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Pension And Other Post-Retirement Benefits (Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Defined Benefit Plan Disclosure [Line Items]        
Pension settlement loss $ 25,612 $ 0 $ 25,612 $ 0
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 0 0 0 0
Interest cost 2,786 2,226 8,842 6,676
Expected return on plan assets (2,328) (2,044) (7,542) (6,141)
Pension settlement loss 25,612 0 25,612 0
Amortization of prior service costs, (gains) losses and net transition asset 2,644 3,301 8,609 9,887
Net periodic benefit cost 28,714 3,483 35,521 10,422
Other Post-Retirement Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 3 5 9 15
Interest cost 71 51 213 153
Expected return on plan assets 0 0 0 0
Pension settlement loss 0 0 0 0
Amortization of prior service costs, (gains) losses and net transition asset (58) (33) (176) (101)
Net periodic benefit cost $ 16 $ 23 $ 46 $ 67