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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. 28, 2013
Aug. 31, 2012
Feb. 29, 2012
Derivatives Designated As Hedging Instruments [Member]
     
Derivatives, Fair Value [Line Items]      
Derivative Assets (Liabilities), at Fair Value, Net, Total $ 669 $ (526) $ (860)
Derivatives Designated As Hedging Instruments [Member] | Other Current Liabilities [Member] | Foreign Currency Forward Contracts [Member]
     
Derivatives, Fair Value [Line Items]      
Derivative liabilities (234) (436) (641)
Derivatives Designated As Hedging Instruments [Member] | Other Current Liabilities [Member] | Interest Rate Swap [Member]
     
Derivatives, Fair Value [Line Items]      
Interest rate swap liabilities (18) (90) (180)
Derivatives Designated As Hedging Instruments [Member] | Other Noncurrent Liabilities [Member] | Interest Rate Swap [Member]
     
Derivatives, Fair Value [Line Items]      
Interest rate swap liabilities     (43)
Derivatives Designated As Hedging Instruments [Member] | Other Current Assets [Member] | Foreign Currency Forward Contracts [Member]
     
Derivatives, Fair Value [Line Items]      
Derivative assets 921   4
Derivatives Not Designated As Hedging Instruments [Member]
     
Derivatives, Fair Value [Line Items]      
Derivative Assets (Liabilities), at Fair Value, Net, Total (71) (25) (34)
Derivatives Not Designated As Hedging Instruments [Member] | Other Current Liabilities [Member] | Foreign Currency Forward Contracts [Member]
     
Derivatives, Fair Value [Line Items]      
Derivative liabilities (103) (37) (34)
Derivatives Not Designated As Hedging Instruments [Member] | Other Current Assets [Member] | Foreign Currency Forward Contracts [Member]
     
Derivatives, Fair Value [Line Items]      
Derivative assets $ 32 $ 12