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Stock-Based Compensation (Tables)

3 Months Ended

Apr. 02, 2016

Stock-Based Compensation [Abstract]

Schedule of Stock-Based Compensation Expense

The consolidated statements of operations for the three months ended April 2, 2016 and April 4, 2015 include the following stock-based compensation expense related to stock option awards, restricted stock, restricted stock unit awards and the employee stock purchase plan (in thousands):

			Three Months Ended
			April 2, 2016			April 4, 2015
Cost of sales			$	671		$	674
Selling and administrative expenses				13,969			6,634
Research and development expenses				1,201			1,147
	Total stock-based compensation		$	15,841		$	8,455

Relevant Data Used to Determine the Value of Stock Options Granted During the Period

The relevant data used to determine the value of the stock options granted during the three months ended April 2, 2016 and April 4, 2015 are as follows:

Options Issued and Significant Assumptions Used to Estimate Option Fair Values		April 2, 2016		April 4, 2015
Options issued in thousands		86		32
Risk-free interest rate		1.5%		1.6%
Expected life in years		5		4
Expected volatility		0.286		0.267
Expected dividends		-		-

Weighted-Average Exercise Price and Fair Value of Options on the Date of Grant		April 2, 2016			April 4, 2015
Exercise price		$	122.65		$	113.88
Fair value		$	34.63		$	26.94

Stock Options Outstanding Roll Forward

The following table summarizes stock option activity for the plans for the three months ended April 2, 2016 (in thousands, except per share data):

				Number of Shares		Price per Share						Weighted-Average Exercise Price
Outstanding at December 31, 2015				3,154		$	38.09	to	$	134.37		$	96.73
	Granted			86		$	117.68	to	$	130.35		$	122.65
	Exercised			(84)		$	44.25	to	$	113.36		$	81.97
	Canceled			(54)		$	79.15	to	$	128.93		$	110.99
Outstanding at April 2, 2016				3,102		$	38.09	to	$	134.37		$	97.60

Restricted Stock Units Unvested Roll Forward

Restricted Stock Units

The following table summarizes the unvested restricted stock unit award activity for the three months ended April 2, 2016 (in thousands, except for per share amounts):

			Shares		Weighted-Average Price
Unvested at December 31, 2015			497		$	104.16
	Granted		135		$	117.68
	Vested		(134)		$	97.51
	Forfeited		(1)		$	101.87
Unvested at April 2, 2016			497		$	109.63

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Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Paragraph 1
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
-Section F

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Tabular disclosure of the changes in outstanding nonvested restricted stock units.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

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-Publisher FASB
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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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