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Investments in Marketable Securities (Tables)
9 Months Ended
Sep. 30, 2011
Investment in Marketable Securities [Abstract] 
Investments in marketable securities

 

                                 
    Investments in marketable securities  
    Cost     Gross
Unrealized
Losses		     Gross
Unrealized
Gains		     Estimated
Fair Value		  

Equity securities

   $ 18,060     $ (5,082 )    $ 906     $ 13,884  
   

 

 

    

 

 

    

 

 

    

 

 

  
    $ 18,060     $ (5,082 )    $ 906     $ 13,884