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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Schedule of Net Gains (Losses) Relating to Free-Standing Derivative Instruments (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Other noninterest income | Interest rate contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivative instruments, net, pretax, total | $ 143 | $ (326)
Other noninterest income | Risk participation agreement |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivative instruments, net, pretax, total | 33 | 0
Mortgage banking activity | Interest Rate Lock Commitments |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivative instruments, net, pretax, total | 2,116 | 5,013
Mortgage banking activity | Mortgage derivatives - forward contracts related to mortgage loans held for sale |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivative instruments, net, pretax, total | $ 4,760 | $ (7,876)

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