Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 18,683	$ (87,808)	$ (161,934)	$ (120,683)
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on marketable securities, net	(43)	7	(17)	(3)
Total comprehensive income (loss)	$ 18,640	$ (87,801)	$ (161,951)	$ (120,686)