DERIVATIVES AND HEDGING ACTIVITIES - Fair Value Hedges Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
DERIVATIVES AND HEDGING ACTIVITIES
Interest income from swap transaction		$ 0
Fair value hedges | Designated as Hedging Instrument
DERIVATIVES AND HEDGING ACTIVITIES
Clearing house related to the fair value derivatives	$ 1,300,000		$ 6,500,000
Fair value hedges | Interest Rate Swaps | Designated as Hedging Instrument
DERIVATIVES AND HEDGING ACTIVITIES
Average fixed interest rate	4.82%
Mortgage loans - Amortized Cost	$ 719,500,000		729,500,000
Last-of-layer in the open hedge relationship	500,000,000.0		500,000,000.0
Basis adjustment associated with the hedge	1,300,000		$ 6,600,000
Interest income from swap transaction	$ 628,000