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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 | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Interest rate contracts | Other noninterest income |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) on derivative instruments, net, pretax, total | $ (48) | $ (337) | $ (291) | $ (150)
Risk participation agreement | Other noninterest income |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) on derivative instruments, net, pretax, total | 6 | (24) | (7) | 17
Interest rate lock commitments | Mortgage banking activity |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) on derivative instruments, net, pretax, total | (1,193) | 257 | 3,508 | 1,425
Forward contracts related to mortgage loans held for sale | Mortgage banking activity |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) on derivative instruments, net, pretax, total | $ 5,255 | $ (2,434) | $ (7,775) | $ 3,808

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