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Investments - Additional Information (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Jul. 31, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Mar. 28, 2022
Jan. 31, 2022
Schedule of Investments [Line Items]            
Income (Loss) from Equity Method Investments   $ 6,231 $ 6,655 $ 7,999    
Special Charges, Including Business Realignment Costs   7,305 2,921 3,126    
Amortization of Intangible Assets       336    
Net Realized and Unrealized Gains (Losses) on Private Equity Fund Investments   (101) 946 347    
Previously Received Carried Interest Subject to Repayment   0        
Total Assets   4,173,971 3,703,298 3,620,923    
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount   5,138 5,762      
Equity Securities without Readily Determinable Fair Value, Amount   625 636      
Variable Interest Entity, Not Primary Beneficiary [Member]            
Schedule of Investments [Line Items]            
Total Assets   2,956 3,580      
Equity Method Investments [Member]            
Schedule of Investments [Line Items]            
Amortization of Intangible Assets   $ 316 316 316    
Atalanta Sosnoff [Member]            
Schedule of Investments [Line Items]            
Equity Method Investment, Ownership Percentage   49.00%        
Income (Loss) from Equity Method Investments   $ 3,127 1,903 2,319    
Seneca Evercore [Member]            
Schedule of Investments [Line Items]            
Equity Method Investment, Ownership Percentage   20.00%        
Income (Loss) from Equity Method Investments   $ 290 230 404    
ABS [Member]            
Schedule of Investments [Line Items]            
Equity Method Investment, Ownership Percentage 26.00%       26.00% 46.00%
Income (Loss) from Equity Method Investments   2,031 4,132 4,463    
Proceeds from Sale of Equity Method Investments $ 18,113     18,300    
ABS [Member] | Other Revenue, Including Interest and Investments            
Schedule of Investments [Line Items]            
Equity Method Investment, Realized Gain (Loss) on Disposal   615   1,294    
Luminis [Member]            
Schedule of Investments [Line Items]            
Income (Loss) from Equity Method Investments   783 $ 390 $ 813    
Special Charges, Including Business Realignment Costs   7,305        
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax   581        
Reclassification from Noncontrolling Interest, Current Period, Net of Tax   $ 77