Subsequent Events- Additional Information (Detail) - $ / shares		1 Months Ended
	Feb. 05, 2021	Aug. 31, 2020
Class A Common Stock
Subsequent Event [Line Items]
Cash dividends declared per share of common stock (in usd per share)		$ 0.10
Class B Common Stock
Subsequent Event [Line Items]
Cash dividends declared per share of common stock (in usd per share)		$ 0.10
Subsequent Event | Class A Common Stock
Subsequent Event [Line Items]
Cash dividends declared per share of common stock (in usd per share)	$ 0.10
Subsequent Event | Class B Common Stock
Subsequent Event [Line Items]
Cash dividends declared per share of common stock (in usd per share)	$ 0.10