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FAIR VALUE MEASUREMENTS (Tables)
9 Months Ended
Dec. 31, 2011
FAIR VALUE MEASUREMENTS  
Segregation of all assets measured at fair value on a recurring basis

 
  December 31,
2011
  Quoted prices
in active markets
for identical
assets (level 1)
  Significant other
observable inputs
(level 2)
  Significant
unobservable
inputs
(level 3)
 

Money market funds

  $ 143,498   $ 143,498   $   $  

Bank-time deposits

  $ 120,286   $ 120,286   $   $  

Treasury bills

  $ 66,123   $ 66,123   $   $