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Schedule of Future Amortization Charges Related to Intangible Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]        
2020 $ 12,768      
2021 12,619      
2022 12,498      
2023 11,988      
2024 11,690      
Thereafter 136,814      
Net Book Value $ 198,377 $ 186,583 $ 180,950 $ 121,433