Derivatives - Offsetting of Derivative Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Offsetting Assets [Line Items]
Gross amounts, assets	$ 62,377	$ 43,673
Gross amounts offset, assets	(61,061)	(38,289)
Net amounts presented in the statements of financial condition, assets	1,316	5,384
Gross amounts, liabilities	63,320	42,719
Gross amounts offset, liabilities	(61,061)	(38,289)
Net amounts presented in the statements of financial condition, liabilities	2,259	4,430
FX swaps
Offsetting Assets [Line Items]
Gross amounts, assets	1,042	5,993
Gross amounts offset, assets	(141)	(1,183)
Net amounts presented in the statements of financial condition, assets	901	4,810
Gross amounts, liabilities	1,358	4,862
Gross amounts offset, liabilities	(141)	(1,183)
Net amounts presented in the statements of financial condition, liabilities	1,217	3,679
Forwards
Offsetting Assets [Line Items]
Gross amounts, assets	491	465
Gross amounts offset, assets	(94)	(56)
Net amounts presented in the statements of financial condition, assets	397	409
Gross amounts, liabilities	310	807
Gross amounts offset, liabilities	(94)	(56)
Net amounts presented in the statements of financial condition, liabilities	216	751
Interest rate swaps
Offsetting Assets [Line Items]
Gross amounts, assets	1,602	132
Gross amounts offset, assets	(1,584)	(132)
Net amounts presented in the statements of financial condition, assets	18	0
Gross amounts, liabilities	1,584	132
Gross amounts offset, liabilities	(1,584)	(132)
Net amounts presented in the statements of financial condition, liabilities	0	0
Futures
Offsetting Assets [Line Items]
Gross amounts, assets	59,242	37,083
Gross amounts offset, assets	(59,242)	(36,918)
Net amounts presented in the statements of financial condition, assets	0	165
Gross amounts, liabilities	60,068	36,918
Gross amounts offset, liabilities	(59,242)	(36,918)
Net amounts presented in the statements of financial condition, liabilities	$ 826	$ 0