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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 Comprehensive Income [Abstract]
Net income (loss)	$ 15,717	$ 38,101	$ 93,640	$ 31,697
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	3,256	(169)	(5,168)	(8,883)
Change in fair value on available-for-sale investments, net of tax expense of zero for the three and six months ended June 30, 2021 and 2020, respectively.	0	(163)	0	545
Other comprehensive income (loss), net of tax	3,256	(332)	(5,168)	(8,338)
Comprehensive income	$ 18,973	$ 37,769	$ 88,472	$ 23,359

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