STOCKHOLDERS' EQUITY - TREASURY STOCK (Details) - USD ($) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
Apr. 30, 2016 |
Apr. 30, 2015 |
Jan. 31, 2016 |
|
| Activity in Accumulated Other Comprehensive Loss | |||
| Purchases of treasury stock (in shares) | 500,000 | 0 | |
| Purchases of treasury stock | $ 17,162 | $ 0 | |
| Treasury stock, (in shares) | 848,000 | 348,000 | |
| Treasury stock, cost | $ 27,413 | $ 10,251 | |