Related Parties - Additional Information (Detail) - USD ($) $ in Thousands		12 Months Ended
	Oct. 26, 2015	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Fees receivable		$ 491,861	$ 669,464
Provision (benefit) pursuant to tax receivable agreement		$ (1,209)	2,199	$ (439)
Amended and Restated Tax Receivable Agreement [Member]
Related Party Transaction [Line Items]
Tax agreement termination year		2033
Sponsored Funds [Member]
Related Party Transaction [Line Items]
Revenue		$ 592,985	$ 708,900	$ 564,686
Type of Revenue [Extensible List]		Asset Management Fees [Member]	Asset Management Fees [Member]	Asset Management Fees [Member]
Fees receivable			$ 57,283	$ 96,740
LTBP Trust [Member]
Related Party Transaction [Line Items]
Amount of cash savings in income or franchise tax that would be realized as a result of increases in tax basis and certain other tax benefits related to the amended and restated tax receivable agreement	45.00%
Cash tax saving that may arise from tax basis increases attributable to payments under the amended and restated tax receivable agreement	85.00%
Provision (benefit) pursuant to tax receivable agreement		$ (1,209)	2,199	$ (439)
Cumulative liability relating to obligations under Amended and Restated Tax Receivable Agreement		$ 191,189	$ 213,434