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Net Income per Common Share - Additional Information (Detail) - $ / shares
3 Months Ended
Apr. 30, 2023
Apr. 30, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive common shares 120,000 200,000
Anti-dilutive common shares exercise price, minimum $ 28.47 $ 28.47
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 272,554 197,501