Goodwill and Identified Intangible Assets - Estimated Future Amortization Expense of Purchased Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 28, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
2013 (remaining 6 months)	$ 13,524
2014	20,520
2015	6,502
2016	4,096
2017
Total	44,642	58,447
Product cost of revenue [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
2013 (remaining 6 months)	9,525
2014	13,745
2015	719
2016
2017
Total	23,989
Operating Expenses [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
2013 (remaining 6 months)	3,999
2014	6,775
2015	5,783
2016	4,096
2017
Total	$ 20,653