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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Statement of Comprehensive Income [Abstract]        
Unrealized gains (losses) during the period, income tax $ (52) $ (51) $ 372 $ (32)
Reclassification adjustment for losses realized in net income, income tax $ (31) $ (53) $ (46) $ (43)