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Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Statement of Comprehensive Income [Abstract]    
Unrealized gains (losses) during the period, income tax $ (240) $ 424
Reclassification adjustment for losses realized in net income, income tax $ (24) $ (15)