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Earnings per Share (Tables)
6 Months Ended
Jun. 30, 2017
Earnings per common share:  
Earnings per share (in thousands, except per share amounts)

  Three Months ended   Six Months ended
  June 30,   June 30,
  2017   2016   2017   2016
Weighted average common shares              
 outstanding during the period              
 - shares used for basic              
 earnings per common share   9,965       9,864       9,948       9,858  
                               
Common shares issuable under                              
 share based payment plans                              
 which are potentially dilutive   73       43       71       42  
                               
Common shares used for diluted                              
 earnings per common share   10,038       9,907       10,019       9,900  
                               
Net income $ 1,713       774       3,156       2,594  
                               
Basic earnings per common share:                              
 Basic $ 0.17       0.08       0.32       0.26  
 Diluted $ 0.17       0.08       0.32       0.26