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Net Income per Common Share - Reconciliation of Weighted Average Common Shares Outstanding Used for Computation of Basic and Diluted Net Income per Common Share (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jan. 31, 2025
Jan. 31, 2024
Jan. 31, 2023
Earnings Per Share [Abstract]      
Net Income (Loss) $ 402,462 $ 287,674 $ 159,699
Basic weighted-average common shares outstanding 92,684,127 92,697,751 93,199,874
Effect of dilutive options, stock appreciation rights, restricted stock units and performance stock units 1,763,919 1,630,034 944,188
Diluted weighted-average shares outstanding 94,448,046 94,327,785 94,144,062
Basic $ 4.34 $ 3.1 $ 1.71
Diluted $ 4.26 $ 3.05 $ 1.7