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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) | 12 Months Ended
--- | ---
Nov. 30, 2024 | Nov. 30, 2023 | Nov. 30, 2022
Schedule of Equity Method Investments [Line Items] |  |  |
Cash equivalents | $ 385,100,000 | $ 508,200,000 |
Depreciation expense | 37,300,000 | 36,400,000 | $ 32,300,000
Investments in equity securities | 15,200,000 | 0 |
Advertising costs incurred | 39,900,000 | 34,200,000 | 37,100,000
Legal Fees | $ 8,700,000 | $ 10,400,000 | $ 10,600,000
Product Concentration Risk | Revenue Benchmark | Homebuilding |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Concentration risk (in percent) | 99.60% | 99.50% | 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 |  |

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