Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss) including noncontrolling interests in operating subsidiaries	$ (157,478)	$ (66,662)	$ (58,842)
Other comprehensive income (loss):
Unrealized loss on short-term investments	(356)	(1,488)	26
Unrealized gain on foreign currency translation	(123)	(128)	0
Add: reclassification adjustment for losses included in net income	617	2,210	193
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(157,340)	(66,068)	(58,623)
Net (income) loss attributable to noncontrolling interests in operating subsidiaries	2,558	(633)	(2,408)
Comprehensive income	$ (159,898)	$ (65,435)	$ (56,215)