Earnings Per Share - Components of Earnings Per Share Calculations (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Shares [Abstract]
Basic earnings per share (in shares)	3,794,725	3,784,934	3,791,676	3,781,931
Effect of dilutive stock awards (in shares)	6,840	9,032	6,539	9,524
Diluted earnings per share (in shares)	3,801,565	3,793,966	3,798,215	3,791,455
Per Share Amount [Abstract]
Basic earnings per share (in dollars per share)	$ 0.42	$ 0.41	$ 0.78	$ 0.84
Diluted earnings per share (in dollars per share)	$ 0.42	$ 0.41	$ 0.78	$ 0.84