Consolidated Statements of Changes in Equity Parentheticals (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Series A Preferred Stock [Member]
Preferred Stock, Dividend Rate, Per-Dollar-Amount	$ 1.4625	$ 1.4625
Series C Preferred Stock [Member]
Preferred Stock, Dividend Rate, Per-Dollar-Amount	$ 1.5	$ 1.5