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Fair Value of Financial Assets and Liabilities - Fair Value Hierarchy of Financial Assets and Liabilities under U.S. GAAP Guidance (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Net amounts of recognized assets |  |
Financial instruments owned, at fair value - Domestic Government debt | $ 31,175 | $ 30,956
Financial instruments owned, at fair value - Foreign government debt | 7,678 | 9,646
Financial instruments owned, at fair value - Equities | 466 | 1
Financial instruments owned, at fair value - Equities |  | 641
Netting and Collateral | (66,271) | (71,095)
Assets, net amounts presented in the statements of financial condition | 3,762 | 2,879
Total | 43,081 | 44,123
Net amounts of recognized Liabilities |  |
Netting and Collateral | (66,271) | (71,095)
Liabilities, net amounts presented in the statements of financial condition | 7,633 | 2,849
Contingent consideration | 24,279 | 29,756
Total | 31,912 | 32,605
Forwards |  |
Net amounts of recognized assets |  |
Netting and Collateral | (143) | (60)
Assets, net amounts presented in the statements of financial condition | 603 | 392
Net amounts of recognized Liabilities |  |
Netting and Collateral | (143) | (60)
Liabilities, net amounts presented in the statements of financial condition | 569 | 419
FX swaps |  |
Net amounts of recognized assets |  |
Netting and Collateral | (489) | (538)
Assets, net amounts presented in the statements of financial condition | 3,134 | 2,487
Net amounts of recognized Liabilities |  |
Netting and Collateral | (489) | (538)
Liabilities, net amounts presented in the statements of financial condition | 5,796 | 1,490
Futures |  |
Net amounts of recognized assets |  |
Netting and Collateral | (64,769) | (70,497)
Assets, net amounts presented in the statements of financial condition | 0 | 0
Net amounts of recognized Liabilities |  |
Netting and Collateral | (64,769) | (70,497)
Liabilities, net amounts presented in the statements of financial condition | 1,268 | 940
Interest rate swaps |  |
Net amounts of recognized assets |  |
Netting and Collateral | (870) |
Assets, net amounts presented in the statements of financial condition | 25 |
Net amounts of recognized Liabilities |  |
Netting and Collateral | (870) |
Liabilities, net amounts presented in the statements of financial condition | 0 |
Level 1 |  |
Net amounts of recognized assets |  |
Financial instruments owned, at fair value - Domestic Government debt | 31,175 | 30,956
Financial instruments owned, at fair value - Foreign government debt | 0 | 0
Financial instruments owned, at fair value - Equities | 466 | 0
Financial instruments owned, at fair value - Equities |  | 641
Total | 31,641 | 31,597
Net amounts of recognized Liabilities |  |
Contingent consideration | 0 | 0
Total | 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 | FX 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 | 0 | 0
Net amounts of recognized Liabilities |  |
Derivative liability | 0 | 0
Level 1 | Interest rate swaps |  |
Net amounts of recognized assets |  |
Derivative asset | 0 |
Net amounts of recognized Liabilities |  |
Derivative liability | 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 | 7,678 | 9,646
Financial instruments owned, at fair value - Equities | 0 | 1
Financial instruments owned, at fair value - Equities |  | 0
Total | 77,711 | 83,621
Net amounts of recognized Liabilities |  |
Contingent consideration | 0 | 0
Total | 73,904 | 73,944
Level 2 | Forwards |  |
Net amounts of recognized assets |  |
Derivative asset | 746 | 452
Net amounts of recognized Liabilities |  |
Derivative liability | 712 | 479
Level 2 | FX swaps |  |
Net amounts of recognized assets |  |
Derivative asset | 3,623 | 3,025
Net amounts of recognized Liabilities |  |
Derivative liability | 6,285 | 2,028
Level 2 | Futures |  |
Net amounts of recognized assets |  |
Derivative asset | 64,769 | 70,497
Net amounts of recognized Liabilities |  |
Derivative liability | 66,037 | 71,437
Level 2 | Interest rate swaps |  |
Net amounts of recognized assets |  |
Derivative asset | 895 |
Net amounts of recognized Liabilities |  |
Derivative liability | 870 |
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
Financial instruments owned, at fair value - Equities |  | 0
Total | 0 | 0
Net amounts of recognized Liabilities |  |
Contingent consideration | 24,279 | 29,756
Total | 24,279 | 29,756
Level 3 | Forwards |  |
Net amounts of recognized assets |  |
Derivative asset | 0 | 0
Net amounts of recognized Liabilities |  |
Derivative liability | 0 | 0
Level 3 | FX 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
Level 3 | Interest rate swaps |  |
Net amounts of recognized assets |  |
Derivative asset | 0 |
Net amounts of recognized Liabilities |  |
Derivative liability | $ 0 |

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