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Interim Financial Statements - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 29, 2024	Feb. 28, 2023	Feb. 29, 2024	Feb. 28, 2023
Equity Class Of Treasury Stock [Line Items]
Stock repurchased authorized amount	$ 100,000,000		$ 100,000,000
Remaining authorized repurchase amount	$ 45,100,000		$ 45,100,000
Number of shares repurchased	0	575,000	38,000	575,000
Number of shares repurchased amount		$ 17,400,000	$ 1,300,000	$ 17,400,000
Share repurchase program expiration date			Jan. 31, 2025

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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