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Net Income per Common Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Earnings Per Share [Abstract]        
Net income $ 2,492 $ 2,021 $ 4,263 $ 3,790
Weighted average shares issued 16,875,190 16,870,113 16,875,134 16,870,113
Add: dilutive effect of stock options (in shares) 19,037 5,226 16,650 4,147
Weighted average shares outstanding adjusted for potential dilution 16,894,227 16,875,339 16,891,784 16,874,260
Basic earnings per share (in dollars per share) $ 0.15 $ 0.12 $ 0.25 $ 0.22
Diluted earnings per share (in dollars per share) $ 0.15 $ 0.12 $ 0.25 $ 0.22
Anti-dilutive shares excluded from earnings per share calculation (in shares) 34,000 21,000 34,000 21,000