Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Basic:
Net Income	$ 5,807	$ 6,138	$ 13,465	$ 11,670
Preferred Dividend	(44)	(52)	(147)	(155)
Earnings Applicable to Common Stock	5,763	6,086	13,318	11,515
Basic EPS (in dollars per share)	$ 0.36	$ 0.39	$ 0.84	$ 0.73
Weighted-average number of basic shares outstanding (in shares)	15,882,000	15,741,000	15,839,000	15,717,000
Diluted:
Adjusted Earnings Applicable to Common Stock	5,793	6,124	13,425	11,630
Diluted EPS (in dollars per share)	$ 0.36	$ 0.38	$ 0.83	$ 0.73
Weighted-average diluted shares outstanding (in shares)	16,117,000	16,004,000	16,093,000	15,980,000
Convertible Preferred Stock $7.00 Series
Diluted:
Preferred Dividend	24	24	73	73
Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock (in shares)	167	167	167	167
Convertible Preferred Stock $8.00 Series
Diluted:
Preferred Dividend	$ 6	$ 14	$ 34	$ 42
Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock (in shares)	68	96	87	96