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Goodwill and Other Intangible Assets - Estimated Future Amortization Expense Related to Intangible Assets Subject to Amortization (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Estimated amortization expense related to amortized intangible assets    
Remainder of 2021 $ 1,353  
2022 5,109  
2023 4,451  
2024 3,495  
2025 2,200  
Thereafter 49,063  
Intangible assets subject to amortization, Net Carrying Value $ 65,671 $ 70,599