Fair Value of Financial Instruments (Levels) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Investments in securities:
Investments in trading securities	$ 25,748	$ 32,674
Total assets measured at fair value	27,694	32,915
Asset Acquisition, Consideration Transferred, Contingent Consideration	$ 4,700	12,900
Unobservable input - growth discount rate - weighted average	7.25%
Unobservable input - growth discount rate - maximum	7.50%
Unobservable input - growth discount rate - minimum	7.00%
Unobservable input - growth volatility - weighted average	6.90%
Unobservable input - growth volatility - maximum	11.90%
Unobservable input - growth volatility - minimum	1.90%
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	$ 4,657	10,133	$ 12,901
Payment for Contingent Consideration Liability, Financing Activities	(10,357)
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings	4,881	(2,768)
Asset Acquisition, Contingent Consideration, Liability	4,657	10,133
Private equity
Investments in securities:
Equity Securities, FV-NI	1,946	241
Contingent Consideration Type [Domain]
Investments in securities:
Asset Acquisition, Consideration Transferred, Contingent Consideration	4,657	10,133
Other Liabilities, Fair Value Disclosure	4,657	10,133
Level 1
Investments in securities:
Investments in trading securities	25,748	32,674
Total assets measured at fair value	25,748	32,674
Level 1 | Private equity
Investments in securities:
Equity Securities, FV-NI	0	0
Level 2
Investments in securities:
Investments in trading securities	0	0
Total assets measured at fair value	0	0
Level 2 | Private equity
Investments in securities:
Equity Securities, FV-NI	0	0
Level 3
Investments in securities:
Investments in trading securities	0	0
Total assets measured at fair value	0	0
Level 3 | Private equity
Investments in securities:
Equity Securities, FV-NI	0	0
Level 3 | Contingent Consideration Type [Domain]
Investments in securities:
Asset Acquisition, Consideration Transferred, Contingent Consideration	4,657	10,133
Other Liabilities, Fair Value Disclosure	4,657
Fair Value Measured at Net Asset Value Per Share | Private equity
Investments in securities:
Equity Securities, FV-NI	1,946	241
Inputs, Net Asset Value [Member]
Investments in securities:
Investments in trading securities	0	0
Total assets measured at fair value	$ 1,946	$ 241