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Product Warranty (Schedule of Product Warranty Reserve) (Details) - USD ($)
$ in Thousands
3 Months Ended
Feb. 28, 2018
Feb. 28, 2017
Movement in Standard Product Warranty Accrual [Roll Forward]    
Warranty reserve, beginning of the period $ 164,619 $ 135,403
Warranties issued 24,689 20,720
Adjustments to pre-existing warranties from changes in estimates 2,868 2,346
Warranties assumed related to acquisitions 108,404 6,345
Payments (30,524) (25,827)
Warranty reserve, end of period $ 270,056 $ 138,987