v3.26.1
LOANS AND ALLOWANCE FOR CREDIT LOSSES ON LOANS (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Proceeds from the sale of mortgage loans     $ 130,525 $ 91,258  
Gain on sale of mortgage loans     (1,518) (1,005)  
Loans held for sale, at fair value (book value of $13,866 and $14,965, respectively) $ 13,890   $ 13,890   $ 15,040
Other industry exposures     0    
Non-Accrual Loans 12,142   $ 12,142   7,023
Loans outstanding 5,004,468   5,004,468   4,965,138
Loans and Leases Receivable, Excluded Accrued Interest from Amortized Cost 15,900   15,900   15,800
FHLB advances, general debt obligations, pledged collateral 2,200,000   2,200,000   2,200,000
Loans And Leases Receivable Impaired Interest Income Foregone 130 $ 183 393 256  
Recoveries 234 128 398 299 535
Residential real estate          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Proceeds from the sale of mortgage loans 68,700 48,400 129,000 90,300  
Gain on sale of mortgage loans (814) (508) (1,500) (1,000)  
Loans held for sale, at fair value (book value of $13,866 and $14,965, respectively) 13,900   13,900   15,000
Unrealized gain (loss) on loans held for sale     24   75
Non-Accrual Loans 2,715   2,715   2,667
Loans outstanding 1,997,226   1,997,226   2,012,922
Mortgage Loans in Process of Foreclosure, Amount 753   753   738
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Period Increase (Decrease) 100 182 (51) 80  
Recoveries 6 5 12 11 25
Commercial real estate - non-owner-occupied          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Non-Accrual Loans 5,474   5,474   429
Loans outstanding 1,778,428   1,778,428   1,778,985
Recoveries 1 1 1 2 9
Commercial          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Non-Accrual Loans 2,871   2,871   3,042
Loans outstanding 431,211   431,211   417,439
Recoveries 220 120 372 230 428
Home equity          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Non-Accrual Loans 501   501   672
Loans outstanding 367,818   367,818   332,256
Recoveries 0 0 0 0 1
Consumer          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Non-Accrual Loans 1   1   3
Loans outstanding 17,111   17,111   17,416
Recoveries $ 7 $ 2 $ 9 $ 5 $ 12
Residential Building Operators Industry Sector | Total Commercial Real Estate Portfolio Segment | Total Loan Portfolio          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Concentration risk (percentage)     27.00%    
Non-Residential Building Operators Industry Sector | Loan Concentration Risk | Total Loan Portfolio          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Concentration risk (percentage)     12.00%    
Non-Residential Building Operators Industry Sector | Total Commercial Real Estate Portfolio Segment | Total Loan Portfolio          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Concentration risk (percentage)     28.00%