DERIVATIVES AND HEDGING ACTIVITIES - Summary of interest-rate swaps designated as cash flow hedges (Details) - Interest Rate Swap - Cash Flow Hedging - Designated as Hedging Instrument - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amounts	$ 274,000,000.0	$ 259,000,000.0
Weighted average pay rates	2.98%	2.91%
Weighted average receive rates	5.14%	5.49%
Weighted average maturity (in years)	2 years 6 months	3 years 2 months 12 days
Gross unrealized gain included in other assets	$ 5,978,000	$ 9,047,000
Gross unrealized loss included in other liabilities	1,975,000	1,465,000
Unrealized gains, net	$ 4,003,000	$ 7,582,000