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
Statement of Comprehensive Income [Abstract]
Net loss	$ (64,011)	$ (61,809)	$ (205,451)	$ (266,659)
Other comprehensive (loss) gain:
Foreign currency translation adjustment (loss) gain, net of tax impact of $1,203, $207, $649, and $237, respectively	(289)	584	1,791	661
Unrealized (loss) gain on available-for-sale securities, net of tax impact of $(91), $(23), $(25), and $197, respectively	(344)	(11)	(96)	551
Other comprehensive (loss) income	(633)	573	1,695	1,212
Comprehensive loss	$ (64,644)	$ (61,236)	$ (203,756)	$ (265,447)