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Consolidated Balance Sheets (Parenthetical) (USD $)
Sep. 30, 2011
Dec. 31, 2010
Shareholders' Equity  
Common stock, par value$ 0.10$ 0.10
Common stock, shares authorized25,000,00025,000,000
Common stock, shares issued11,945,25811,838,873
Common stock, shares outstanding11,945,25811,838,873
Series K Preferred Stock
  
Shareholders' Equity  
Preferred stock, par value$ 0.10$ 0.10
Preferred stock, liquidation preference$ 5,000$ 5,000
Preferred stock, shares authorized475475
Preferred stock, shares issued439439
Preferred stock, shares outstanding439439
Series E Preferred Stock
  
Shareholders' Equity  
Preferred stock, par value$ 0.10$ 0.10
Preferred stock, liquidation preference$ 5,000$ 5,000
Preferred stock, shares authorized8080
Preferred stock, shares issued8080
Preferred stock, shares outstanding8080
Series G Preferred Stock
  
Shareholders' Equity  
Preferred stock, par value$ 0.10$ 0.10
Preferred stock, liquidation preference$ 5,000$ 5,000
Preferred stock, shares authorized725725
Preferred stock, shares issued536536
Preferred stock, shares outstanding536536
Series H Preferred Stock
  
Shareholders' Equity  
Preferred stock, par value$ 0.10$ 0.10
Preferred stock, liquidation preference$ 5,000$ 5,000
Preferred stock, shares authorized125125
Preferred stock, shares issued7676
Preferred stock, shares outstanding7676
Series AAA Preferred Stock
  
Shareholders' Equity  
Preferred stock, par value$ 0.10$ 0.10
Preferred stock, liquidation preference$ 5,000$ 5,000
Preferred stock, shares authorized166166
Preferred stock, shares issued160166
Preferred stock, shares outstanding160166