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Pension Plans And Other Postretirement Benefits (Components Of Net Periodic Benefit Cost) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Pension Benefits [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 304 $ 358 $ 912 $ 1,072
Interest cost 3,991 3,908 11,973 11,724
Expected return on plan assets (4,266) (4,696) (12,798) (14,088)
Amortization of prior service cost 78 82 234 244
Amortization of actuarial loss (gain) 833 751 2,499 2,253
Net periodic benefit cost 940 403 2,820 1,205
Other Postretirement Benefits [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 372 363 1,116 1,089
Interest cost 1,132 1,113 3,396 3,337
Expected return on plan assets (1,071) (1,105) (3,213) (3,315)
Amortization of actuarial loss (gain) (401) (267) (1,203) (801)
Net periodic benefit cost $ 32 $ 104 $ 96 $ 310