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Fair Value Disclosures (Tables)
12 Months Ended
Nov. 30, 2011
Fair Value Disclosures [Abstract]  
Assets measured at fair value on a nonrecurring basis
                         
    Fair Value  

Description

  Hierarchy     November 30,
2011 (a)
    November 30,
2010 (a)
 

Long-lived assets held and used

    Level 2     $             75     $  

Long-lived assets held and used

    Level 3       33,947       11,570  
           

 

 

   

 

 

 

Total

          $ 34,022     $     11,570  
           

 

 

   

 

 

 
Carrying values and estimated fair values of financial instruments
                                 
    November 30,  
    2011     2010  
    Carrying
Value
    Estimated
Fair Value
    Carrying
Value
    Estimated
Fair
Value
 

Financial Liabilities:

                               

Senior notes due 2011 at 6 3/8%

  $             —     $             —     $ 99,916     $ 101,500  

Senior notes due 2014 at 5 3/4%

    249,647       232,500       249,498       246,250  

Senior notes due 2015 at 5 7/8%

    299,273       270,000       299,068       289,500  

Senior notes due 2015 at 6 1/4%

    449,795       401,625       449,745       435,375  

Senior notes due 2017 at 9.1%

    260,865       235,519       260,352       279,575  

Senior notes due 2018 at 7 1/4%

    299,007       251,625       298,893       286,500