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Earnings per Share - Schedule of Antidilutive Securities Excluded from Computation of Basic and Diluted Earnings per Share (Details) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Employee Stock Options And Restricted Stock Units R S U | Common Class B        
Earnings Per Share [Line Items]        
Stock options to purchase Class B shares and RSUs 73 665 342 4,024