INVESTMENT SECURITIES (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Investment securities available-for-sale [Abstract]
Amortized cost	$ 352,451,000		$ 352,451,000		$ 340,706,000
Unrealized gains	10,978,000		10,978,000		3,131,000
Unrealized losses	(60,000)		(60,000)		(940,000)
Estimated fair value	363,369,000		363,369,000		342,897,000
Proceeds from sales, calls and maturities of available-for-sale securities	15,487,000	$ 10,974,000	47,531,000	$ 43,657,000
Gross realized gains from sales/calls of available-for-sale securities	254,000	0	342,000	47,000
Gross realized losses from sales/calls of available-for-sale securities	0	$ 0	(46,000)	$ (53,000)
U.S. Treasury Securities [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	29,738,000		29,738,000		42,667,000
Unrealized gains	1,135,000		1,135,000		601,000
Unrealized losses	0		0		(13,000)
Estimated fair value	30,873,000		30,873,000		43,255,000
Securities of U.S. Government Agencies and Corporations [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	77,912,000		77,912,000		53,525,000
Unrealized gains	1,353,000		1,353,000		433,000
Unrealized losses	(20,000)		(20,000)		(46,000)
Estimated fair value	79,245,000		79,245,000		53,912,000
Obligations of States and Political Subdivisions [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	30,619,000		30,619,000		26,311,000
Unrealized gains	1,639,000		1,639,000		749,000
Unrealized losses	(17,000)		(17,000)		(29,000)
Estimated fair value	32,241,000		32,241,000		27,031,000
Collateralized Mortgage Obligations [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	76,359,000		76,359,000		79,470,000
Unrealized gains	2,158,000		2,158,000		349,000
Unrealized losses	0		0		(399,000)
Estimated fair value	78,517,000		78,517,000		79,420,000
Mortgage-backed Securities [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	137,823,000		137,823,000		138,733,000
Unrealized gains	4,693,000		4,693,000		999,000
Unrealized losses	(23,000)		(23,000)		(453,000)
Estimated fair value	$ 142,493,000		$ 142,493,000		$ 139,279,000