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Investment In Unconsolidated Affiliate (Condensed Statements of Operations of LSV) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Schedule of Equity Method Investments [Line Items]        
Revenues $ 481,670 $ 475,651 $ 1,063,113 $ 931,337
Equity Method Investment, Nonconsolidated Investee        
Schedule of Equity Method Investments [Line Items]        
Revenues 99,814 116,392 208,264 227,229
Net income $ 77,193 $ 90,520 $ 160,984 $ 176,440