Shareholders' Equity (Preferred Stock and Thrift Bad Debt Reserves) (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended				12 Months Ended			0 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 04, 2012	Dec. 31, 2011	Dec. 31, 2012 Series E Preferred Stock [Member]	Dec. 31, 2013 Series E Preferred Stock [Member]	Dec. 04, 2012 Series E Preferred Stock [Member]	Dec. 16, 2009 Series A Preferred Stock [Member]	Dec. 31, 2013 Series A Preferred Stock [Member]	Dec. 31, 2012 Series A Preferred Stock [Member]	Jun. 30, 2008 Series A Preferred Stock [Member]
Class of Stock [Line Items]
Depository shares issued			5,060,000
Ownership interest in one share							0.10%
Preferred stock dividend rate					6.40%				8.50%
Preferred stock, par value					$ 0.01	$ 0.01	$ 0.01		$ 0.01	$ 0.01	$ 0.01
Preferred stock liquidation preference per share							$ 25,000				$ 1,000
Depository share per share amount			$ 25
Preferred stock, shares issued									28,939
Conversion of preferred shares to common shares ratio								36.8046
Common stock closing price threshold	130.00%
Common Stock, Conversion Price Trading Days Period	20 days
Thrift bad debt reserve		$ 58.0		$ 58.0