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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, 2021 | Nov. 30, 2020 | Nov. 30, 2019 | Dec. 01, 2020 | Dec. 01, 2019 | Dec. 01, 2018 | Nov. 30, 2018
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ 15,400 |  | $ 508,500 |  |  |  |  |  |
Depreciation expense |  | 28,600 |  | 28,400 |  | $ 27,200 |  |  |  |
Advertising costs incurred |  | 28,000 |  | 29,300 |  | 43,600 |  |  |  |
Legal Fees |  | 11,500 |  | 11,600 |  | 16,700 |  |  |  |
Stockholder's equity |  | 3,019,475 |  | 2,665,769 |  | 2,383,122 |  |  |  | $ 2,087,500
Operating lease, right-of-use asset |  | 27,693 | [1] | 36,270 | [1] |  |  | $ 31,200 |  |
Operating lease liability |  | 29,481 | [2] | $ 38,000 | [2] |  |  | $ 31,200 |  |
Reclassification of stranded tax effects |  | $ 1,600 |  |  |  |  |  |  |  |
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] |  | Accounts payable and accrued expenses |  | Accounts payable and accrued expenses |  |  |  | Accounts payable and accrued expenses |  |
Retained Earnings |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Stockholder's equity |  | $ 2,379,364 |  | $ 1,868,896 |  | 2,157,183 |  |  |  | 1,897,168
Reclassification of stranded tax effects |  |  |  | 1,643 |  |  |  |  |  |
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Stockholder's equity |  |  |  | (226) |  | 1,510 |  |  |  | 11,610
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Stockholder's equity |  |  |  | (226) |  | $ 1,510 | $ (200) | $ 1,500 | $ 11,600 | $ 11,610
Homebuilding |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Operating lease, right-of-use asset |  | 27,508 |  | 35,967 |  |  |  |  |  |
Operating lease liability |  | $ 29,279 |  | $ 37,668 |  |  |  |  |  |
Product Concentration Risk | Revenue Benchmark | Homebuilding |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Concentration risk (in percent) |  | 99.70% |  | 99.60% |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |
[1] | Represents lease right-of-use assets within our homebuilding operations and financial services operations of $27.5 million and $.2 million, respectively, at November 30, 2021, and $36.0 million and $.3 million, respectively, at November 30, 2020.
[2] | Represents lease liabilities within our homebuilding operations and financial services operations of $29.3 million and $.2 million, respectively, at November 30, 2021, and $37.7 million and $.3 million, respectively, at November 30, 2020

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