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Investment In Unconsolidated Affiliate (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Schedule of Equity Method Investments [Line Items]
Total investment in LSV	$ 54,318		$ 54,318
Distributions received from LSV			61,452	$ 69,824
Company's share in the earnings of LSV	$ 32,711	$ 29,813	$ 61,590	$ 62,272
L S V Asset Management
Schedule of Equity Method Investments [Line Items]
Ownership interest in LSV	38.60%		38.60%

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