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Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Earnings Per Share [Abstract]        
Distributed earnings allocated to common shares $ 295 $ 246 $ 862 $ 713
Undistributed earnings allocated to common shares 2,005 1,773 4,868 4,322
Net earnings allocated to common shares 2,300 2,019 5,730 5,035
Net earnings allocated to participating securities 3 1 6 4
Dividends on convertible preferred shares 244 244 731 712
Net Income allocated to common shares and participating securities $ 2,547 $ 2,264 $ 6,467 $ 5,751
Weighted average shares outstanding for basic earnings per share 4,874 4,884 4,888 4,882
Dilutive effect of stock compensation 47 55 41 89
Dilutive effect of convertible shares 1,455 1,451 1,455 1,451
Weighted average shares outstanding for diluted earnings per share 6,376 6,390 6,384 6,422
Basic earnings per common share $ 0.47 $ 0.41 $ 1.17 $ 1.03
Diluted earnings per common share $ 0.4 $ 0.35 $ 1.01 $ 0.89