Consolidated Statements of Changes in Equity (Parentheticals) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Series A Preferred Stock [Member]
Preferred Stock, Dividend Rate, Per-Dollar-Amount	$ 0.4875	$ 0.4875
Series C Preferred Stock [Member]
Preferred Stock, Dividend Rate, Per-Dollar-Amount	$ 0.50	$ 0.50