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Goodwill and Intangible Assets - Estimated Future Amortization Expense Related to Intangible Assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]    
Remainder of 2017 $ 1,820  
2018 1,172  
2019 659  
2020 624  
2021 571  
Thereafter 1,398  
Net Value $ 6,244 $ 7,267