CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME/(LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (29,436)	$ (45,103)
Unrealized gains on investments, net	177	126
Tax expense on unrealized gain on investments, net	(69)	(48)
Other comprehensive income, net of tax	108	78
Comprehensive loss	$ (29,328)	$ (45,025)