INVESTMENT SECURITIES, Analysis of Gross Unrealized Losses (Details)	Mar. 31, 2021 USD ($) Security	Dec. 31, 2020 USD ($)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 203,669,000	$ 95,948,000
12 months or more, fair value	0	0
Total fair value	203,669,000	95,948,000
Less than 12 months, unrealized losses	(4,200,000)	(374,000)
12 Months or more, unrealized losses	0	0
Total unrealized losses	$ (4,200,000)	(374,000)
Investment securities in an unrealized loss position less than 12 months | Security	93
Investment securities in an unrealized loss position more than 12 months | Security	0
Investment securities pledged as collateral	$ 40,372,000	41,916,000
U.S. Treasury Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	19,774,000	4,276,000
12 months or more, fair value	0	0
Total fair value	19,774,000	4,276,000
Less than 12 months, unrealized losses	(155,000)	(1,000)
12 Months or more, unrealized losses	0	0
Total unrealized losses	(155,000)	(1,000)
Securities of U.S. Government Agencies and Corporations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	71,221,000	58,164,000
12 months or more, fair value	0	0
Total fair value	71,221,000	58,164,000
Less than 12 months, unrealized losses	(2,129,000)	(265,000)
12 Months or more, unrealized losses	0	0
Total unrealized losses	(2,129,000)	(265,000)
Obligations of States and Political Subdivisions [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	8,336,000	1,603,000
12 months or more, fair value	0	0
Total fair value	8,336,000	1,603,000
Less than 12 months, unrealized losses	(207,000)	(9,000)
12 Months or more, unrealized losses	0	0
Total unrealized losses	(207,000)	(9,000)
Collateralized Mortgage Obligations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	11,024,000	1,697,000
12 months or more, fair value	0	0
Total fair value	11,024,000	1,697,000
Less than 12 months, unrealized losses	(219,000)	(8,000)
12 Months or more, unrealized losses	0	0
Total unrealized losses	(219,000)	(8,000)
Mortgage-backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	93,314,000	30,208,000
12 months or more, fair value	0	0
Total fair value	93,314,000	30,208,000
Less than 12 months, unrealized losses	(1,490,000)	(91,000)
12 Months or more, unrealized losses	0	0
Total unrealized losses	$ (1,490,000)	$ (91,000)