Derivatives - Offsetting of Derivatives Instruments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Offsetting Assets [Line Items]
Assets	$ 79,325	$ 70,033
Assets, gross amounts offset	(75,718)	(66,271)
Assets, net amounts presented in the statements of financial condition	$ 3,607	3,762
Derivative Asset Statement Of Financial Position Extensible Enumeration Not Disclosed Flag	Total derivative assets
Liabilities	$ 81,474	73,904
Liabilities, gross amounts offset	(75,718)	(66,271)
Liabilities, net amounts presented in the statements of financial condition	$ 5,756	7,633
Derivative Liability Statement Of Financial Position Extensible Enumeration Not Disclosed Flag	Total derivative liabilities
FX swaps
Offsetting Assets [Line Items]
Assets	$ 3,467	3,623
Assets, gross amounts offset	(793)	(489)
Assets, net amounts presented in the statements of financial condition	2,674	3,134
Liabilities	5,912	6,285
Liabilities, gross amounts offset	(793)	(489)
Liabilities, net amounts presented in the statements of financial condition	5,119	5,796
Interest rate swaps
Offsetting Assets [Line Items]
Assets	12,310	895
Assets, gross amounts offset	(12,182)	(870)
Assets, net amounts presented in the statements of financial condition	128	25
Liabilities	12,182	870
Liabilities, gross amounts offset	(12,182)	(870)
Liabilities, net amounts presented in the statements of financial condition	0	0
Forwards
Offsetting Assets [Line Items]
Assets	855	746
Assets, gross amounts offset	(50)	(143)
Assets, net amounts presented in the statements of financial condition	805	603
Liabilities	659	712
Liabilities, gross amounts offset	(50)	(143)
Liabilities, net amounts presented in the statements of financial condition	609	569
Futures
Offsetting Assets [Line Items]
Assets	62,693	64,769
Assets, gross amounts offset	(62,693)	(64,769)
Assets, net amounts presented in the statements of financial condition	0	0
Liabilities	62,721	66,037
Liabilities, gross amounts offset	(62,693)	(64,769)
Liabilities, net amounts presented in the statements of financial condition	$ 28	$ 1,268