Goodwill and Identified Intangible Assets - Amortization Expense for Identifiable Purchased Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2013	Mar. 30, 2012
Schedule Of Goodwill By Segment [Line Items]
Total amortization expense	$ 7,033	$ 7,539
Product cost of revenue [Member]
Schedule Of Goodwill By Segment [Line Items]
Total amortization expense	4,945	5,360
Operating Expenses [Member]
Schedule Of Goodwill By Segment [Line Items]
Total amortization expense	$ 2,088	$ 2,179