Investments - Schedule of Cost and Fair Value of Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Schedule of Held-to-Maturity Securities [Line Items]
Investment at Fair Value, Cost	$ 162,380	$ 162,499
Investment at Fair Value, Fair Value	152,254	148,674
Equity method investments, Cost	135	20,403
Equity method investments, Fair Value	135	20,403
Total Investments, Cost	162,515	182,902
Total Investments, Fair Value	152,389	169,077
Mutual funds
Schedule of Held-to-Maturity Securities [Line Items]
Investment at Fair Value, Cost	38	122
Investment at Fair Value, Fair Value	42	105
Exchange-traded funds and BDC funds
Schedule of Held-to-Maturity Securities [Line Items]
Investment at Fair Value, Cost	17	101
Investment at Fair Value, Fair Value	34	112
TIG Arbitrage Associates Master Fund
Schedule of Held-to-Maturity Securities [Line Items]
Investment at Fair Value, Cost	482	482
Investment at Fair Value, Fair Value	557	515
TIG Arbitrage Enhanced Master Fund
Schedule of Held-to-Maturity Securities [Line Items]
Investment at Fair Value, Cost	179	179
Investment at Fair Value, Fair Value	1,546	229
Arkkan Opportunities Feeder Fund
Schedule of Held-to-Maturity Securities [Line Items]
Investment at Fair Value, Cost	111	111
Investment at Fair Value, Fair Value	152	139
Arkkan Capital Management Limited
Schedule of Held-to-Maturity Securities [Line Items]
Investment at Fair Value, Cost	20,062	20,062
Investment at Fair Value, Fair Value	19,361	21,181
Zebedee Asset Management
Schedule of Held-to-Maturity Securities [Line Items]
Investment at Fair Value, Cost	68,913	68,913
Investment at Fair Value, Fair Value	81,822	80,127
Romspen Investment Corporation
Schedule of Held-to-Maturity Securities [Line Items]
Investment at Fair Value, Cost	72,523	72,523
Investment at Fair Value, Fair Value	48,684	46,260
Other
Schedule of Held-to-Maturity Securities [Line Items]
Investment at Fair Value, Cost	55	6
Investment at Fair Value, Fair Value	56	6
Real estate equity method investments
Schedule of Held-to-Maturity Securities [Line Items]
Equity method investments, Cost	0	0
Equity method investments, Fair Value	0	0
Wealth management - investment advisory
Schedule of Held-to-Maturity Securities [Line Items]
Equity method investments, Cost	135	20,403
Equity method investments, Fair Value	135	20,403
Carried interest vehicles
Schedule of Held-to-Maturity Securities [Line Items]
Equity method investments, Cost	0	0
Equity method investments, Fair Value	$ 0	$ 0