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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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