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Goodwill and Long-Lived Intangible Assets - Schedule of Future Amortization Expense (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]    
2019 $ 34,782  
2020 15,948  
2021 7,721  
2022 5,756  
2023 2,863  
Thereafter 7,652  
Net carrying amount - Intangible assets $ 74,722 $ 123,008