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Goodwill and Intangible Assets - Estimated Amortization (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2016 $ 1,106  
2017 1,103  
2018 1,101  
2019 959  
2020 662  
Thereafter 2,440  
Estimated amortization $ 7,371 $ 3,965