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Investment In Unconsolidated Affiliate (Statement of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Schedule of Equity Method Investments [Line Items]
Revenues	$ 455,686	$ 414,762
Equity Method Investment, Nonconsolidated Investee | LSV Asset Management
Schedule of Equity Method Investments [Line Items]
Revenues	110,837	99,996
Net income	$ 85,920	$ 76,897

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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