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Commitments and Contingencies (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Related Party Transaction [Line Items]        
Total rent expense $ 1.3 $ 1.0 $ 4.0 $ 3.0
Contractual Obligation, Fiscal Year Maturity [Abstract]        
2020 2.1   2.1  
2021 9.3   9.3  
2022 12.0   12.0  
2023 3.2   3.2  
Minority Owner Of Property Under Operating Lease [Member]        
Related Party Transaction [Line Items]        
Total rent expense $ 0.3 $ 0.3 $ 0.8 $ 0.7