Revenue Recognition - Schedule of revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 3,145,843	$ 3,724,593	$ 2,208,042
North America revenues
Disaggregation of Revenue [Line Items]
Revenues	1,372,316	1,413,141	1,059,003
Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	1,773,527	2,311,452	1,149,039
Operating Segments | MET
Disaggregation of Revenue [Line Items]
Revenues	1,892,326	2,157,710	1,149,133
Operating Segments | MET | North America revenues
Disaggregation of Revenue [Line Items]
Revenues	342,070	232,831	163,833
Operating Segments | MET | Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	1,550,256	1,924,879	985,300
Operating Segments | Thermal
Disaggregation of Revenue [Line Items]
Revenues	1,253,517	1,566,883	1,057,480
Operating Segments | Thermal | North America revenues
Disaggregation of Revenue [Line Items]
Revenues	1,030,246	1,180,310	893,741
Operating Segments | Thermal | Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	223,271	386,573	163,739
Corporate, Other and Eliminations
Disaggregation of Revenue [Line Items]
Revenues	0	0	1,429
Corporate, Other and Eliminations | North America revenues
Disaggregation of Revenue [Line Items]
Revenues	0	0	1,429
Corporate, Other and Eliminations | Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 0	$ 0