Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (25,523)		$ (85,532)	$ (148,188)
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	(33,159)	$ (5,688)	(26,710)	(21,318)
Total other comprehensive income (loss)	(33,159)	(5,688)	(26,710)	(21,318)
Comprehensive income (loss)	$ (58,682)	$ (71,667)	$ (112,242)	$ (169,506)