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Mortgages and Notes Payable (Narratives) (Details) (USD $)
3 Months Ended 0 Months Ended 0 Months Ended 0 Months Ended
Feb. 28, 2014
Feb. 28, 2013
Nov. 30, 2013
Feb. 28, 2014
Letter of Credit [Member]
Mar. 12, 2013
Letter of Credit [Member]
Mar. 12, 2013
Revolving Credit Facility [Member]
Feb. 28, 2014
Revolving Credit Facility [Member]
Mar. 12, 2013
Revolving Credit Facility [Member]
Minimum [Member]
Mar. 12, 2013
Revolving Credit Facility [Member]
Maximum [Member]
Jan. 29, 2013
Convertible Senior Notes Due Two Thousand Nineteen At One Point Three Seven Five Percent [Member] [Member]
Feb. 28, 2014
Mortgages and Land Contracts Due to Land Sellers and Other Loans [Member]
Nov. 30, 2013
Mortgages and Land Contracts Due to Land Sellers and Other Loans [Member]
Jan. 29, 2013
Convertible Notes Payable [Member]
Convertible Senior Notes Due Two Thousand Nineteen At One Point Three Seven Five Percent [Member] [Member]
Feb. 28, 2014
Convertible Notes Payable [Member]
Convertible Senior Notes Due Two Thousand Nineteen At One Point Three Seven Five Percent [Member] [Member]
Nov. 30, 2013
Convertible Notes Payable [Member]
Convertible Senior Notes Due Two Thousand Nineteen At One Point Three Seven Five Percent [Member] [Member]
Feb. 28, 2014
Senior Notes [Member]
Senior notes due March 15, 2020 at 8.00%
Nov. 30, 2013
Senior Notes [Member]
Senior notes due March 15, 2020 at 8.00%
Feb. 28, 2014
Senior Notes [Member]
Senior notes due September 15, 2017 at 9.10%
Nov. 30, 2013
Senior Notes [Member]
Senior notes due September 15, 2017 at 9.10%
Feb. 28, 2014
Senior Notes [Member]
Senior notes due September 15, 2022 at 7.50%
Nov. 30, 2013
Senior Notes [Member]
Senior notes due September 15, 2022 at 7.50%
Debt Instrument [Line Items]                                          
Line of Credit Facility, Current Borrowing Capacity $ 200,000,000                                        
Unsecured revolving credit facility, expiration date           Mar. 12, 2016                              
Unsecured revolving credit facility, maximum borrowing capacity         100,000,000 300,000,000                              
Line of credit facility, unused capacity, commitment fee percentage               0.50% 0.75%                        
Line of Credit Facility, Amount Outstanding             0                            
Unsecured revolving credit facility, remaining borrowing capacity       100,000,000     200,000,000                            
Line of credit facility, significant subsidiary threshold, percent 5.00%                                        
Line of credit facility, non guarantor subsidiary threshold, percent 10.00%                                        
Debt Instrument, Face Amount                         230,000,000                
Senior notes, rate                   1.375%     1.375%     8.00% 8.00% 9.10% 9.10% 7.50% 7.50%
Percentage of Principal Amount in Relation to Issued Value of Senior Notes                         100.00%                
Debt Conversion, Converted Instrument, Shares Issued                         36.5297                
Debt instrument, convertible, conversion price                         $ 27.37                
Debt instrument, convertible, conversion premium                         47.00%                
Share price                         $ 18.62                
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities 8,402,000 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 change in control                           100.00%              
Proceeds from issuance of senior notes                         223,100,000                
Ownership share in guarantor subsidiaries (percent) 100.00%                                        
Letters of credit outstanding 41,700,000   41,500,000                                    
Inventories pledged to collateralize mortgages and land contracts, carrying value 101,600,000                                        
Notes and Loans Payable $ 2,175,190,000   $ 2,150,498,000               $ 37,970,000 $ 13,615,000   $ 230,000,000 $ 230,000,000 $ 345,842,000 $ 345,710,000 $ 262,213,000 $ 262,048,000 $ 350,000,000 $ 350,000,000