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Earnings Per Share - Schedule of Basic and Diluted Earnings per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Income (Numerator) [Abstract]        
Net income as reported $ 5,933 $ 4,982 $ 17,173 $ 14,502
Basic EPS: Income available to common shareholders 5,933 4,982 17,173 14,502
Diluted EPS: Income available to common shareholders plus assumed conversions $ 5,933 $ 4,982 $ 17,173 $ 14,502
Shares (Denominator) [Abstract]        
Basic EPS: Income available to common shareholders (in shares) 10,785,528 10,751,630 10,780,277 10,744,155
Effect of dilutive securities: restricted stock (in shares) 69,515 71,086 69,515 71,923
Diluted EPS: Income available to common shareholders plus assumed conversions (in shares) 10,855,043 10,822,716 10,849,792 10,816,078
Per-Share Amount [Abstract]        
Basic EPS: Income available to common shareholders (in dollars per share) $ 0.55 $ 0.46 $ 1.59 $ 1.35
Diluted EPS: Income available to common shareholders plus assumed conversions (in dollars per share) $ 0.55 $ 0.46 $ 1.58 $ 1.34