Commitments and Contingencies (Changes in Warranty Liability) (Details) - USD ($) $ in Thousands		12 Months Ended
		Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
Changes in the Company's warranty liability
Balance at beginning of year		$ 82,490	$ 69,798	$ 56,682
Warranties issued		35,480	37,792	38,452
Payments		(23,531)	(23,300)	(25,336)
Adjustments		(5,600)	(1,800)	0
Balance at end of year		88,839	82,490	69,798
Self Insurance Reserve, Balance at beginning of year		176,841	177,695	158,584
Expenses Associated with Self Insurance	[1]	16,685	20,436	20,371
Payments, Net of Recoveries for Self Insurance	[2]	(15,761)	(21,290)	(22,933)
Self Insurance Reserve, Balance at end of year		177,765	176,841	177,695
Self Insurance [Member]
Loss Contingencies [Line Items]
Increase (Decrease) in Insurance Liabilities	[3]	$ 0	$ 0	$ 21,673

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

[2] Includes net changes in estimated probable insurance and other recoveries, which are recorded in receivables, to present our self-insurance liability on a gross basis.

[3] The amount for 2017 reflected a change in estimate to increase our self-insurance liability based on an actuarially determined estimate that we believed had a higher probability of being adequate to cover future payments associated with unresolved claims, including claims incurred but not yet reported. This adjustment was included in selling, general and administrative expenses.