ACQUISITIONS - ASSET AND LIABILITIES ASSUMED (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 399,530	$ 359,115	$ 217,080
Social Point
Business Acquisition [Line Items]
Tangible net assets (liabilities assumed)	$ (20,625)
Goodwill	147,811
Total	238,736
Developed game technology | Social Point
Business Acquisition [Line Items]
Intangible Assets	$ 53,950
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	4 years
In Process Research and Development | Social Point
Business Acquisition [Line Items]
Intangible Assets	$ 14,700	$ 5,226	$ 14,827
Analytics technology | Social Point
Business Acquisition [Line Items]
Intangible Assets	$ 29,700
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
User base | Social Point
Business Acquisition [Line Items]
Intangible Assets	$ 9,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	1 year
Branding and trade names | Social Point
Business Acquisition [Line Items]
Intangible Assets	$ 4,200
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	9 years