Commitments and Contingencies (Changes in the Warranty Liability) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		May 31, 2018	May 31, 2017	May 31, 2018	May 31, 2017	Feb. 28, 2018	Nov. 30, 2017	Feb. 28, 2017	Nov. 30, 2016
Loss Contingencies [Line Items]
Self Insurance Reserve		$ 176,715	$ 156,505	$ 176,715	$ 156,505	$ 180,695	$ 177,695	$ 159,882	$ 158,584
Expenses Associated with Self Insurance	[1]	4,309	3,598	8,710	8,238
Payments, Net of Recoveries for Self Insurance		(1,277)	(2,720)	(2,642)	(4,760)
Changes in the Warranty Liability
Balance at beginning of period		71,845	57,710	69,798	56,682
Warranties issued		9,889	8,784	17,653	15,924
Payments		(5,330)	(6,457)	(11,047)	(12,569)
Balance at end of period		76,404	60,037	76,404	60,037
Self Insurance [Member]
Loss Contingencies [Line Items]
Loss Contingency, Receivable		64,200		64,200			71,300
Increase (Decrease) in Insurance Liabilities	[2]	(7,012)	$ (4,255)	(7,048)	$ (5,557)
Warranty and Other [Member]
Loss Contingencies [Line Items]
Loss Contingency, Receivable		$ 3,000		$ 3,000			$ 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.