Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (40,712)	$ (90,828)	$ 102,278
Foreign currency translation adjustments	(4,932)	(26,284)	(22,508)
Comprehensive income (loss)	$ (45,644)	$ (117,112)	$ 79,770