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Benefit Plans - Components of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Pension    
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial loss (gain) $ 13,519 $ 31,227
Prior service cost 145 180
Deferred tax (benefit) expense (3,787) (8,630)
Total 9,877 22,777
OPEB    
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial loss (gain) (8) (749)
Prior service cost 0 0
Deferred tax (benefit) expense 4 206
Total $ (4) $ (543)