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Inventories, net (Tables)
3 Months Ended
Mar. 31, 2025
Inventory Disclosure [Abstract]  
Schedule of Inventories, Net
Inventories, net consisted of the following: 
 March 31, 2025December 31, 2024
Raw coal$41,429 $39,689 
Saleable coal82,319 65,129 
Materials, supplies and other, net
66,345 64,451 
Total inventories, net$190,093 $169,269