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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, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Income (Numerator) [Abstract]        
Net income as reported $ 4,982 $ 4,562 $ 14,502 $ 13,689
Basic EPS: Income available to common shareholders 4,982 4,562 14,502 13,689
Diluted EPS: Income available to common shareholders plus assumed conversions $ 4,982 $ 4,562 $ 14,502 $ 13,689
Shares (Denominator) [Abstract]        
Basic EPS: Income available to common shareholders (in shares) 10,751,630 10,718,873 10,744,155 10,709,901
Effect of dilutive securities: restricted stock (in shares) 71,086 125,495 71,923 110,492
Diluted EPS: Income available to common shareholders plus assumed conversions (in shares) 10,822,716 10,844,368 10,816,078 10,820,393
Per-Share Amount [Abstract]        
Basic EPS: Income available to common shareholders (in dollars per share) $ 0.46 $ 0.43 $ 1.35 $ 1.28
Diluted EPS: Income available to common shareholders plus assumed conversions (in dollars per share) $ 0.46 $ 0.42 $ 1.34 $ 1.27