Condensed Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Condensed Consolidated Statements of Comprehensive Income (unaudited) [Abstract]
Net income	$ 6,373	$ 5,047	$ 16,911	$ 14,447
Securities available for sale
Unrealized gains arising during period	451	1,366	4,899	1,830
Change in unrealized gains for which a portion of other than temporary impairment has been recognized in earnings	(24)	10	47	0
Reclassification adjustments for gains included in earnings	(15)	0	(298)	(75)
Unrealized gains recognized in other comprehensive income on securities available for sale	412	1,376	4,648	1,755
Income tax expense	144	482	1,627	615
Unrealized gains recognized in other comprehensive income on available for sale securities, net of tax	268	894	3,021	1,140
Other comprehensive income	268	894	3,021	1,140
Comprehensive income	$ 6,641	$ 5,941	$ 19,932	$ 15,587