Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Changes in Shareholders' Equity (Parenthetical)

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Condensed Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Cash dividends declared:    
Common stock, Cash dividend per share $ 0.04 $ 0.04
Preferred stock dividend per share   $ 9.73
Series A Preferred Stock [Member]
    
Cash dividends declared:    
Preferred stock dividend per share $ 21.25 $ 21.25
Series B Preferred Stock Variable [Member]
    
Cash dividends declared:    
Preferred stock dividend per share $ 7.51