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Stock-Based Compensation - (Tables)

12 Months Ended

Dec. 29, 2018

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

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

	Year ended December 29, 2018							Year ended December 30, 2017							Year ended December 31, 2016
	Shares			Average Exercise Price				Shares			Average Exercise Price				Shares			Average Exercise Price
Options outstanding, beginning of period	6,953			$	36.26			8,521			$	28.56			9,202			$	25.46
Granted	564			98.47				928			86.69				1,290			39.94
Canceled/Forfeited	(233	)		67.45				(250	)		38.59				(172	)		29.13
Exercised	(1,608	)		27.62				(2,246	)		27.63				(1,799	)		20.76
Options outstanding, end of period	5,676			$	43.61			6,953			$	36.26			8,521			$	28.56
Options exercisable, end of period	3,273			$	29.63			3,812			$	26.28			4,988			$	26.33

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 December 29, 2018								Year ended December 30, 2017
	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
$15.00 to $35.00	2,956			4.24		2,560			4,442			4.47		3,418
$35.01 to $55.00	1,341			6.97		548			1,536			7.86		379
$55.01 to $75.00	72			7.75		20			101			8.82		15
$75.01 to $95.00	1,076			8.75		141			855			9.59		—
$95.01 to $115.00	160			9.54		4			19			9.40		—
$115.01 to $125.00	71			9.73		—			—			0.00		—
Total	5,676			6.01		3,273			6,953			5.92		3,812

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

The number of RSUs issued and outstanding under all of the Company’s equity plans are as follows (in thousands, except for weighted average grant date fair value amounts):

	Year ended December 29, 2018							Year ended December 30, 2017							Year ended December 31, 2016
	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	2,708			$	95.51			2,706			$	95.40			2,703			$	41.45
Granted	7			99.05				33			86.42				6			43.09
Canceled/Forfeited	—			—				(25	)		85.79				—			—
Vested	(8	)		88.40				(6	)		43.09				(3	)		41.45
RSUs outstanding, end of period	2,707			$	95.54			2,708			$	95.51			2,706			$	41.45

Schedule of Nonvested Performance-based Units Activity

The number of PSUs outstanding under all of the Company’s equity plans are as follows (in thousands, except for weighted average grant date fair value amounts):

	Year ended December 29, 2018							Year ended December 30, 2017							Year ended December 31, 2016
	Units			Weighted Average Grant Date Fair Value				Units			Weighted Average Grant Date Fair Value				Units			Weighted Average Grant Date Fair Value
PSUs outstanding, beginning of period	233			$	90.70			—			$	—			—			$	—
Granted	197			86.95				248			90.71				—			—
Canceled/Forfeited	(86	)		90.71				(15	)		90.87				—
Vested	(31	)		90.70				—			—				—			—
PSUs outstanding, end of period	313			$	88.34			233			$	90.70			—			$	—

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 December 29, 2018		Year ended December 30, 2017		Year ended December 31, 2016
Risk-free interest rate	2.3% to 3.1%		1.7% to 2.2%		1.0% to 2.1%
Expected term	5.2 years to 5.6 years		5.5 years to 5.6 years		5.5 years to 5.7 years
Estimated volatility	26.8% to 32.0%		29.7% to 32.1%		29.8% to 35.7%
Expected dividends	0%		0%		0%
Weighted-average fair value of options granted	$31.85 per share		$27.81 per share		$13.64 per share

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

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

	Year ended December 29, 2018				Year ended December 30, 2017				Year ended December 31, 2016
Cost of goods sold	$	334			$	351			$	355
Selling, general and administrative	21,391				13,272				9,443
Research and development	5,692				3,564				2,705
Total	$	27,417			$	17,187			$	12,503

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Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

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