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DERIVATIVES AND RISK MANAGEMENT (Derivatives Not Designated as Hedging Instruments) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
May 31, 2018
May 31, 2017
May 31, 2018
May 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) before income taxes for derivatives not designated as hedges $ 2,016 $ 571 $ 3,190 $ (866)
Commodity | Cost of goods sold        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) before income taxes for derivatives not designated as hedges 1,498 1,654 2,071 (3,121)
Foreign exchange | Cost of goods sold        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) before income taxes for derivatives not designated as hedges 0 (5) (50) (38)
Foreign exchange | Net sales        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) before income taxes for derivatives not designated as hedges 0 (2) 0 (2)
Foreign exchange | SG&A expenses        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) before income taxes for derivatives not designated as hedges $ 518 $ (1,076) $ 1,169 $ 2,295