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Goodwill and Intangible Assets - Amortization Expenses for Existing Intangible Assets for the Next Five Years (Detail)
$ in Thousands
Dec. 31, 2020
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Amortization expense for existing other intangible assets, 2021 $ 7,117
Amortization expense for existing other intangible assets, 2022 5,245
Amortization expense for existing other intangible assets, 2023 4,264
Amortization expense for existing other intangible assets, 2024 2,883
Amortization expense for existing other intangible assets, 2025 $ 1,966