CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Common stock, per share	$ 0.20	$ 0.20	$ 0.20
Series B Preferred Stock
Preferred stock, per share	$ 0.00	$ 8.33	$ 102.67
Series C Preferred Stock
Preferred stock, per share	$ 50.00	$ 50.00	$ 33.03