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Employee Benefit Plans (Expected Benefit Payments) (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
2018 $ 23,724
2019 23,451
2020 23,134
2021 22,834
2022 22,358
2024-2028 103,857
Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2018 23,055
2019 22,799
2020 22,516
2021 22,238
2022 21,789
2024-2028 101,297
Other Postretirement Benefits Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2018 669
2019 652
2020 618
2021 596
2022 569
2024-2028 $ 2,560