Equity - Schedule of Movement in Outstanding Shares of Class A Common Stock, Restricted Class A Common Stock and Deferred Stock Units (Detail) - shares	1 Months Ended	3 Months Ended		9 Months Ended
	May 31, 2013	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)				168,543,370	147,086,722
Issuance of class A common stock (in shares)	25,875,000			2,308,889	10,001,429
Issuance of restricted class A common stock, net (in shares)				407,581	234,229
Issuance of deferred stock units (in shares)				35,940	50,009
Ending balance (in shares)		171,295,780	157,372,389	171,295,780	157,372,389
Deferred stock units held by directors (in shares)		399,512	356,700	399,512	356,700
Common stock, shares issued under dividend reinvestment program (in shares)		2,000	480	5,420	1,429
Restricted Class A Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares forfeited (in shares)				33,250	29,580
Restricted Class A Common Stock | Director
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of class A common stock (in shares)				13,197