Capitalization (Details 1) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Basic:
Net Income	$ 2,726	$ 6,138	$ 3,725	$ 1,807	$ 2,049	$ 5,143	$ 3,625	$ 2,630	$ 14,396	$ 13,447	$ 14,330
Preferred Dividend									(206)	(206)	(207)
Earnings Applicable to Common Stock									14,190	13,241	14,123
Weighted-average number of basic shares outstanding, shares									15,733,000	15,615,000	14,654,000
Basic EPS	$ 0.17	$ 0.39	$ 0.23	$ 0.11	$ 0.12	$ 0.33	$ 0.23	$ 0.17	$ 0.90	$ 0.85	$ 0.96
Diluted:
$7.00 Series Preferred Dividend									97	97	97
$8.00 Series Preferred Dividend									56	56	56
Adjusted Earnings Applicable to Common Stock									$ 14,343	$ 13,394	$ 14,276
Incremental common shares attributable to $7.00 series preferred shares, shares									166	166	166
Incremental common shares attributable to $8.00 series preferred shares, shares									96	96	96
Weighted-average diluted shares outstanding, shares									15,995,000	15,877,000	14,916,000
Diluted EPS	$ 0.17	$ 0.39	$ 0.23	$ 0.11	$ 0.12	$ 0.32	$ 0.23	$ 0.17	$ 0.90	$ 0.84	$ 0.96