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Shareholders' Equity - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021	Jun. 04, 2019	Aug. 22, 2017
Equity, Class of Treasury Stock [Line Items]
Common shares authorized for repurchase, shares					20,000,000	20,000,000
Remaining common shares authorized for repurchase, shares	19,156,390		19,156,390
Stock repurchased and retired during period, total cost	$ 12	$ 15,010	$ (118,696)	$ 22,572
Employee Stock
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired during period shares			246,034	225,757
Stock repurchased and retired during period, total cost			$ 6,680	$ 7,684

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The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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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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