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FAIR VALUE (Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis) (Details) - Fair value, measurements, recurring - USD ($)
$ in Thousands
Nov. 30, 2018
Aug. 31, 2018
Money market investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market investments $ 25,183 $ 541,101
Commodity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 162 1,881
Derivative liabilities 417 301
Foreign exchange    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 266 407
Derivative liabilities 456 1,095
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money market investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market investments 25,183 541,101
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commodity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 162 1,881
Derivative liabilities 417 301
Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign exchange    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 0 0
Derivative liabilities 0 0
Significant Other Observable Inputs (Level 2) | Money market investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market investments 0 0
Significant Other Observable Inputs (Level 2) | Commodity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets [1]   0
Derivative liabilities 0 0
Significant Other Observable Inputs (Level 2) | Foreign exchange    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 266 407
Derivative liabilities 456 1,095
Significant Unobservable Inputs (Level 3) | Money market investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market investments 0 0
Significant Unobservable Inputs (Level 3) | Commodity    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 0 0
Derivative liabilities 0 0
Significant Unobservable Inputs (Level 3) | Foreign exchange    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 0 0
Derivative liabilities $ 0 $ 0
[1] Derivative assets and liabilities classified as Level 1 are commodity futures contracts valued based on quoted market prices in the London Metal Exchange or New York Mercantile Exchange. Amounts in Level 2 are based on broker quotes in the over-the-counter market. Further discussion regarding the Company's use of derivative instruments and the classification of the assets and liabilities is included in Note 10, Derivatives and Risk Management.