Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings per share basic and diluted [Abstract]
Net income applicable to common stock	$ 7,064	$ 8,007	$ 22,174	$ 17,876
Basic earnings per share computation [Abstract]
Weighted average common shares outstanding (in shares)	3,949,508	3,956,997	3,945,962	3,808,264
Earnings per share - basic (in dollars per share)	$ 1.79	$ 2.02	$ 5.62	$ 4.69
Diluted earnings per share computation [Abstract]
Weighted average common shares outstanding for basic earnings per share (in shares)	3,949,508	3,956,997	3,945,962	3,808,264
Add: Dilutive effects of restricted stock (in shares)	95	0	7	2,025
Weighted average common shares outstanding for dilutive earnings per share (in shares)	3,949,603	3,956,997	3,945,969	3,810,289
Earnings per share - diluted (in dollars per share)	$ 1.79	$ 2.02	$ 5.62	$ 4.69
Restricted Stock [Member]
Antidilutive Securities [Abstract]
Antidilutive restricted stock excluded from net income per share calculations (in shares)	4,977	9,480	6,000	5,347
Restricted Stock [Member] | Minimum [Member]
Antidilutive Securities [Abstract]
Antidilutive stock share price range (in dollars per share)	$ 57.39	$ 51.14	$ 51.14	$ 58.37
Restricted Stock [Member] | Maximum [Member]
Antidilutive Securities [Abstract]
Antidilutive stock share price range (in dollars per share)	$ 63.19	$ 62.93	$ 63.19	$ 62.93