Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Preferred stock, par value	$ 50	$ 50
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	59,251,836	54,359,784
Common stock, shares outstanding	59,251,836	54,359,784
Preferred Stock, Series C [Member]
Preferred stock, par value	$ 50	$ 50
Preferred stock, shares authorized	14,400	14,400
Preferred stock, shares issued	10,434	14,400
Preferred Stock, shares outstanding	10,434	14,400
Preferred Stock, Other Series [Member]
Preferred stock, par value	$ 50	$ 50
Preferred stock, shares authorized	981,260	981,260
Preferred stock, shares issued	0	0