Fair Value of Financial Assets and Liabilities - Schedule of Fair Value Measurements on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Net amounts of recognized assets
Financial instruments owned, at fair value—Domestic government debt	$ 170,381	$ 31,141
Financial instruments owned, at fair value—Foreign government debt	14,827	14,164
Financial instruments owned, at fair value—Equities	989	487
Netting and Collateral	(38,289)	(75,718)
Assets, net amounts presented in the statements of financial condition	5,384	3,607
Total	191,581	49,399
Net amounts of recognized Liabilities
Netting and Collateral	(38,289)	(75,718)
Liabilities, net amounts presented in the statements of financial condition	4,430	5,756
Contingent consideration	21,768	11,929
Total	26,198	17,685
FX swaps
Net amounts of recognized assets
Netting and Collateral	(1,183)	(793)
Assets, net amounts presented in the statements of financial condition	4,810	2,674
Net amounts of recognized Liabilities
Netting and Collateral	(1,183)	(793)
Liabilities, net amounts presented in the statements of financial condition	3,679	5,119
Forwards
Net amounts of recognized assets
Netting and Collateral	(56)	(50)
Assets, net amounts presented in the statements of financial condition	409	805
Net amounts of recognized Liabilities
Netting and Collateral	(56)	(62,693)
Liabilities, net amounts presented in the statements of financial condition	751	609
Interest rate swaps
Net amounts of recognized assets
Netting and Collateral	(132)	(12,182)
Assets, net amounts presented in the statements of financial condition	0	128
Net amounts of recognized Liabilities
Netting and Collateral	(132)	(12,182)
Liabilities, net amounts presented in the statements of financial condition	0	0
Futures
Net amounts of recognized assets
Netting and Collateral	(36,918)	(62,693)
Assets, net amounts presented in the statements of financial condition	165	0
Net amounts of recognized Liabilities
Netting and Collateral	(36,918)	(50)
Liabilities, net amounts presented in the statements of financial condition	0	28
Level 1
Net amounts of recognized assets
Financial instruments owned, at fair value—Domestic government debt	170,381	31,141
Financial instruments owned, at fair value—Foreign government debt	0	0
Financial instruments owned, at fair value—Equities	989	487
Total	208,453	31,628
Net amounts of recognized Liabilities
Contingent consideration	0	0
Total	36,918	0
Level 1 | FX swaps
Net amounts of recognized assets
Derivative asset	0	0
Net amounts of recognized Liabilities
Derivative liability	0	0
Level 1 | Forwards
Net amounts of recognized assets
Derivative asset	0	0
Net amounts of recognized Liabilities
Derivative liability	0	0
Level 1 | Interest rate swaps
Net amounts of recognized assets
Derivative asset	0	0
Net amounts of recognized Liabilities
Derivative liability	0	0
Level 1 | Futures
Net amounts of recognized assets
Derivative asset	37,083	0
Net amounts of recognized Liabilities
Derivative liability	36,918	0
Level 2
Net amounts of recognized assets
Financial instruments owned, at fair value—Domestic government debt	0	0
Financial instruments owned, at fair value—Foreign government debt	14,827	14,164
Financial instruments owned, at fair value—Equities	0	0
Total	21,417	93,489
Net amounts of recognized Liabilities
Contingent consideration	0	0
Total	5,801	81,474
Level 2 | FX swaps
Net amounts of recognized assets
Derivative asset	5,993	3,467
Net amounts of recognized Liabilities
Derivative liability	4,862	5,912
Level 2 | Forwards
Net amounts of recognized assets
Derivative asset	465	855
Net amounts of recognized Liabilities
Derivative liability	807	62,721
Level 2 | Interest rate swaps
Net amounts of recognized assets
Derivative asset	132	12,310
Net amounts of recognized Liabilities
Derivative liability	132	12,182
Level 2 | Futures
Net amounts of recognized assets
Derivative asset	0	62,693
Net amounts of recognized Liabilities
Derivative liability	0	659
Level 3
Net amounts of recognized assets
Financial instruments owned, at fair value—Domestic government debt	0	0
Financial instruments owned, at fair value—Foreign government debt	0	0
Financial instruments owned, at fair value—Equities	0	0
Total	0	0
Net amounts of recognized Liabilities
Contingent consideration	21,768	11,929
Total	21,768	11,929
Level 3 | FX swaps
Net amounts of recognized assets
Derivative asset	0	0
Net amounts of recognized Liabilities
Derivative liability	0	0
Level 3 | Forwards
Net amounts of recognized assets
Derivative asset	0	0
Net amounts of recognized Liabilities
Derivative liability	0	0
Level 3 | Interest rate swaps
Net amounts of recognized assets
Derivative asset	0	0
Net amounts of recognized Liabilities
Derivative liability	0	0
Level 3 | Futures
Net amounts of recognized assets
Derivative asset	0	0
Net amounts of recognized Liabilities
Derivative liability	$ 0	$ 0