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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Statement of Comprehensive Income [Abstract]    
Unrealized gain (loss) on securities, tax expense (benefit) $ 175 $ (85)
Accretion of unrealized loss on securities reclassified to held-to-maturity, tax expense $ 86 57
Reclassification adjustment for losses included in net income, tax benefit   $ 1