Basis of Presentation and Significant Accounting Policies (Impacts of Adopting ASC 606) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2021	May 31, 2020	Nov. 30, 2020
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Lease right-of-use assets	$ 32,567		$ 32,567		$ 36,270
Total revenues	1,440,892	$ 913,970	2,582,630	$ 1,989,905
Total pretax income	173,664	67,789	297,215	136,637
Income tax expense	(30,300)	(15,800)	(56,800)	(24,900)
Net income	$ 143,364	$ 51,989	$ 240,415	$ 111,737
Diluted earnings per share (in dollars per share)	$ 1.50	$ 0.55	$ 2.52	$ 1.19
Assets
Inventories	$ 4,272,566		$ 4,272,566		3,897,482
Property and equipment, net	69,336		69,336		65,547
Total assets	5,618,933		5,618,933		5,356,442
Stockholders’ equity:
Retained earnings	2,081,288		2,081,288		1,868,896
Financial Service [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Lease right-of-use assets	300		300		300
Contract assets	22,500		22,500		21,500
Total revenues	4,857	$ 3,690	8,587	$ 7,243
Selling, general and administrative expenses	(1,253)	(883)	(2,453)	(1,845)
Operating income	3,604	2,807	6,134	5,398
Total pretax income	10,648	7,604	19,148	13,417
Assets
Total assets	37,846		37,846		36,202
Home Building [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Lease right-of-use assets	32,322		32,322		35,967
Total revenues	1,436,035	910,280	2,574,043	1,982,662
Construction and land costs	(1,128,018)	(744,453)	(2,029,927)	(1,630,506)
Selling, general and administrative expenses	(145,115)	(114,238)	(267,120)	(240,372)
Operating income	162,902	51,589	276,996	111,784
Total pretax income	163,016	$ 60,185	278,067	$ 123,220
Assets
Inventories	4,272,566		4,272,566		3,897,482
Deferred tax assets, net	199,445		199,445		231,067
Property and equipment, net	69,336		69,336		65,547
Total assets	$ 5,581,087		$ 5,581,087		$ 5,320,240