Goodwill and Identified Intangible Assets - Estimated Future Amortization Expense of Purchased Intangible Assets (Detail) - USD ($) $ in Thousands	Apr. 01, 2016	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
2016 (remaining nine months)	$ 12,591
2017	9,320
2018	9,320
2019	9,320
2020	4,860
Thereafter	631
Total future amortization expense	46,042	$ 4,097
Cost of Sales [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
2016 (remaining nine months)	3,844
2017	5,125
2018	5,125
2019	5,125
2020	854
Thereafter	0
Total future amortization expense	20,073
Operating Expense [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
2016 (remaining nine months)	8,747
2017	4,195
2018	4,195
2019	4,195
2020	4,006
Thereafter	631
Total future amortization expense	$ 25,969