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Summary of Significant Accounting Policies, Advertising Expenses (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
General and Administrative Expenses [Member]      
Advertising Expenses [Abstract]      
Advertising costs incurred $ 15.5 $ 14.7 $ 16.3