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Derivatives - Summary of Interest Rate Swap Transactions (Detail) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Derivatives Fair Value [Line Items]    
Fair Value of total before netting adjustments $ 7,030 $ 11,638
Fair Value of Netting adjustments - cash collateral posted by counterparties (3,900) (6,330)
Total Swap assets 3,130 5,308
Fair Value of total before netting adjustments 7,030 11,638
Total Swap liabilities 7,030 11,638
Long [Member] | Interest Rate Swap [Member]    
Derivatives Fair Value [Line Items]    
Interest Rate Swaps With Loan Customers In An Asset Position Notional Amount 108,797 68,621
Fair Value Of Interest Rate Swaps With Loan Customers In An Asset Position 2,865 1,169
Short [Member] | Financial Institutions Asset Position [Member]    
Derivatives Fair Value [Line Items]    
Counterparty Positions With Financial Institutions In An Asset Position Notional Amount 258,000 247,727
Fair Value Of Counterparty Positions With Financial Institutions In An Asset Position 4,165 10,469
Short [Member] | Interest Rate Swap [Member]    
Derivatives Fair Value [Line Items]    
Interest Rate Swaps With Loan Customers In A Liability Position Notional Amount 149,203 179,106
Fair Value Of Interest Rate Swaps With Loan Customers In A Liability Position $ 7,030 $ 11,638