Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 9,209	$ 4,504	$ 17,467	$ 4,755
Securities available-for-sale:
Net unrealized gains (losses) arising during the period, net of tax	1,014	3,221	1,276	12,198
Less: amortization of net unrealized holding gains to income, net of tax	(353)	(495)	(710)	(1,015)
Other comprehensive income (loss)	661	2,726	566	11,183
Comprehensive income (loss)	$ 9,870	$ 7,230	$ 18,033	$ 15,938