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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2023	Apr. 30, 2022
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 52,817	$ 31,533
Other comprehensive (loss) income:
Foreign currency translation	3,177	(14,389)
Change in unrealized gains (losses) on marketable securities, net of tax	2,120	(5,377)
Total other comprehensive (loss) income	5,297	(19,766)
Comprehensive income	$ 58,114	$ 11,767

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