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Goodwill and Other Intangible Assets - Summary of Estimated Amortization Expense (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]      
2021   $ 106,816  
2022   101,964  
2023   91,133  
2024   87,320  
2025   83,959  
Thereafter   443,254  
Total $ 887,585 $ 914,446 $ 992,244