SEGMENT AND GEOGRAPHIC INFORMATION - REVENUE BY PRODUCT PLATFORM (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Net revenue by product platform:
Total net revenue	$ 571,555	$ 476,474	$ 420,167	$ 311,552	$ 377,206	$ 414,221	$ 346,974	$ 275,297	$ 1,779,748	$ 1,413,698	$ 1,082,938
Console
Net revenue by product platform:
Total net revenue									1,440,724	1,167,623	881,516
PC and other
Net revenue by product platform:
Total net revenue									$ 339,024	$ 246,075	$ 201,422