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Leases - Maturities (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Operating Leases    
2022 $ 2.2  
2023 2.2  
2024 2.1  
2025 2.0  
2026 1.5  
2027-Thereafter 3.5  
Total lease payments 13.5  
Less: imputed interest 1.8  
Total lease liabilities $ 11.7 $ 10.2