Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 20,322	$ 19,920	$ 16,330
Other comprehensive income:
Unrealized gain (loss) on securities (net of tax expense of $38 in 2015, and tax benefit of $415 in 2014 and $4,674 in 2013)	55	(601)	(6,768)
Reclassification adjustment for gains included in net income (net of tax expense of $0, $421 and $19 in 2015, 2014 and 2013, respectively)		(610)	(27)
Accretion of unrealized loss on securities reclassified to held-to-maturity (net of tax expense of $562, $497 and $88 in 2015, 2014 and 2013, respectively)	813	721	127
Total other comprehensive income (loss)	868	(490)	(6,668)
Total comprehensive income	$ 21,190	$ 19,430	$ 9,662