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Inventories, net
3 Months Ended
Mar. 31, 2024
Inventory Disclosure [Abstract]  
Inventories, net Inventories, net
Inventories, net consisted of the following: 
 March 31, 2024December 31, 2023
Raw coal$51,602 $52,508 
Saleable coal130,071 120,000 
Materials, supplies and other, net
64,360 58,836 
Total inventories, net$246,033 $231,344