Derivatives - Offsetting of Derivatives Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Offsetting Assets [Line Items]
Assets, Gross Amounts	$ 73,974	$ 42,252
Assets, Gross Amounts Offset	(71,095)	(41,321)
Assets, Net Amounts Presented in the Statements of Financial Condition	2,879	931
Liabilities, Gross Amounts	73,944	42,781
Liabilities, Gross Amounts Offset	(71,095)	(41,321)
Liabilities, Net Amounts Presented in the Statements of Financial Condition	2,849	1,460
FX/commodities options
Offsetting Assets [Line Items]
Assets, Gross Amounts		74
Assets, Gross Amounts Offset		0
Assets, Net Amounts Presented in the Statements of Financial Condition		74
FX swaps
Offsetting Assets [Line Items]
Assets, Gross Amounts	3,025	583
Assets, Gross Amounts Offset	(538)	(21)
Assets, Net Amounts Presented in the Statements of Financial Condition	2,487	562
Liabilities, Gross Amounts	2,028	340
Liabilities, Gross Amounts Offset	(538)	(21)
Liabilities, Net Amounts Presented in the Statements of Financial Condition	1,490	319
Futures
Offsetting Assets [Line Items]
Assets, Gross Amounts	70,497	41,257
Assets, Gross Amounts Offset	(70,497)	(41,257)
Assets, Net Amounts Presented in the Statements of Financial Condition	0	0
Liabilities, Gross Amounts	71,437	42,183
Liabilities, Gross Amounts Offset	(70,497)	(41,257)
Liabilities, Net Amounts Presented in the Statements of Financial Condition	940	926
Forwards
Offsetting Assets [Line Items]
Assets, Gross Amounts	452	338
Assets, Gross Amounts Offset	(60)	(43)
Assets, Net Amounts Presented in the Statements of Financial Condition	392	295
Liabilities, Gross Amounts	479	258
Liabilities, Gross Amounts Offset	(60)	(43)
Liabilities, Net Amounts Presented in the Statements of Financial Condition	$ 419	$ 215