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Basis Of Presentation And Summary Of Significant Accounting Policies (Foreign Currency) (Narrative) (Details) - USD ($)	12 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2017
Foreign Currency Transactions [Line Items]
Foreign currency transactions gain (loss), before tax	$ 600,000	$ 100,000	$ 400,000
Unrealized foreign currency transactions	(651,000)	302,000	$ (364,000)
Foreign Currency Forward Contracts [Member]
Foreign Currency Transactions [Line Items]
Foreign currency forward contracts outstanding	8,600,000
Realized net losses	$ 400,000	0
Foreign currency forward contracts, Maturity date	Sep. 01, 2019
Unrealized foreign currency transactions	$ 0	$ 0

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