Consolidated Statements Of Changes In Stockholders' Equity (Parenthetical) (USD $)	Dec. 31, 2010 Preferred Stock, Series A	Dec. 31, 2009 Preferred Stock, Series A	Dec. 31, 2011 Preferred Stock, Series C	Dec. 31, 2010 Preferred Stock, Series C	Dec. 31, 2011 Preferred Stock, Series E	Dec. 31, 2010 Preferred Stock, Series E
Preferred stock dividends declared	$ 0.50	$ 2.00	$ 0.50	$ 1.26	$ 1.50	$ 0.46