CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - 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 INCOME (LOSS)
Net income (loss)	$ (39,582)	$ 59,293	$ (48,645)	$ (11,538)
Other comprehensive (loss) income:
Unrealized gain (loss) on restricted investments and marketable securities, net of tax	(394)	(166)	(260)	(79)
Reclassification adjustment for realized gains on marketable securities	(1,830)		(1,830)
Other comprehensive (loss) income	(2,224)	(166)	(2,090)	(79)
Comprehensive income (loss)	$ (41,806)	$ 59,127	$ (50,735)	$ (11,617)