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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Loan Modifications (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2024
Commercial and industrial | Term Extension |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Amortized cost basis | $ 2,300 | $ 25 | $ 2,300
% of Total Class of Financing Receivables | 1.80% | 0.02% | 1.80%
Residential mortgage | Term Extension |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Amortized cost basis |  | $ 38 |
% of Total Class of Financing Receivables |  | 0.03% |
Residential mortgage | Other-Than-Insignificant Payment Delay |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Amortized cost basis | $ 82 |  | $ 151
% of Total Class of Financing Receivables | 0.06% |  | 0.12%
Commercial real estate | Term Extension |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Amortized cost basis |  | $ 5,359 | $ 4,564
% of Total Class of Financing Receivables |  | 0.74% | 0.61%
Other consumer | Other-Than-Insignificant Payment Delay |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Amortized cost basis |  | $ 22 |
% of Total Class of Financing Receivables |  | 0.33% |

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