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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Statement of Comprehensive Income [Abstract]        
Unrealized gain (loss) on securities, tax expense (benefit) $ 55 $ 489 $ (46) $ (207)
Accretion of unrealized loss (gain) on securities reclassified to held-to-maturity, tax expense $ 86 $ 257 $ 336 854
Reclassification adjustment for gains included in net income, tax expense       $ 53