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Shareholders' Equity - Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Equity [Abstract]      
Net income $ 15,182 $ 10,964 $ 5,294
Income available to common shareholders $ 15,182 $ 10,964 $ 5,294
Weighted average shares outstanding 11,331,166 10,931,927 10,919,235
Net income per common share (in dollars per share) $ 1.34 $ 1.00 $ 0.48
Effect of dilutive stock options and warrants 104,283 83,836 80,703
Weighted average shares of common stock and common stock equivalents 11,435,449 11,015,763 10,999,938
Net income per diluted common share (in dollars per share) $ 1.33 $ 1.00 $ 0.48
Antidilutive options and warrants excluded from computation of earnings per share 0 26,704 170,585