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Net Income Per Share (Tables)
3 Months Ended
Jun. 30, 2013
Earnings Per Share [Abstract]  
Schedule of reconciliation of the numerators and denominators of the basic and diluted net income per share computations
 
                 
   
Three Months Ended June 30,
 
   
2013
   
2012
 
             
Net income (numerator):
           
             
  Net income
  $ 4,755     $ 3,952  
                 
Shares (denominator):
               
                 
  Weighted average number of common shares
               
    outstanding used in basic computation
    19,848       20,119  
  Common shares issuable upon vesting of
               
    restricted stock
    146       116  
  Common shares issuable upon conversion
               
    of preferred shares
    10       10  
  Shares used in diluted computation
    20,004       20,245  
                 
Net income per common share:
               
                 
  Basic
  $ 0.24     $ 0.20  
  Diluted
  $ 0.24     $ 0.20