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