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Subsequent Events - Additional Information (Narrative) (Details) - Subsequent Event [Member] - $ / shares
Aug. 26, 2021
Aug. 12, 2021
Jul. 29, 2021
Subsequent Events [Line Items]      
Date of payment of dividend Aug. 26, 2021    
Date of record of dividend   Aug. 12, 2021  
Class A Stock      
Subsequent Events [Line Items]      
Quarterly dividend payable amount per share     $ 0.15
Class B Stock      
Subsequent Events [Line Items]      
Quarterly dividend payable amount per share     $ 0.15