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SUBSEQUENT EVENTS (Details) - USD ($) | Jun. 23, 2017 | Jun. 26, 2017 | May 31, 2017 | Aug. 31, 2016 | Aug. 31, 2014 | Aug. 31, 2008
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Subsequent Event [Line Items] |  |  |  |  |  |
Financial liabilities |  |  | $ 1,066,762,000 | $ 1,075,641,000 |  |
2018 Notes |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Financial liabilities |  |  | $ 405,406,000 | $ 408,874,000 |  |
Debt instrument, interest rate, stated percentage |  |  |  |  |  | 7.35%
Amount of debt to be issued |  |  |  |  |  | $ 500,000,000
2018 Notes | Subsequent Event |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Financial liabilities |  | $ 399,800,000 |  |  |  |
Debt instrument, interest rate, stated percentage |  | 7.35% |  |  |  |
Forecast | 2018 Notes |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Debt to be repurchased |  | $ 300,000,000.0 |  |  |  |
Forecast | 2027 Notes |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Amount of debt to be issued |  | $ 300,000,000.0 |  |  |  |
Revolving credit facility |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Maximum principal amount |  |  |  |  | $ 500,000,000 |
Revolving credit facility | Term Loan | Subsequent Event |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Maximum principal amount | $ 150,000,000.0 |  |  |  |  |
Period amounts can be drawn for term loans | 270 days |  |  |  |  |

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