v3.26.1
Investment Securities - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Debt Securities, Available-for-Sale [Line Items]          
Securities available-for-sale, allowance for credit loss $ 0   $ 0   $ 0
Securities, held to maturity, allowance for credit losses 0   0   0
Proceeds from sales of securities available for sale 0 $ 400,000 0 $ 8,300,000  
Gross losses   78,000 0 619,000  
Gross gains 0 $ 0   $ 0  
Federal Reserve Bank of Boston Discount Window          
Debt Securities, Available-for-Sale [Line Items]          
Carrying value of investment securities pledged as collateral 92,100,000   92,100,000   78,500,000
Federal Home Loan Bank          
Debt Securities, Available-for-Sale [Line Items]          
Carrying value of investment securities pledged as collateral $ 229,900,000   $ 229,900,000   $ 188,700,000