Preferred Stock (Details) (USD $)	12 Months Ended		1 Months Ended	12 Months Ended	1 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Feb. 20, 2009 Series A Preferred Stock [Member]	Dec. 31, 2012 Series A Preferred Stock [Member]	Feb. 20, 2009 Warrants [Member]
Class of Stock [Line Items]
Net proceeds from issuance of preferred stock and warrants			$ 17,211,000
Preferred stock, shares issued (in shares)			17,211
Preferred stock, par value (in dollars per share)	$ 0.40	$ 0.40	$ 0.40
Preferred stock, liquidation preferences (in dollars per share)	$ 1,000.00	$ 1,000.00	$ 1,000
Warrant term			10 years
Number of shares of common stock called by warrant (in shares)					584,084
Exercise price per share of warrants issued (in dollars per share)					$ 4.42
Discount rate on fair value of preferred stock (in hundredths)			12.00%
Expected life			5 years		5 years
Fair value of warrants	681,000	681,000			681,000
Calculated volatility rate (in hundredths)					53.00%
Weighted average dividend rate (in hundredths)					3.10%
Risk free interest rate (in hundredths)					2.00%
Initial carrying value of preferred stock	17,047,000	16,904,000	16,530,000
Preferred stock redemption value				17,211,000
Preferred stock annual dividend rate for first five years (in hundredths)				5.00%
Preferred stock annual dividend rate thereafter (in hundredths)			9.00%
Preferred stock effective yield (in hundredths)				5.94%
Dividends accrued to preferred stockholders	$ 3,144,000			$ 3,144,000
Number of dividend period failures to triggers board of director appointment rights	6			6
Number of dividend payments suspended	13			13
Number of directors expected to be appointed by the treasury department	1
Amount available for dividend distribution without prior consent from treasury department (in dollars per share)	$ 0.40