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Goodwill and Intangible Assets - Schedule of Estimated Future Amortization of Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]    
2022 $ 8,830  
2023 6,801  
2024 4,471  
2025 3,264  
2026 2,051  
Thereafter 3,317  
Finite-Lived Intangible Assets, Net, Total $ 28,734 $ 19,289