Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Estimated Amortization Expense (Detail)

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Goodwill and Intangible Assets - Estimated Amortization Expense (Detail) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]    
Remainder of 2018 $ 2,842  
2019 5,680  
2020 5,671  
2021 5,671  
2022 5,671  
Thereafter 45,795  
Net $ 71,330 $ 74,165