SEGMENT AND GEOGRAPHIC INFORMATION - REVENUE BY DISTRIBUTION CHANNEL (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net revenue by distribution channel:
Total net revenue	$ 420,167	$ 346,974	$ 731,719	$ 622,271
Digital online
Net revenue by distribution channel:
Total net revenue	230,759	202,426	402,837	356,411
Physical retail and other
Net revenue by distribution channel:
Total net revenue	$ 189,408	$ 144,548	$ 328,882	$ 265,860