Employee Benefit Plans - Schedule of Reported Share-Based Compensation in Consolidated Financial Statements (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share-based compensation	$ 4,621	$ 4,287	$ 3,543
Income tax benefit
Total share-based compensation, net of tax	4,621	4,287	3,543
Cost of sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share-based compensation	417	420	297
Research and development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share-based compensation	1,364	1,356	1,121
Selling, general and administrative expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share-based compensation	$ 2,840	$ 2,511	$ 2,125