CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Comprehensive income:
Net income	$ 25,014	$ 24,348	$ 23,056
Other comprehensive income:
Net unrealized gain (loss) on securities available-for-sale	6,637	(10,644)	1,527
Tax effect	(2,465)	3,954	(567)
Reclassification adjustments for gains included in net income		(387)	(2,910)
Tax effect		144	1,081
FASB ASC 715 adjustment	(1,311)	(1,435)	6,256
Tax effect	487	531	(2,324)
Foreign currency translation adjustments	161	(42)	(96)
Total comprehensive income	$ 28,523	$ 16,469	$ 26,023