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Earnings per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Earnings per share basic and diluted [Abstract]        
Net income applicable to common stock $ 6,647 $ 5,338 $ 15,110 $ 9,869
Basic earnings per share computation [Abstract]        
Weighted average common shares outstanding (in shares) 3,944,488 3,883,734 3,946,184 3,737,759
Earnings per share - basic (in dollars per share) $ 1.69 $ 1.37 $ 3.83 $ 2.64
Diluted earnings per share computation [Abstract]        
Weighted average common shares outstanding for basic earnings per share (in shares) 3,944,488 3,883,734 3,946,184 3,737,759
Add: Dilutive effects of restricted stock (in shares) 72 1,029 35 514
Weighted average common shares outstanding for dilutive earnings per share (in shares) 3,944,560 3,884,763 3,946,219 3,738,273
Earnings per share - diluted (in dollars per share) $ 1.69 $ 1.37 $ 3.83 $ 2.64
Restricted Stock [Member]        
Antidilutive Securities [Abstract]        
Antidilutive restricted stock excluded from net income per share calculations (in shares) 2,479 6,304 2,401 6,304
Restricted Stock [Member] | Minimum [Member]        
Antidilutive Securities [Abstract]        
Antidilutive stock share price range (in dollars per share) $ 51.14 $ 59.24 $ 51.14 $ 59.24
Restricted Stock [Member] | Maximum [Member]        
Antidilutive Securities [Abstract]        
Antidilutive stock share price range (in dollars per share) $ 62.33 $ 62.93 $ 62.33 $ 62.93