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Pension and Other Postretirement Employee Benefits (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Defined Benefit Plan Disclosure [Line Items]    
Funding of pension and other postretirement benefit plans $ 1,580 $ 914
Non-Qualified Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Funding of pension and other postretirement benefit plans 900 900
Qualified Plan [Member] | Pension Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Contributions to pension benefit plan $ 700 $ 0