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Employee Benefit Plans (Schedule of Estimated Future Benefit Payments) (Details) $ in Thousands | Dec. 31, 2019 USD ($)
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Supplemental Executive Retirement Plan [Member] |
Expected future benefit payments under the plans: |
2017 | $ 486
2018 | 536
2019 | 566
2020 | 526
2021 | 436
2022- 2026 | 2,141
Other Postretirement Benefits Plan [Member] |
Expected future benefit payments under the plans: |
2017 | 268
2018 | 265
2019 | 233
2020 | 219
2021 | 231
2022- 2026 | $ 1,084

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