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Identifiable Intangible Assets and Goodwill - Expected Future Amortization (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2021, remaining $ 6,479  
2022 7,321  
2023 5,321  
2024 3,360  
2025 3,105  
Thereafter 3,069  
Total $ 28,655 $ 26,205