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PORTFOLIO LOANS - Schedule of loans modified under the CARES Act or Interagency Statement (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($) contract | Dec. 31, 2021 USD ($) contract | Dec. 31, 2020 contract
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | 4 |  | 8
Total COVID-19 loans modifications |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | 9 | 34 |
Recorded Investment1 | $ | $ 20,655 | $ 128,867 |
Commercial loans: Interest-only deferrals |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | 3 | 1 | 3
Commercial loans: Interest-only deferrals | Interest-only deferrals |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | 8 | 32 |
Recorded Investment1 | $ | $ 20,556 | $ 128,730 |
Retail loans: Mortgage and personal loan deferrals | Mortgage and personal loan deferrals |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number of Contracts | 1 | 2 |
Recorded Investment1 | $ | $ 99 | $ 137 |

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