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Benefit Plans - Reconciliation of Amounts in Accumulated Other Comprehensive Loss That Have Not Yet Been Recognized as Components of Net Periodic Benefit Cost (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
USD ($)
Actuarial loss  
Actuarial Gain (Loss) $ (4,955)
Pension plan settlement  
Settlement expense, beginning balance 0
Settlement expense, reclassification adjustments 112,796
Settlement expense, actuarial gain (loss) 0
Settlement expense, ending balance 112,796
Total within accumulated other comprehensive loss  
Net periodic benefit cost, beginning balance (116,948)
Reclassification Adjustments 114,758
Net periodic benefit cost, ending balance (7,145)
Pension Plans  
Actuarial loss  
Actuarial loss, beginning balance (117,560)
Actuarial Gain (Loss) 3,036
Reclassification Adjustments 1,946
Actuarial loss, ending balance (112,578)
Prior service costs  
Prior service costs, beginning balance (158)
Actuarial Gain (Loss) (5)
Reclassification Adjustments 16
Prior service costs, ending balance (147)
Postretirement Benefits  
Actuarial loss  
Actuarial loss, beginning balance 770
Actuarial Gain (Loss) (7,986)
Reclassification Adjustments 0
Actuarial loss, ending balance $ (7,216)