Annual report pursuant to Section 13 and 15(d)

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION (Details 2)

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STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
Share-based compensation expenses:      
Share-based compensation $ 15,139 $ 13,737 $ 10,421
Cost Of Sales [Member]
     
Share-based compensation expenses:      
Share-based compensation 2,389 2,203 1,768
Research and Development Expense [Member]
     
Share-based compensation expenses:      
Share-based compensation 3,665 3,250 2,486
Selling and Marketing Expense [Member]
     
Share-based compensation expenses:      
Share-based compensation 4,699 4,048 3,121
General and Administrative Expense [Member]
     
Share-based compensation expenses:      
Share-based compensation $ 4,386 $ 4,236 $ 3,046