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	Aug. 31, 2020	Nov. 30, 2019	Dec. 01, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Inventories	$ 3,671,129	$ 3,704,602
Property and equipment, net	64,619	65,043
Total assets	5,177,427	5,015,482
Retained earnings	2,326,060	2,157,183
Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Inventories			$ (35,288)
Property and equipment, net			$ 31,194
Home Building [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Inventories	3,671,129	3,704,602
Deferred tax assets, net	241,171	364,493
Property and equipment, net	64,619	65,043
Total assets	5,142,666	4,977,086
Financial Service [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total assets	34,761	38,396
Contract assets	$ 21,600	$ 20,600