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Pension Plans and Other Postretirement Benefits (Expected Benefit Payments) (Details)
$ in Thousands
Dec. 31, 2020
USD ($)
Pension Benefits | United States  
Defined Benefit Plan Disclosure [Line Items]  
2021 $ 13,671
2022 14,523
2023 15,475
2024 16,527
2025 17,588
2026 through 2030 103,131
Pension Benefits | Foreign Retirement Plans  
Defined Benefit Plan Disclosure [Line Items]  
2021 6,461
2022 4,726
2023 6,566
2024 8,517
2025 6,941
2026 through 2030 38,075
Postretirement Benefits | United States  
Defined Benefit Plan Disclosure [Line Items]  
2021 2,338
2022 2,203
2023 2,096
2024 1,994
2025 1,940
2026 through 2030 $ 9,235