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Estimated Future Amortization Expense of Purchased Intangible Assets with Definite Lives (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Finite Lived Intangible Assets [Line Items]  
2013 (remaining three months) $ 388
2014 1,455
2015 1,455
2016 1,455
2017 1,455
2018 and thereafter 4,364
Total $ 10,572