3. Stock-Based Compensation
Stock Options
During the twelve weeks ended July 10, 2011, the Company issued 110,000 options with a weighted average grant date fair value of $15.28 per share and a weighted average exercise price of $34.60 per share. Compensation expense for these options is recognized over the remaining vesting period less expected forfeitures. The weighted average vesting period for all options outstanding is approximately 1.4 years. The Company issued 11,000 options with a weighted average grant date fair value of $8.80 per share and a weighted average exercise price of $20.69 per share during the twelve weeks ended July 11, 2010.
During the twenty-eight weeks ended July 10, 2011, the Company issued 133,000 options with a weighted average grant date fair value of $14.40 per share and a weighted average exercise price of $32.75 per share. Compensation expense for these options is recognized over the remaining weighted average vesting period for all options outstanding which is approximately 1.4 years. The Company issued 253,000 options with a weighted average grant date fair value of $9.17 per share and a weighted average exercise price of $21.71 per share during the twenty-eight weeks ended July 11, 2010.
The fair value of options at the grant date was estimated utilizing the Black-Scholes multiple option-pricing model with the following weighted average assumptions for the periods presented:
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Twelve Weeks Ended
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Twenty-eight Weeks
Ended
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July 10,
2011
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|
July 11,
2010
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|
July 10,
2011
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|
July 11,
2010
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Risk-free interest rate
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1.2
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%
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1.3
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%
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1.2
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%
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1.7
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%
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Expected years until exercise
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|
3.6
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|
3.6
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|
3.6
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|
3.5
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|
Expected stock volatility
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|
60.0
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%
|
58.0
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%
|
60.0
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%
|
57.2
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%
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Dividend yield
|
|
0.0
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%
|
0.0
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%
|
0.0
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%
|
0.0
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%
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Weighted-average Black-Scholes fair value per share at date of grant
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|
$
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15.28
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$
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8.80
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|
$
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14.40
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$
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9.17
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Restricted Stock
The Company did not issue any shares of non-vested common stock during the twelve and twenty-eight weeks ended July 10, 2011. Compensation expense for the aggregate 16,000 shares of non-vested common stock outstanding at July 10, 2011 is recognized over the remaining vesting period, less expected forfeitures. The weighted average vesting period is approximately 1.0 years. These awards vest in installments over four years on the anniversary dates. The Company did not issue shares of non-vested common stock during the twelve weeks and twenty-eight weeks ended July 11, 2010.
Time Based RSUs
During the twelve weeks ended July 10, 2011, the Company granted 40,000 restricted stock units (RSUs) to certain non-employee directors and employees under the Second Amended and Restated 2007 Performance Incentive Plan (the Stock Plan) with a weighted average grant date fair value of $34.61. The fair value of each RSU granted is equal to the market price of the Companys stock at date of grant. Compensation expense for the RSUs is recognized over the remaining vesting period, less expected forfeitures.
The weighted average vesting period for all RSUs outstanding is approximately 1.77 years. The RSUs granted to employees vest in equal installments over three to four years on the anniversary date and upon vesting, the Company issues one share of the Companys common stock for each RSU. The RSUs granted to non-employee directors are scheduled to vest in three equal installments on the first, second, and third anniversaries of the date of grant, and the shares underlying the units will be distributed upon vesting. The Company granted 28,000 RSUs with a weighted average grant date fair value of $20.40 during the twelve weeks ended July 11, 2010.
During the twenty-eight weeks ended July 10, 2011, the Company granted 43,000 RSUs under the Stock Plan with a weighted average grant date fair value of $33.77. The RSUs vest in equal installments over three to four years on the anniversary date and upon vesting, one share of the Companys common stock is issued for each RSU. The fair value of each RSU granted is equal to the market price of the Companys stock at date of grant. Compensation expense for the RSUs is recognized over the remaining weighted average vesting period, less expected forfeitures, for all RSUs outstanding which is approximately 1.77 years. The Company granted 90,000 RSUs or 131,000 RSUs inclusive of the performance based RSUs granted during second quarter 2010, under the Stock Plan with a weighted average grant date fair value of $25.68 during the twenty-eight weeks ended July 11, 2010.
Performance Based RSUs
During the twenty-eight weeks ended July 10, 2011, the Company granted no performance based restricted stock units (PSUs). The Company issued 41,000 PSUs during the twenty-eight weeks ended July 11, 2010 with a grant date fair value of $35.90. These PSUs are subject to company performance metrics based on Total Shareholder Return and measure the overall stock price performance of the Company to the stock price performance of a selected industry peer group, thus resulting in a market condition. The actual number of PSUs subject to the awards will be determined at the end of the performance period based on these performance metrics. The fair value of the PSUs is calculated using the Monte Carlo valuation method. This method utilizes multiple input variables to determine the probability of the Company achieving the market condition and the fair value of the awards. These awards have a three-year performance period and are classified as equity as each unit is convertible into one share of the Companys common stock upon vesting. Compensation expense is recognized on a straight-line basis over the requisite service period (or to an employees eligible retirement date, if earlier).
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