Commitments and Contingencies (Changes in the Warranty Liability) (Details) - USD ($) $ in Thousands		3 Months Ended
		Feb. 28, 2017	Feb. 29, 2016	Nov. 30, 2016	Nov. 30, 2015
Loss Contingencies [Line Items]
Self Insurance Reserve		$ 159,882	$ 173,017	$ 158,584	$ 173,011
Expenses Associated with Self Insurance	[1]	4,640	4,016
Payments, Net of Recoveries for Self Insurance		(2,040)	(3,406)
Changes in the Warranty Liability
Balance at beginning of period		56,682	49,085
Warranties issued		7,140	5,252
Payments		(6,112)	(4,021)
Adjustments		0	259
Balance at end of period		57,710	50,575
Self Insurance [Member]
Loss Contingencies [Line Items]
Loss Contingency, Receivable		83,200		84,500
Loss Contingency, Receivable, Period Increase (Decrease)	[2]	(1,302)	$ (604)
Warranty and Other [Member]
Loss Contingencies [Line Items]
Loss Contingency, Receivable		$ 13,900		$ 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.