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Consolidated Statements of Income (unaudited) (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Income Statement [Abstract] |  |  |  |
Accumulated other comprehensive income reclassification for change in fair value of interest rate swap agreements | $ 62 | $ 65 | $ 131 | $ 86
Accumulated other comprehensive income reclassifications for net realized gains on available-for-sale securities | 0 | 2,190 | 0 | 2,190
Income tax expense from reclassification | $ (14) | $ 446 | $ (28) | $ 442

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