Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Preferred Stock
Stockholders' equity:
Preferred stock, par or stated value per share	$ 0.00	$ 0.00
Preferred stock, shares authorized	100,000	100,000
Series A Preferred Stock
Stockholders' equity:
Preferred stock, shares issued	8	8
Preferred stock, shares outstanding	8	8
Series C Preferred Stock
Stockholders' equity:
Preferred stock, shares issued	108	108
Preferred stock, shares outstanding	108	108
Series D Preferred Stock
Stockholders' equity:
Preferred stock, shares issued	3,280	3,280
Preferred stock, shares outstanding	3,280	3,280
Series E Preferred Stock
Stockholders' equity:
Preferred stock, par or stated value per share	$ 0.00	$ 0.00
Preferred stock, shares authorized	200	200
Preferred stock, shares issued	49	49
Preferred stock, shares outstanding	49	49
Series F Preferred Stock
Stockholders' equity:
Preferred stock, par or stated value per share	$ 0.00	$ 0.00
Preferred stock, shares authorized	7,000	7,000
Preferred stock, shares issued	7,000	7,000
Preferred stock, shares outstanding	7,000	7,000
Series G Preferred Stock
Stockholders' equity:
Preferred stock, par or stated value per share	$ 0.00	$ 0.00
Preferred stock, shares authorized	9,439	9,439
Preferred stock, shares issued	9,439	9,439
Preferred stock, shares outstanding	9,439	9,439
Common Stock
Stockholders' equity:
Common stock, par value	$ 10	$ 10
Common stock, shares authorized	400,000	400,000
Common stock, shares issued	141,911	134,530
Common stock, shares outstanding	141,911	134,530
Treasury Stock
Stockholders' equity:
Treasury stock, shares	0	3,204