Basis of Presentation and Significant Accounting Policies (Cumulative Effect of Changes on Consolidated Balance Sheets Resulting From Adoption of ASC 606) (Details) - USD ($) $ in Thousands	May 31, 2019	Dec. 01, 2018	Nov. 30, 2018	May 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Inventories	$ 3,780,853		$ 3,582,839
Property and equipment, net	61,221		24,283
Total assets	4,919,953		5,073,571
Retained earnings	1,981,795	$ 1,908,778	1,897,168
Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Inventories		(35,288)		$ 0
Property and equipment, net		31,194		$ 0
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	1,971,335		1,897,168
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	10,460	11,610
Home Building [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Inventories	3,780,853	3,547,551	3,582,839
Deferred tax assets, net	424,395	437,796	441,820
Property and equipment, net	61,221	55,477	24,283
Total assets	4,889,233		5,061,191
Home Building [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Inventories	3,824,765		3,582,839
Deferred tax assets, net	428,019		441,820
Property and equipment, net	23,165		24,283
Home Building [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Inventories	(43,912)	(35,288)
Deferred tax assets, net	(3,624)	(4,024)
Property and equipment, net	38,056	31,194
Financial Service [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total assets	30,720	32,108	12,380
Contract assets	19,900	19,700
Financial Service [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total assets	10,780		$ 12,380
Financial Service [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total assets	$ 19,940
Contract assets		$ 19,728