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Financial Derivatives (Schedule Of Derivatives Instruments Statements Of Financial Performance And Financial Position, Location) (Details) (USD $)
In Thousands, unless otherwise specified
Nov. 30, 2012
Aug. 31, 2012
Nov. 30, 2011
Derivatives Designated As Hedging Instruments [Member]
     
Derivatives, Fair Value [Line Items]      
Derivative Assets (Liabilities), at Fair Value, Net, Total $ (404) $ (526) $ (29)
Derivatives Designated As Hedging Instruments [Member] | Other Current Liabilities [Member] | Foreign Currency Forward Contracts [Member]
     
Derivatives, Fair Value [Line Items]      
Derivative liabilities (359) (436)  
Derivatives Designated As Hedging Instruments [Member] | Other Current Liabilities [Member] | Interest Rate Swap [Member]
     
Derivatives, Fair Value [Line Items]      
Interest rate swap liabilities (45) (90) (225)
Derivatives Designated As Hedging Instruments [Member] | Other Noncurrent Liabilities [Member] | Interest Rate Swap [Member]
     
Derivatives, Fair Value [Line Items]      
Interest rate swap liabilities     (86)
Derivatives Designated As Hedging Instruments [Member] | Other Current Assets [Member] | Foreign Currency Forward Contracts [Member]
     
Derivatives, Fair Value [Line Items]      
Derivative assets     282
Derivatives Not Designated As Hedging Instruments [Member]
     
Derivatives, Fair Value [Line Items]      
Derivative Assets (Liabilities), at Fair Value, Net, Total 128 (25)  
Derivatives Not Designated As Hedging Instruments [Member] | Other Current Assets [Member] | Foreign Currency Forward Contracts [Member]
     
Derivatives, Fair Value [Line Items]      
Derivative assets 128 12  
Derivative liabilities   $ (37)