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Share Repurchase Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Equity, Class of Treasury Stock [Line Items]
Total cost	$ 169	$ 12	$ 8,353	$ 118,696
Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Number of common shares repurchased and subsequently retired	0	0	0	4,736,405
Total cost	$ 0	$ 0	$ 0	$ 112,016
Average cost per share, including commissions	$ 0	$ 0	$ 0	$ 23.65

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Number of shares that have been repurchased and retired during the period.

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Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 50
-Paragraph 2
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Total cost of shares repurchased divided by the total number of shares repurchased.

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