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Financial Derivatives (Schedule Of Financial Derivatives) (Details) - USD ($)
$ in Thousands
Aug. 31, 2016
Aug. 31, 2015
Derivatives Designated As Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Total derivatives $ (345) $ (135)
Derivatives Designated As Hedging Instruments [Member] | Other Current Assets [Member] | Foreign Currency Forward Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 40 217
Derivatives Designated As Hedging Instruments [Member] | Other Current Liabilities [Member] | Foreign Currency Forward Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Derivative liabilities (385) (352)
Derivatives Not Designated As Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Total derivatives (177) 434
Derivatives Not Designated As Hedging Instruments [Member] | Other Current Assets [Member] | Foreign Currency Forward Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 33 495
Derivatives Not Designated As Hedging Instruments [Member] | Other Current Liabilities [Member] | Foreign Currency Forward Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Derivative liabilities $ (210) $ (61)