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Goodwill and Intangible Assets (Detail) - Estimated Future Amortization Expense By Year From Amortizable Intangibles (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2014 (remaining three months) $ 2,475  
2015 8,345  
2016 6,990  
2017 5,570  
2018 4,330  
After 2018 5,805  
Finite-lived intangible assets, net $ 33,515 $ 6,107