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Share Repurchase Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Apr. 30, 2023 | Apr. 30, 2022
Equity, Class of Treasury Stock [Line Items] |  |
Total cost | $ 7,850 | $ 68,688
Share Repurchase Program |  |
Equity, Class of Treasury Stock [Line Items] |  |
Number of common shares repurchased and subsequently retired | 0 | 2,422,058
Total cost | $ 0 | $ 62,052
Average cost per share, including commissions | $ 0 | $ 25.62

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