Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Condensed Consolidated Statements of Comprehensive Loss [Abstract]
Net loss	$ (157,304)	$ (38,441)	$ (301,874)	$ (157,196)
Change in cumulative translation adjustment, net of tax	4,216	(2,967)	(607)	(3,810)
Comprehensive loss	$ (153,088)	$ (41,408)	$ (302,481)	$ (161,006)