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Debt and Other Obligations - Maturities of Debt (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Maturities of debt    
2021 (remainder of year) $ 2,405  
2022 12,155  
2023 11,818  
2024 11,181  
2025 473,069  
Thereafter 2,552  
Total debt before unamortized discount and debt issuance costs, net 513,180 $ 510,492
Unamortized discount and debt issuance costs, net (6,201) (7,395)
Total debt $ 506,979 $ 503,097