Investment In Unconsolidated Affiliate (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Apr. 01, 2022	Mar. 31, 2022
Equity Method Investments and Joint Ventures [Abstract]
Ownership interest in LSV	38.60%		38.60%		38.60%	38.70%
Total investment in LSV	$ 46,865		$ 46,865
Distributions received from LSV			69,824	$ 68,064
Company's share in the earnings of LSV	$ 29,813	$ 35,065	$ 62,272	$ 68,415

Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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