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Summary Of Significant Accounting Policies (Schedule Of Activity In The Warranty Accrual) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Oct. 03, 2015
Accounting Policies [Abstract]      
Warranty accrual at beginning of year $ 21,363 $ 18,660 $ 19,953
Additions from acquisitions 448 0 0
Warranties issued during current year 17,021 13,272 9,666
Adjustments to pre-existing warranties (509) (1,463) (2,416)
Reductions for settling warranties (12,747) (8,486) (7,448)
Foreign currency translation 272 (620) (1,095)
Warranty accrual at end of year $ 25,848 $ 21,363 $ 18,660