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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 31,533	$ 53,547
Other comprehensive (loss) income:
Foreign currency translation	(14,389)	5,422
Change in unrealized gains (losses) on marketable securities, net of tax	(5,377)	(43)
Total other comprehensive (loss) income	(19,766)	5,379
Comprehensive income	$ 11,767	$ 58,926

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