SEGMENT AND GEOGRAPHIC INFORMATION (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Net revenue by product platform:
Total net revenue	$ 299,487	$ 415,773	$ 273,084	$ 226,139	$ 148,084	$ 236,325	$ 107,034	$ 334,380	$ 1,214,483	$ 825,823	$ 1,136,876
Console
Net revenue by product platform:
Total net revenue									975,994	703,188	973,954
PC and other
Net revenue by product platform:
Total net revenue									216,321	87,318	110,511
Handheld
Net revenue by product platform:
Total net revenue									$ 22,168	$ 35,317	$ 52,411