CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 18,784	$ 15,422	$ 50,433	$ 38,239
Unrealized net gains (losses) on securities:
Unrealized net holding gains (losses) arising during period	563	(2,017)	1,864	8,582
Reclassification adjustment for (gains) included in net income	(290)	(11)	(1,143)	(1,230)
Other comprehensive income (loss), before tax	273	(2,028)	721	7,352
Income tax expense (benefit) related to items of other comprehensive income	119	(815)	298	2,934
Other comprehensive income (loss), net of tax	154	(1,213)	423	4,418
Comprehensive income	$ 18,938	$ 14,209	$ 50,856	$ 42,657