Stock-based Compensation - Additional Information (Detail) $ / shares in Units, $ in Millions	3 Months Ended
	Apr. 30, 2025 USD ($) $ / shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Accrued stock-based compensation expense liabilities	$ 1.3
Closing price of ordinary shares | $ / shares	$ 47.99
Stock options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost, stock options	$ 0.4
Weighted average recognition period	1 month 9 days
Restricted stock units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost, restricted stock units	$ 160.1
Weighted average recognition period	2 years 4 months 17 days
Aggregate intrinsic value of unvested restricted stock units	$ 126.7