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Basis of Presentation and Significant Accounting Policies (Narratives) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Nov. 30, 2018	Dec. 01, 2018
Cash equivalents	$ 367,300		$ 385,200
Other comprehensive income (loss)	30,000	$ (71,300)
Retained earnings	1,936,523		1,897,168	$ 1,908,778
Customer deposits	20,100		$ 19,500
Financial Service [Member]
Contract assets	19,800			19,700
Financial Service [Member] \| Product Concentration Risk [Member] \| Total Revenues [member]
Percentage of total revenue			0.30%
Home Building [Member] \| Product Concentration Risk [Member] \| Total Revenues [member]
Percentage of total revenue			99.70%
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] \| Accounting Standards Update 2014-09 [Member]
Retained earnings	$ 10,595			11,610
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] \| Accounting Standards Update 2014-09 [Member] \| Financial Service [Member]
Contract assets				$ 19,728