Quarterly report [Sections 13 or 15(d)]

Derivatives and Hedging Activities - Effect of Derivative Financial Instruments that are Not Designated as Hedging Instruments on Income Statement (Detail)

v3.25.3
Derivatives and Hedging Activities - Effect of Derivative Financial Instruments that are Not Designated as Hedging Instruments on Income Statement (Detail) - Not Designated as Hedging Instrument - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Derivative Instruments Gain Loss [Line Items]        
Amount of Gain or (Loss) Recognized in Income on Derivative $ 1 $ (44) $ (29) $ (18)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Noninterest Income, Other Operating Income Noninterest Income, Other Operating Income Noninterest Income, Other Operating Income Noninterest Income, Other Operating Income
Interest Rate Products        
Derivative Instruments Gain Loss [Line Items]        
Amount of Gain or (Loss) Recognized in Income on Derivative $ 1 $ (44) $ (29) $ (18)