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Investment in Unconsolidated Affiliates (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Company's share in the earnings of LSV	$ 126,930	$ 120,667	$ 137,572
Distributions received from LSV	$ 121,582	120,849	131,170
LSV Asset Management
Schedule of Equity Method Investments [Line Items]
Ownership interest in LSV	38.60%
Total investment in LSV	$ 110,781
Company's share in the earnings of LSV	126,930	120,667	137,572
Distributions received from LSV	$ 121,582	$ 120,849	$ 131,170

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