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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Current Assets:    
Cash and cash equivalents $ 94,481 $ 136,962
Trade receivables (net of allowance of $5,260 and $2,087, respectively) 169,883 166,829
Other receivables 2,272 10,158
Inventories, net 130,636 120,661
Advance royalties 9,537 11,422
Digital assets 64,809 45,037
Prepaid expenses and other assets 14,494 22,161
Total current assets 486,112 513,230
Property, Plant and Equipment:    
Property, plant and equipment 4,511,236 4,435,535
Less accumulated depreciation, depletion and amortization (2,347,584) (2,269,265)
Total property, plant and equipment, net 2,163,652 2,166,270
Other Assets:    
Advance royalties 75,788 70,264
Equity method investments 54,582 35,532
Equity securities 67,541 92,541
Debt securities 13,193 0
Operating lease right-of-use assets 17,631 15,871
Other long-term assets 29,842 22,022
Total other assets 258,577 236,230
Total Assets 2,908,341 2,915,730
Current Liabilities:    
Accounts payable 103,757 98,188
Accrued taxes other than income taxes 24,566 21,051
Accrued payroll and related expenses 36,318 26,946
Accrued interest 10,660 1,821
Workers' compensation and pneumoconiosis benefits 14,815 14,838
Other current liabilities 42,131 48,023
Current maturities, long-term debt, net 23,361 22,275
Total current liabilities 255,608 233,142
Long-Term Liabilities:    
Long-term debt, excluding current maturities, net 433,117 450,885
Pneumoconiosis benefits 124,794 120,152
Workers' compensation 38,943 37,177
Asset retirement obligations 157,753 155,156
Long-term operating lease obligations 15,068 13,638
Deferred income tax liabilities 27,417 29,353
Other liabilities 24,584 22,694
Total long-term liabilities 821,676 829,055
Total liabilities 1,077,284 1,062,197
Commitments and Contingencies
ARLP Partners' Capital:    
Limited Partners - Common Unitholders 128,428,024 and 128,061,981 units outstanding, respectively 1,836,401 1,867,850
Accumulated other comprehensive loss (24,039) (35,103)
Total ARLP Partners' Capital 1,812,362 1,832,747
Noncontrolling interest 18,695 20,786
Total Partners' Capital 1,831,057 1,853,533
Total Liabilities and Partners' Capital $ 2,908,341 $ 2,915,730