Share-Based Awards

9 Months Ended

Sep. 29, 2017

Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]

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 30, 2016	5,535		$	55.26	3,672	$	45.40
Granted	575		92.13
Exercised	(1,138	)	40.97
Canceled	(38	)	80.31
Outstanding, September 29, 2017	4,934		$	62.66	3,071	$	51.40

The Company recognized year-to-date share-based compensation of $19.2 million in 2017 and $16.1 million in 2016. As of September 29, 2017, there was $12.5 million of unrecognized compensation cost related to unvested options, expected to be recognized over a weighted average period of 2.3 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 29, 2017			September 23, 2016
Expected life in years	7.0			7.0
Interest rate	2.2		%	1.4		%
Volatility	26.7		%	30.1		%
Dividend yield	1.6		%	1.8		%
Weighted average fair value per share	$	24.23		$	19.00

Under the Company’s Employee Stock Purchase Plan, the Company issued 167,000 shares in 2017 and 170,000 shares in 2016. 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 29, 2017			September 23, 2016
Expected life in years	1.0			1.0
Interest rate	0.9		%	0.7		%
Volatility	22.3		%	24.6		%
Dividend yield	1.5		%	1.7		%
Weighted average fair value per share	$	21.97		$	19.14