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Investments - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Mar. 28, 2022
Jan. 31, 2022
Schedule of Investments [Line Items]              
Income from Equity Method Investments $ 1,542 $ 2,274 $ 3,010 $ 4,786      
Net Realized and Unrealized Gains (Losses) on Private Equity Fund Investments 318 19 640 (64)      
Previously Received Carried Interest Subject to Repayment 353   353        
Total Assets 3,051,444 3,011,488 3,051,444 3,011,488 $ 3,620,923    
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 5,613   5,613   5,385    
Equity Securities without Readily Determinable Fair Value, Amount 635   635   604    
Variable Interest Entity, Not Primary Beneficiary [Member]              
Schedule of Investments [Line Items]              
Total Assets 3,430   3,430   $ 3,166    
Equity Method Investments [Member]              
Schedule of Investments [Line Items]              
Amortization of Intangible Assets $ 79 79 $ 158 158      
ABS [Member]              
Schedule of Investments [Line Items]              
Equity Method Investment, Ownership Percentage 26.00%   26.00%     26.00% 46.00%
Income from Equity Method Investments $ 1,064 1,171 $ 2,070 2,370      
Proceeds from Sale of Equity Method Investments       18,300      
ABS [Member] | Other Revenue, Including Interest and Investments              
Schedule of Investments [Line Items]              
Equity Method Investment, Realized Gain (Loss) on Disposal       1,294      
Atalanta Sosnoff [Member]              
Schedule of Investments [Line Items]              
Equity Method Investment, Ownership Percentage 49.00%   49.00%        
Income from Equity Method Investments $ 335 939 $ 726 1,878      
Luminis [Member]              
Schedule of Investments [Line Items]              
Equity Method Investment, Ownership Percentage 20.00%   20.00%        
Income from Equity Method Investments $ 135 102 $ 297 390      
Seneca Evercore [Member]              
Schedule of Investments [Line Items]              
Equity Method Investment, Ownership Percentage 20.00%   20.00%        
Income from Equity Method Investments $ 8 $ 62 $ (83) $ 148