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Earnings Per Common Share (Schedule Of Reconciliation Of Net Income To Net Income Available To Common Shareholders) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Aug. 31, 2022 | Aug. 31, 2021 | Aug. 31, 2020
Earnings Per Common Share [Abstract] |  |  |
Net income | $ 67,329 | $ 70,229 | $ 60,710
Less: Net income allocated to participating securities | (251) | (277) | (294)
Net income available to common shareholders | $ 67,078 | $ 69,952 | $ 60,416

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