DERIVATIVES AND HEDGING ACTIVITIES - Derivatives not designated as hedges, effect on statement of operations (Details) - Derivatives not designated as hedging instruments: - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss), Net, Recognized in Income on Derivatives for Years Ended December 31,	$ (939)	$ (76)	$ 40
Derivatives - interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss), Net, Recognized in Income on Derivatives for Years Ended December 31,	(844)	6	(118)
Risk participation agreements
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss), Net, Recognized in Income on Derivatives for Years Ended December 31,	$ (95)	$ (82)	$ 158