STOCK-BASED COMPENSATION STOCK-BASED COMPENSATION - STOCK-BASED COMPENSATION - BY LINE ITEM (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Apr. 30, 2016 |
Apr. 30, 2015 |
|
| Stock-Based Compensation Plans | ||
| Stock-based compensation expense | $ 15,340 | $ 14,850 |
| Cost of revenue - product | ||
| Stock-Based Compensation Plans | ||
| Stock-based compensation expense | 113 | 135 |
| Cost of revenue - service and support | ||
| Stock-Based Compensation Plans | ||
| Stock-based compensation expense | 1,391 | 461 |
| Research and development, net | ||
| Stock-Based Compensation Plans | ||
| Stock-based compensation expense | 1,462 | 1,263 |
| Selling, general and administrative | ||
| Stock-Based Compensation Plans | ||
| Stock-based compensation expense | $ 12,374 | $ 12,991 |