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Investment In Unconsolidated Affiliate (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Schedule of Equity Method Investments [Line Items]        
Total investment in LSV $ 53,223   $ 53,223  
Distributions received from LSV     71,478 $ 61,452
Company's share in the earnings of LSV $ 34,219 $ 32,711 $ 65,862 $ 61,590
L S V Asset Management        
Schedule of Equity Method Investments [Line Items]        
Ownership interest in LSV 38.60%   38.60%