Consolidated Statements Of Shareholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Series 2009 Preferred Stock And Related Surplus [Member]
Preferred stock, dividend per share	$ 80.00	$ 80.00	$ 80.00
Preferred stock, shares issued	3,710	3,710	3,710
Series 2011 Preferred Stock And Related Surplus [Member]
Preferred stock, dividend per share	$ 40.00	$ 10.00
Preferred stock, shares issued	12,000	12,000