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Employee Benefit Plans (Future Benefit Payments) (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Supplemental Employee Retirement Plan  
Defined Benefit Plan Disclosure [Line Items]  
2020 $ 0
2021 7,644
2022 0
2023 0
2024 51,155
2025 - 2029 0
Pension Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2020 7,548
2021 14,708
2022 6,614
2023 6,200
2024 56,959
2025 - 2029 23,303
Postretirement Medical  
Defined Benefit Plan Disclosure [Line Items]  
2020 655
2021 651
2022 650
2023 644
2024 640
2025 - 2029 $ 2,897