Consolidated Balance Sheets (Parenthetical) (USD $)				3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Mar. 31, 2013 Series B Preferred Stock [Member]	Dec. 31, 2012 Series B Preferred Stock [Member]
Preferred stock, par value				$ 1.00	$ 1.00
Preferred Stock, Shares Authorized				5,000	5,000
Preferred Stock, Dividend Rate, Percentage or Per-Dollar-Amount				7.00%	7.00%
Preferred Stock, Shares Issued				5,000	4,880
Preferred Stock, Shares Outstanding				4,880	4,880
Preferred Stock, Liquidation Preference Per Share				$ 1,000	$ 1,000
Common Stock, Par or Stated Value Per Share	$ 1.00	$ 1.00
Common Stock, Shares Authorized	10,000,000	10,000,000
Common Stock, Shares, Issued	3,491,030	3,489,684
Common Stock, Shares, Outstanding	3,491,030	3,489,684	3,491,030