CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income loss	$ 9,294	$ (36,873)	$ (9,063)	$ (70,830)
Other comprehensive (loss) income:
Unrealized gain (loss) on restricted investments and marketable securities, net of tax	(309)	40	134	87
Other comprehensive (loss) income	(309)	40	134	87
Comprehensive income (loss)	$ 8,985	$ (36,833)	$ (8,929)	$ (70,743)