Condensed Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (39,365)	$ (14,746)
Other comprehensive (loss) income:
Unrealized (loss) gain on marketable securities, net of tax	(6)	(12)
Unrealized loss on cash flow hedges, net of tax	(1,212)	0
Less: reclassification adjustment for net (gains) losses included in net income, net of tax	635	0
Other comprehensive loss	(583)	(12)
Comprehensive (loss) income	$ (39,948)	$ (14,758)