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Shareholders' Equity - Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Equity [Abstract]      
Net income $ 21,443 $ 21,289 $ 14,026
Income available to common shareholders $ 21,443 $ 21,289 $ 14,026
Weighted average shares outstanding 13,415,118 13,699,823  
Net income per common share (in dollars per share) $ 1.60 $ 1.55 $ 1.12
Effect of dilutive stock options and warrants 98,489 125,185  
Weighted average shares of common stock and common stock equivalents 13,513,607 13,825,008  
Net income per diluted common share (in dollars per share) $ 1.59 $ 1.54 $ 1.10
Antidilutive options and warrants excluded from computation of earnings per share 0 0