Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Basic:
Net Income	$ 10,923	$ 9,713	$ 17,828	$ 17,381
Preferred Dividend	(30)	(30)	(60)	(60)
Earnings Applicable to Common Stock	$ 10,893	$ 9,683	$ 17,768	$ 17,321
Basic EPS	$ 0.62	$ 0.55	$ 1.02	$ 0.99
Weighted average number of basic shares outstanding	17,488	17,462	17,482	17,449
Diluted:
Adjusted Earnings Applicable to Common Stock	$ 10,910	$ 9,700	$ 17,802	$ 17,355
Diluted EPS	$ 0.62	$ 0.55	$ 1.01	$ 0.99
Weighted average number of diluted shares outstanding	17,603	17,577	17,597	17,564
Convertible Preferred Stock $7.00 Series [Member]
Diluted:
Preferred Dividend	$ 17	$ 17	$ 34	$ 34
Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock (in shares)	115	115	115	115