REVENUE RECOGNITION REVENUE RECOGNITION - IMPACT OF ADOPTION - ADDITIONAL INFORMATION (Details) - USD ($) $ in Thousands |
3 Months Ended | ||||
|---|---|---|---|---|---|
Feb. 01, 2018 |
Apr. 30, 2018 |
Apr. 30, 2017 |
Jan. 31, 2018 |
Jan. 31, 2017 |
|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||||
| Total stockholders' equity | $ 1,170,383 | $ 1,163,271 | $ 1,023,072 | $ 1,132,336 | $ 1,015,040 |
| Revenue | 289,207 | 260,995 | |||
| Cost of Revenue | 114,092 | $ 110,803 | |||
| Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 | |||||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||||
| Total stockholders' equity | 38,047 | $ 56,737 | |||
| Revenue | 17,200 | ||||
| Deferred Costs | 4,200 | ||||
| Cost of Revenue | 2,900 | ||||
| Capitalized Contract Cost, Net | 16,900 | ||||
| Deferred income taxes | $ 3,200 | ||||