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Goodwill and Intangible Assets - Schedule of Estimated Amortization Expense (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]    
2017 $ 1,930  
2018 1,886  
2019 1,859  
2020 1,837  
2021 1,332  
2022 and thereafter 102  
Intangible assets, Net Book Value $ 8,946 $ 11,385