REVENUE RECOGNITION REVENUE RECOGNITION - DISAGGREGATION OF REVENUE (Details) - USD ($)
$ in Thousands |
3 Months Ended |
Apr. 30, 2018 |
Apr. 30, 2017 |
| Disaggregation of Revenue [Line Items] |
|
|
| Revenue |
$ 289,207
|
$ 260,995
|
| Recurring revenue |
|
|
| Disaggregation of Revenue [Line Items] |
|
|
| Revenue |
141,816
|
|
| Nonrecurring revenue |
|
|
| Disaggregation of Revenue [Line Items] |
|
|
| Revenue |
147,391
|
|
| Product revenue |
|
|
| Disaggregation of Revenue [Line Items] |
|
|
| Revenue |
105,864
|
|
| Service revenue |
|
|
| Disaggregation of Revenue [Line Items] |
|
|
| Revenue |
183,343
|
|
| Customer Engagement |
|
|
| Disaggregation of Revenue [Line Items] |
|
|
| Revenue |
186,456
|
169,985
|
| Customer Engagement | Recurring revenue |
|
|
| Disaggregation of Revenue [Line Items] |
|
|
| Revenue |
105,666
|
|
| Customer Engagement | Nonrecurring revenue |
|
|
| Disaggregation of Revenue [Line Items] |
|
|
| Revenue |
80,790
|
|
| Customer Engagement | Product revenue |
|
|
| Disaggregation of Revenue [Line Items] |
|
|
| Revenue |
48,364
|
|
| Customer Engagement | Service revenue |
|
|
| Disaggregation of Revenue [Line Items] |
|
|
| Revenue |
138,092
|
|
| Cyber Intelligence |
|
|
| Disaggregation of Revenue [Line Items] |
|
|
| Revenue |
102,751
|
$ 91,010
|
| Cyber Intelligence | Recurring revenue |
|
|
| Disaggregation of Revenue [Line Items] |
|
|
| Revenue |
36,150
|
|
| Cyber Intelligence | Nonrecurring revenue |
|
|
| Disaggregation of Revenue [Line Items] |
|
|
| Revenue |
66,601
|
|
| Cyber Intelligence | Product revenue |
|
|
| Disaggregation of Revenue [Line Items] |
|
|
| Revenue |
57,500
|
|
| Cyber Intelligence | Service revenue |
|
|
| Disaggregation of Revenue [Line Items] |
|
|
| Revenue |
$ 45,251
|
|