Segment Information - Schedule of Segment Reporting Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	$ 546,689	$ 677,597
Adjusted EBITDA	181,753	346,300
Segment Assets	2,680,124	2,695,311	$ 2,675,003
Depreciation, Depletion and Amortization	56,997	59,551
Capital Expenditures	42,352	33,757
Coal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	447,927	583,379
Terminal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	24,528	26,711
Freight Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	69,842	67,507
Other Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	4,392
Other, Corporate and Eliminations
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	39,074	23,212
Adjusted EBITDA	(4,420)	(5,278)
Segment Assets	984,456	925,360
Depreciation, Depletion and Amortization	7,487	7,024
Capital Expenditures	4,331	6,375
Other, Corporate and Eliminations | Coal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	31,740	20,042
Other, Corporate and Eliminations | Terminal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	0	0
Other, Corporate and Eliminations | Freight Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	2,942	3,170
Other, Corporate and Eliminations | Other Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	4,392
PAMC | Operating Segments
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	483,087	627,674
Adjusted EBITDA	169,333	330,963
Segment Assets	1,612,850	1,687,932
Depreciation, Depletion and Amortization	48,269	51,371
Capital Expenditures	36,958	26,807
PAMC | Operating Segments | Coal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	416,187	563,337
PAMC | Operating Segments | Terminal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	0	0
PAMC | Operating Segments | Freight Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	66,900	64,337
PAMC | Operating Segments | Other Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	0
CONSOL Marine Terminal | Operating Segments
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	24,528	26,711
Adjusted EBITDA	16,840	20,615
Segment Assets	82,818	82,019
Depreciation, Depletion and Amortization	1,241	1,156
Capital Expenditures	1,063	575
CONSOL Marine Terminal | Operating Segments | Coal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	0	0
CONSOL Marine Terminal | Operating Segments | Terminal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	24,528	26,711
CONSOL Marine Terminal | Operating Segments | Freight Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	0	$ 0
CONSOL Marine Terminal | Operating Segments | Other Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	$ 0