Equity - Schedule of Dividend Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Equity [Abstract]
Dividends declared per share of common stock	$ 0.62	$ 0.62	$ 0.62	$ 0.62	$ 0.62	$ 0.62	$ 1.86	$ 1.86
Class A common stock dividends declared	$ 97,350			$ 90,642			$ 279,659	$ 265,205
Deferred stock unit dividends declared	202			174			591	502
Total dividends declared	$ 97,552			$ 90,816			$ 280,250	$ 265,707