Investments - Cost and Fair Value of Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Schedule of Held-to-Maturity Securities [Line Items]
Cost	$ 162,507	$ 163,157
Fair Value	162,234	165,894
Cost	7,504	14,194
Fair Value	7,504	14,194
Total Investments, Cost	170,011	177,351
Total Investments, Fair Value	169,738	180,088
Mutual funds
Schedule of Held-to-Maturity Securities [Line Items]
Cost	124	93
Fair Value	110	75
Exchange-traded funds
Schedule of Held-to-Maturity Securities [Line Items]
Cost	100	105
Fair Value	109	108
TIG Arbitrage Associates Master Fund
Schedule of Held-to-Maturity Securities [Line Items]
Cost	489	482
Fair Value	513	500
TIG Arbitrage Enhanced Master Fund
Schedule of Held-to-Maturity Securities [Line Items]
Cost	179	179
Fair Value	227	231
TIG Arbitrage Enhanced
Schedule of Held-to-Maturity Securities [Line Items]
Cost	0	682
Fair Value	0	776
Arkkan Opportunities Feeder Fund
Schedule of Held-to-Maturity Securities [Line Items]
Cost	111	111
Fair Value	129	119
Arkkan Capital Management Limited
Schedule of Held-to-Maturity Securities [Line Items]
Cost	20,062	20,062
Fair Value	25,352	24,822
Zebedee Asset Management
Schedule of Held-to-Maturity Securities [Line Items]
Cost	68,913	68,913
Fair Value	72,280	69,454
Romspen Investment Corporation
Schedule of Held-to-Maturity Securities [Line Items]
Cost	72,523	72,523
Fair Value	63,508	69,802
Real estate equity method investments
Schedule of Held-to-Maturity Securities [Line Items]
Cost	5,628	9,311
Fair Value	5,628	9,311
Wealth management - investment advisory
Schedule of Held-to-Maturity Securities [Line Items]
Cost	99	2,505
Fair Value	99	2,505
Carried interest vehicles
Schedule of Held-to-Maturity Securities [Line Items]
Cost	1,777	2,378
Fair Value	1,777	2,378
Other
Schedule of Held-to-Maturity Securities [Line Items]
Cost	6	7
Fair Value	$ 6	$ 7