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Goodwill and Other Intangible Assets - Schedule of Amortization Expense of FInite-Lived Intangible Assets Expected to be Recognized (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]    
2019 $ 7,780  
2020 7,060  
2021 5,424  
2022 3,572  
2023 3,040  
Thereafter 3,967  
Net Carrying Value $ 30,843 $ 37,879