v3.26.1
Shareholders' Equity - Share Repurchase Activity (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Equity, Class of Treasury Stock [Line Items]    
Total cost $ 324,156 $ 173,369
Share Repurchase Program    
Equity, Class of Treasury Stock [Line Items]    
Number of common shares repurchased and subsequently retired 4,639,208 3,274,260
Total cost [1] $ 299,996 $ 151,935
Average cost per share, including commissions $ 64.67 $ 46.4
[1] Under the Inflation Reduction Act, the Company's share repurchases, net of issuances, are subject to a 1% excise tax. The total cost of share repurchases during the three months ended April 30, 2026 and April 30, 2025, excludes excise tax incurred of $2,647 and $1,193, respectively.