Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Comprehensive Income [Abstract]
Unrealized gains on available-for-sale securities, taxes	$ (1,709)	$ (1,073)	$ (1,662)	$ (4,605)
Unamortized holding losses on held to maturity securities transferred from available for sale, taxes	(51)	540	(176)	540
Other Comprehensive Income Loss Reclassification Adjustment For Sale Or Writedown Of Securities Included In Net Income Tax	$ 0	$ (8)	$ 90	$ 278