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Financial Derivatives (Schedule Of Financial Derivatives) (Details) - USD ($)
$ in Thousands
Aug. 31, 2015
Aug. 31, 2014
Derivatives Designated As Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Total derivatives $ (135) $ 660
Derivatives Designated As Hedging Instruments [Member] | Other Current Assets [Member] | Foreign Currency Forward Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 217 900
Derivatives Designated As Hedging Instruments [Member] | Other Current Liabilities [Member] | Foreign Currency Forward Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Derivative liabilities (352) (240)
Derivatives Not Designated As Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Total derivatives 434 (160)
Derivatives Not Designated As Hedging Instruments [Member] | Other Current Assets [Member] | Foreign Currency Forward Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 495  
Derivatives Not Designated As Hedging Instruments [Member] | Other Current Liabilities [Member] | Foreign Currency Forward Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Derivative liabilities $ (61) $ (160)