Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Numerator [Abstract]
Net income		$ 4,739	$ 4,440	$ 5,036	$ 5,051	$ 4,502	$ (6,519)	$ 5,126	$ 5,116	$ 19,266	$ 8,225	$ 25,000
Denominator [Abstract]
Weighted-average shares outstanding for basic earnings per share (in shares)										9,378,769	10,145,032	8,105,856
Dilutive effect of stock compensation (in shares)	[1]									385	2,279	131,782
Denominator for diluted earnings per share (in shares)										9,379,154	10,147,311	8,237,638
Earnings per common share [Abstract]
Basic (in dollars per share)		$ 0.52	$ 0.48	$ 0.54	$ 0.51	$ 0.45	$ (0.64)	$ 0.50	$ 0.50	$ 2.05	$ 0.81	$ 3.08
Diluted (in dollars per share)		$ 0.52	$ 0.48	$ 0.54	$ 0.51	$ 0.45	$ (0.64)	$ 0.50	$ 0.50	$ 2.05	$ 0.81	$ 3.03
Nonqualified Stock Options [Member]
Antidilutive securities [Abstract]
Antidilutive shares excluded from the calculation of earnings per share (in shares)										185,250	163,000	150,000

[1] Nonqualified stock options outstanding of 185,250, 163,000 and 150,000 as of December 31, 2020, 2019 and 2018, respectively, have not been included in diluted earnings per share because to do so would have been antidilutive for the periods presented.