Stockholders' Equity (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2008	Dec. 31, 2011	Nov. 21, 2008
Class of Stock [Line Items]
Preferred stock dividend rate percentage (in hundredths)		8.00%
Preferred stock, par value (in dollars per share)	$ 0.01		0.01
Common stock, par value (in dollars per share)	$ 0.01		0.01
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)	437,500		437,500
Preferred stock dividend rate percentage (in hundredths)	8.00%
Preferred stock liquidation preference (in dollars per share)	$ 8.00
Number of shares issued upon conversion (in shares)	1
Share conversion price (in dollars per share)	$ 8.00
Stock issuance cost	$ 247,000
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)	23,393		23,393	23,393
Preferred stock liquidation preference (in dollars per share)				$ 1,000
Stock issuance cost		45,000
Class of warrant or right, number of Securities called by warrants or rights (in shares)				556,976
Purchase price of warrant		23,393,000
Compounding dividends percentage for first five years (in hundredths)		5.00%
Compounding dividends percentage for after first five years (in hundredths)		9.00%
Period after which preferred stock redeemed		3 years
Number of directors authorized		2
Preferred dividends in arrears (in hundredth)	5.00%
Amount of preferred dividends in arrears	$ 899,000
Term of warrant		10 years
Exercise price of warrants (in dollars per share)		$ 6.30