Condensed Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 200,691	$ (1,956)
Other comprehensive loss:
Foreign currency translation loss		(3)
Net unrealized loss on marketable securities, net of tax	(654)	(336)
Comprehensive income (loss)	$ 200,037	$ (2,295)