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Net Income Per Share (Tables)
 9 Months Ended
Dec. 31, 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
December 31,
    
Nine Months Ended
December 31,
  
   
2013
    
2012
    
2013
    
2012
  
Net income (numerator):
                                
Net income
  
$
4,541
    
$
4,577
    
$
13,446
    
$
12,563
  
Shares (denominator):
                                
Weighted average number of common shares
outstanding used in basic computation
    
19,925
      
19,808
      
19,892
      
19,963
  
Common shares issuable upon the vesting of
restricted stock
    
144
      
105
      
140
      
104
  
Common shares issuable upon conversion
of preferred shares
    
10
      
10
      
10
      
10
  
Shares used in diluted computation
    
20,079
      
19,923
      
20,042
      
20,077
  
Net income per common share:
                                
Basic
  
$
0.23
    
$
0.23
    
$
0.68
    
$
0.63
  
Diluted
  
$
0.23
    
$
0.23
    
$
0.67
    
$
0.63