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Financial Derivatives (Schedule Of Financial Derivatives) (Details) - USD ($) $ in Thousands	Feb. 28, 2017	Aug. 31, 2016	Feb. 29, 2016
Derivatives Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivatives	$ (619)	$ (345)	$ (639)
Derivatives Designated As Hedging Instruments [Member] \| Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets		40
Derivatives Designated As Hedging Instruments [Member] \| Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	(619)	(385)	(639)
Derivatives Not Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivatives	(249)	(177)	(173)
Derivatives Not Designated As Hedging Instruments [Member] \| Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets		33	14
Derivatives Not Designated As Hedging Instruments [Member] \| Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ (249)	$ (210)	$ (187)