CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (29,925)	$ (178,676)	$ (12,882)
Foreign currency translation adjustments related to continuing operations	3,635	(9,872)	(15,193)
Foreign currency translation realized to discontinued operations	18,523	0	0
Comprehensive loss	$ (7,767)	$ (188,548)	$ (28,075)