Basis of Presentation and Significant Accounting Policies (Impacts of Adopting ASC 606) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Dec. 01, 2019	Feb. 29, 2020	Feb. 28, 2019	Nov. 30, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Lease right-of-use assets		$ 32,388
Total revenues		1,075,935	$ 811,483
Total pretax income		68,848	34,511
Income tax expense		(9,100)	(4,500)
Net income		$ 59,748	$ 30,011
Diluted earnings per share (in dollars per share)		$ 0.63	$ 0.31
Assets
Inventories		$ 3,728,616		$ 3,704,602
Property and equipment, net		64,453		65,043
Total assets		5,052,834		5,015,482
Stockholders’ equity:
Retained earnings		2,211,851		2,157,183
Financial Service [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Lease right-of-use assets		400
Contract assets		21,100		20,600
Total revenues		3,553	$ 2,695
Selling, general and administrative expenses		(962)	(1,024)
Operating income		2,591	1,671
Total pretax income		5,813	2,473
Assets
Total assets		33,812		38,396
Home Building [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Lease right-of-use assets		32,036		0
Total revenues		1,072,382	808,788
Construction and land costs		(886,053)	(670,855)
Selling, general and administrative expenses		(126,134)	(106,594)
Operating income		60,195	31,339
Total pretax income		63,035	32,038
Assets
Inventories		3,728,616		3,704,602
Deferred tax assets, net		312,166		364,493
Property and equipment, net		64,453		65,043
Total assets		5,019,022		$ 4,977,086
Accounting Standards Update 2016-02 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Lease right-of-use assets	$ 31,199		0
Cumulative Effect on Retained Earnings, Net of Tax	$ 1,500
Accounting Standards Update 2014-09 [Member]
Assets
Inventories		0	(35,288)
Property and equipment, net		$ 0	$ 31,194