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Investment in Unconsolidated Affiliate (Condensed Balance Sheets of LSV) (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]    
Current assets $ 1,519,390 $ 1,453,308
Total Assets 2,397,236 2,383,553
Current liabilities 282,052 397,883
Total Liabilities and Shareholders' Equity 2,397,236 2,383,553
Equity Method Investment, Nonconsolidated Investee    
Schedule of Equity Method Investments [Line Items]    
Current assets 121,830 158,326
Non-current assets 6,662 6,019
Total Assets 128,492 164,345
Current liabilities 64,273 77,306
Non-current liabilities 2,405 3,050
Partners’ capital 61,814 83,989
Total Liabilities and Shareholders' Equity $ 128,492 $ 164,345