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Commitments and Contingencies (Changes in the Warranty and Self-Insurance Liability) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
May 31, 2019
May 31, 2018
May 31, 2019
May 31, 2018
Changes in the Warranty Liability        
Balance at beginning of period $ 84,191 $ 71,845 $ 82,490 $ 69,798
Warranties issued 8,139 9,889 14,433 17,653
Payments (6,500) (5,330) (11,093) (11,047)
Balance at end of period 83,030 76,404 83,030 76,404
Movement In Self Insurance Reserve [Roll Forward]        
Balance at beginning of period 177,862 180,695 176,841 177,695
Self-insurance expense [1] 4,295 4,309 8,042 8,710
Payments (11,179) [2] (8,289) [2] (13,905) (9,690)
Balance at end of period 170,978 176,715 170,978 176,715
Standard and Extended Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties $ (2,800) $ 0 $ (2,800) $ 0
[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)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.