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Investment in Unconsolidated Affiliates (Condensed Statements of Operations of LSV) (Details) - LSV Asset Management - Equity Method Investment, Nonconsolidated Investee - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Revenues	$ 391,648	$ 491,700	$ 517,203
Net income	$ 301,620	$ 390,533	$ 410,846

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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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