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Consolidated Statements Of Shareholders' Equity (Parenthetical) (USD $)
9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Subscription of 7,399 shares Series 2011 Preferred Stock, Shares   7,399
Series 2009 Preferred Stock And Related Surplus [Member]
   
Preferred stock, dividend per share $ 40.00 $ 40.00
Series 2011 Preferred Stock And Related Surplus [Member]
   
Preferred stock, dividend per share $ 40.00