Commitments and Contingencies (Narrative) (Details)		12 Months Ended
		Nov. 30, 2019 USD ($) property Home claim_filed	Nov. 30, 2018 USD ($) property	Nov. 30, 2017 USD ($) property	Feb. 28, 2019	Nov. 30, 2016 USD ($)
Loss Contingencies [Line Items]
Impairment of Real Estate		$ 14,000,000.0	$ 26,100,000	$ 20,600,000
Operating Leases, Rent Expense, Net		$ 9,800,000	8,600,000	8,100,000
Minimum warranty on electrical and other building systems		2 years
Maximum Warranty on Electrical Heating Cooling Plumbing and Other Building Systems		5 years
Standard Product Warranty Accrual, Payments		$ 23,531,000	$ 23,300,000	$ 25,336,000
Number of Land Parcels or Communities Associated with Non Cash Inventory Impairment Charges | property		8	13	10
Insurance Recoveries				$ 23,500,000
Loss Contingency, Receivable, Estimated Recovery from Third Party				11,600,000
Commitments and Contingencies (Textual) [Abstract]
Structural warranty provided by the company		10 years
Warranty for other components of a home		1 year
Company's warranty liability		$ 88,839,000	$ 82,490,000	69,798,000		$ 56,682,000
Company's estimated liabilities for construction defect		177,765,000	176,841,000	177,695,000		$ 158,584,000
Expenses associated with self-insurance	[1]	16,685,000	20,436,000	$ 20,371,000
Performance bonds		793,900,000	689,300,000
Letters of Credit Outstanding, Amount		34,700,000	28,000,000.0
Non refundable deposits related to land option and other similar contracts		75,186,000	53,830,000
Aggregate Purchase Price Associated with Land Option and Other Similar Contracts		$ 1,423,519,000	1,371,238,000
Lessee, Operating Lease, Term of Contract					10 years
Damages from Product Defects [Member]
Loss Contingencies [Line Items]
Minimum Number of Affected Homes for Construction Defect Claims | Home		2
Self Insurance [Member]
Loss Contingencies [Line Items]
Reclassification of warranty recoveries to receivables		$ 50,600,000	56,900,000
Chapter 558 of the Florida Statutes [Member]
Loss Contingencies [Line Items]
Loss Contingency, New Claims Filed, Number | claim_filed		477
Minimum
Commitments and Contingencies (Textual) [Abstract]
Lessee, Operating Lease, Term of Contract		3 years
Maximum
Commitments and Contingencies (Textual) [Abstract]
Lessee, Operating Lease, Term of Contract		5 years
LOC Facilities [Member]
Commitments and Contingencies (Textual) [Abstract]
Letters of Credit Outstanding, Amount		$ 15,800,000	$ 0
Line of Credit Facility, Expiration Period		1 year

[1] These expenses are included in selling, general and administrative expenses and are largely offset by contributions from independent subcontractors participating in the wrap-up policy