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Derivatives and Hedging Activities - Summary of Amount of Gain (Loss) Recognized in Other Non-interest Expense in Consolidated Statements of Income Related to Derivative Assets and Liabilities (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Interest Rate Derivatives [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of (Loss) Gain Recognized $ 45 $ (94) $ (137) $ (27)
Commodity Derivatives [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of (Loss) Gain Recognized 82   82  
Derivatives not Designated as Hedging Instruments [Member] | Interest Rate Derivatives [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of (Loss) Gain Recognized 45 $ (94) (137) $ (27)
Derivatives not Designated as Hedging Instruments [Member] | Commodity Derivatives [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of (Loss) Gain Recognized $ 82   $ 82