CONSOLIDATED CONDENSED QUARTERLY DATA (UNAUDITED) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
CONSOLIDATED CONDENSED QUARTERLY DATA (UNAUDITED) [Abstract]
Interest income	$ 18,411,000	$ 18,386,000	$ 18,160,000	$ 15,339,000	$ 15,587,000	$ 15,874,000	$ 15,502,000	$ 15,017,000	$ 70,296,000	$ 61,980,000	$ 56,758,000
Interest expense	1,866,000	1,916,000	1,874,000	2,449,000	2,797,000	2,975,000	3,166,000	3,102,000	8,105,000	12,040,000	9,574,000
NET INTEREST INCOME	16,545,000	16,470,000	16,286,000	12,890,000	12,790,000	12,899,000	12,336,000	11,915,000	62,191,000	49,940,000	47,184,000
Provision for loan losses	900,000	550,000	550,000	400,000	525,000	400,000	350,000	400,000	2,400,000	1,675,000	1,925,000
Non-interest income	3,726,000	3,386,000	1,941,000	2,105,000	2,083,000	2,140,000	1,997,000	2,022,000
Investment securities gains, net	238,000	152,000	128,000	(254,000)	66,000	37,000	30,000	11,000
Non-interest expenses	10,821,000	9,692,000	11,413,000	8,921,000	8,368,000	8,414,000	8,237,000	8,322,000	40,847,000	33,341,000	31,557,000
Income before provision for income taxes	8,788,000	9,766,000	6,392,000	5,420,000	6,046,000	6,262,000	5,776,000	5,226,000	30,366,000	23,310,000	21,437,000
Provision for income taxes	1,561,000	1,759,000	1,054,000	889,000	1,003,000	1,066,000	930,000	821,000	5,263,000	3,820,000	3,403,000
NET INCOME	$ 7,227,000	$ 8,007,000	$ 5,338,000	$ 4,531,000	$ 5,043,000	$ 5,196,000	$ 4,846,000	$ 4,405,000	$ 25,103,000	$ 19,490,000	$ 18,034,000
Earnings Per Share Basic (in dollars per share)	$ 1.85	$ 2.04	$ 1.39	$ 1.27	$ 1.42	$ 1.46	$ 1.36	$ 1.24	$ 6.60	$ 5.48	$ 5.04
Earnings Per Share Diluted (in dollars per share)	$ 1.85	$ 2.04	$ 1.39	$ 1.27	$ 1.42	$ 1.46	$ 1.36	$ 1.24	$ 6.59	$ 5.47	$ 5.04