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DERIVATIVES AND HEDGING ACTIVITIES - Non-designated Hedges (Details) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2022 USD ($) item | Jun. 30, 2021 USD ($) | Jun. 30, 2022 USD ($) item | Jun. 30, 2021 USD ($) | Feb. 28, 2022 USD ($) | Dec. 31, 2021 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |
Number of participation loans purchased | item | 4 |  | 4 |  |  |
Participating mortgage loans, mortgage obligations amount | $ 27,000,000.0 |  | $ 27,000,000.0 |  |  |
Gain (Loss) on fair value hedges recognized in earnings | $ 145,000 | $ (179,000) | $ 297,000 | $ 295,000 |  |
Interest Rate Swap |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |
Notional amount of derivatives |  |  |  |  | $ 300,000,000 |
Interest Rate Swap | Not Designated as Hedging Instrument |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |
Number of interest rate derivatives held | 9 |  | 9 |  |  | 11
Notional amount of derivatives | $ 100,300,000 |  | $ 100,300,000 |  |  | $ 93,900,000
Valley Bank | Not Designated as Hedging Instrument |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |
Number Of Loans Acquired | item | 7 |  | 7 |  |  |
Valley Bank | Interest Rate Swap | Not Designated as Hedging Instrument |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |
Notional amount of derivatives | $ 459,000 |  | $ 459,000 |  |  | $ 482,000
Number Of Loans Acquired | item | 7 |  | 7 |  |  |
Number Of Loans Paid Off | item | 6 |  | 6 |  |  |

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- Definition Number of participation loans purchased during the period. + References No definition available. + Details
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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959 + Details
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- Definition Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 + Details
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