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Share-Based Awards | 9 Months Ended
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Sep. 24, 2021
Share-based Payment Arrangement, Additional Disclosure [Abstract] |
Share-Based Awards | Share-Based Awards Options on common shares granted and outstanding, as well as the weighted average exercise price, are shown below (in thousands, except exercise prices):
| Option Shares |  | Weighted Average Exercise Price |  | Options Exercisable |  | Weighted Average Exercise Price
Outstanding, December 25, 2020 | 10,208 |  |  | $ | 35.02 |  |  | 6,553 |  |  | $ | 28.02 |
Granted | 841 |  |  | 72.21 |  |  |  |  |
Exercised | (958) |  |  | 23.28 |  |  |  |  |
Canceled | (131) |  |  | 54.75 |  |  |  |  |
Outstanding, September 24, 2021 | 9,960 |  |  | $ | 39.03 |  |  | 7,627 |  |  | $ | 33.49 |
The Company recognized year-to-date share-based compensation of $19.9 million in 2021 and $21.4 million in 2020. As of September 24, 2021, there was $12.6 million of unrecognized compensation cost related to unvested options, expected to be recognized over a weighted average period of 2.7 years. The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions and results:
| Nine Months Ended
| September 24, 2021 |  | September 25, 2020
Expected life in years | 7.5 |  | 7.5
Interest rate | 1.2 | % |  | 1.5 | %
Volatility | 25.3 | % |  | 22.0 | %
Dividend yield | 1.0 | % |  | 1.3 | %
Weighted average fair value per share | $ | 18.91 |  |  | $ | 12.18 |
Under the Company’s Employee Stock Purchase Plan, the Company issued 416,000 shares in 2021 and 400,000 shares in 2020. The fair value of the employees’ purchase rights under this Plan was estimated on the date of grant. The benefit of the 15 percent discount from the lesser of the fair market value per common share on the first day and the last day of the plan year was added to the fair value of the employees’ purchase rights determined using the Black-Scholes option-pricing model with the following assumptions and results:
| Nine Months Ended
| September 24, 2021 |  | September 25, 2020
Expected life in years | 1.0 |  | 1.0
Interest rate | 0.1 | % |  | 1.5 | %
Volatility | 40.1 | % |  | 21.9 | %
Dividend yield | 1.1 | % |  | 1.4 | %
Weighted average fair value per share | $ | 21.50 |  |  | $ | 11.55 |

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- Definition The entire disclosure for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 + Details
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