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Retirement Plans And Other Postretirement Benefits (Schedule Of Expected Benefit Payments For Continuing Operations) (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Pension Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2017 $ 17,162
2018 17,524
2019 17,895
2020 18,088
2021 18,325
2022-2026 91,383
Other Post-Retirement Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2017 470
2018 473
2019 473
2020 468
2021 463
2022-2026 $ 2,202