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Summary of Significant Accounting Policies - Future Amortization of Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Future amortization of intangible assets [Abstract]    
2021 $ 7,215  
2022 5,762  
2023 3,760  
2024 3,360  
2025 3,186  
Thereafter 2,922  
Total $ 26,205 $ 30,048