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Inventories, net (Tables)
6 Months Ended
Jun. 30, 2022
Inventory Disclosure [Abstract]  
Schedule of Inventories, Net
Inventories, net summarized as of June 30, 2022 and December 31, 2021 are as follows (in thousands):
 June 30, 2022December 31, 2021
Coal$96,311 $24,185 
Raw materials, parts, supplies and other, net44,107 35,434 
Total inventories, net$140,418 $59,619