STOCK PLANS AND STOCK-BASED COMPENSATION

The estimated fair value of our stock-based awards, less expected forfeitures, is amortized over the awards' vesting period on a straight-line basis. The following table presents stock-based compensation included in our consolidated statement of income:



	Three Months Ended						Nine Months Ended
	September 28, 2013			September 29, 2012			September 28, 2013			September 29, 2012
Stock-based compensation expense included in:
Cost of sales	$	1,332		$	1,271		$	4,051		$	3,995
Selling, general and administration	4,715			3,970			14,181			11,833
Stock-based compensation, before income taxes	6,047			5,241			18,232			15,828
Provision for income taxes	(2,103		)	(1,847		)	(6,422		)	(5,615		)
Stock-based compensation, net of tax	$	3,944		$	3,394		$	11,810		$	10,213

The fair value of stock-based awards granted during the first nine months of 2013 and 2012 was estimated on the grant date using the Black-Scholes option-pricing model with the following weighted-average assumptions:



	September 28, 2013			September 29, 2012
Expected life (in years)	4.2 years			4.5 years
Expected volatility	32.7		%	34.9		%
Risk-free interest rate	0.80		%	0.84		%
Expected dividend yield	0		%	0		%
Weighted-average grant date fair value	$	11.17		$	10.94

Stock Options

The following table summarizes stock option activities under our plans:



	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)	Aggregate Intrinsic Value
Options outstanding as of December 29, 2012	5,860,403		$	39.11
Options granted	593,499		$	40.54
Options exercised	(1,729,768	)	$	34.06
Options canceled	(105,040	)	$	45.68
Options outstanding as of September 28, 2013	4,619,094		$	41.04	3.25 years	$	30,997
Options exercisable as of September 28, 2013	3,022,605		$	42.52	2.00 years	$	18,186

As of September 28, 2013, the unrecognized compensation cost related to 1,596,489 unvested stock options expected to vest was $12,634. This unrecognized compensation will be recognized over an estimated weighted-average amortization period of 2.5 years.

The total intrinsic value of options exercised during the nine months ended September 28, 2013 and September 29, 2012 was $17,629 and $2,769, respectively, with intrinsic value defined as the difference between the market price on the date of exercise and the grant date price. The total amount of cash received from the exercise of options during the nine months ended September 28, 2013 and September 29, 2012 was $58,986 and $12,304, respectively. The actual tax benefit realized for the tax deductions from option exercises totaled $6,436 for the nine months ended September 28, 2013. A charge of $1,362 was recorded in capital in excess of par value in the first nine months of 2013 for the excess of deferred tax assets over the actual tax benefits at option exercise. We settle stock option exercises with newly issued common shares.

Restricted Stock

Stock compensation expense associated with restricted common stock is charged for the market value on the date of grant, less estimated forfeitures, and is amortized over the awards' vesting period on a straight-line basis.

The following table summarizes the restricted stock activity for the nine months ended September 28, 2013:



	Restricted Stock		Weighted Average Grant Date Fair Value
Outstanding as of December 29, 2012	934,505		$	35.83
Granted	565,699		40.52
Vested	(371,458	)	40.37
Canceled	(21,433	)	43.75
Outstanding as of September 28, 2013	1,107,313		$	36.55

As of September 28, 2013, the unrecognized compensation cost related to shares of unvested restricted stock expected to vest was $32,752. This unrecognized compensation will be recognized over an estimated weighted-average amortization period of 31.5 months. The total fair value of restricted stock grants that vested during the nine months ended September 28, 2013 and September 29, 2012 was $14,996 and $10,297, respectively. The actual tax benefit realized for the tax deductions from restricted stock grants that vested totaled $5,375 for the nine months ended September 28, 2013.

Performance Based Stock Award Program

On February 22, 2013, we granted 163,847 Performance Share Units (PSUs) to certain executive officers. The PSUs will be paid out in our common stock based upon the results of two metrics: (1) performance based on our earnings per share with certain defined adjustments and (2) our relative stock price market performance based on a 3-year relative Total Shareholder Return calculation. Accordingly, the actual total number of our shares into which the granted PSUs will convert can range from no shares to 327,694 shares. The PSUs will be fully vested in December 2015 and will be paid out in the form of our common stock in the first quarter of 2016. Compensation expense associated with the PSUs of $1,455 was recorded during the nine months ended September 28, 2013.