DERIVATIVES - Summary of interest-rate swaps designated as cash flow hedges (Details) - Interest Rate Swap - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amounts	$ 109,000,000.0
Other Assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized losses	1,300,000	$ 79,000
Other Liabilities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized losses	1,500,000	5,600,000
Cash Flow Hedging | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amounts	$ 109,000,000	$ 109,000,000.0
Weighted average pay rates	1.46%	1.46%
Weighted average receive rates	0.17%	0.23%
Weighted average maturity (in years)	5 years 3 months 18 days	6 years 2 months 12 days
Unrealized losses	$ (246,000)	$ (5,545,000)