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EMPLOYEE STOCK OPTION PLANS (Tables) | 6 Months Ended
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Sep. 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 September 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 |  |  | (14,000 | ) |  |  | 95.35 |
Balance at September 30, 2012 |  |  | 50,950 |  |  | $ | 88.28 |
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 |  |  | (10,395 | ) |  |  | 108.23 |
Balance at September 30, 2012 |  |  | 68,515 |  |  | $ | 129.61 |
Combined Balance at September 30, 2012 |  |  | 119,465 |  |  | $ | 111.98 |
September 30, 2012 | Weighted Average Aggregate Intrinsic Remaining Contractual Term |  | Value |
Outstanding | 1.7 years |  | $ | 3,702,185 |
Exercisable | 1.1 years |  | $ | 2,303,485 |
Restricted stock available for issuance |
Restricted stock available for issuance as of March 31, 2012 |  |  | 37,350 |
Less restricted stock forfeited during the year |  |  |  |
|  |  | 3,000 |
Restricted stock available for issuance as of September 30, 2012 |  |  | 40,350 |
Restricted stock awards activity | The following table represents a summary of the activity for our restricted stock awards for the fiscal year ended September 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 |  |  | 3,000 |  |  | $ | 83.60 |  |  |  | − |
Unvested at September 30, 2012 |  |  | 6,650 |  |  | $ | 83.60 |  |  |  | 4.3 |
Phantom stock awards activity | The following table represents a summary of the activity for our phantom stock plan for the fiscal year ended September 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 |  |  | 7,500 |  |  | $ | 146.95 |  |  |  | − |
Unvested at September 30, 2012 |  |  | 18,500 |  |  | $ | 146.95 |  |  |  | 4.3 |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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