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Pension and Other Postretirement Employee Benefits (Components Of Net Periodic Cost (Benefit)) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Pension Plans [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 1,266 $ 1,321 $ 3,799 $ 3,964
Interest cost 3,230 3,124 9,688 9,369
Expected return on plan assets (2,933) (3,237) (8,798) (9,711)
Amortization of prior service cost 0 5 0 15
Amortization of actuarial (gain) loss 43 19 129 59
Total net periodic cost 1,606 1,232 4,818 3,696
OPEB [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 15 22 43 69
Interest cost 252 220 755 658
Expected return on plan assets 0 0 0 0
Amortization of prior service cost 0 0 0 0
Amortization of actuarial (gain) loss (241) (331) (721) (992)
Total net periodic cost $ 26 $ (89) $ 77 $ (265)