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Notes Payable (Schedule of Notes Payable) (Details) - USD ($)
Nov. 30, 2018
Nov. 30, 2017
Feb. 17, 2015
Mar. 25, 2014
Mar. 25, 2014
Mar. 25, 2014
Oct. 29, 2013
Oct. 29, 2013
Oct. 29, 2013
Jan. 29, 2013
Jan. 29, 2013
Jan. 29, 2013
Jul. 31, 2012
Jul. 31, 2012
Jul. 31, 2012
Feb. 07, 2012
Feb. 07, 2012
Feb. 07, 2012
Apr. 03, 2006
Debt Instrument [Line Items]                                      
Notes payable $ 2,060,263,000 $ 2,324,845,000                                  
Convertible senior notes due February 1, 2019 at 1.375%                                      
Debt Instrument [Line Items]                                      
Debt Instrument, Interest Rate, Stated Percentage 1.375%                 1.375%                  
Mortgages and land contracts due to land sellers and other loans (at interest rates of 7% at November 30, 2013 and 6% to 7% at November 30, 2012)                                      
Debt Instrument [Line Items]                                      
Debt Instrument, Interest Rate, Stated Percentage 7.00%                                    
Notes payable $ 40,038,000 $ 10,203,000                                  
Mortgages and land contracts due to land sellers and other loans (at interest rates of 7% at November 30, 2013 and 6% to 7% at November 30, 2012) | Minimum                                      
Debt Instrument [Line Items]                                      
Debt Instrument, Interest Rate, Stated Percentage   3.00%                                  
Mortgages and land contracts due to land sellers and other loans (at interest rates of 7% at November 30, 2013 and 6% to 7% at November 30, 2012) | Maximum                                      
Debt Instrument [Line Items]                                      
Debt Instrument, Interest Rate, Stated Percentage   6.00%                                  
Senior Notes [Member] | Senior notes due September 15, 2017 at 9.10%                                      
Debt Instrument [Line Items]                                      
Debt Instrument, Interest Rate, Stated Percentage   9.10%                                  
Senior Notes [Member] | Senior notes due June 15, 2018 at 7 1/4%                                      
Debt Instrument [Line Items]                                      
Debt Instrument, Interest Rate, Stated Percentage   7.25%                                  
Debt Instrument, Interest Rate, Effective Percentage                                     7.30%
Notes payable $ 0 $ 299,867,000                                  
Debt Instrument, Face Amount                                     $ 300,000,000
Senior Notes [Member] | Senior notes due May 15, 2019 at 4.75%                                      
Debt Instrument [Line Items]                                      
Debt Instrument, Interest Rate, Stated Percentage 4.75% 4.75%                                  
Debt Instrument, Interest Rate, Effective Percentage       5.00%   5.00%                          
Notes payable $ 399,483,000 $ 398,397,000                                  
Debt Instrument, Face Amount [1]         $ 400,000,000                            
Senior Notes [Member] | Senior notes due March 15, 2020 at 8.00%                                      
Debt Instrument [Line Items]                                      
Debt Instrument, Interest Rate, Stated Percentage 8.00% 8.00%                                  
Debt Instrument, Interest Rate, Effective Percentage                               8.50%   8.50%  
Notes payable $ 347,790,000 $ 346,238,000                                  
Debt Instrument, Face Amount [2]                                 $ 350,000,000    
Senior Notes [Member] | Senior notes due December 15, 2021 at 7.00%                                      
Debt Instrument [Line Items]                                      
Debt Instrument, Interest Rate, Stated Percentage 7.00% 7.00%                                  
Debt Instrument, Interest Rate, Effective Percentage             7.20%   7.20%                    
Notes payable $ 447,359,000 $ 446,608,000                                  
Debt Instrument, Face Amount               $ 450,000,000 [1]           $ 450,000,000          
Senior Notes [Member] | Senior notes due September 15, 2022 at 7.50%                                      
Debt Instrument [Line Items]                                      
Debt Instrument, Interest Rate, Stated Percentage 7.50% 7.50%                                  
Debt Instrument, Interest Rate, Effective Percentage                         7.70%   7.70%        
Notes payable $ 347,731,000 $ 347,234,000                                  
Debt Instrument, Face Amount               $ 350,000,000           $ 350,000,000 [2]          
Senior Notes [Member] | Senior Notes Due Two Thousand Twenty Three At Seven Point Six Two Five Percent [Domain]                                      
Debt Instrument [Line Items]                                      
Debt Instrument, Interest Rate, Stated Percentage 7.625% 7.625%                                  
Debt Instrument, Interest Rate, Effective Percentage     7.80%                                
Notes payable $ 248,074,000 $ 247,726,000                                  
Debt Instrument, Face Amount [1]     $ 250,000,000                                
Convertible Notes Payable [Member] | Convertible senior notes due February 1, 2019 at 1.375%                                      
Debt Instrument [Line Items]                                      
Debt Instrument, Interest Rate, Stated Percentage 1.375% 1.375%                                  
Debt Instrument, Interest Rate, Effective Percentage                   1.90%   1.90%              
Notes payable $ 229,788,000 $ 228,572,000                                  
Debt Instrument, Face Amount [3]                     $ 230,000,000                
[1] (a)At our option, these notes may be redeemed, in whole at any time or from time to time in part, at a redemption price equal to the greater of (i) 100% of the principal amount of the notes being redeemed and (ii) the sum of the present values of the remaining scheduled payments of principal and interest on the notes being redeemed (exclusive of interest accrued to the applicable redemption date), discounted to the redemption date at a defined rate, plus, in each case, accrued and unpaid interest on the notes being redeemed to, but excluding, the applicable redemption date, except that three months prior to the stated maturity dates for the 4.75% Senior Notes due 2019 and the 7.00% Senior Notes due 2021 and until their respective maturity, and six months prior to the stated maturity date for the 7.625% Senior Notes due 2023 and until their maturity, the redemption price will be equal to 100% of the principal amount of the notes being redeemed, plus, in each case, accrued and unpaid interest on the notes being redeemed to, but excluding, the applicable redemption date.
[2] (b)At our option, these notes may be redeemed, in whole at any time or from time to time in part, at a redemption price equal to the greater of (i) 100% of the principal amount of the notes being redeemed and (ii) the sum of the present values of the remaining scheduled payments of principal and interest on the notes being redeemed (exclusive of interest accrued to the applicable redemption date), discounted to the redemption date at a defined rate, plus, in each case, accrued and unpaid interest on the notes being redeemed to the applicable redemption date.
[3] (c)Prior to the stated maturity date, we may, at our option, redeem all or part of the notes at a redemption price equal to 100% of the principal amount of the notes being redeemed plus accrued and unpaid interest to, but excluding, the redemption date.