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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Credit Losses Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2020 | Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Unfunded loan commitments | $ 79,353 | $ 81,030 |  |
(Reversal of) provision for credit losses | (1,107) | 991 | $ 15,761 |
Unfunded Loan Commitment |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Unfunded loan commitments | 3,400 | 3,200 |  |
Commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Unfunded loan commitments | 82,713 | 84,213 | 82,131 | $ 61,713
Net charge-off | 393 |  | 1,726 |
(Reversal of) provision for credit losses | (1,107) |  | $ 15,761 |
Loans receivable |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Accrued interest receivable on loans receivable | $ 23,700 | $ 24,700 |  |

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