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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Statement of Comprehensive Income [Abstract]    
Unrealized gains during the period, income tax benefit (expense) $ (191) $ (25)
Reclassification adjustment for losses (gains) realized in net income, income tax (benefit) expense $ (103) $ 52