Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (35,182)	$ (33,076)	$ (60,009)	$ (82,209)
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	203	(37,806)		(15,630)
Total other comprehensive income (loss)	203	(37,806)	6,449	(15,630)
Comprehensive income (loss)	$ (34,979)	$ (70,882)	$ (53,560)	$ (97,839)