Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended												12 Months Ended
		Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020		Sep. 30, 2020		Jun. 30, 2020		Mar. 31, 2020		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator [Abstract]
Net income		$ 5,686	$ 6,264	$ 6,105	$ 5,104	$ 4,739		$ 4,440		$ 5,036		$ 5,051		$ 23,159	$ 19,266	$ 8,225
Denominator [Abstract]
Weighted-average shares outstanding for basic earnings per share (in shares)														9,056,117	9,378,769	10,145,032
Dilutive effect of stock compensation (in shares)	[1]													35,419	385	2,279
Denominator for diluted earnings per share (in shares)														9,091,536	9,379,154	10,147,311
Earnings per common share [Abstract]
Basic (in dollars per share)		$ 0.64	$ 0.69	$ 0.67	$ 0.56	$ 0.52	[2]	$ 0.48	[2]	$ 0.54	[2]	$ 0.51	[2]	$ 2.56	$ 2.05	$ 0.81
Diluted (in dollars per share)		$ 0.63	$ 0.69	$ 0.67	$ 0.56	$ 0.52	[2]	$ 0.48	[2]	$ 0.54	[2]	$ 0.51	[2]	$ 2.55	$ 2.05	$ 0.81
Nonqualified Stock Options [Member]
Antidilutive securities [Abstract]
Antidilutive shares excluded from the calculation of earnings per share (in shares)														264,000	185,250	163,000

[1] Nonqualified stock options outstanding of 264,000, 185,250 and 163,000 as of December 31, 2021, 2020 and 2019, respectively, have not been included in diluted earnings per share because to do so would have been antidilutive for the periods presented.

[2] The quarterly EPS amounts, when added, may not coincide with the full fiscal year EPS reported on the Consolidated Statements of Income due to differences in the computed weighted average shares outstanding as well as  rounding differences.