Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Basic:
Net Income	$ 6,743	$ 6,758	$ 15,467	$ 14,654
Preferred Dividend	(36)	(36)	(108)	(115)
Earnings Applicable to Common Stock	$ 6,707	$ 6,722	$ 15,359	$ 14,539
Basic EPS (in dollars per share)	$ 0.41	$ 0.42	$ 0.95	$ 0.91
Weighted-average number of basic shares outstanding (in shares)	16,202	16,097	16,161	16,030
Diluted:
Adjusted Earnings Applicable to Common Stock	$ 6,730	$ 6,745	$ 15,427	$ 14,614
Diluted EPS (in dollars per share)	$ 0.41	$ 0.42	$ 0.95	$ 0.90
Weighted-average diluted shares outstanding (in shares)	16,358	16,253	16,317	16,211
Convertible Preferred Stock $7.00 Series [Member]
Diluted:
Preferred Dividend	$ 17	$ 17	$ 50	$ 57
Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock (in shares)	115	115	115	140
Convertible Preferred Stock $8.00 Series [Member]
Diluted:
Preferred Dividend	$ 6	$ 6	$ 18	$ 18
Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock (in shares)	41	41	41	41