Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (7,821)	$ (15,971)	$ (29,786)	$ (126,000)
Foreign currency translation adjustment	(326)	(577)	(644)	(1,496)
Comprehensive income (loss)	$ (8,147)	$ (16,548)	$ (30,430)	$ (127,496)