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Employee Benefit Plans - Net Periodic Benefit Cost Not yet Recognized (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Pension      
Defined Benefit Plan Disclosure [Line Items]      
Prior service cost (credit) $ (3,600) $ (3,852) $ (1,204)
Net gain (loss) (37,097) (50,796) (67,770)
Curtailment 0 0 8,000
Deferred income tax (expense) benefit 9,664 12,630 13,750
Accumulated other comprehensive income (loss) (31,033) (42,018) (47,224)
Postretirement      
Defined Benefit Plan Disclosure [Line Items]      
Prior service cost (credit) 561 659 757
Net gain (loss) 12,341 10,343 3,920
Curtailment 0 0 0
Deferred income tax (expense) benefit (2,929) (2,521) (1,147)
Accumulated other comprehensive income (loss) $ 9,973 $ 8,481 $ 3,530