CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net loss	$ (253,116)	$ (80,127)	$ (109,544)
Other comprehensive income (loss):
Foreign currency translation adjustment	979	3,376	(5,880)
Other comprehensive income (loss)	34,326	3,376	(14,733)
Comprehensive loss	(218,790)	(76,751)	(124,277)
Russia
Other comprehensive income (loss):
Reclassification of cumulative translation loss (gain) to Net Loss upon sale or substantial liquidation	33,347	0	0
China
Other comprehensive income (loss):
Reclassification of cumulative translation loss (gain) to Net Loss upon sale or substantial liquidation	$ 0	$ 0	$ (8,853)