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Goodwill and Intangible Assets - Summary of Amortization expenses (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]    
Remainder of 2019 $ 11,864  
2020 14,052  
2021 14,124  
2022 14,317  
2023 14,155  
Thereafter 13,851  
Net carrying Amount $ 82,363 $ 88,030