DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Derivative [Line Items]
Interest expense	$ 2,022,000	$ 4,683,000
Unrealized loss to be reclassified as a reduction of interest expense	0
Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Swap
Derivative [Line Items]
Notional amount	5,000,000		$ 5,000,000
Interest expense	155,000	$ 137,000
Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Swap | FHLB Advances
Derivative [Line Items]
Notional amount	$ 40,000,000		$ 40,000,000