Stock-Based Compensation (Tables)

9 Months Ended

Oct. 01, 2011

Stock-Based Compensation

Schedule of assumptions used to estimate fair values using Black-Scholes option-pricing model

	Nine Months Ended
Employee Stock Purchase Plan	October 1, 2011		October 2, 2010
Expected volatility	25.0	%	33.8	%
Risk-free interest rate %	0.3	%	0.6	%
Expected term (in months)	12		15
Dividend yield	—		—

Schedule of stock-based compensation costs recognized in Condensed Consolidated Statements of Income

	Three Months Ended				Nine Months Ended
	October 1,2011		October 2, 2010		October 1,2011		October 2, 2010
Cost of revenues	$	335	$	368	$	1,015	$	1,075
Research and development	3,581		4,371		11,284		12,921
Selling, general and administrative	5,234		5,591		14,925		17,265
	9,150		10,330		27,224		31,261
Income tax benefit	880		1,321		2,695		4,328
	$	8,270	$	9,009	$	24,529	$	26,933