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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2023 USD ($) | Jun. 30, 2023 USD ($) qtr | Dec. 31, 2022 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Valuation period | qtr |  | 7 |
Forecasting revision period |  | 1 year |
Commercial loans |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing receivable, reclassification, held for sale | $ 0.0 |  | $ 0.0
Commercial and industrial |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing receivable, nonaccrual, medallion loans, fair value | 0.4 | $ 0.4 | 0.6
Financing receivable, nonaccrual, medallion loans, contractual balance | $ 9.3 | $ 9.3 | $ 10.9

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