BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2017 - CONTACT SOLUTIONS (Details) - Customer Engagement - Contact Solutions, LLC - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Feb. 19, 2016	Jul. 31, 2016	Jul. 31, 2016
Business Acquisition [Line Items]
Cash Paid at Closing	$ 66,915
Post-closing purchase price adjustment	2,518
Deferred revenue - current and long-term	642
Intangible Asset - Undelivered Performance Obligations	2,900
Transaction and Related Costs, Including Integration Costs		$ 300	$ 600
Prepaid Expenses and Other Current Assets
Business Acquisition [Line Items]
Intangible Asset - Undelivered Performance Obligations	1,200
Other Assets
Business Acquisition [Line Items]
Intangible Asset - Undelivered Performance Obligations	$ 1,700