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Earnings per Share (Tables)
3 Months Ended
Mar. 31, 2017
Earnings Per Share [Abstract]  
Schedule of calculations of basic and diluted earnings (loss) per share
    Three Months Ended March 31,  
(dollars in thousands, except per share data)   2017     2016  
Basic earnings per share:                
Net income available to shareholders   $ 2,100     $ 1,998  
Basic earnings per share   $ 0.37     $ 0.35  
Diluted earnings per share:                
Net income available to shareholders   $ 2,100     $ 1,998  
Average shares outstanding     5,615,300       5,654,066  
Effect of dilutive stock options     4,726       0  
Average shares outstanding including dilutive stock options     5,620,026       5,654,066  
Diluted earnings per share   $ 0.37       0.35  
Schedule of outstanding shares of the common stock
    Number of shares  
    March 31,     December 31,     March 31,  
    2017     2016     2016  
Outstanding, beginning of year     5,616,607       5,441,190       5,441,190  
Issuance of stock:                        
4% stock dividend     0       217,155       0  
Purchase of treasury stock     (1,400 )     (41,738 )     (8,635 )
Outstanding, end of year     5,615,207       5,616,607       5,432,555