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Benefit Plans - Defined Benefit Plans - Estimated Benefit Payments over the Next Ten Years (Details) - Supplemental Retirement Plan
$ in Thousands
Dec. 31, 2019
USD ($)
Estimated Benefit Payments  
2020 $ 1,509
2021 1,717
2022 1,863
2023 1,974
2024 2,011
2025 to 2029 11,366
Total $ 20,440