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Estimated Future Amortization Expense of Purchased Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Expected Amortization Expense [Line Items]    
2014 (remaining six months) $ 2,194  
2015 4,445  
2016 3,701  
2017 823  
2018 602  
Thereafter 1,191  
Net Assets $ 12,956 $ 15,005