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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, 2015 $ 3,672 $ 40,715 $ 85,790 $ (236) $ (10,181) $ 119,760
Balance (in shares) at Dec. 31, 2015 3,671,751          
Comprehensive income:            
Net income     12,638     12,638
Net other comprehensive income       (1,156)   (1,156)
Stock dividend $ 32 1,542        
Stock dividend     (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          
Comprehensive income:            
Net income     13,025     13,025
Net other comprehensive income       (1,447)   (1,447)
Stock dividend $ 166 8,857        
Stock dividend     (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
Change in other comprehensive income due to change in the federal tax rate     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          
Comprehensive income:            
Change in Accounting policy for equity securities     (1) 1   0
Net income     18,034     18,034
Net other comprehensive income       (524)   (524)
Stock dividend $ 34 2,108        
Stock dividend     (2,142)     0
Stock dividend (in shares) 34,273          
Purchase of treasury stock         (1,175) (1,175)
Restricted stock, executive and Board of Director awards   (364)     116 (248)
Restricted stock vesting   247       247
Cash dividend reinvestment paid from treasury stock   0 (30)   30 0
Cash dividends     (6,116)     (6,116)
Balance at Dec. 31, 2018 $ 3,904 $ 53,099 $ 99,727 $ (3,921) $ (13,580) 139,229
Balance (in shares) at Dec. 31, 2018 3,904,212          
Comprehensive income:            
Change in Accounting policy for equity securities           $ 1