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Derivatives and Hedging Activities - Summary of Amount of Gain (Loss) Recognized in Other Noninterest Income in Consolidated Statements of Income Related to Derivative Assets and Liabilities (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Interest Rate Derivatives [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of (Loss) Gain Recognized $ (29) $ (90)
Commodity Derivatives [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of (Loss) Gain Recognized 76  
Derivatives not Designated as Hedging Instruments [Member] | Interest Rate Derivatives [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of (Loss) Gain Recognized (29) $ (90)
Derivatives not Designated as Hedging Instruments [Member] | Commodity Derivatives [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of (Loss) Gain Recognized $ 76