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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
Schedule of basic and diluted earnings per share
(Dollars in thousands, except share data)                  
    2018     2017     2016  
Basic                        
Net income   $ 7,333     $ 6,168     $ 6,090  
                         
Weighted average common shares outstanding     3,614,302       3,621,216       3,624,037  
                         
Basic earnings per common shares   $ 2.03     $ 1.70     $ 1.68  
                         
Diluted                        
Net income   $ 7,333     $ 6,168     $ 6,090  
                         
Weighted average common shares outstanding     3,614,302       3,621,216       3,624,037  
Plus dilutive stock options and restricted stock units     13,825       8,465       5,482  
                         
Weighted average common shares outstanding and potentially dilutive shares     3,628,127       3,629,681       3,629,519  
                         
Diluted earnings per common share   $ 2.02     $ 1.70     $ 1.68