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Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Statement of Comprehensive Income [Abstract]        
Unrealized gains (losses) on available-for-sale securities, taxes $ 25 $ 88 $ 257 $ 5
Unrealized losses on hedging derivatives, taxes $ 20 $ 2 $ 65 $ 203