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DERIVATIVES AND RISK MANAGEMENT (Derivative Assets) (Details) - USD ($)
$ in Thousands
May 31, 2016
Aug. 31, 2015
Derivatives, Fair Value [Line Items]    
Derivative assets (other current assets) [1] $ 3,419 $ 5,453
Commodity | Designated    
Derivatives, Fair Value [Line Items]    
Derivative assets (other current assets) 8 19
Commodity | Not designated    
Derivatives, Fair Value [Line Items]    
Derivative assets (other current assets) 447 846
Foreign exchange | Designated    
Derivatives, Fair Value [Line Items]    
Derivative assets (other current assets) 1,719 1,500
Foreign exchange | Not designated    
Derivatives, Fair Value [Line Items]    
Derivative assets (other current assets) $ 1,245 $ 3,088
[1] Derivative assets and liabilities do not include the hedged items designated as fair value hedges.