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
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ 15,033	$ (4,584)	$ 34,065	$ (23,061)
Other comprehensive income:
Unrealized gain on marketable securities, net	2	21	11	1,302
Less: realized gain on marketable securities, net	0	0	(1)	(1,204)
Comprehensive income (loss)	$ 15,035	$ (4,563)	$ 34,075	$ (22,963)