Goodwill and Intangible Assets - Schedule of Change in Carrying Amount of Goodwill (Detail) $ in Thousands |
3 Months Ended |
|---|---|
|
Apr. 30, 2017
USD ($)
| |
| Goodwill [Roll Forward] | |
| Goodwill, gross | $ 62,566 |
| Accumulated impairment losses | (39,279) |
| Goodwill, net | 23,287 |
| Cumulative translation adjustment | 336 |
| Goodwill, gross | 62,902 |
| Accumulated impairment losses | (39,279) |
| Goodwill, net | $ 23,623 |