CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME
Net (loss) income	$ (11,785)	$ 6,454	$ (45,070)	$ 37,139
Unrealized gains (losses) on available-for-sale securities:
Unrealized gains (losses) during period, net of taxes	15	(14)	20	(25)
Net unrealized gains (losses) on available-for-sale securities	15	(14)	20	(25)
Comprehensive (loss) income	$ (11,770)	$ 6,440	$ (45,050)	$ 37,114