Unaudited Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (24,626)	$ (9,740)	$ (429,667)	$ (24,388)
Other comprehensive income (loss):
Currency translation adjustments	(1,230)	(2,329)	(16,021)	137
Comprehensive loss	$ (25,856)	$ (12,069)	$ (445,688)	$ (24,251)