Stock-Based Compensation Expense (Tables)

3 Months Ended

Mar. 31, 2013

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 unit awards by expense category was as follows:

	Three Months Ended
	March 31, 2013		April 1, 2012
	(In thousands)
Cost of revenues	$	2,875	$	3,512
Research and development		12,409		12,308
Selling, general and administrative		10,262		15,014
Total stock-based compensation expense	$	25,546	$	30,834

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 31, 2013			April 1, 2012
Estimated grant date fair value per share	$	2.33		$	2.86
Expected life (years)		4.38			4.46
Risk-free interest rate		1	%		1	%
Volatility		49	%		47	%

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, 2012		56,042		$	5.75
Granted		6,247		$	6.89
Exercised		(2,192	)	$	3.72
Canceled		(1,006	)	$	8.24
Options outstanding at March 31, 2013		59,091		$	5.90		3.86	$	85,227
Options exercisable at March 31, 2013		39,726		$	5.87		2.72	$	62,059

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, 2012		17,655		$	6.99
Granted		7,227		$	6.90
Vested		(4,461	)	$	6.84
Forfeited		(309	)	$	6.77
Unvested service-based RSUs outstanding at March 31, 2013		20,112		$	7.00

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, 2012		5,634		$	7.29
Granted		1,441		$	6.89
Vested		(2,324	)	$	7.87
Forfeited		(330	)	$	6.40
Unvested performance-based RSUs outstanding at March 31, 2013		4,421		$	6.93