Incentive Plans - Summary of Impact of Share-Based Incentive Plans on Compensation and Benefits Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Share-based incentive awards:
Share-based incentive awards	$ 53,437	$ 68,191
RSUs [Member]
Share-based incentive awards:
Share-based incentive awards	26,659	34,805
PRSUs [Member]
Share-based incentive awards:
Share-based incentive awards	245	5,559
Restricted Stock [Member]
Share-based incentive awards:
Share-based incentive awards	4,936	6,067
Profits Interest Participation Rights [Member]
Share-based incentive awards:
Share-based incentive awards	21,448	21,573
DSUs [Member]
Share-based incentive awards:
Share-based incentive awards	$ 149	$ 187