Derivative Instruments - Schedule of Notional Value and Fair Value of Derivative Instruments (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Notional Value	$ 410,687	$ 446,989
Derivative Assets	13,857	14,518
Derivative Liabilities	11,859	18,180
Exchange-traded futures
Derivative [Line Items]
Notional Value	121,735	116,344
Derivative Assets	47	1
Derivative Liabilities	751	3,511
Currency forwards
Derivative [Line Items]
Notional Value	15,991	34,440
Derivative Assets	4,674	4,951
Derivative Liabilities	4,566	5,597
Interest rate swaps
Derivative [Line Items]
Notional Value	44,545	11,345
Derivative Assets	519	294
Derivative Liabilities	519	349
Credit default swaps
Derivative [Line Items]
Notional Value	83,507	139,607
Derivative Assets	8,436	9,265
Derivative Liabilities	3,240	4,197
Total return swaps
Derivative [Line Items]
Notional Value	94,800	95,021
Derivative Assets	181	6
Derivative Liabilities	2,633	4,391
Option swaps
Derivative [Line Items]
Notional Value	50,109	50,232
Derivative Assets	0	1
Derivative Liabilities	$ 150	$ 135