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Organization and Summary of Significant Accounting Policies - Currency Translation (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Foreign currency transaction gain (loss), before tax $ (1.7) $ (0.5) $ (6.5)