Revenue Recognition - Schedule of revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 863,835	$ 594,412	$ 2,865,129	$ 1,402,345
North America revenues
Disaggregation of Revenue [Line Items]
Revenues	377,551	300,634	1,031,735	738,617
Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	486,284	293,778	1,833,394	663,728
Operating Segments | MET
Disaggregation of Revenue [Line Items]
Revenues	444,306	295,291	1,640,970	693,522
Operating Segments | MET | North America revenues
Disaggregation of Revenue [Line Items]
Revenues	70,491	52,654	125,906	124,782
Operating Segments | MET | Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	373,815	242,637	1,515,064	568,740
Operating Segments | Thermal
Disaggregation of Revenue [Line Items]
Revenues	419,529	299,096	1,224,159	707,394
Operating Segments | Thermal | North America revenues
Disaggregation of Revenue [Line Items]
Revenues	307,060	247,955	905,829	612,406
Operating Segments | Thermal | Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	112,469	51,141	318,330	94,988
Corporate, Other and Eliminations
Disaggregation of Revenue [Line Items]
Revenues	0	25	0	1,429
Corporate, Other and Eliminations | North America revenues
Disaggregation of Revenue [Line Items]
Revenues	0	25	0	1,429
Corporate, Other and Eliminations | Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 0	$ 0	$ 0