BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - CONSOLIDATION (Details) |
3 Months Ended |
|---|---|
Apr. 30, 2016 | |
| Less than | |
| Basis of Presentation | |
| Maximum ownership interest in cost method investments (as a percent) | 20.00% |
| Joint venture, variable interest entity in which entity is primary beneficiary | |
| Basis of Presentation | |
| Equity interest in a joint venture (as a percent) | 50.00% |