Commitments and Contingencies (Narratives) (Details) $ in Thousands	3 Months Ended
	Feb. 28, 2019 USD ($) Home claim_filed	Aug. 31, 2017 USD ($)	Nov. 30, 2018 USD ($)
Loss Contingencies [Line Items]
Minimum warranty on electrical and other building systems (in years)	2 years
Maximum warranty on electrical and other building systems (in years)	5 years
Warranty for other components of the home (in years)	1 year
Performance bonds	$ 707,600		$ 689,300
Letters of credit outstanding	$ 33,400		28,000
Warranty for other components of a home (in years)	1 year
Cash deposits	$ 49,802		53,830
Aggregate purchase price of land	$ 1,234,198		1,371,238
Damages from Product Defects [Member]
Loss Contingencies [Line Items]
Structural warranty provided by the company (in years)	10 years
Minimum number of affected homes for construction defect claims | Home	2
Warranty Obligations [Member]
Loss Contingencies [Line Items]
Structural warranty provided by the company (in years)	10 years
Self Insurance [Member]
Loss Contingencies [Line Items]
Recoveries related to warranty and other claims	$ 57,200		56,900
Warranty and other [Member]
Loss Contingencies [Line Items]
Recoveries related to warranty and other claims	4,100		$ 4,800
Northern California Townhome Community [Member]
Loss Contingencies [Line Items]
Claims for damages	$ 142,000	$ 100,000
Chapter 558 of the Florida Statutes [Member]
Loss Contingencies [Line Items]
Outstanding noticed claims | claim_filed	560