Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income	$ 48,190	$ 48,837	$ 38,450
Other comprehensive loss, net of tax:
Unrealized losses on investment securities arising during the period, net of income tax benefit of $1,265, $1,168, and $899, respectively	(2,064)	(1,906)	(1,449)
Less: Reclassification adjustment for realized gains on sale of securities available for sale included in net income, net of income tax expense of $9, $33, and $9, respectively	(13)	(53)	(14)
Total other comprehensive loss	(2,077)	(1,959)	(1,463)
Total comprehensive income	$ 46,113	$ 46,878	$ 36,987