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Notes Payable (Schedule Notes Payable) (Details) - USD ($)
$ in Thousands
Aug. 31, 2015
Nov. 30, 2014
Debt Instrument [Line Items]    
Mortgages and notes payable $ 2,630,732 $ 2,576,525
Convertible Senior Notes Due Two Thousand Nineteen At One Point Three Seven Five Percent [Member] [Member]    
Debt Instrument [Line Items]    
Senior notes, rate 1.375%  
Mortgages and Land Contracts Due to Land Sellers and Other Loans [Member]    
Debt Instrument [Line Items]    
Mortgages and notes payable $ 41,244 $ 38,250
Senior Notes [Member] | Senior Notes Due Two Thousand Fifteen at Six Point Two Five Percent [Member]    
Debt Instrument [Line Items]    
Senior notes, rate   6.25%
Mortgages and notes payable $ 0 $ 199,891
Senior Notes [Member] | Senior notes due September 15, 2017 at 9.10%    
Debt Instrument [Line Items]    
Senior notes, rate 9.10% 9.10%
Mortgages and notes payable $ 263,282 $ 262,729
Senior Notes [Member] | Senior notes due June 15, 2018 at 7 1/4%    
Debt Instrument [Line Items]    
Senior notes, rate 7.25% 7.25%
Mortgages and notes payable $ 299,515 $ 299,402
Senior Notes [Member] | Senior Notes Due Two Thousand Nineteen at Four Point Seven Five Percent [Member]    
Debt Instrument [Line Items]    
Senior notes, rate 4.75% 4.75%
Mortgages and notes payable $ 400,000 $ 400,000
Senior Notes [Member] | Senior notes due March 15, 2020 at 8.00%    
Debt Instrument [Line Items]    
Senior notes, rate 8.00% 8.00%
Mortgages and notes payable $ 346,691 $ 346,253
Senior Notes [Member] | Senior Notes due December 15, 2021 at 7.00%    
Debt Instrument [Line Items]    
Senior notes, rate 7.00% 7.00%
Mortgages and notes payable $ 450,000 $ 450,000
Senior Notes [Member] | Senior notes due September 15, 2022 at 7.50%    
Debt Instrument [Line Items]    
Senior notes, rate 7.50% 7.50%
Mortgages and notes payable $ 350,000 $ 350,000
Senior Notes [Member] | Senior Notes Due Two Thousand Twenty Three At Seven Point Six Two Five Percent [Domain]    
Debt Instrument [Line Items]    
Senior notes, rate 7.625%  
Mortgages and notes payable $ 250,000 $ 0
Convertible Notes Payable [Member] | Convertible Senior Notes Due Two Thousand Nineteen At One Point Three Seven Five Percent [Member] [Member]    
Debt Instrument [Line Items]    
Senior notes, rate 1.375% 1.375%
Mortgages and notes payable $ 230,000 $ 230,000