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Income Taxes (Schedule Of Unrecognized Tax Benefits Roll Forward) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Aug. 31, 2019 | Aug. 31, 2018
Income Taxes [Abstract] |  |
Unrecognized tax benefits - Beginning of fiscal year | $ 1,038 | $ 981
Net increases (decreases) - prior period tax positions | 8,301 | 62
Net increases - current period tax positions | 210 | 263
Expirations of statute of limitations for assessment | (165) | (197)
Settlements |  | (71)
Unrecognized tax benefits - End of fiscal year | $ 9,384 | $ 1,038

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