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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 |  |  |  |  |  |

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