Goodwill and Identified Intangible Assets - Amortization Expense for Identifiable Purchased Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2014	Mar. 29, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 6,666	$ 7,033
Included in cost of revenue[Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total amortization expense	4,716	4,945
Included in operating expenses [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total amortization expense	$ 1,950	$ 2,088