Stock-Based Compensation (Tables)

3 Months Ended

Mar. 30, 2014

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation Expense, Net of Estimated Forfeitures

Stock-based compensation expense, net of estimated forfeitures, related to the Company’s stock options, Employee Stock Purchase Plan (“ESPP”) and restricted stock units (“RSUs”) by expense category was as follows:

	Three Months Ended
	March 30, 2014		March 31, 2013
	(In thousands)
Cost of revenues	$	2,458	$	2,875
Research and development		10,295		12,409
Selling, general and administrative		8,232		10,262
Total stock-based compensation expense	$	20,985	$	25,546

Summary of Weighted-Average Assumptions in Fair Value of Option Grant

The following table summarizes the weighted-average assumptions that the Company applied in the lattice model:

	Three Months Ended
	March 30, 2014			March 31, 2013
Estimated grant date fair value per share	$	2.87		$	2.33
Expected life (years)		4.45			4.38
Risk-free interest rate		1	%		1	%
Volatility		34	%		49	%

Summary of Changes in Stock Options Outstanding

The following table summarizes changes in stock options outstanding:

	Number of Shares			Weighted-Average Exercise Price Per Share		Weighted-Average Remaining Contractual Term		Aggregate Intrinsic Value
	(In thousands)					(In years)		(In thousands)
Options outstanding at December 31, 2013		43,948		$	5.87
Granted		3,360		$	11.09
Exercised		(7,801	)	$	6.66
Canceled		(228	)	$	6.72
Options outstanding at March 30, 2014		39,279		$	6.16		3.93	$	193,014
Options exercisable at March 30, 2014		25,110		$	5.28		2.92	$	145,388

Summary of Unvested Service-Based Restricted Stock

The following table summarizes changes in service-based RSUs outstanding:

	Number of Units			Weighted-Average Grant Date Fair Value per Share
	(In thousands)
Unvested service-based RSUs outstanding at December 31, 2013		19,543		$	7.07
Granted		5,163		$	11.09
Vested		(5,508	)	$	6.89
Forfeited		(464	)	$	7.24
Unvested service-based RSUs outstanding at March 30, 2014		18,734		$	8.22

Summary of Unvested Performance-Based Restricted Stock

The following table summarizes changes in performance-based RSUs outstanding:

	Number of Units		Weighted-Average Grant Date Fair Value per Share
	(In thousands)
Unvested performance-based RSUs outstanding at December 31, 2013		3,516	$	7.10
Granted		1,188	$	11.09
Vested		—	$	—
Forfeited		—	$	—
Unvested performance-based RSUs outstanding at March 30, 2014		4,704	$	8.11