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Goodwill and Intangible Assets - Estimated Amortization Expense (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]    
Remainder of 2017 $ 3,442  
2018 5,400  
2019 5,400  
2020 5,400  
2021 5,400  
Thereafter 48,572  
Total $ 73,614 $ 77,064