OTHER REAL ESTATE OWNED ("OREO") (Narrative) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Debt and Equity Securities, FV-NI [Line Items]
Additions of underlying property	$ 0	$ 0	$ 1,240,000
Losses (gains) on dispositions	(22,000)	3,000
Disposals of underlying property	(600,000)	(703,000)	(2,882,000)
Impaired loans secured by residential real estate	0		$ 0
Residential Lots
Debt and Equity Securities, FV-NI [Line Items]
Losses (gains) on dispositions	22,000
Disposals of underlying property	$ (600,000)
Commercial real estate
Debt and Equity Securities, FV-NI [Line Items]
Losses (gains) on dispositions		3,000
Disposals of underlying property		(700,000)
Proceeds from sale of OREO		$ 700,000