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Intangible Assets - Estimated Amortization Expense (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]    
2016 $ 7,272  
2017 7,264  
2018 5,771  
2019 5,771  
2020 5,771  
Thereafter 55,951  
Total $ 87,800 $ 4,212