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	Dec. 01, 2019	Feb. 29, 2020	Nov. 30, 2019	Feb. 28, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Inventories		$ 3,728,616	$ 3,704,602
Property and equipment, net		64,453	65,043
Total assets		5,052,834	5,015,482
Retained earnings		2,211,851	2,157,183
Accounting Standards Update 2018-02 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax	$ 1,600
Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Inventories		0		$ (35,288)
Property and equipment, net		0		$ 31,194
Home Building [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
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
Financial Service [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total assets		33,812	38,396
Contract assets		$ 21,100	$ 20,600