Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Preferred stock, no par value
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, Series D ESOP stated value	$ 0.01	$ 0.01
Preferred stock, shares outstanding	629,611	638,353
Common stock, par value	$ 2.5	$ 2.5
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares outstanding	86,624,170	86,158,662