SEGMENT INFORMATION SEGMENT INFORMATION - SEGMENT REVENUE AND SEGMENT CONTRIBUTION (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 287,295	$ 315,259
Operating Income	6,174	14,468
Customer Engagement
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	185,865	207,095
Cyber Intelligence
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	101,430	108,164
Segment Amount | Customer Engagement
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	189,127	215,867
Operating Income	65,797	78,818
Segment Amount | Cyber Intelligence
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	102,522	108,291
Operating Income	24,964	27,290
Reconciling Items | Customer Engagement
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment Revenue Adjustments	(3,262)	(8,772)
Reconciling Items | Cyber Intelligence
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment Revenue Adjustments	$ (1,092)	$ (127)