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DERIVATIVES - Cash flow hedge accounting (Details) - Derivatives designated as hedging instruments - Interest rate caps related to customer deposits - Cash flow hedge - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Amount of gain (loss) recognized in OCI, net of tax | $ 4,695 | $ 1,677 | $ 4,007 | $ 7,764
Amount of gain (loss) reclassified from OCI into income | $ 1,218 |  | $ 2,453 |
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration] | Licensing Fees |  | Licensing Fees |

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