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Summary Of Significant Accounting Policies (Schedule Of Warranty Reserve) (Details) - USD ($)
$ in Thousands
12 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Movement in Standard Product Warranty Accrual [Roll Forward]    
Warranty reserve, beginning of year $ 341,765 $ 294,138
Warranties issued 217,641 191,311
Adjustments to pre-existing warranties from changes in estimates 29,436 29,461
Payments (211,821) (173,145)
Warranty reserve, end of year $ 377,021 $ 341,765