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Goodwill and Intangible Assets - Finite-lived Intangible Assets Weighted-average Useful Lives (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Finite-lived intangible assets    
2021 $ 3,686  
2022 3,491  
2023 3,184  
2024 3,143  
2025 2,908  
Thereafter 13,710  
Net $ 30,122 $ 29,707