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Investment In Unconsolidated Affiliate (Statement of Operations) (Details) - LSV Asset Management - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Schedule of Equity Method Investments [Line Items]
Revenues	$ 123,017	$ 132,111	$ 243,932	$ 263,829
Net income	$ 97,271	$ 105,605	$ 193,219	$ 210,011

X

- Definition

The amount of net income (loss) reported by an equity method investment of the entity.

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- Definition

Amount of revenue from sale of product and rendering of service reported by equity method investee.

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