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CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (61,373)	$ (90,433)	$ 10,617
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on available-for-sale securities	46	249	(17)
Foreign currency translation adjustments	10,234	(155)	(6,600)
Total other comprehensive income (loss), net of tax	10,280	94	(6,617)
Comprehensive (loss) income	$ (51,093)	$ (90,339)	$ 4,000

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