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Employee Benefit Plans - Future Benefit Payments Under Pension Plans (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Pension Plan  
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
2020 $ 1,252
2021 1,339
2022 1,452
2023 1,495
2024 1,607
2025 - 2029 9,002
Retirement Plan  
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
2020 589
2021 569
2022 545
2023 517
2024 486
2025 - 2029 $ 2,012