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DERIVATIVES AND HEDGING ACTIVITIES - Non-designated Hedges (Details) - Interest Rate Swaps - Nondesignated Hedges	3 Months Ended		9 Months Ended
	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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