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FAIR VALUE (Financial Assets and Liabilities Not Required to Be Measured at Fair Value) (Details) - USD ($) $ in Thousands | Nov. 30, 2017 | Aug. 31, 2017
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Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities |  | $ 832,133 | $ 832,077
2027 Notes | Level 2 | Carrying Value |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities | [1] | 300,000 | 300,000
2027 Notes | Level 2 | Fair Value |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities | [1] | 307,431 | 314,286
2023 Notes |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities |  | 330,000 | 330,000
2023 Notes | Level 2 | Carrying Value |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities | [1] | 330,000 | 330,000
2023 Notes | Level 2 | Fair Value |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities | [1] | 339,824 | 340,052
Revolving credit facility | Term Loan (Due 2022) | Level 2 | Carrying Value |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities | [2] | 150,000 | 150,000
Revolving credit facility | Term Loan (Due 2022) | Level 2 | Fair Value |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities | [2] | $ 150,000 | $ 150,000
[1] | The fair value of the notes is determined based on indicated market values.
[2] | The Term Loan contains variable interest rates and its carrying value approximates fair value.

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