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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 59,473	$ 127,262	$ 91,006	$ 180,809
Other comprehensive (loss) income:
Foreign currency translation	(6,243)	(1,394)	(20,632)	4,028
Change in unrealized gains (losses) on marketable securities, net of tax	654	47	(4,723)	4
Total other comprehensive (loss) income	(5,589)	(1,347)	(25,355)	4,032
Comprehensive income	$ 53,884	$ 125,915	$ 65,651	$ 184,841

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