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Investment In Unconsolidated Affiliate (Condensed Statements of Operations of LSV) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Schedule of Equity Method Investments [Line Items]        
Revenues $ 471,334 $ 485,322 $ 1,534,447 $ 1,416,659
Equity Method Investment, Nonconsolidated Investee        
Schedule of Equity Method Investments [Line Items]        
Revenues 91,588 115,728 299,852 342,957
Net income $ 69,013 $ 90,365 $ 229,997 $ 266,805