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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2023
Property, Plant and Equipment [Abstract]  
Schedule of Property, Plant and Equipment
Property, plant and equipment consists of the following:
 December 31,
 20232022
Plant and Equipment$3,458,655 $3,330,755 
Coal Properties and Surface Lands906,343 898,628 
Airshafts492,806 481,090 
Mine Development366,260 366,241 
Advance Mining Royalties328,340 331,863 
Total Property, Plant and Equipment5,552,404 5,408,577 
Less: Accumulated Depreciation, Depletion and Amortization3,649,281 3,448,495 
Total Property, Plant and Equipment - Net$1,903,123 $1,960,082