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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 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]          
Pension settlement loss $ 0 $ 25,612 $ 0 $ 25,612 $ 92,300
Pension Benefits          
Defined Benefit Plan Disclosure [Line Items]          
Service cost 0 0 0 0  
Interest cost 20 2,786 57 8,842  
Expected return on plan assets 0 (2,328) 0 (7,542)  
Pension settlement loss 0 25,612 0 25,612  
Amortization of prior service costs, (gains) losses and net transition asset 3 2,644 15 8,609  
Net periodic benefit cost 23 28,714 72 35,521  
Other Post-Retirement Benefits          
Defined Benefit Plan Disclosure [Line Items]          
Service cost 3 3 8 9  
Interest cost 65 71 203 213  
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 (37) (58) (120) (176)  
Net periodic benefit cost $ 31 $ 16 $ 91 $ 46