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Net Income per Common Share - Additional Information (Detail) - $ / shares
3 Months Ended 9 Months Ended
Oct. 31, 2025
Oct. 31, 2024
Oct. 31, 2025
Oct. 31, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive common shares 0 40,000 0 40,000
Anti-dilutive common shares exercise price, maximum   $ 46.42   $ 46.42
Performance Stock Units (PSUs)        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive common shares     209,248 270,441