v3.26.1
Shareholders' Equity Share - Repurchase Activity (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 2 Months Ended 12 Months Ended
Mar. 31, 2026
Jan. 31, 2026
Jan. 31, 2025
Jan. 31, 2024
Equity, Class of Treasury Stock [Line Items]        
Total cost   $ 177,030 $ 67,895 $ 8,407
Share repurchase program Member        
Equity, Class of Treasury Stock [Line Items]        
Number of common shares repurchased and subsequently retired   3,307,781 1,200,000  
Total cost [1]   $ 153,946 $ 52,262  
Average cost per share, including commissions $ 64.67 $ 46.54 $ 43.55  
[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 year ended January 31, 2026, excludes excise tax incurred of $1,130.