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Derivatives - Fair Value of Derivative Contracts (Detail) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Assets $ 5,104 $ 3,607
Liabilities 6,690 5,756
Notional Amounts 75,185,454 41,832,765
Forwards    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Assets 1,264 805
Liabilities 703 609
Notional Amounts 375,108 310,880
Futures    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Assets 0 0
Liabilities 49 28
Notional Amounts 7,325,976 6,703,624
FX swaps    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Assets 3,753 2,674
Liabilities 5,938 5,119
Notional Amounts 674,116 545,669
Interest rate swaps    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Assets 87 128
Liabilities 0 0
Notional Amounts $ 66,810,254 $ 34,272,592