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Investments - Schedule of Marketable Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Investment Securities - fair value |  |
Cost | $ 120,772 | $ 97,147
Fair Value | 127,914 | 97,304
Sponsored funds |  |
Investment Securities - fair value |  |
Cost | 77,211 | 80,794
Fair Value | 80,303 | 77,433
Equity securities |  |
Investment Securities - fair value |  |
Cost | 17,674 | 16,353
Fair Value | 21,693 | 19,871
Debt securities |  |
Investment Securities - fair value |  |
Cost | 25,887 | 0
Fair Value | $ 25,918 | $ 0

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