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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Nov. 30, 2011
Summary of Significant Accounting Policies [Abstract]  
Basic and diluted loss per share
                         
    Years Ended November 30,  
    2011     2010     2009  

Numerator:

                       

Net loss

  $ (178,768   $ (69,368   $ (101,784
   

 

 

   

 

 

   

 

 

 

Denominator:

                       

Basic and diluted average shares outstanding

    77,043         76,889       76,660  
   

 

 

   

 

 

   

 

 

 

Basic and diluted loss per share

  $ (2.32   $ (.90   $ (1.33