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DERIVATIVES AND HEDGING ACTIVITIES - Non-designated Hedges (Details) - Interest Rate Swaps - Nondesignated Hedges | 3 Months Ended | 9 Months Ended |
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Sep. 30, 2022 USD ($) item | Sep. 30, 2021 USD ($) | Sep. 30, 2022 USD ($) item | Sep. 30, 2021 USD ($) | Dec. 31, 2021 USD ($)
DERIVATIVES AND HEDGING ACTIVITIES |  |  |  |  |
Number of participation loans purchased | item | 1 |  | 1 |  |
Participating mortgage loans, mortgage obligations amount | $ 8,900,000 |  | $ 8,900,000 |  |
Gain (Loss) on fair value hedges recognized in earnings | $ 88,000 | $ 45,000 | $ 385,000 | $ 340,000 |
Commercial customers |  |  |  |  |
DERIVATIVES AND HEDGING ACTIVITIES |  |  |  |  |
Number of interest rate derivatives held | 7 |  | 7 |  | 11
Notional amount of derivatives | $ 104,600,000 |  | $ 104,600,000 |  |
Third Party Customers |  |  |  |  |
DERIVATIVES AND HEDGING ACTIVITIES |  |  |  |  |
Number of interest rate derivatives held | 7 |  | 7 |  | 11
Notional amount of derivatives | $ 104,600,000 |  | $ 104,600,000 |  | $ 93,900,000
Valley Bank |  |  |  |  |
DERIVATIVES AND HEDGING ACTIVITIES |  |  |  |  |
Notional amount of derivatives |  |  |  |  | $ 482,000
Number Of Loans Acquired | item | 7 |  | 7 |  |

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