Quarterly report pursuant to Section 13 or 15(d)

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION (Schedule of Share-based Compensation) (Details)

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STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION (Schedule of Share-based Compensation) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Share-based compensation:    
Share-based compensation $ 3,356 $ 4,287
Cost of revenue [Member]
   
Share-based compensation:    
Share-based compensation 528 571
Research and development [Member]
   
Share-based compensation:    
Share-based compensation 868 900
Selling and marketing [Member]
   
Share-based compensation:    
Share-based compensation 1,074 1,084
General and administrative [Member]
   
Share-based compensation:    
Share-based compensation $ 886 $ 1,732