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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, 2017 | Aug. 31, 2017
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Money market investments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Money market investments | [1] | $ 75,593 | $ 43,553
Commodity |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | [2] | 780 | 767
Derivative liabilities | [2] | 499 | 3,251
Foreign exchange |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | [2] | 3,940 | 1,367
Derivative liabilities | [2] | 1,548 | 5,259
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 | [1] | 75,593 | 43,553
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 | [2] | 780 | 767
Derivative liabilities | [2] | 499 | 3,251
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 | [2] | 0 | 0
Derivative liabilities | [2] | 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 | [1] | 0 | 0
Significant Other Observable Inputs (Level 2) | Commodity |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | [2] | 0 | 0
Derivative liabilities | [2] | 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 | [2] | 3,940 | 1,367
Derivative liabilities | [2] | 1,548 | 5,259
Significant Unobservable Inputs (Level 3) | Money market investments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Money market investments | [1] | 0 | 0
Significant Unobservable Inputs (Level 3) | Commodity |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | [2] | 0 | 0
Derivative liabilities | [2] | 0 | 0
Significant Unobservable Inputs (Level 3) | Foreign exchange |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | [2] | 0 | 0
Derivative liabilities | [2] | $ 0 | $ 0
[1] | Investment deposit accounts are short-term in nature, and the value is determined by principal plus interest. The investment portfolio mix can change each period based on the Company's assessment of investment options.
[2] | 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 8, Derivatives and Risk Management.

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