GOODWILL AND INTANGIBLE ASSETS - Schedule of Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Goodwill [Roll Forward]
Beginning balance	$ 1,709,369	$ 197,445
Goodwill acquired		1,504,261
Deferred revenue adjustments		(11,392)
Purchase accounting adjustments	3,792	(527)
Change in assumptions for assumed liabilities		(6,258)
Adjust deferred tax liability		25,034
Adjust tax effect on equity consideration		(3,271)
Foreign currency translation impact	3,051	(1,064)
Ending balance	1,718,162	1,709,369
Delayed Close Entities
Goodwill [Roll Forward]
Goodwill acquired		$ 5,141
Avvasi
Goodwill [Roll Forward]
Goodwill acquired	$ 1,950