Share-Based Compensation (Tables)

12 Months Ended

Jan. 02, 2016

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

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

number and weighted-average exercise price of stock options issued and outstanding under all stock plans, is presented below (in thousands, except for exercise price):



	Year ended January 2, 2016				Year ended January 3, 2015				Year ended December 28, 2013
	Shares		Average Exercise Price		Shares		Average Exercise Price		Shares		Average Exercise Price
Options outstanding, beginning of period	9,956		$	23.59	8,911		$	22.76	8,368		$	22.78
Granted	914		36.18		1,887		24.83		1,653		21.17
Canceled	(218	)	24.33		(416	)	24.46		(795	)	24.53
Expired	—		—		—		—		—		—
Exercised	(1,450	)	19.54		(426	)	10.95		(315	)	10.49
Options outstanding, end of period	9,202		$	25.46	9,956		23.59		8,911		$	22.76
Options exercisable, end of period	5,609		$	24.72	5,859		$	23.63	5,188		$	22.69

Number and Weighted Average Exercise Price of Outstanding and Exercisable Options

The number and weighted-average exercise price of outstanding and exercisable stock options segregated by exercise price ranges (in thousands, except range of exercise prices and remaining contractual life) were as follows:



	Year ended January 2, 2016			Year ended January 3, 2015
	Options Outstanding		Options Exercisable	Options Outstanding		Options Exercisable
Range of Exercise Prices	Number of Options	Average Remaining Contractual Life	Number of Options	Number of Options	Average Remaining Contractual Life	Number of Options
$2.75 to $4.00	—	0	—	67	0.31	67
$4.01 to $12.00	304	0.69	304	639	1.44	639
$12.01 to $16.00	450	1.37	450	539	2.37	539
$16.01 to $23.98	3,698	6.59	1,867	4,256	7.58	1,580
$23.99 to $28.99	2,033	5.72	1,297	2,426	6.54	1,320
$29.00 to $31.99	1,822	4.20	1,429	1,744	4.46	1,435
$32.00 to $38.30	215	7.06	75	97	3.87	92
$38.31 to $41.51	560	7.10	187	188	3.40	187
$41.52 to $43.76	120	9.87	—	—	0	—
Total	9,202	5.56	5,609	9,956	5.94	5,859

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

A summary of unvested RSU award activity is presented below (in thousands) except for per share amounts:



	Year ended January 2, 2016			Year ended January 3, 2015			Year ended December 28, 2013
	Units	Weighted Average Grant Date Fair Value		Units	Weighted Average Grant Date Fair Value		Units	Weighted Average Grant Date Fair Value
RSUs outstanding, beginning of period	—	$	—	—	$	—	—	$	—
Granted	2,703	41.45		—	—		—	—
Canceled	—	—		—	—		—	—
Expired	—	—		—	—		—	—
Vested	—	—		—	—		—	—
RSUs outstanding, end of period	2,703	$	41.45	—	$	—	—	$	—

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 stock options granted at the date of grant were as follows:



	Year ended January 2, 2016	Year ended January 3, 2015	Year ended December 28, 2013
Risk-free interest rate	1.3% to 1.9%	1.4% to 1.9%	0.7% to 1.8%
Expected term	5.5 years to 5.7 years	5.1 years to 5.5 years	5.1 years to 5.5 years
Estimated volatility	32.0% to 37.4%	31.7% to 36.5%	31.2% to 39.6%
Expected dividends	0%	0%	0%
Weighted-average fair value of options granted	$12.20 per share	$7.85 per share	$7.53 per share

Total Share-Based Compensation Expense Included in Consolidated Statements of Comprehensive Income

The following table presents the total share-based compensation expense that is included in each functional line item of the consolidated statements of operations (in thousands):



	Year ended January 2, 2016		Year ended January 3, 2015		Year ended December 28, 2013
Cost of goods sold	$	348	$	436	$	354
Selling, general and administrative	8,139		8,812		9,407
Research and development	2,338		1,757		1,913
Total	$	10,825	$	11,005	$	11,674