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Goodwill and Other Intangible Assets - Estimated Amortization Expense Related to Intangible Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]    
Year ending December 31, 2017 $ 759  
Year ending December 31, 2018 705  
Total $ 1,464 $ 2,334