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Goodwill and Intangible Assets - Amortization (Details)
$ in Thousands
Dec. 31, 2020
USD ($)
Estimated aggregate amortization expense  
2021 $ 12,280
2022 10,018
2023 8,347
2024 6,708
2025 3,136
Thereafter 5,696
Total definite-lived intangible assets $ 46,185