DERIVATIVE FINANCIAL INSTRUMENTS DERIVATIVE FINANCIAL INSTRUMENTS - NOT DESIGNATED AT HEDGING INSTRUMENTS (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Apr. 30, 2016 |
Apr. 30, 2015 |
|
| DERIVATIVE FINANCIAL INSTRUMENTS | ||
| (Losses) gains on derivative financial instruments, net | $ (1,559) | $ 132 |
| Derivative not designated as hedging instruments | Foreign currency forward contracts | ||
| DERIVATIVE FINANCIAL INSTRUMENTS | ||
| (Losses) gains on derivative financial instruments, net | $ (1,559) | $ 132 |