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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 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Income (Numerator) [Abstract]        
Net income as reported $ 5,734 $ 4,883 $ 11,240 $ 9,520
Basic EPS: Income available to common shareholders 5,734 4,883 11,240 9,520
Diluted EPS: Income available to common shareholders plus assumed conversions $ 5,734 $ 4,883 $ 11,240 $ 9,520
Shares (Denominator) [Abstract]        
Basic EPS: Income available to common shareholders (in shares) 10,779,275 10,746,363 10,776,680 10,740,355
Effect of dilutive securities: restricted stock (in shares) 70,443 71,086 70,443 72,348
Diluted EPS: Income available to common shareholders plus assumed conversions (in shares) 10,849,718 10,817,449 10,847,123 10,812,703
Per-Share Amount [Abstract]        
Basic EPS: Income available to common shareholders (in dollars per share) $ 0.53 $ 0.45 $ 1.04 $ 0.89
Diluted EPS: Income available to common shareholders plus assumed conversions (in dollars per share) $ 0.53 $ 0.45 $ 1.04 $ 0.88