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Employee Benefit Plans - Amounts Recognized in Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Pension      
Net gains or losses recognized in other comprehensive income      
Net gain $ 13,053 $ 9,202 $ 30,531
Prior service costs 0 (2,982) 0
Net gains or losses and prior service costs or credits reclassified from other comprehensive income      
Amortization of (gain) loss 379 (490) 5,462
Amortization of prior service cost (credit) 435 294 147
Postretirement      
Net gains or losses recognized in other comprehensive income      
Net gain 2,928 6,639 7,574
Prior service costs 0 0 0
Net gains or losses and prior service costs or credits reclassified from other comprehensive income      
Amortization of (gain) loss (737) (215) 72
Amortization of prior service cost (credit) $ (98) $ (98) $ (122)