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Retirement Plan
12 Months Ended
Mar. 31, 2012
Retirement Plan [Abstract]  
Retirement Plan

NOTE 15 - RETIREMENT PLAN

In 1996, NetScout established an employee savings plan, which is intended to qualify under Section 401(k) of the Internal Revenue Code of 1986, as amended. NetScout matches 50% of the employee's contribution up to 6% of the employee's salary. NetScout contributions vest at a rate of 25% per year of service. NetScout made matching contributions of $2.1 million, $1.8 million and $1.9 million to the plan for the years ended March 31, 2012, 2011 and 2010, respectively.