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Goodwill and Other Intangibles, Net - Schedule of Intangible Asset Future Amortization Expense (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization expense $ 2,100 $ 2,100 $ 2,500
2019 1,112    
2020 899    
2021 732    
2022 682    
2023 682    
Total $ 4,107