Commitments and Contingencies (Changes in the Warranty Liability) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		May 31, 2017	May 31, 2016	May 31, 2017	May 31, 2016	Feb. 28, 2017	Nov. 30, 2016	Feb. 29, 2016	Nov. 30, 2015
Loss Contingencies [Line Items]
Self Insurance Reserve		$ 156,505	$ 156,733	$ 156,505	$ 156,733	$ 159,882	$ 158,584	$ 173,017	$ 173,011
Expenses Associated with Self Insurance	[1]	3,598	4,406	8,238	8,422
Payments, Net of Recoveries for Self Insurance		(2,720)	(12,029)	(4,760)	(15,435)
Changes in the Warranty Liability
Balance at beginning of period		57,710	50,575	56,682	49,085
Warranties issued		8,784	6,315	15,924	11,567
Payments		(6,457)	(8,446)	(12,569)	(12,467)
Adjustments		0	393	0	652
Balance at end of period		60,037	48,837	60,037	48,837
Self Insurance [Member]
Loss Contingencies [Line Items]
Loss Contingency, Receivable		78,900		78,900			84,500
Loss Contingency, Receivable, Period Increase (Decrease)	[2]	(4,255)	$ (8,661)	(5,557)	$ (9,265)
Warranty and Other [Member]
Loss Contingencies [Line Items]
Loss Contingency, Receivable		$ 11,600		$ 11,600			$ 14,600

[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] Amount for each period represents the changes in the estimated probable insurance and other recoveries that were reclassified to receivables to present our self-insurance liability on a gross basis.