Commitments and Contingencies (Changes in the Warranty Liability) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2015	Aug. 31, 2014	May. 31, 2015	Nov. 30, 2014	May. 31, 2014	Nov. 30, 2013
Loss Contingencies [Line Items]
Self Insurance Reserve		$ 80,601	$ 88,309	$ 80,601	$ 88,309	$ 80,136	$ 86,574	$ 90,458	$ 92,214
Expenses Associated with Self Insurance	[1]	4,694	3,108	11,919	8,761
Payments, Net of Recoveries for Self Insurance	[2]	(4,229)	(5,257)	(17,892)	(12,666)
Changes in the Warranty Liability
Balance at beginning of period		46,472	40,937	45,196	48,704
Warranties issued		6,325	4,546	15,209	12,332
Payments		(5,285)	(10,633)	(19,927)	(30,795)
Adjustments	[3]	1,130	7,546	8,164	12,155
Balance at end of period		48,642	42,396	48,642	42,396
Water Intrusion [Member]
Changes in the Warranty Liability
Payments		$ (1,100)	$ (7,200)	$ (8,600)	$ (21,300)

[1] These expenses are included in selling, general and administrative expenses and are largely offset by contributions from subcontractors participating in the wrap-up policy.

[2] Recoveries are reflected in the period we receive funds from subcontractors and/or their insurers.

[3] As discussed below, adjustments for the three months and nine months ended August 31, 2015 and 2014 were primarily comprised of the reclassification of estimated minimum probable recoveries to receivables. Adjustments for the nine months ended August 31, 2014 also included a reclassification of estimated minimum probable recoveries to establish a separate accrual for a water intrusion-related inquiry.