v3.26.1
INVESTMENT SECURITIES - Narrative (Details)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
security
investment
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
security
investment
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
investment
security
Debt Securities, Available-for-Sale [Line Items]          
Accrued interest receivable on debt securities $ 1,300,000   $ 1,300,000   $ 1,100,000
Amortized cost of debt securities available-for-sale, at fair value 316,289,000   316,289,000   237,191,000
Held-to-maturity debt securities pledged as collateral 52,761,000   52,761,000   $ 52,936,000
Gross realized gains (losses) for sales and calls of available-for-sale debt securities $ 0 $ 0 $ 0 $ 0  
Number of available-for-sale debt securities in a gross unrealized loss position | security 112   112   78
Available-for-sale debt securities in a gross unrealized loss position $ 8,515,000   $ 8,515,000   $ 4,807,000
Number of available-for-sale debt securities with total unrealized losses in a continual loss position for 12 months or longer | security 61   61   63
Unrealized losses in a continual loss position for 12 months or longer $ 4,884,000   $ 4,884,000   $ 4,443,000
Net unrealized loss on available-for-sale debt securities     7,500,000   2,300,000
AOCI, debt securities, available-for-sale, adjustment, after tax (5,300,000)   (5,300,000)   (1,600,000)
Debt securities available-for-sale, at fair value (amortized cost of $316,289 and $237,191 at June 30, 2026 and December 31, 2025) $ 308,792,000   $ 308,792,000   $ 234,890,000
Number of held-to-maturity debt securities | security 61   61   61
Debt securities held-to-maturity, unrealized loss position, fair value $ 49,100,000   $ 49,100,000   $ 49,300,000
Unrecognized losses on held-to-maturity debt securities 3,707,000   3,707,000   $ 3,628,000
Provision for credit losses on available-for-sale debt securities   0 0    
Provision for credit losses on held-to-maturity debt securities 0     0  
Federal Reserve Bank stock purchased 1,000   9,000    
FHLB stock purchased $ 0   $ 0    
Number of banker's ban stocks invested in | investment 2   2   2
Standard & Poor's, AA Rating And Above          
Debt Securities, Available-for-Sale [Line Items]          
Amortized cost $ 45,800,000   $ 45,800,000   $ 46,000,000.0
Standard & Poor's, AA- Rating          
Debt Securities, Available-for-Sale [Line Items]          
Amortized cost 3,300,000   3,300,000   3,300,000
Taxable municipals          
Debt Securities, Available-for-Sale [Line Items]          
Amortized cost of debt securities available-for-sale, at fair value 1,006,000   1,006,000   1,006,000
Held-to-maturity debt securities pledged as collateral 555,000   555,000   555,000
Available-for-sale debt securities in a gross unrealized loss position 73,000   73,000   68,000
Unrealized losses in a continual loss position for 12 months or longer 73,000   73,000   68,000
Debt securities available-for-sale, at fair value (amortized cost of $316,289 and $237,191 at June 30, 2026 and December 31, 2025) 934,000   934,000   938,000
Unrecognized losses on held-to-maturity debt securities 73,000   73,000   63,000
Other Bank Stock          
Debt Securities, Available-for-Sale [Line Items]          
Equity securities without readily determinable fair values 819,000   819,000   819,000
Impairment loss from change in fair value of other equity securities 0 0 0 0  
Other Equity Investments          
Debt Securities, Available-for-Sale [Line Items]          
Equity securities without readily determinable fair values 8,300,000   8,300,000   9,100,000
Impairment loss from change in fair value of other equity securities $ 0 0 0 0  
Investment company, committed capital, unfunded     $ 6,700,000    
Ownership percentage in investments 5.00%   5.00%    
Net capital contributions to equity investments $ (882,000) 398,000 $ (792,000) 330,000  
Income recognized (251,000)   (70,000)    
Limited Partnership          
Debt Securities, Available-for-Sale [Line Items]          
Affordable housing projects, aggregate funding commitment 4,300,000   4,300,000   4,800,000
Affordable housing projects, unfunded portion of commitment 295,000   295,000   $ 382,000
Impairment loss from change in fair value of affordable housing project investment 0 $ 0 0 $ 0  
Asset Pledged as Collateral | Deposits          
Debt Securities, Available-for-Sale [Line Items]          
Amortized cost of debt securities available-for-sale, at fair value 85,700,000   85,700,000    
Asset Pledged as Collateral | Federal Reserve Bank Advances          
Debt Securities, Available-for-Sale [Line Items]          
Held-to-maturity debt securities pledged as collateral 52,800,000   52,800,000    
Asset Pledged as Collateral | Letter of Credit          
Debt Securities, Available-for-Sale [Line Items]          
Amortized cost of debt securities available-for-sale, at fair value $ 14,300,000   $ 14,300,000