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EMPLOYEE STOCK OPTION PLANS (Tables)
3 Months Ended
Jun. 30, 2012
EMPLOYEE STOCK OPTION PLANS [Abstract]  
Summary of assumptions used in the valuation of option grants
The following table summarizes the 2009 Plan and the 1999 Plan price per option at grant date using the Black-Scholes pricing model:

      
Black-Scholes Pricing Model
Assumptions
    
Date of Issuance
 
Weighted Average
Fair
Value
  
Expected Dividend
Yield
  
Risk-
Free
Interest
Rate
  
Expected Volatility
  
Expected Life
(in years)
 
2009 Plan
               
July 18, 2011
 $33.07   0.83%  1.45%  40.0%  5 
July 19, 2010
 $28.58   0.91%  1.73%  37.5%  5 
March 22, 2010
 $32.56   0.84%  2.43%  37.8%  5 
October 19, 2009
 $25.36   1.04%  2.36%  37.6%  5 
                     
1999 Plan
                    
July 30, 2008
 $29.93   0.62%  3.36%  20.2%  5 
July 21, 2008
 $27.35   0.67%  3.41%  20.2%  5 
July 16, 2007
 $41.78   0.39%  4.95%  19.9%  5 
July 17, 2006
 $33.05   0.61%  5.04%  21.2%  7 
May 15, 2006
 $31.28   0.64%  5.08%  21.1%  7 
Summary of option activity
The following table summarizes activity in the 2009 Plan and the 1999 Plan as of June 30, 2012:

   
Number of Shares
  
Weighted Average Exercise
Price
 
2009 Plan
      
Balance at March 31, 2011
  73,750  $84.24 
Granted
  10,000   96.92 
Exercised
  -   - 
Canceled
  -   - 
Balance at March 31, 2012
  83,750  $85.75 
Granted
  -   - 
Exercised
  (18,800)  78.87 
Canceled
  (4,000)  88.20 
Balance at June 30, 2012
  60,950  $87.71 
          
1999 Plan
        
Balance at March 31, 2011
  96,500  $114.78 
Granted
  -   - 
Exercised
  (1,500)  65.70 
Canceled
  -   - 
Balance at March 31, 2012
  95,000  $113.63 
Granted
  -   - 
Exercised
  16,090   95.36 
Canceled
  -   - 
Balance at June 30, 2012
  78,910  $126.79 
Combined Balance at June 30, 2012
  139,860  $107.55 

 
June 30, 2012
Weighted Average Aggregate
Intrinsic Remaining Contractual Term
 
Value
 
Outstanding
2.0 years
 $4,306,842 
Exercisable
1.2  years
 $1,833,046 
Restricted stock available for issuance
Restricted stock available for issuance as of March 31, 2012
  37,350 
Less restricted stock forfeited during the quarter ended June 30, 2012:
  1,000 
Restricted stock available for issuance as of June 30, 2012
  36,350 
Restricted stock awards activity
The following table represents a summary of the activity for our restricted stock awards for the fiscal year ended June 30, 2012:

Restricted Stock Awards
 
Number of Shares
  
Weighted Average Fair Value Per Share
  
Weighted Average Remaining Vesting Term (in Years)
 
Unvested at March 31, 2012
  9,650  $83.60   4.8 
Granted
         
Vested
         
Forfeited or expired
  1,000  $83.60    
Unvested at June 30, 2012
  8,650  $83.60   4.5 
Phantom stock awards activity
The following table represents a summary of the activity for our phantom stock plan for the fiscal year ended June 30, 2012:

Phantom Stock Awards
 
Number of Shares
  
Exercise Price Per Share
  
Weighted Average Remaining Vesting Term (in Years)
 
Unvested at March 31, 2012
  26,000  $146.95   4.8 
Granted
         
Vested
         
Forfeited or expired
  2,500  $146.95    
Unvested at June 30, 2012
  23,500  $146.95   4.5