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Goodwill and Intangible Assets - Estimated Future Amortization Expense By Year From Amortizable Intangibles (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2021 (remaining three months) $ 25,311  
2022 101,244  
2023 101,229  
2024 94,027  
2025 83,491  
Thereafter 338,648  
Finite-lived intangible assets, net $ 743,950 $ 806,998