Revenue Recognition - Schedule of revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 3,724,593	$ 2,208,042	$ 1,467,592
North America revenues
Disaggregation of Revenue [Line Items]
Revenues	1,413,141	1,059,003	970,662
Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	2,311,452	1,149,039	496,930
Operating Segments | MET
Disaggregation of Revenue [Line Items]
Revenues	2,157,710	1,149,133	641,536
Operating Segments | MET | North America revenues
Disaggregation of Revenue [Line Items]
Revenues	232,831	163,833	173,508
Operating Segments | MET | Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	1,924,879	985,300	468,028
Operating Segments | Thermal
Disaggregation of Revenue [Line Items]
Revenues	1,566,883	1,057,480	801,632
Operating Segments | Thermal | North America revenues
Disaggregation of Revenue [Line Items]
Revenues	1,180,310	893,741	772,730
Operating Segments | Thermal | Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	386,573	163,739	28,902
Corporate, Other and Eliminations
Disaggregation of Revenue [Line Items]
Revenues	0	1,429	24,424
Corporate, Other and Eliminations | North America revenues
Disaggregation of Revenue [Line Items]
Revenues	0	1,429	24,424
Corporate, Other and Eliminations | Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 0	$ 0