Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 23,046	$ 20,322	$ 19,920
Other comprehensive income:
Unrealized (loss) gain on securities (net of tax benefit of $128 in 2016, tax expense of $38 in 2015, and tax benefit of $415 in 2014)	(186)	55	(601)
Reclassification adjustment for losses (gains) included in net income (net of tax benefit of $5 in 2016 and tax expense of $421 in 2014, respectively)	7	0	(610)
Accretion of unrealized loss on securities reclassified to held-to- maturity (net of tax expense of $556, $562 and $497 in 2016, 2015 and 2014, respectively)	806	813	721
Total other comprehensive income (loss)	627	868	(490)
Total comprehensive income	$ 23,673	$ 21,190	$ 19,430