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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Allowance for Loan Losses (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022
ALLOWANCE FOR LOAN LOSSES [Abstract] |  |  |  |
Accrued interest receivable on AFS debt securities | $ 435 |  | $ 394 |
ACL related to AFS debt securities | 0 |  | 0 |
ACL related to HTM debt securities | 2 | $ 3 | 2 | $ 0
ACL related to HTM debt securities, recovery of provision expense | $ 0 | 0 |  |
Credit loss, reversion period | 2 years |  |  |
ACL related to loans | $ 9,229 | 7,607 | 8,767 | 7,431
Provision expense | 857 | 465 |  |
ACL related to off-balance sheet credit | 586 |  | 692 |
ACL related to off-balance sheet credit with corresponding provision expense | 106 | 24 |  |
LOANS [Abstract] |  |  |  |
Loans held for sale | 0 |  | 0 |
Consumer Loans [Member] |  |  |  |
ALLOWANCE FOR LOAN LOSSES [Abstract] |  |  |  |
ACL related to loans | 2,301 | 2,093 | $ 2,232 | $ 2,028
Provision expense | $ 355 | $ 180 |  |
Loans maturity period | 6 years |  |  |

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