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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Net loans | $ 7,847,468 |  | $ 7,847,468 |  | $ 6,719,753
Commercial loans |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Financing receivable, reclassification, held for sale | 3,600 | $ 0 | 3,600 | $ 11,700 |
Commercial and industrial |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Financing receivable, nonaccrual, medallion loans, fair value | 800 |  | 800 |  | 1,200
Financing receivable, nonaccrual, medallion loans, contractual balance | 13,400 |  | 13,400 |  | 31,400
Small Business Administration (SBA), CARES Act, Paycheck Protection Program |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Net loans | $ 10,300 |  | $ 10,300 |  | $ 29,900

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