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Estimated Future Amortization Expense of Purchased Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Expected Amortization Expense [Line Items]    
2014 (remaining 9 months) $ 3,275  
2015 4,426  
2016 3,682  
2017 807  
2018 591  
Thereafter 1,191  
Net Assets $ 13,972 $ 15,005