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Leases - Future Minimum Payments (Details)
$ in Millions
Sep. 30, 2021
USD ($)
Future minimum lease payments for non-cancelable operating leases  
2021 $ 2.1
2022 6.9
2023 6.3
2024 6.2
2025 5.5
Thereafter 3.6
Total future minimum lease payments $ 30.6