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Basis Of Presentation And Summary Of Significant Accounting Policies (Foreign Currency) (Narrative) (Details) - USD ($) | 12 Months Ended
--- | ---
Aug. 31, 2020 | Aug. 31, 2019 | Aug. 31, 2018
Foreign Currency Transactions [Line Items] |  |  |
Foreign currency transactions gain (loss), before tax | $ 400,000 | $ 600,000 | $ 100,000
Unrealized foreign currency transactions | (265,000) | (651,000) | $ 302,000
Foreign Currency Forward Contracts [Member] |  |  |
Foreign Currency Transactions [Line Items] |  |  |
Foreign currency forward contracts outstanding | 12,800,000 |  |
Realized net losses | $ 0 | 0 |
Foreign currency forward contracts, Maturity date | Sep. 01, 2020 |  |
Unrealized foreign currency transactions | $ 0 | $ 0 |

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