Annual report pursuant to Section 13 and 15(d)

Shareholder's Equity (Details)

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Shareholder's Equity (Details) (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Jan. 19, 2011
Shareholders Equity [Line Items]          
Troubled Asset Relief Program (TARP) Equity capital received, Amount       $ 1,400,000,000  
Troubled Asset Relief Program (TARP) Equity capital received, Shares 1,967,071 1,967,071      
Common stock, par value $ 0.01 $ 0.01   $ 0.01  
Shareholder's Equity (Textuals) [Abstract]          
Term to exercise warrants (years)       10Y  
Purchase of common stock shares       23,600,000  
Purchase of common stock shares, exercise price       $ 8.90  
Purchase price of warrants originally issued to the Treasury         49,100,000
Cash dividends declared, prior period $ 0.10 $ 0.04 $ 0.04    
Floating Rate Series B Noncumulative Perpetual Preferred Stock Exchanged 35,500,000        
Trust-Preferred securities exchanged with applicable trust 32,500,000        
Trust-Preferred securities expected to be exchanged 3,000,000        
Issue of Series B preferred stock 23,800,000        
Redemption of Trust-preferred securities 35,500,000        
Gains on early extinguishment of debt $ 9,700,000        
Series B Preferred Stock Fixed [Member]
          
Shareholders Equity [Line Items]          
Troubled Asset Relief Program (TARP) Equity capital received, Shares       1,400,000