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Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Dec. 31, 2025
--- | --- | ---
Payables and Accruals [Abstract] |  |
Wages and benefits | $ 57,625 | $ 46,687
Workers’ compensation | 8,880 | 8,880
Black lung | 12,329 | 12,329
Taxes other than income taxes | 23,984 | 26,315
Asset retirement obligations | 28,874 | 22,632
Freight accrual | 11,054 | 12,018
Other | 20,600 | 6,917
Total accrued expenses and other current liabilities | $ 163,346 | $ 135,778

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