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Organization and Basis of Presentation - Schedule of Components of Marketable Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Equity securities: |  |
Equity securities, carrying value | $ 84,116 | $ 69,794
Total - Marketable securities |  |
Available for sale debt securities: |  |
Marketable securities, amortized cost | 61,432 | 51,840
Marketable securities, unrealized gain (loss) | 22,684 | 17,954
Marketable securities, carrying value | 84,116 | 69,794
Investment funds - debt securities |  |
Equity securities: |  |
Equity securities, amortized cost | 2,677 | 2,645
Equity securities, unrealized gain (loss) | 6 | (67)
Equity securities, carrying value | 2,683 | 2,578
Common stock, preferred stock and stock funds |  |
Equity securities: |  |
Equity securities, amortized cost | 48,738 | 49,195
Equity securities, unrealized gain (loss) | 22,494 | 18,021
Equity securities, carrying value | 71,232 | $ 67,216
U.S. treasury and agency securities |  |
Available for sale debt securities: |  |
Debt securities, amortized cost | 5,002 |
Debt securities, unrealized gain (loss) | 77 |
Debt securities, carrying value | 5,079 |
Corporate debt securities |  |
Available for sale debt securities: |  |
Debt securities, amortized cost | 4,708 |
Debt securities, unrealized gain (loss) | 99 |
Debt securities, carrying value | 4,807 |
Municipal debt securities |  |
Available for sale debt securities: |  |
Debt securities, amortized cost | 307 |
Debt securities, unrealized gain (loss) | 8 |
Debt securities, carrying value | $ 315 |

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