Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 9,128	$ 4,698	$ 16,994	$ 15,093
Other comprehensive income:
Unrealized (loss) gain on securities (net of tax benefit of $27 and tax expense of $10 in 2016, and net of tax expense of $27 and $125 in 2015, respectively)	(39)	40	14	181
Accretion of unrealized loss on securities reclassified to held-to-maturity (net of tax expense of $153 and $431 in 2016 and $152 and $415 in 2015, respectively)	221	221	623	602
Reclassification adjustment for losses included in net income (net of tax benefit of $5 in 2016)			(7)
Total comprehensive income	$ 9,310	$ 4,959	$ 17,624	$ 15,876