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Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($)
$ in Thousands
Total
Common Stock [Member]
Common Stock [Member]
Employee Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Treasury Stock [Member]
Balance (in shares) at Dec. 31, 2014   3,316,658          
Balance at Dec. 31, 2014 $ 86,354 $ 2,176   $ 14,819 $ 70,928 $ 907 $ (2,476)
Net income 6,290       6,290    
Other comprehensive income, net of tax 353         353  
Cash dividends declared ($0.90 per share) (2,901)       (2,901)    
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)   23,796 1,721        
Stock issued in connection with dividend reinvestment and stock purchase plan 667 $ 15   652      
Stock issued for employee stock purchase plan $ 43 $ 1   42      
Stock issued for options exercised (in shares) 12,150 8,302          
Stock issued for options exercised $ 106 $ 5   101      
Tax benefit of stock options exercised 20     20      
Stock-based compensation expense 64     64      
Balance (in shares) at Sep. 30, 2015   3,350,477          
Balance at Sep. 30, 2015 $ 90,996 $ 2,197   15,698 74,317 1,260 (2,476)
Balance (in shares) at Dec. 31, 2015 3,359,794 3,359,794          
Balance at Dec. 31, 2015 $ 90,443 $ 2,203   15,973 75,289 (546) (2,476)
Net income 6,655       6,655    
Other comprehensive income, net of tax 2,834         2,834  
Cash dividends declared ($0.90 per share) (3,045)       (3,045)    
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)   24,886 1,540        
Stock issued in connection with dividend reinvestment and stock purchase plan 753 $ 15   738      
Stock issued for employee stock purchase plan $ 41 $ 1   40      
Stock issued for options exercised (in shares) 18,425 13,868          
Stock issued for options exercised $ 243 $ 9   234      
Tax benefit of stock options exercised 12     12      
Stock-based compensation expense $ 60     60      
Balance (in shares) at Sep. 30, 2016 3,400,088 3,400,088          
Balance at Sep. 30, 2016 $ 97,996 $ 2,228   $ 17,057 $ 78,899 $ 2,288 $ (2,476)