Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Comprehensive Income [Abstract]
Unrealized gains on available-for-sale securities, taxes	$ (690)	$ (1,709)	$ (3,698)	$ (1,662)
Unamortized holding losses on held to maturity securities transferred from available for sale, taxes	(11)	(51)	(161)	(176)
Other Comprehensive Income Loss Reclassification Adjustment For Sale Or Writedown Of Securities Included In Net Income Tax	$ 182	$ 0	$ 440	$ 90