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Inventories (Tables)
6 Months Ended
Jun. 30, 2024
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories are summarized as follows:
 JUNE 30
2024
 DECEMBER 31
2023
Coal and aggregates$24,637 $23,784 
Mining supplies58,762 53,216 
 Total inventories$83,399  $77,000