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Goodwill and Intangible Assets - Future Amortization Expense (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]    
2021 $ 2,325  
2022 8,824  
2023 5,122  
2024 3,693  
2025 3,014  
Thereafter 6,426  
Net Carrying Amount $ 29,404 $ 36,450