Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 20,579	$ 3,737	$ 50,845
Other Comprehensive income (loss):
Change in unrealized gains (losses) on investment securities available-for-sale	(1,368)	4,515	(5,999)
Realized net gains reclassified from other comprehensive income	(475)	0	0
Tax effect on securities	629	(1,644)	2,279
Total other comprehensive income (loss)	(1,214)	2,871	(3,720)
Comprehensive income	$ 19,365	$ 6,608	$ 47,125