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FAIR VALUE OF ASSETS AND LIABILITIES (Narrative) (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2023
USD ($)
security
Jun. 30, 2023
USD ($)
security
Dec. 31, 2022
USD ($)
Jun. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Loans, weighted average discount rate, percent 7.76% 7.76%      
Time deposits, weighted average discount rate, percent 5.60% 5.60%      
Long -term debt, weighted average discount rate, percent 7.04% 7.04%      
Transfers of financial assets (liability) out of Level 3 $ 0 $ 0      
Mortgage revenue bonds          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value $ 14,299,000 $ 14,299,000 $ 13,254,000 $ 10,504,000 $ 8,619,000
Mortgage revenue bonds | States and political subdivisions          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Number of investment securities held | security 2 2      
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value $ 7,599,000 $ 7,599,000 6,584,000 6,998,000 7,681,000
Mortgage revenue bonds | Residential - Non-government agencies          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Number of investment securities held | security 2 2      
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value $ 714,000 $ 714,000 $ 684,000 $ 782,000 $ 938,000
Weighted average | Weighted-average discount rate | Interest rate swap agreements | Derivatives Not in Cash Flow Hedging Relationship | Designated as Hedging Instrument          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Derivative, measurement input 0.0351 0.0351 0.0331    
Weighted average | Mortgage revenue bonds | Weighted-average discount rate          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]          
Weighted average prepayment speed assumption 0.0615 0.0615 0.0641