Goodwill and Identified Intangible Assets - Estimated Future Amortization Expense of Intangible Assets, Excluding the In-Process Research and Development (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2013
Disclosure Estimated Future Amortization Expense Of Intangible Assets Excluding The In Process Research And Development [Abstract]
2013 (remaining 6 months)	$ 10,368
2014	19,089
2015	18,265
2016	17,412
2017	14,607
Thereafter	17,856
Future Amortization Expense, Total	$ 97,597

Goodwill and Identified Intangible Assets - Estimated Future Amortization Expense of Intangible Assets, Excluding the In-Process Research and Development (Detail) (USD $)
In Thousands, unless otherwise specified

6 Months Ended

Jun. 30, 2013

Disclosure Estimated Future Amortization Expense Of Intangible Assets Excluding The In Process Research And Development [Abstract]

2013 (remaining 6 months)

$ 10,368

19,089

18,265

17,412

14,607

17,856

Future Amortization Expense, Total

$ 97,597