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Goodwill and Other Intangible Assets - Estimated Aggregate Future Amortization Expense for Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]    
Remainder of 2014 $ 997  
2015 3,324  
2016 2,412  
2017 1,619  
2018 1,346  
Thereafter 3,423  
Future Amortization Expense, Total $ 13,121 $ 6,345