Earnings Per Share - Components of Earnings Per Share Calculations (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Shares [Abstract]
Basic earnings per share (in shares)	3,794,725	3,784,934	3,792,700	3,782,943
Effect of dilutive stock awards (in shares)	6,554	5,912	6,544	8,320
Diluted earnings per share (in shares)	3,801,279	3,790,846	3,799,244	3,791,263
Per Share Amount [Abstract]
Basic earnings per share (in dollars per share)	$ 0.41	$ 0.54	$ 1.19	$ 1.39
Diluted earnings per share (in dollars per share)	$ 0.41	$ 0.54	$ 1.19	$ 1.38