CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 16,196	$ (20,584)	$ 8,074	$ 25,578
Unrealized gains (losses) on securities:
Holding gains (losses) arising during period, net of tax	(336)	228	811	(107)
Reclassification adjustment for gains (losses) included in net income (loss)	0	0	0	4
Net unrealized gains (losses) on securities	(336)	228	811	(103)
Total comprehensive income (loss)	$ 15,860	$ (20,356)	$ 8,885	$ 25,475