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Employee Benefit Plans - Schedule of Amounts Recognized in Balance Sheet (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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SERP |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Other liabilities | $ (5,982) | $ (5,638)
Pension Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Other assets | $ 3,417 | $ 2,232

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