QUARTERLY FINANCIAL RESULTS (Schedule of Quarterly Financial Results) (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, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
QUARTERLY FINANCIAL RESULTS [Abstract]
Interest income	$ 12,968	$ 12,937	$ 11,449	$ 10,447	$ 10,505	$ 10,236	$ 10,003	$ 9,908	$ 10,047	$ 9,837	$ 9,542	$ 9,445	$ 47,801	$ 40,652	$ 38,871
Net interest income	12,369	12,326	10,900	9,933	9,965	9,658	9,383	9,243	9,293	9,010	8,683	8,539	45,528	38,249	35,525
Provision for credit losses	545	345	974	427	418	605	375	450	475	410	540	650	2,291	1,848	2,075
Income (loss) before income taxes	5,531	5,686	3,906	4,662	4,377	3,843	3,684	3,995	3,506	3,109	2,631	2,270	19,785	15,899	11,516
Net income (loss)	$ 2,698	$ 3,412	$ 2,352	$ 2,800	$ 2,495	$ 2,411	$ 2,272	$ 2,460	$ 2,163	$ 1,909	$ 1,627	$ 1,409	$ 11,262	$ 9,638	$ 7,108
Basic net income per common share (in dollars per share)	$ 0.21	$ 0.27	$ 0.19	$ 0.22	$ 0.20	$ 0.19	$ 0.18	$ 0.19	$ 0.17	$ 0.15	$ 0.13	$ 0.11	$ 0.89	$ 0.76	$ 0.56
Diluted net income per common share (in dollars per share)	0.21	0.27	0.19	0.22	0.20	0.19	0.18	0.19	0.17	0.15	0.13	0.11	0.89	0.76	0.56
Dividends paid per common share (in dollars per share)	$ 0.07	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.03	$ 0.03	$ 0.03	$ 0.02	$ 0.02			$ 0.22	$ 0.14	$ 0.04