Derivative Instruments - Schedule of Notional Value and Fair Value of Derivative Instruments (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Derivative [Line Items]
Notional Value	$ 673,290	$ 446,989
Derivative Assets	13,038	14,518
Derivative Liabilities	17,908	18,180
Exchange-traded futures
Derivative [Line Items]
Notional Value	157,146	116,344
Derivative Assets	106	1
Derivative Liabilities	3,004	3,511
Currency forwards
Derivative [Line Items]
Notional Value	26,905	34,440
Derivative Assets	5,208	4,951
Derivative Liabilities	5,430	5,597
Interest rate swaps
Derivative [Line Items]
Notional Value	23,936	11,345
Derivative Assets	215	294
Derivative Liabilities	1,113	349
Credit default swaps
Derivative [Line Items]
Notional Value	203,910	139,607
Derivative Assets	7,235	9,265
Derivative Liabilities	6,114	4,197
Total return swaps
Derivative [Line Items]
Notional Value	211,368	95,021
Derivative Assets	274	6
Derivative Liabilities	1,931	4,391
Option swaps
Derivative [Line Items]
Notional Value	50,025	50,232
Derivative Assets	0	1
Derivative Liabilities	$ 316	$ 135