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Retirement Plans And Other Postretirement Benefits (Schedule Of Expected Benefit Payments For Continuing Operations) (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
Pension Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2017 $ 16,378
2018 16,916
2019 17,403
2020 17,762
2021 18,075
2022-2026 92,799
Other Post-Retirement Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2017 457
2018 461
2019 462
2020 466
2021 469
2022-2026 $ 2,299