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Mortgages and Notes Payable (Narrative) (Details) (USD $)
12 Months Ended 3 Months Ended 0 Months Ended 0 Months Ended 3 Months Ended 0 Months Ended 0 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended
Nov. 30, 2013
Nov. 30, 2012
Nov. 30, 2011
Nov. 30, 2013
Senior notes due February 1, 2014 at 5 3/4%
Nov. 30, 2013
Senior notes due January 15, 2015 at 5 7/8%
Oct. 29, 2013
Senior notes due December 15, 2021 at 7.00%
Jan. 29, 2013
Convertible senior notes due February 1, 2019 at 1.375%
Jul. 31, 2012
Senior Notes [Member]
Feb. 07, 2012
Senior Notes [Member]
Nov. 30, 2013
Senior Notes [Member]
Aug. 31, 2012
Senior Notes [Member]
Feb. 29, 2012
Senior Notes [Member]
Oct. 29, 2013
Senior Notes [Member]
Senior notes due February 1, 2014 at 5 3/4%
Nov. 30, 2013
Senior Notes [Member]
Senior notes due February 1, 2014 at 5 3/4%
Nov. 30, 2012
Senior Notes [Member]
Senior notes due February 1, 2014 at 5 3/4%
Jan. 28, 2004
Senior Notes [Member]
Senior notes due February 1, 2014 at 5 3/4%
Oct. 29, 2013
Senior Notes [Member]
Senior notes due January 15, 2015 at 5 7/8%
Nov. 30, 2013
Senior Notes [Member]
Senior notes due January 15, 2015 at 5 7/8%
Nov. 30, 2012
Senior Notes [Member]
Senior notes due January 15, 2015 at 5 7/8%
Dec. 15, 2004
Senior Notes [Member]
Senior notes due January 15, 2015 at 5 7/8%
Oct. 29, 2013
Senior Notes [Member]
Senior notes due June 15, 2015 at 6 1/4%
Nov. 30, 2013
Senior Notes [Member]
Senior notes due June 15, 2015 at 6 1/4%
Nov. 30, 2012
Senior Notes [Member]
Senior notes due June 15, 2015 at 6 1/4%
Jun. 27, 2005
Senior Notes [Member]
Senior notes due June 15, 2015 at 6 1/4%
Jun. 02, 2005
Senior Notes [Member]
Senior notes due June 15, 2015 at 6 1/4%
Nov. 30, 2013
Senior Notes [Member]
Senior notes due September 15, 2022 at 7.50%
Nov. 30, 2012
Senior Notes [Member]
Senior notes due September 15, 2022 at 7.50%
Jul. 31, 2012
Senior Notes [Member]
Senior notes due September 15, 2022 at 7.50%
Nov. 30, 2013
Senior Notes [Member]
Senior notes due December 15, 2021 at 7.00%
Oct. 29, 2013
Senior Notes [Member]
Senior notes due December 15, 2021 at 7.00%
Nov. 30, 2013
Senior Notes [Member]
Senior notes due September 15, 2017 at 9.10%
Nov. 30, 2012
Senior Notes [Member]
Senior notes due September 15, 2017 at 9.10%
Jul. 30, 2009
Senior Notes [Member]
Senior notes due September 15, 2017 at 9.10%
Nov. 30, 2011
Senior Notes [Member]
Senior notes due 2011 at 6 3/8%
Nov. 30, 2009
Senior Notes [Member]
Senior notes due 2011 at 6 3/8%
Jun. 30, 2004
Senior Notes [Member]
Senior notes due 2011 at 6 3/8%
Nov. 30, 2013
Senior Notes [Member]
Senior notes due June 15, 2018 at 7 1/4%
Nov. 30, 2012
Senior Notes [Member]
Senior notes due June 15, 2018 at 7 1/4%
Apr. 03, 2006
Senior Notes [Member]
Senior notes due June 15, 2018 at 7 1/4%
Nov. 30, 2013
Senior Notes [Member]
Senior notes due March 15, 2020 at 8.00%
Nov. 30, 2012
Senior Notes [Member]
Senior notes due March 15, 2020 at 8.00%
Feb. 07, 2012
Senior Notes [Member]
Senior notes due March 15, 2020 at 8.00%
Jan. 29, 2013
Convertible Notes Payable [Member]
Convertible senior notes due February 1, 2019 at 1.375%
Nov. 30, 2013
Convertible Notes Payable [Member]
Convertible senior notes due February 1, 2019 at 1.375%
Aug. 31, 2013
Convertible Notes Payable [Member]
Convertible senior notes due February 1, 2019 at 1.375%
Mar. 12, 2013
Revolving Credit Facility [Member]
Nov. 30, 2013
Revolving Credit Facility [Member]
Nov. 30, 2013
Letter of Credit [Member]
Mar. 12, 2013
Letter of Credit [Member]
Mar. 12, 2013
Minimum
Revolving Credit Facility [Member]
Rate
Mar. 12, 2013
Maximum
Revolving Credit Facility [Member]
Rate
Debt Instrument [Line Items]                                                                                                      
Line of Credit Facility, Expiration Date                                                                                           Mar. 12, 2016          
Line of Credit Facility, Maximum Borrowing Capacity                                                                                           $ 300,000,000     $ 100,000,000    
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage                                                                                                   0.50% 0.75%
Line of Credit Facility, Amount Outstanding                                                                                               0      
Line of Credit Facility, Remaining Borrowing Capacity                                                                                             200,000,000 100,000,000      
Line of Credit Facility, Significant Subsidiary Threshold, Percent                                                                                             5.00%        
Line of Credit Facility, Non Guarantor Subsidiary Threshold, Percent                                                                                             10.00%        
Ownership share in guarantor subsidiaries 100.00%                                                                                                    
Incremental Common Shares Attributable to Conversion of Debt Securities 7,044,000 0 0                                                                               8,401,831                
Percentage of Principal Amount in Relation to Redemption Value of Notes                                                                                       100.00%              
Percentage of Principal Amount for Purchase of Notes if Fundamental Change                                                                                       100.00%              
Letters of Credit Outstanding, Amount 41,500,000 41,900,000                                                                                                  
Gain (loss) on early extinguishment of debt 10,448,000 10,278,000 (3,612,000)             (10,400,000) 8,300,000 2,000,000                                                                              
Primarily inventories carrying value 37,900,000                                                                                                    
Senior notes                               250,000,000       300,000,000       150,000,000 300,000,000     350,000,000   450,000,000     265,000,000           300,000,000     350,000,000 230,000,000                
Extinguishment of Debt, Amount       56,300,000 11,000,000     244,900,000 340,000,000       19,700,000       91,100,000       37,000,000                         100,000,000 250,000,000                                
Senior notes, rate             1.375%             5.75% 5.75% 5.75%   5.88% 5.88% 5.875%   6.25% 6.25%   6.25% 7.50% 7.50% 7.50% 7.00% 7.00% 9.10% 9.10% 9.10%     6.375% 7.25% 7.25% 7.25% 8.00% 8.00% 8.00%                  
Early Repayment of Senior Debt           225,400,000   252,200,000 340,500,000                                                                                    
Percentage of principal amount in relation to issued value of senior notes                               99.474%       99.357%       100.614% 99.533%     100.00%   100.00%     98.014%           99.486%     98.523% 100.00%                
Percentage of principal amount for purchase of notes if change in control                                                                                         101.00%            
Debt Conversion, Converted Instrument, Shares Issued                                                                                     36.5297                
Debt Instrument, Convertible, Conversion Price                                                                                     $ 27.37                
Conversion Price Premium                                                                                     47.00%                
Share Price                                                                                     $ 18.62                
Proceeds from Convertible Debt                                                                                     222,700,000                
Long-term Debt, Fiscal Year Maturity [Abstract]                                                                                                      
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2013 8,800,000                                                                                                    
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2014 204,700,000                                                                                                    
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2015 0                                                                                                    
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2016 262,000,000                                                                                                    
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2017 299,300,000                                                                                                    
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due thereafter $ 1,380,000,000