Inventories (Schedule of Capitalized Interest Costs) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		May 31, 2017	May 31, 2016	May 31, 2017	May 31, 2016
Interest Costs
Capitalized interest at beginning of period		$ 311,111	$ 300,314	$ 306,723	$ 288,442
Interest incurred	[1]	43,344	46,258	93,423	92,509
Interest Expense	[1]	0	(1,970)	(6,307)	(5,667)
Interest amortized to construction and land costs	[2]	(50,471)	(35,557)	(89,855)	(66,239)
Capitalized interest at end of period	[3]	303,984	309,045	303,984	309,045
Loss on early extinguishment of debt				5,685	0
Land [Member]
Interest Costs
Interest amortized to construction and land costs		$ (1,100)	$ (6,000)	$ (1,600)	$ (500)

[1] Interest incurred and interest expensed for the six months ended May 31, 2017 included a charge of $5.7 million for the early extinguishment of debt

[2] Interest amortized to construction and land costs for the three months ended May 31, 2017 included $1.1 million related to land sales during the period. Interest amortized to construction and land costs for the six months ended May 31, 2017 and 2016 included $1.6 million and $.5 million, respectively, related to land sales during those periods.

[3] Capitalized interest amounts presented in the table reflect the gross amount of capitalized interest, as inventory impairment charges recognized, if any, are not generally allocated to specific components of inventory.