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Goodwill and Intangible Assets - Estimated Future Amortization Expense Related to Intangible Assets (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]    
Remainder of 2017 $ 940  
2018 1,195  
2019 680  
2020 644  
2021 590  
Thereafter 1,450  
Net Value $ 5,499 $ 7,267