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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
May 31, 2020
Nov. 30, 2022
Nov. 30, 2021
Nov. 30, 2020
Dec. 01, 2020
Dec. 01, 2019
Nov. 30, 2019
Schedule of Equity Method Investments [Line Items]              
Cash equivalents   $ 15,800 $ 15,400        
Depreciation expense   32,300 28,600 $ 28,400      
Advertising costs incurred   37,100 28,000 29,300      
Legal Fees   10,600 11,500 11,600      
Operating lease, right-of-use asset   25,545 27,693     $ 31,200  
Operating lease liability   $ 27,580 $ 29,481     $ 31,200  
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]   Other assets Other assets     Other assets  
Operating Lease, Liability, Statement of Financial Position [Extensible List]   Accrued Liabilities Accrued Liabilities     Accounts payable and accrued expenses  
Stockholder's equity   $ 3,660,795 $ 3,019,475 2,665,769     $ 2,383,122
Reclassification of stranded tax effects       1,600      
Cumulative Effect, Period of Adoption, Adjustment              
Schedule of Equity Method Investments [Line Items]              
Stockholder's equity       (226)     1,510
Retained Earnings              
Schedule of Equity Method Investments [Line Items]              
Stockholder's equity   3,143,578 2,379,364 1,868,896     2,157,183
Reclassification of stranded tax effects       1,643      
Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment              
Schedule of Equity Method Investments [Line Items]              
Stockholder's equity       $ (226) $ (200) $ 1,500 $ 1,510
Homebuilding              
Schedule of Equity Method Investments [Line Items]              
Operating lease, right-of-use asset   25,469 27,508        
Operating lease liability   $ 27,494 $ 29,279        
Product Concentration Risk | Revenue Benchmark | Homebuilding              
Schedule of Equity Method Investments [Line Items]              
Concentration risk (in percent)   99.70% 99.70%        
Minimum | Computer Hardware and Software              
Schedule of Equity Method Investments [Line Items]              
Estimated useful life for depreciation of property and equipment   2 years          
Minimum | Model Furnishings and Sales Office Improvements              
Schedule of Equity Method Investments [Line Items]              
Estimated useful life for depreciation of property and equipment   2 years          
Minimum | Furniture and Fixtures              
Schedule of Equity Method Investments [Line Items]              
Estimated useful life for depreciation of property and equipment   3 years          
Maximum | Computer Hardware and Software              
Schedule of Equity Method Investments [Line Items]              
Estimated useful life for depreciation of property and equipment   15 years          
Maximum | Model Furnishings and Sales Office Improvements              
Schedule of Equity Method Investments [Line Items]              
Estimated useful life for depreciation of property and equipment   3 years          
Maximum | Furniture and Fixtures              
Schedule of Equity Method Investments [Line Items]              
Estimated useful life for depreciation of property and equipment   10 years          
Employee Severance              
Schedule of Equity Method Investments [Line Items]              
Severance charges $ 6,700