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Product Warranties (Summary of Activity in Warranty Accrual) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Oct. 01, 2016
Movement in Standard Product Warranty Accrual [Roll Forward]      
Warranty accrual at beginning of period $ 25,848 $ 21,363 $ 18,660
Additions from acquisitions 184 448 0
Warranties issued during current period 15,705 17,021 13,272
Adjustments to pre-existing warranties (806) (509) (1,463)
Reductions for settling warranties (15,101) (12,747) (8,486)
Foreign currency translation (293) 272 (620)
Warranty accrual at end of period $ 25,537 $ 25,848 $ 21,363