v3.26.1
INCOME TAXES - Income taxes computed at the federal statutory rate (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income tax expense (benefit), effective income tax rate reconciliation, Amount      
Income taxes computed at the federal statutory rate $ (13,049) $ 3,134 $ 21,938
State taxes, net of federal benefits $ (938) $ 214 $ 1,210
Effective Income Tax Rate Reconciliation, State and Local Jurisdiction, Contribution Greater than 50 Percent, Tax Effect [Extensible Enumeration] WEST VIRGINIA WEST VIRGINIA WEST VIRGINIA
Effect of changes in tax laws or rates $ 1,449 $ (166) $ 350
Nontaxable or nondeductible items      
Percentage depletion (1,600) (2,410) (1,717)
162(m) compensation limitation 2,126 6,172 5,716
Stock-based compensation 504 (3,299) (3,395)
Other 317 397 210
Tax credits (21) (170)
Effect of cross-border tax laws      
IRC 250 FDII   (1,475)
Other adjustments 497 (293) (317)
Total $ (10,694) $ 3,728 $ 22,350
Tax Jurisdiction of Domicile [Extensible Enumeration] UNITED STATES UNITED STATES UNITED STATES
Tax reconciliation, percent      
Income taxes computed at the federal statutory rate 21.00% 21.00% 21.00%
State taxes, net of federal benefits 1.50% 1.40% 1.20%
Effect of changes in tax laws or rates (2.30%) (1.10%) 0.30%
Nontaxable or nondeductible items      
Percentage depletion 2.60% (16.10%) (1.60%)
162(m) compensation limitation (3.40%) 41.40% 5.50%
Stock-based compensation (0.80%) (22.10%) (3.30%)
Other (0.50%) 2.70% 0.20%
Tax credits 0.00% (0.10%) (0.20%)
Effect of cross-border tax laws      
IRC 250 FDII 0.00%   (1.40%)
Other adjustments (0.90%) (2.00%) (0.30%)
Total 17.20% 25.00% 21.40%