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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, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 0 $ 0 $ 0 $ 0
Interest cost 2,226 2,101 6,676 6,305
Expected return on plan assets (2,044) (2,862) (6,141) (8,587)
Amortization of prior service costs, (gains) losses and net transition asset 3,301 4,268 9,887 12,799
Net periodic benefit cost 3,483 3,507 10,422 10,517
Other Post-Retirement Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 5 9 15 26
Interest cost 51 50 153 151
Expected return on plan assets 0 0 0 0
Amortization of prior service costs, (gains) losses and net transition asset (33) (24) (101) (72)
Net periodic benefit cost $ 23 $ 35 $ 67 $ 105