DEBT (Details) - USD ($) |
1 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Jan. 31, 2017 |
Jan. 31, 2016 |
Apr. 30, 2016 |
|
| Debt Instrument [Line Items] | ||||
| Gain (loss) on extinguishment of debt | $ (3,300,000) | $ (3,320,000) | $ 0 | |
| Write off of unamortized debt issuance costs | 1,700,000 | |||
| Loss related to guaranteed minimum return | $ 1,600,000 | |||
| Senior Notes | Senior Notes Due April 15, 2019 | ||||
| Debt Instrument [Line Items] | ||||
| Debt instrument face amount | $ 75,000,000.0 | |||