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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
Feb. 29, 2012
Aug. 31, 2011
Feb. 28, 2011
Derivatives Designated As Hedging Instruments [Member]
     
Derivatives, Fair Value [Line Items]      
Derivative Assets (Liabilities), at Fair Value, Net $ (860) $ (634) $ (1,013)
Derivatives Designated As Hedging Instruments [Member] | Other Current Assets [Member] | Foreign Currency Forward Contracts [Member]
     
Derivatives, Fair Value [Line Items]      
Derivative assets 4    
Derivatives Designated As Hedging Instruments [Member] | Other Current Liabilities [Member] | Foreign Currency Forward Contracts [Member]
     
Derivatives, Fair Value [Line Items]      
Derivative liabilities (641) (218) (388)
Derivatives Designated As Hedging Instruments [Member] | Other Current Liabilities [Member] | Interest Rate Swap [Member]
     
Derivatives, Fair Value [Line Items]      
Interest rate swap liabilities (180) (267) (354)
Derivatives Designated As Hedging Instruments [Member] | Other Noncurrent Liabilities [Member] | Interest Rate Swap [Member]
     
Derivatives, Fair Value [Line Items]      
Interest rate swap liabilities (43) (149) (271)
Derivatives Not Designated As Hedging Instruments [Member]
     
Derivatives, Fair Value [Line Items]      
Derivative Assets (Liabilities), at Fair Value, Net (34)    
Derivatives Not Designated As Hedging Instruments [Member] | Other Current Liabilities [Member] | Foreign Currency Forward Contracts [Member]
     
Derivatives, Fair Value [Line Items]      
Derivative liabilities $ (34)