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	9 Months Ended
	May 31, 2013	Sep. 30, 2023	Sep. 30, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		172,106,593	168,543,370
Issuance of class A common stock (in shares)	25,875,000	5,079	2,308,889
Issuance of restricted class A common stock, net (in shares)		489,955	407,581
Issuance of deferred stock units (in shares)		43,656	35,940
Ending balance (in shares)		172,645,283	171,295,780
Deferred stock units held by directors (in shares)		349,232	399,512
Common stock, shares issued under dividend reinvestment program (in shares)		5,079	5,420
Restricted Class A Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares forfeited (in shares)		15,477	33,250
Director | Restricted Class A Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of class A common stock (in shares)		25,482	13,197