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Organization and Basis of Presentation - Schedule of Financial Securities (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Equity securities: |  |
Carrying Value | $ 91,295 | $ 87,795
Marketable Securities |  |
Equity securities: |  |
Cost | 77,931 | 77,788
Gross Unrealized Gain (Loss) | 13,364 | 10,007
Carrying Value | 91,295 | 87,795
Investment funds - debt securities |  |
Equity securities: |  |
Cost | 26,590 | 26,460
Gross Unrealized Gain (Loss) | (1,636) | (1,584)
Carrying Value | 24,954 | 24,876
Common stock, preferred stock, and stock funds |  |
Equity securities: |  |
Cost | 51,341 | 51,328
Gross Unrealized Gain (Loss) | 15,000 | 11,591
Carrying Value | $ 66,341 | $ 62,919

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