Inventories (Schedule of Capitalized Interest Costs) (Details) - USD ($) $ in Thousands		3 Months Ended
		Feb. 28, 2017	Feb. 29, 2016
Interest Costs
Capitalized interest at beginning of period		$ 306,723	$ 288,442
Interest incurred	[1]	50,079	46,251
Interest Expense	[1]	(6,307)	(3,697)
Interest amortized to construction and land costs	[2]	(39,384)	(30,682)
Capitalized interest at end of period		311,111	300,314
Loss on early extinguishment of debt		5,685	0
Land [Member]
Interest Costs
Interest amortized to construction and land costs		$ (500)	$ (500)

[1] The amount for the three months ended February 28, 2017 included a charge of $5.7 million for the early extinguishment of debt

[2] Interest amortized to construction and land costs for each of the three-month periods ended February 28, 2017 and February 29, 2016 included $.5 million related to land sales during the period