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Treasury Stock - Additional Information (Details) - USD ($)			6 Months Ended
	Mar. 25, 2021	Aug. 29, 2017	Jul. 31, 2021	Jul. 31, 2020
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, number of shares authorized	$ 25,000,000.0
Stock repurchase program, total cost of shares repurchased			$ 9,975,000
Stock repurchase program expiration date	Sep. 30, 2022
Existing Share Repurchase Program
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, number of shares authorized		$ 50,000,000.0
Stock repurchase program, total cost of shares repurchased			$ 10,000,000.0
Stock repurchase program expiration date		Aug. 29, 2020
Stock repurchase program, number of shares repurchased			334,000	0
Stock repurchase program, average per share price of shares repurchased			$ 29.87
Stock repurchase program, remaining authorized repurchase amount			$ 15,000,000.0
Surrender of Shares by Employee
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, number of shares repurchased			54,720	47,302

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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