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Summary of Significant Accounting Policies - Cash and Cash Equivalents (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Summary of Significant Accounting Policies      
Restricted Cash, Asset, Statement of Financial Position [Extensible List] Other Assets, Noncurrent Other Assets, Noncurrent Other Assets, Noncurrent
Restricted Cash $ 0.8 $ 0.8 $ 0.9