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Intangible Assets - Schedule of Expected Future Annual Amortization Expense for Unamortized Intangible Assets (Details)
$ in Thousands
Sep. 30, 2021
USD ($)
Finite Lived Intangible Assets Net Amortization Expense Fiscal Maturity [Abstract]  
2021 (excluding the nine months ended September 30, 2021) $ 4,643
2022 18,570
2023 18,570
2024 18,570
2025 18,570
Thereafter 69,639
Total $ 148,562