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CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - 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 (loss) income	$ (299,347)	$ 3,387	$ (409,367)	$ 4,044
Other comprehensive income (loss), net of applicable taxes:
Foreign currency translation adjustment	397	1,457	(1,439)	286
Unrealized gain (loss) on short-term investments	0	(446)	0	178
Total other comprehensive (loss) income	397	1,011	(1,439)	464
Comprehensive (loss) income	$ (298,950)	$ 4,398	$ (410,806)	$ 4,508

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