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v3.23.1

Interim Financial Statements - Additional Information (Detail) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jan. 05, 2023 | Feb. 28, 2023 | Feb. 28, 2023 | Feb. 28, 2022
Equity Class Of Treasury Stock [Line Items] |  |  |  |
Stock repurchased authorized amount |  | $ 100.0 | $ 100.0 |
Stock repurchase program remaining authorized repurchase amount |  | $ 85.9 | $ 85.9 |
Stock repurchase program number of shares repurchased |  |  |  | 0
Share repurchase program, current authorization of shares purchased |  | 575,000 | 478,000 |
Share repurchase program, current authorization of shares purchased amount |  | $ 17.4 | $ 14.1 |
Share repurchase program expiration date |  |  | Jan. 31, 2023 |
Stock repurchase program extension date | Jan. 31, 2025 |  |  |
ASU 2020-04 |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] |  | true | true |
Change in Accounting Principle, Accounting Standards Update, Adoption Date |  | Dec. 31, 2022 | Dec. 31, 2022 |

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