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Stock-Based Compensation (Tables)

9 Months Ended

Sep. 29, 2018

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

Schedule of 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):

	Nine Months Ended   September 29, 2018
	Shares			Average Exercise Price
Options outstanding, beginning of period	6,953			$	36.26
Granted	480			96.13
Canceled	(170	)		52.96
Exercised	(1,518	)		27.68
Options outstanding, end of period	5,745			$	43.04
Options exercisable, end of period	3,323			$	29.22

Schedule of Share-based Compensation, Restricted Stock Units Award 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):

	Nine Months Ended   September 29, 2018
	Units			Weighted Average Grant  Date Fair Value
RSUs outstanding, beginning of period	2,708			$	95.51
Granted	7			99.05
Canceled	—			—
Expired	—			—
Vested	(8	)		88.40
RSUs outstanding, end of period	2,707			$	95.54

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):

	Nine Months Ended   September 29, 2018
	Units			Weighted Average Grant  Date Fair Value
PSUs outstanding, beginning of period	233			$	90.70
Granted	197			86.95
Canceled	(86	)		90.71
Expired	—			—
Vested	(31	)		90.70
PSUs outstanding, end of period	313			$	88.34

Schedule of 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				Nine Months Ended
	September 29, 2018		September 30, 2017		September 29, 2018		September 30, 2017
Risk-free interest rate	2.7% to 3.0%		1.7% to 2.0%		2.3% to 3.0%		1.7% to 2.2%
Expected term (in years)	5.6		5.5		5.6		5.5
Estimated volatility	26.8% to 32.0%		30.3% to 32.1%		26.8% to 32.0%		29.7% to 32.1%
Expected dividends	0%		0%		0%		0%
Weighted-average fair value of options granted	$37.62		$27.70		$31.21		$27.74

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Tabular disclosure of the changes in outstanding nonvested performance-based units.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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-Name Accounting Standards Codification
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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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