Stock-Based Compensation (Tables)

3 Months Ended

Apr. 02, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

(in thousands, except for grant date fair value amounts):



	Three Months Ended April 2, 2016
	Units	Weighted Average Grant Date Fair Value
RSUs outstanding, beginning of period	2,703	$	41.45
Granted	—	—
Canceled	—	—
Expired	—	—
Vested	—	—
RSUs outstanding, end of period	2,703	$	41.45

Number and Weighted Average Exercise Price of Options Issued and Outstanding under all Stock Option Plans

The number and weighted-average exercise price of options issued and outstanding under all of the Company’s stock option plans are as follows (in thousands, except for exercise prices):



	Three Months Ended April 2, 2016
	Shares		Average Exercise Price
Options outstanding, beginning of period	9,202		$	25.46
Granted	1,101		37.87
Canceled	(32	)	24.72
Exercised	(199	)	17.29
Options outstanding, end of period	10,072		$	26.98
Options exercisable, end of period	5,870		$	25.10

Range of Assumptions Used and Resulting Weighted-Average Fair Value of Options Granted at Date of Grant

The range of assumptions used and the resulting weighted-average fair value of options granted at the date of grant were as follows:



	Three Months Ended
	April 2, 2016	April 4, 2015
Risk-free interest rate	1.3% to 1.9%	1.3% to 1.8%
Expected term (in years)	5.7	5.5
Estimated volatility	34.6% to 35.7%	33.5% to 37.4%
Expected dividends	0%	0%
Weighted-average fair value of options granted	$13.13	$10.35