Earnings Per Common Share (Calculation of Earnings Per Common 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
Earnings Per Common Share [Abstract]
Net income from continuing operations									$ 15,730	$ 16,284
Net loss from discontinued operations										(86)
Net Income	$ 3,886	$ 3,391	$ 5,335	$ 3,118	$ 4,014	$ 4,206	$ 4,224	$ 3,754	$ 15,730	$ 16,198
Weighted average shares outstanding - Basic (in shares)									12,380,000	12,725,000
Dilutive effect of common stock equivalents-options									1,000	5,000
Weighted average shares outstanding - Diluted (in shares)									12,381,000	12,730,000
Income from continuing operations									$ 1.27	$ 1.28
Loss from discontinued operations										(0.01)
Net income									$ 1.27	$ 1.27
Weighted average common stock excluded from calculation of diluted EPS									0	0