STOCK-BASED COMPENSATION (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Stock-based compensation expense
Stock-based compensation expense	$ 78,118	$ 35,765	$ 33,494
Capitalized stock-based compensation expense	26,156	6,964	11,220
Stock-based compensation expense for non-employee awards	16,807	8,789	13,365
Cost of goods sold
Stock-based compensation expense
Stock-based compensation expense	30,124	10,060	5,144
Selling and marketing
Stock-based compensation expense
Stock-based compensation expense	10,136	5,562	5,042
General and administrative
Stock-based compensation expense
Stock-based compensation expense	28,991	17,824	19,963
Research and development
Stock-based compensation expense
Stock-based compensation expense	$ 8,867	$ 2,319	$ 3,345