Segment Information - Schedule of Segment Reporting Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	$ 490,720	$ 654,023	$ 1,037,409	$ 1,331,620
Adjusted EBITDA	124,538	275,950	306,291	622,250
Segment Assets	2,710,454	2,678,349	2,710,454	2,678,349	$ 2,675,003
Depreciation, Depletion and Amortization	54,847	64,528	111,844	124,079
Capital Expenditures	55,408	42,325	97,760	76,082
Coal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	409,322	541,099	857,249	1,124,478
Terminal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	12,020	31,368	36,548	58,079
Freight Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	65,640	81,556	135,482	149,063
Other Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	3,738		8,130
Other, Corporate and Eliminations
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	30,808	23,597	69,882	46,809
Adjusted EBITDA	(19,076)	(17,971)	(23,496)	(23,250)
Segment Assets	959,546	913,905	959,546	913,905
Depreciation, Depletion and Amortization	9,939	13,084	17,426	20,108
Capital Expenditures	4,628	3,706	8,959	10,081
Other, Corporate and Eliminations | Coal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	24,880	19,923	56,620	39,965
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	2,190	3,674	5,132	6,844
Other, Corporate and Eliminations | Other Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	3,738		8,130
PAMC | Operating Segments
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	447,892	599,058	930,979	1,226,732
Adjusted EBITDA	138,446	270,065	307,779	601,029
Segment Assets	1,665,463	1,682,118	1,665,463	1,682,118
Depreciation, Depletion and Amortization	43,675	50,268	91,944	101,639
Capital Expenditures	47,043	37,495	84,001	64,302
PAMC | Operating Segments | Coal Revenue
Segment Reporting Information [Line Items]
Total Revenue from Contracts with Customers	384,442	521,176	800,629	1,084,513
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	63,450	77,882	130,350	142,219
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	12,020	31,368	36,548	58,079
Adjusted EBITDA	5,168	23,856	22,008	44,471
Segment Assets	85,445	82,326	85,445	82,326
Depreciation, Depletion and Amortization	1,233	1,176	2,474	2,332
Capital Expenditures	3,737	1,124	4,800	1,699
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	12,020	31,368	36,548	58,079
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