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Retirement Plans And Postretirement Benefits (Projected Future Pension Plan Cash Flow By Year) (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
U.S.  
Defined Benefit Plan Disclosure [Line Items]  
Expected employer contributions $ 4,419
Expected employee contributions 0
2017 9,271
2018 9,240
2019 9,195
2020 9,145
2021 9,012
2024-2028 43,077
Foreign [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Expected employer contributions 737
Expected employee contributions 0
2017 884
2018 870
2019 905
2020 1,038
2021 2,340
2024-2028 $ 9,168