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Subsequent Events - Additional Information (Detail) - Subsequent Event [Member]
Oct. 27, 2020
$ / shares
Class A Common Stock [Member]  
Subsequent Event [Line Items]  
Dividend declared per share $ 0.01
Dividend payable declared date Oct. 27, 2020
Dividend payable, date to be paid Dec. 01, 2020
Dividend payable record date Nov. 17, 2020
Class B Common Stock [Member]  
Subsequent Event [Line Items]  
Dividend declared per share $ 0.01
Dividend payable declared date Oct. 27, 2020
Dividend payable, date to be paid Dec. 01, 2020
Dividend payable record date Nov. 17, 2020