Stock Transactions and Unit Redemptions - Gross Unit Redemptions and Share Repurchases of Class A Common Stock Table Footnote (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Weighted-average price for redemption of limited partnership units (in dollars per shares)					$ 5.83	$ 3.03
Repurchase of Class A common stock (in shares)	26,313,000	24,433,000	16,542,000	965,000	68,253,000
Aggregate purchase price of Class A common stock					$ 365,398	$ 6	$ 1,236
Class A Common Stock
Class of Stock [Line Items]
Common stock, shares issued for redemption/cancellation of units (in shares)					27,500,000	9,500,000
Common stock, shares issued for exchange of units (in shares)					32,200,000	3,700,000
Repurchase of Class A common stock (in shares)					68,253,498	2,259	233,172
Aggregate purchase price of Class A common stock					$ 365,400	$ 6
Weighted-average price of Class A common stock (in dollars per share)					$ 5.35	$ 2.58
Limited Partnership
Class of Stock [Line Items]
Redeemed limited partnership units (in shares)					4,700,000	1,800,000
Aggregate redemption price of limited partnership units					$ 27,500	$ 5,500
Other Ownership Interest
Class of Stock [Line Items]
Redeemed limited partnership units (in shares)					100,000	700,000
Aggregate redemption price of limited partnership units					$ 600	$ 1,300
Weighted-average price for redemption of founding/working partner units (in dollars per share)					$ 4.86	$ 1.79