FAIR VALUE OF FINANCIAL ASSETS AND FINANCIAL LIABILITIES (Narrative) (Details)	12 Months Ended
Dec. 31, 2025 USD ($) security bond	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES
Loans, weighted average discount rate, percent	6.33%	7.07%
Time deposits, weighted average discount rate, percent	3.81%	4.50%
Long -term debt, weighted average discount rate, percent	6.12%	6.68%
Transfers of financial assets (liability) out of Level 3	$ 0
Transfers of financial assets (liability) into Level 3	$ 0
Mortgage revenue bonds
FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES
Number of investment securities held \| bond	2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 6,716,000	$ 6,847,000	$ 7,150,000
Mortgage revenue bonds \| Weighted average \| Weighted-average discount rate
FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES
Debt Instrument, Measurement Input	0.0592	0.0622
Mortgage revenue bonds \| States and political subdivisions
FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 6,048,000	$ 6,165,000	6,436,000
Mortgage revenue bonds \| Residential - Non-Government Agencies
FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES
Number of investment securities held \| security	2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 668,000	$ 682,000	$ 714,000

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Time Deposits, Weighted Average Discount Rate, Percent

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of transfers of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) into level 3 of the fair value hierarchy.

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Amount of transfers of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset) out of level 3 of the fair value hierarchy.

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- Definition

Weighted average discount rate for finance lease calculated at point in time.

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Weighted average interest rate of long-term debt outstanding calculated at point in time.

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