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EARNINGS PER SHARE (Tables)
12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Computation of earnings per share
  Years ended December 31, (in thousands, except per share amounts)    2017      2016      2015  
Net income  $6,256   $6,685   $8,457 
Less: Preferred stock dividends declared           (158)
Net income applicable to common shareholders   6,256    6,685    8,299 
Less: Undistributed earnings allocated to participating securities   (55)   (52)   (72)
Net income allocated to common stock  $6,201   $6,633   $8,227 
Weighted average common shares issued   2,779    2,755    2,730 
Less: Unvested restricted stock awards   (24)   (22)   (24)
Weighted average common shares outstanding used to calculate basic earnings per common share   2,755    2,733    2,706 
Add: Dilutive effect of stock options   19    16    17 
Weighted average common shares outstanding used to calculate diluted earnings per common share   2,774    2,749    2,723 
Earnings per common share (basic)  $2.25   $2.43   $3.04 
Earnings per common share (diluted)  $2.24   $2.41   $3.02