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Stock-Based Compensation (Tables)

3 Months Ended

Apr. 04, 2015

Stock-Based Compensation [Abstract]

Schedule of Stock-Based Compensation Expense

The consolidated statements of operations for the three months ended April 4, 2015 and March 29, 2014 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 4, 2015			March 29, 2014
Cost of sales			$	674		$	756
Selling and administrative expenses				6,634			6,435
Research and development expenses				1,147			938
	Total stock-based compensation		$	8,455		$	8,129

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 4, 2015 and March 29, 2014 are as follows:

Options Issued and Significant Assumptions Used to Estimate Option Fair Values		April 4, 2015		March 29, 2014
Options issued in thousands		32		32
Risk-free interest rate		1.6%		1.9%
Expected life in years		4		4
Expected volatility		0.267		0.245
Expected dividends		-		-

Weighted-Average Exercise Price and Fair Value of Options on the Date of Grant		April 4, 2015			March 29, 2014
Exercise price		$	113.88		$	99.22
Fair value		$	26.94		$	22.38

Stock Options Outstanding Roll Forward

The following table summarizes stock option activity for the plans for the three months ended April 4, 2015 (in thousands, except per share data):

				Number of Shares		Price per Share						Weighted-Average Exercise Price
Outstanding at December 31, 2014				3,280		$	37.84	to	$	113.36		$	82.85
	Granted			32			$	113.88				$	113.88
	Exercised			(135)		$	37.84	to	$	98.21		$	75.50
	Canceled			(72)		$	79.05	to	$	87.06		$	83.25
Outstanding at April 4, 2015				3,105		$	38.09	to	$	113.88		$	83.48

Restricted Stock Units Unvested Roll Forward

The following table summarizes the unvested restricted stock unit award activity for the three months ended April 4, 2015 (in thousands, except for per share amounts):

			Shares		Weighted-Average Price
Unvested at December 31, 2014			533		$	94.38
	Granted		129		$	118.75
	Vested		(143)		$	85.34
	Forfeited		(2)		$	92.09
Unvested at April 4, 2015			517		$	102.97

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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

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-Name Accounting Standards Codification

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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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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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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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