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Debt - Future Minimum Payments (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Long-term Debt, Fiscal Year Maturity [Abstract]    
2021 (excluding the nine months ended September 30, 2021) $ 500  
2022 2,000  
2023 2,000  
2024 20,000  
2025 20,000  
Thereafter 155,500  
Total $ 200,000 $ 200,000