Quarterly report [Sections 13 or 15(d)]

FAIR VALUE MEASUREMENTS (Schedule of Financial Instruments with Estimated Fair Values) (Details)

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FAIR VALUE MEASUREMENTS (Schedule of Financial Instruments with Estimated Fair Values) (Details) - USD ($)
Sep. 30, 2026
Dec. 31, 2025
ASSETS:    
Loans, Net of Allowance for Credit Losses $ 2,459,355,000 $ 2,515,117,000
Fair value inputs, Level 1 [Member]    
ASSETS:    
Cash 71,617,000 62,189,000
Fed Funds Sold and Interest Bearing Deposits 340,015,000 467,782,000
Investment Securities, Held to Maturity 0 129,268,000
Other Equity Securities   0
Mortgage Servicing Rights 0 0
Loans, Net of Allowance for Credit Losses 0 0
LIABILITIES:    
Deposits 0 0
Short-Term Borrowings 0 0
Subordinated Notes Payable 0 0
Long-Term Borrowings 0 0
Fair Value, Inputs, Level 2 [Member]    
ASSETS:    
Cash 0 0
Fed Funds Sold and Interest Bearing Deposits 0 0
Investment Securities, Held to Maturity 293,832,000 240,052,000
Other Equity Securities   2,848,000
Mortgage Servicing Rights 0 0
Loans, Net of Allowance for Credit Losses 0 0
LIABILITIES:    
Deposits 3,665,513,000 3,662,466,000
Short-Term Borrowings 38,881,000 50,092,000
Subordinated Notes Payable 31,339,000 40,116,000
Long-Term Borrowings 567,000 680,000
Fair Value, Inputs, Level 3 [Member]    
ASSETS:    
Cash 0 0
Fed Funds Sold and Interest Bearing Deposits 0 0
Investment Securities, Held to Maturity 0 0
Other Equity Securities   0
Mortgage Servicing Rights 1,534,000 1,359,000
Loans, Net of Allowance for Credit Losses 2,321,370,000 2,416,937,000
LIABILITIES:    
Deposits 0 0
Short-Term Borrowings 0 0
Subordinated Notes Payable 0 0
Long-Term Borrowings 0 0
Carrying (Reported) Amount, Fair Value Disclosure [Member]    
ASSETS:    
Cash 71,617,000 62,189,000
Fed Funds Sold and Interest Bearing Deposits 340,015,000 467,782,000
Investment Securities, Held to Maturity 315,142,000 377,446,000
Other Equity Securities   2,848,000
Mortgage Servicing Rights 908,000 924,000
Loans, Net of Allowance for Credit Losses 2,459,355,000 2,515,117,000
LIABILITIES:    
Deposits 3,666,568,000 3,662,312,000
Short-Term Borrowings 38,881,000 50,092,000
Subordinated Notes Payable 33,303,000 42,582,000
Long-Term Borrowings $ 567,000 $ 680,000