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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 | Aug. 31, 2019 | Aug. 31, 2018
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Money market investments | [1] | $ 66,240 | $ 541,101
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Money market investments | [1] | 66,240 | 541,101
Significant Other Observable Inputs (Level 2) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Money market investments | [1] | 0 | 0
Significant Unobservable Inputs (Level 3) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Money market investments | [1] | 0 | 0
Commodity |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | [2] | 1,269 | 1,881
Derivative liabilities | [2] | 99 | 301
Commodity | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | [2] | 1,269 | 1,881
Derivative liabilities | [2] | 99 | 301
Commodity | Significant Other Observable Inputs (Level 2) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | [2] | 0 | 0
Derivative liabilities | [2] | 0 | 0
Commodity | Significant Unobservable Inputs (Level 3) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | [2] | 0 | 0
Derivative liabilities | [2] | 0 | 0
Foreign exchange |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | [2] | 569 | 407
Derivative liabilities | [2] | 899 | 1,095
Foreign exchange | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | [2] | 0 | 0
Derivative liabilities | [2] | 0 | 0
Foreign exchange | Significant Other Observable Inputs (Level 2) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | [2] | 569 | 407
Derivative liabilities | [2] | 899 | 1,095
Foreign exchange | Significant Unobservable Inputs (Level 3) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative assets | [2] | 0 | 0
Derivative liabilities | [2] | $ 0 | $ 0
[1] | (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] | (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 the 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 12, Derivatives and Risk Management.

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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