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Investment in Unconsolidated Affiliate (Condensed Balance Sheets of LSV) (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]    
Current assets $ 1,555,024 $ 1,478,116
Total Assets 2,568,437 2,520,003
Current liabilities 275,982 353,047
Total Liabilities and Shareholders' Equity 2,568,437 2,520,003
Equity Method Investment, Nonconsolidated Investee    
Schedule of Equity Method Investments [Line Items]    
Current assets 127,930 169,867
Non-current assets 6,198 6,568
Total Assets 134,128 176,435
Current liabilities 36,673 74,853
Non-current liabilities 1,955 2,182
Partners’ capital 95,500 99,400
Total Liabilities and Shareholders' Equity $ 134,128 $ 176,435