EARNINGS PER SHARE (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
Earnings Per Share [Abstract]
Net income	$ 3,617	$ 3,106	$ 3,003	$ 3,246	$ 3,654	$ 2,896	$ 2,968	$ 2,964	$ 12,972	$ 12,482	$ 11,474
Less allocation of earnings and dividends to participating securities									7	13	0
Net income allocated to common shareholders									$ 12,965	$ 12,469	$ 11,474
Weighted average common shares outstanding, gross (in shares)									10,011,358	9,958,300	9,704,965
Less average participating securities (in shares)									5,783	10,243	0
Weighted average number of shares outstanding used in the calculation of basic earnings per common share (in shares)									10,005,575	9,948,057	9,704,965
Add dilutive effect of:
Stock options (in shares)									6,936	10,765	17,174
Stock warrants (in shares)									0	17,548	89,328
Adjusted weighted average number of shares outstanding used in the calculation of diluted earnings per common share (in shares)									10,012,511	9,976,370	9,811,467
Earnings per common share:
Basic (in dollars per share)	$ 0.37	$ 0.31	$ 0.30	$ 0.32	$ 0.37	$ 0.29	$ 0.30	$ 0.30	$ 1.30	$ 1.26	$ 1.18
Diluted (in dollars per share)	$ 0.36	$ 0.31	$ 0.30	$ 0.32	0.37	$ 0.29	$ 0.29	$ 0.30	$ 1.29	$ 1.25	$ 1.17
Stock Compensation Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)									0	0	12,962
Weighted-average price per share of common stock excluded from computation of earnings per share (in dollars per share)					$ 18.41					$ 18.41