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Goodwill and Other Intangible Assets - Estimated Future Aggregate Amortization Expense of Intangible Assets (Detail) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]    
Remainder of 2015 $ 8,891  
2016 29,365  
2017 23,965  
2018 23,273  
2019 22,351  
Thereafter 117,568  
Intangible Assets, Net $ 225,413 $ 243,584