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Derivatives (Effects of Derivatives on Consolidated Statements of Income) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Interest Rate Swap | Other Operating Income |  |
Derivative [Line Items] |  |
Included in Other Operating Income | $ 485 | $ (280)

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