Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Basic:
Net Income	$ 8,675	$ 5,381	$ 13,169	$ 9,822
Preferred Dividend	(36)	(36)	(72)	(72)
Earnings Applicable to Common Stock	$ 8,639	$ 5,345	$ 13,097	$ 9,750
Basic EPS	$ 0.53	$ 0.33	$ 0.80	$ 0.60
Weighted average number of basic shares outstanding	16,388	16,332	16,371	16,316
Diluted:
Adjusted Earnings Applicable to Common Stock	$ 8,662	$ 5,368	$ 13,143	$ 9,796
Diluted EPS	$ 0.52	$ 0.33	$ 0.80	$ 0.59
Weighted average number of diluted shares outstanding	16,544	16,488	16,527	16,472
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
Convertible Preferred Stock $8.00 Series [Member]
Diluted:
Preferred Dividend	$ 6	$ 6	$ 12	$ 12
Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock (in shares)	41	41	41	41