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DERIVATIVES - (Derivative position) (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2020
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Derivatives designated as hedges | Interest rate swaps and caps related to customer deposits and borrowings |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Notional amount, derivative asset |  | $ 300,000
Derivatives unrecognized, termination value | $ 12,700 |
Derivatives designated as hedges | Interest rate swaps related to customer deposits |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Notional amount, derivative asset | 700,000 |
Fair Value, Other Assets | 6,505 |
Derivatives not designated as hedges | Interest rate swaps |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Notional amount, derivative asset | 69,000 |
Fair Value, Other Assets | 55 |
Fair Value, Other Liabilities | $ 55 |

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