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Consolidated Statements of Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Income Statement [Abstract]    
Accumulated other comprehensive income reclassification for change in fair value of interest rate swap agreements $ 58 $ 76
Accumulated other comprehensive income reclassifications for net realized gains on available-for-sale securities 0 1,383
Income tax expense from reclassification $ 12 $ 457