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Summary of Significant Accounting Policies (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
segment
Jun. 30, 2020
USD ($)
Finite-Lived Intangible Assets [Line Items]        
Number of reportable segments | segment     3  
Advertising expense $ 11.8 $ 6.7 $ 20.2 $ 21.2
Capitalized internal-use software development costs $ 9.1 $ 9.9 $ 19.5 $ 22.9
Minimum        
Finite-Lived Intangible Assets [Line Items]        
Intangible assets, useful life     2 years  
Maximum        
Finite-Lived Intangible Assets [Line Items]        
Intangible assets, useful life     5 years