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Consolidated Statement of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Treasury Stock [Member]
Total
Balance at Dec. 31, 2014 $ 3,335 $ 25,150 $ 79,512 $ 767 $ (8,236) $ 100,528
Balance (in shares) at Dec. 31, 2014 3,335,236          
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income     11,626     11,626
Net other comprehensive income       (1,003)   (1,003)
Stock issued for acquisition $ 337 15,647 0     15,984
Stock issued for acquisition (in shares) 336,515          
Purchase of treasury stock         (2,455) (2,455)
Restricted stock, executive and Board of Director awards   (256)     308 52
Restricted stock vesting   179       179
Forfeited restricted stock   7     (7) 0
Cash dividend reinvestment paid from treasury stock   (12) (197)   209 0
Cash dividends     (5,151)     (5,151)
Balance at Dec. 31, 2015 $ 3,672 40,715 85,790 (236) (10,181) 119,760
Balance (in shares) at Dec. 31, 2015 3,671,751          
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income     12,638     12,638
Net other comprehensive income       (1,156)   (1,156)
Stock dividend $ 32 1,542 (1,574)     0
Stock dividend (in shares) 32,624          
Purchase of treasury stock         (3,227) (3,227)
Restricted stock, executive and Board of Director awards   (197)     288 91
Restricted stock vesting   184       184
Sale of treasury stock   (1)     60 59
Forfeited restricted stock   4     (4) 0
Cash dividend reinvestment paid from treasury stock   3 (495)   492 0
Cash dividends     (5,081)     (5,081)
Balance at Dec. 31, 2016 $ 3,704 42,250 91,278 (1,392) (12,572) 123,268
Balance (in shares) at Dec. 31, 2016 3,704,375          
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income     13,025     13,025
Net other comprehensive income       (1,447)   (1,447)
Stock dividend $ 166 8,857 (9,023)     0
Stock dividend (in shares) 165,564          
Purchase of treasury stock         (979) (979)
Restricted stock, executive and Board of Director awards   (224)     296 72
Restricted stock vesting   206       206
Sale of treasury stock   0     43 43
Forfeited restricted stock   2     (2) 0
Reclassification of certain income tax effects from accumulated other comprehensive income     559 (559)   0
Cash dividend reinvestment paid from treasury stock   17 (680)   663 0
Cash dividends     (5,177)     (5,177)
Balance at Dec. 31, 2017 $ 3,870 $ 51,108 $ 89,982 $ (3,398) $ (12,551) $ 129,011
Balance (in shares) at Dec. 31, 2017 3,869,939