,528	79,379	58,493
Other, Corporate and Eliminations | Terminal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	0	0	0	0
Other, Corporate and Eliminations | Freight Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	1,187	3,865	6,319	10,710
Other, Corporate and Eliminations | Other Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	3,797		11,927
PAMC | Operating Segments
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	501,949	495,597	1,432,928	1,722,328
Adjusted EBITDA	173,906	183,790	481,685	784,819
Segment Assets	1,778,921	1,616,224	1,778,921	1,616,224
Depreciation, Depletion and Amortization	44,663	50,663	136,607	152,302
Capital Expenditures	30,743	35,404	114,744	99,706
PAMC | Operating Segments | Coal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	439,730	431,090	1,240,359	1,515,603
PAMC | Operating Segments | Terminal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	0	0	0	0
PAMC | Operating Segments | Freight Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	62,219	64,507	192,569	206,725
PAMC | Operating Segments | Other Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	0		0
CONSOL Marine Terminal | Operating Segments
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	23,740	22,676	60,288	80,755
Adjusted EBITDA	15,917	14,853	37,925	59,324
Segment Assets	87,602	83,422	87,602	83,422
Depreciation, Depletion and Amortization	1,342	1,181	3,816	3,513
Capital Expenditures	2,805	2,630	7,605	4,329
CONSOL Marine Terminal | Operating Segments | Coal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	0	0	0	0
CONSOL Marine Terminal | Operating Segments | Terminal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	23,740	22,676	60,288	80,755
CONSOL Marine Terminal | Operating Segments | Freight Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	0	$ 0	0	$ 0
CONSOL Marine Terminal | Operating Segments | Other Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	$ 0		$ 0