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Fair Value Disclosures (Tables)
3 Months Ended
Feb. 29, 2012
Fair Value Disclosures [Abstract]  
Assets measured at fair value on a nonrecurring basis
                         
    Fair Value  

Description

  Hierarchy     February 29,
2012 (a)
    November 30,
2011 (a)
 

Long-lived assets held and used

    Level 2     $ —       $ 75  

Long-lived assets held and used

    Level 3       12,239       33,947  

Total

          $ 12,239     $ 34,022  
           

 

 

   

 

 

 
Carrying values and estimated fair values of financial instruments
                                 
    February 29, 2012     November 30, 2011  
    Carrying
Value
    Estimated
Fair Value
    Carrying
Value
    Estimated
Fair Value
 

Financial Liabilities:

                               

Senior notes due 2014 at 5  3/4%

  $ 193,452     $ 195,633     $ 249,647     $ 232,500  

Senior notes due 2015 at 5  7/8%

    169,626       170,007       299,273       270,000  

Senior notes due 2015 at 6  1/4%

    296,171       297,038       449,795       401,625  

Senior notes due 2017 at 9.10%

    261,001       278,250       260,865       235,519  

Senior notes due 2018 at 7  1/4%

    299,037       297,000       299,007       251,625  

Senior notes due 2020 at 8.00%

    344,858       351,750       —         —