Goodwill and Identified Intangible Assets - Estimated Future Amortization Expense of Purchased Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 27, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
2013 (remaining 3 months)	$ 6,760
2014	20,520
2015	6,502
2016	4,096
2017	0
Total	37,878	58,447
Product cost of revenue [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
2013 (remaining 3 months)	4,763
2014	13,745
2015	719
2016	0
2017	0
Total	19,227
Operating Expenses [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
2013 (remaining 3 months)	1,997
2014	6,775
2015	5,783
2016	4,096
2017	0
Total	$ 18,651