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Related Parties - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Oct. 26, 2015
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Related Party Transaction [Line Items]        
Fees receivable   $ 560,552 $ 491,861  
Provision (benefit) pursuant to tax receivable agreement   (43,894) (1,209) $ 2,199
Payments under tax receivable agreement   $ 32,208 $ 21,036 $ 10,215
Investment Advisor        
Related Party Transaction [Line Items]        
Type of Revenue [Extensible List]   Asset management fees Asset management fees Asset management fees
Investment Advisor | Sponsored Funds        
Related Party Transaction [Line Items]        
Revenue   $ 538,457 $ 592,985 $ 708,900
Fees receivable   67,598 57,283  
LTBP Trust        
Related Party Transaction [Line Items]        
Provision (benefit) pursuant to tax receivable agreement   (43,894) (1,209) $ 2,199
Payments under tax receivable agreement   32,208    
Payable pursuant to tax receivable agreement   $ 115,087 $ 191,189  
LTBP Trust | Tax Receivable Agreement        
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 (as a percent) 45.00%      
Cash tax saving that may arise from tax basis increases attributable to payments under the amended and restated tax receivable agreement (as a percent) 85.00%