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Shareholders' Equity Share - Repurchase Activity (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jan. 31, 2025
Jan. 31, 2024
Jan. 31, 2023
Equity, Class of Treasury Stock [Line Items]      
Total cost $ 67,895 $ 8,407 $ 118,776
Share repurchase program      
Equity, Class of Treasury Stock [Line Items]      
Number of common shares repurchased and subsequently retired 1,200,000 0  
Total cost [1] $ 52,262 $ 0  
Average cost per share, including commissions $ 43.55 $ 0  
[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, 2025, excludes excise tax incurred of $231.