v3.26.3
Components of Pension and Other Postretirement Benefit Plans Net Periodic Benefit Costs (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Pension Benefits        
Defined Contribution Plan Disclosure [Line Items]        
Service Cost $ 300 $ 275 $ 900 $ 825
Interest Cost 5,730 6,343 17,189 19,028
Expected Return on Plan Assets (7,478) (7,565) (22,436) (22,695)
Amortization of Prior Service Credits 0 0 0 0
Recognized Net Actuarial Loss (Gain) 2,468 2,159 7,403 6,475
Net Periodic Benefit Cost 1,020 1,212 3,056 3,633
Other Postretirement Benefits        
Defined Contribution Plan Disclosure [Line Items]        
Service Cost 29 38 86 108
Interest Cost 2,347 2,992 7,041 8,884
Expected Return on Plan Assets 0 0 0 0
Amortization of Prior Service Credits (601) (601) (1,804) (1,803)
Recognized Net Actuarial Loss (Gain) (1,020) (683) (3,059) (2,052)
Net Periodic Benefit Cost $ 755 $ 1,746 $ 2,264 $ 5,137