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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Statement of Comprehensive Income [Abstract]    
Unrealized (losses) gains during the period, income tax benefit (expense) $ 19 $ (191)
Reclassification adjustment for (gains) losses realized in net income, income tax expense (benefit) $ 10 $ (103)