STOCK-BASED COMPENSATION STOCK-BASED COMPENSATION - PERFORMANCE RESTRICTED STOCK UNITS (Details) - Performance- based RSU's - shares shares in Thousands |
3 Months Ended | |
|---|---|---|
Apr. 30, 2018 |
Apr. 30, 2017 |
|
| Stock-Based Compensation Plans | ||
| Beginning balance (in shares) | 506 | 438 |
| Granted (in shares) | 174 | 204 |
| Released (in shares) | (72) | (50) |
| Forfeited (in shares) | (83) | (79) |
| Ending balance (in shares) | 525 | 513 |