Goodwill and Identified Intangible Assets - Estimated Future Amortization Expense of Purchased Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
2016 (remaining three months)	$ 2,191
2017	8,761
2018	8,761
2019	8,761
2020	4,131
Thereafter	516
Total future amortization expense	33,121	$ 4,097
Cost of Sales [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
2016 (remaining three months)	1,380
2017	5,517
2018	5,517
2019	5,517
2020	1,014
Thereafter	0
Total future amortization expense	18,945
Operating Expense [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
2016 (remaining three months)	811
2017	3,244
2018	3,244
2019	3,244
2020	3,117
Thereafter	516
Total future amortization expense	$ 14,176