Revenue Recognition - Schedule of revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 617,899	$ 744,601	$ 1,906,840	$ 2,371,826
North America revenues
Disaggregation of Revenue [Line Items]
Revenues	297,302	360,654	789,845	1,060,128
Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	320,597	383,947	1,116,995	1,311,698
Operating Segments | MET
Disaggregation of Revenue [Line Items]
Revenues	361,916	432,835	1,154,938	1,420,758
Operating Segments | MET | North America revenues
Disaggregation of Revenue [Line Items]
Revenues	76,254	108,895	179,051	274,017
Operating Segments | MET | Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	285,662	323,940	975,887	1,146,741
Operating Segments | Thermal
Disaggregation of Revenue [Line Items]
Revenues	255,983	311,766	751,902	951,068
Operating Segments | Thermal | North America revenues
Disaggregation of Revenue [Line Items]
Revenues	221,048	251,759	610,794	786,111
Operating Segments | Thermal | Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	34,935	60,007	141,108	164,957
Corporate, Other and Eliminations
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Corporate, Other and Eliminations | North America revenues
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Corporate, Other and Eliminations | Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 0	$ 0	$ 0