QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Selected Quarterly Financial Information [Abstract]
Interest Income	$ 15,374	$ 15,134	$ 16,373	$ 15,109	$ 14,600	$ 14,865	$ 14,666	$ 14,210	$ 61,990	$ 58,341	$ 52,411
Net Interest Income	14,199	14,031	15,262	13,996	13,436	13,716	13,491	13,055	57,488	53,698	48,380
Net Income	$ 3,769	$ 3,467	$ 3,919	$ 3,664	$ 3,407	$ 3,164	$ 2,624	$ 2,979	$ 14,819	$ 12,174	$ 12,446
Earnings Per Share, Basic (in dollars per share)	$ 0.35	$ 0.33	$ 0.37	$ 0.34	$ 0.32	$ 0.30	$ 0.25	$ 0.29	$ 1.39	$ 1.16	$ 1.38
Earnings Per Share, Diluted (in dollars per share)	$ 0.35	$ 0.32	$ 0.36	$ 0.34	$ 0.32	$ 0.30	$ 0.25	$ 0.29	$ 1.38	$ 1.15	$ 1.35
Income recognized from deferred interest and discounts on loans that paid off			$ 1,161