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Shareholders' Equity - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	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
Stock repurchased and retired during period, total cost	$ 7,850	$ 68,688
Employee Stock
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired during period shares	293,262	244,048
Stock repurchased and retired during period, total cost	$ 7,850	$ 6,636

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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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