Consolidated Balance Sheets (Parentheticals) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Preferred Stock [Member]
Stockholders' equity:
Preferred stock, par or stated value per share	$ 0	$ 0
Preferred stock, shares authorized	100,000	100,000
Series A Preferred Stock [Member]
Stockholders' equity:
Preferred stock, shares issued	8	8
Preferred stock, shares outstanding	8	8
Series C Preferred Stock [Member]
Stockholders' equity:
Preferred stock, shares issued	108	108
Preferred stock, shares outstanding	108	108
Series D Preferred Stock [Member]
Stockholders' equity:
Preferred stock, shares issued	3,280	3,280
Preferred stock, shares outstanding	3,280	3,280
Series E Preferred Stock [Member]
Stockholders' equity:
Preferred stock, par or stated value per share	$ 0	$ 0
Preferred stock, shares authorized	200	200
Preferred stock, shares issued	49	49
Preferred stock, shares outstanding	49	49
Series F Preferred Stock [Member]
Stockholders' equity:
Preferred stock, par or stated value per share	$ 0	$ 0
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 [Member]
Stockholders' equity:
Preferred stock, par or stated value per share	$ 0	$ 0
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 [Member]
Stockholders' equity:
Common stock, par value	$ 10.00	$ 10.00
Common stock, shares authorized	400,000	400,000
Common stock, shares issued	134,530	134,530
Common stock, shares outstanding	131,326	131,290
Treasury Stock [Member]
Stockholders' equity:
Treasury stock, shares	3,204	3,240