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Reconciliation of Weighted Average Common Shares Outstanding Used for Computation of Basic and Diluted Net Income per Common Share (Detail) - shares
3 Months Ended
Apr. 30, 2023
Apr. 30, 2022
Earnings Per Share [Abstract]    
Basic weighted-average common shares outstanding 92,474,688 95,479,927
Effect of dilutive options, performance stock units and restricted stock units 1,346,604 867,284
Diluted weighted-average shares outstanding 93,821,292 96,347,211