Equity - Schedule of Movement in Outstanding Shares of Class A Common Stock, Restricted Class A Common Stock and Deferred Stock Units Footnotes (Detail) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Common stock, shares issued under dividend reinvestment program (in shares)	2,184	2,050	1,214
Restricted Class A Common Stock
Class of Stock [Line Items]
Deferred stock units held by directors (in shares)	363,572	306,691	260,066
Shares forfeited (in shares)	29,580	879	17,565