Organization and Basis of Presentation - Schedule of Components of Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Equity securities:
Equity securities, carrying value	$ 82,162	$ 69,794
Marketable Securities
Debt securities:
Marketable securities, amortized cost	61,731	51,840
Marketable securities, unrealized gain (loss)	20,431	17,954
Marketable securities, carrying value	82,162	69,794
Investment funds - debt securities
Equity securities:
Equity securities, amortized cost	2,676	2,645
Equity securities, unrealized gain (loss)	(23)	(67)
Equity securities, carrying value	2,653	2,578
Common stock, preferred stock and stock funds
Equity securities:
Equity securities, amortized cost	49,247	49,195
Equity securities, unrealized gain (loss)	20,367	18,021
Equity securities, carrying value	69,614	$ 67,216
U.S. treasury securities
Debt securities:
Debt securities, amortized cost	4,882
Debt securities, unrealized gain (loss)	28
Debt securities, carrying value	4,910
Corporate debt securities
Debt securities:
Debt securities, amortized cost	4,619
Debt securities, unrealized gain (loss)	55
Debt securities, carrying value	4,674
Municipal debt securities
Debt securities:
Debt securities, amortized cost	307
Debt securities, unrealized gain (loss)	4
Debt securities, carrying value	$ 311

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