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Property, Plant and Equipment
12 Months Ended
Dec. 31, 2025
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
NOTE 10—PROPERTY, PLANT AND EQUIPMENT:
Property, plant and equipment consisted of the following:
 December 31,
 20252024
Plant and Equipment$4,876,926 $3,633,741 
Coal Properties and Surface Lands2,241,915 913,819 
Airshafts591,146 521,334 
Mine Development690,845 366,260 
Advance Mining Royalties329,970 328,927 
Total Property, Plant and Equipment8,730,802 5,764,081 
Less: Accumulated Depreciation, Depletion and Amortization4,343,920 3,842,382 
Total Property, Plant and Equipment - Net$4,386,882 $1,921,699 
As of December 31, 2025 and 2024, property, plant and equipment included gross assets under finance leases of $71,462 and $40,804, respectively. Accumulated amortization for finance leases was $15,230 and $16,929 at December 31, 2025 and 2024, respectively. Amortization expense for assets under finance leases was $13,147, $9,814 and $25,400 for the years ended December 31, 2025, 2024 and 2023, respectively, and is included in Depreciation, Depletion and Amortization in the accompanying Consolidated Statements of (Loss) Income. See Note 14—Leases for further discussion of finance leases.