DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Cumulative basis adjustment for fair value hedges (Details) - Designated as hedging instruments - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES
Closed Portfolio Amount	$ 85,070	$ 86,770
Cumulative amount of fair value hedging adjustment included in the carrying amount of assets	(295)	(1,637)
Available-for-sale - Municipals
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES
Closed Portfolio Amount	50,809	50,964
Cumulative amount of fair value hedging adjustment included in the carrying amount of assets	(222)	(1,230)
Available-for-sale - MBS
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES
Closed Portfolio Amount	34,261	35,806
Cumulative amount of fair value hedging adjustment included in the carrying amount of assets	(73)	(407)
Interest rate swaps
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES
Interest rate swaps notional amount	$ 50,000	$ 50,000