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Basis Of Presentation And Summary Of Significant Accounting Policies (Foreign Currency) (Narrative) (Details) - USD ($)	12 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2015
Foreign Currency Transactions [Line Items]
Foreign currency transactions gain (loss), before tax	$ 400,000	$ 2,400,000	$ (1,700,000)
Foreign currency forward contracts outstanding	23,400,000
Unrealized net losses	364,000	(986,000)	$ 2,086,000
Foreign Currency Forward Contracts [Member]
Foreign Currency Transactions [Line Items]
Unrealized net losses	600,000	0
Realized net losses	$ 500,000	$ 0

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 50
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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