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Pension and Other Postretirement Benefits (Details 9)
$ in Thousands
Dec. 31, 2019
USD ($)
Pensions [Member]  
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]  
2020 $ 29,543
2021 29,523
2022 29,558
2023 29,123
2024 29,382
Years 2025-2029 145,516
Total 292,645
Other Postretirement Benefits [Member]  
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]  
2020 3,336
2021 3,154
2022 2,918
2023 2,704
2024 2,520
Years 2025-2029 10,336
Total $ 24,968