Commitments and Contingencies (Changes in the Warranty Liability) (Details) - USD ($) $ in Thousands		3 Months Ended
		Feb. 28, 2018	Feb. 28, 2017	Nov. 30, 2017	Nov. 30, 2016
Loss Contingencies [Line Items]
Self Insurance Reserve		$ 180,695	$ 159,882	$ 177,695	$ 158,584
Expenses Associated with Self Insurance	[1]	4,401	4,640
Payments, Net of Recoveries for Self Insurance		(1,365)	(2,040)
Changes in the Warranty Liability
Balance at beginning of period		69,798	56,682
Warranties issued		7,764	7,140
Payments		(5,717)	(6,112)
Balance at end of period		71,845	57,710
Self Insurance [Member]
Loss Contingencies [Line Items]
Loss Contingency, Receivable		71,200		71,300
Increase (Decrease) in Insurance Liabilities	[2]	(36)	$ (1,302)
Warranty and Other [Member]
Loss Contingencies [Line Items]
Loss Contingency, Receivable		$ 4,000		$ 4,100

[1] a)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] b)The amount for each period reflects changes in our self-insurance liability that were offset by changes in the receivable for estimated probable insurance and other recoveries to present our self-insurance liability on a gross basis.