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Business and Summary of Significant Accounting Policies - Vendor Incentives and Rebates Provided to POS Partners (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
POS Partners      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Marketing expense $ 18.0 $ 13.0 $ 14.0