Schedule II - Summary Of Consolidated Allowances For Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Bad debt provision (recovery), net	$ 2,271	$ 1,930	$ 957
Allowance For Doubtful Accounts [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	5,371	3,923	3,411
Bad debt provision (recovery), net	2,142	1,930	957
Amounts written-off / payments	(2,378)	(551)	(330)
Currency translation	(131)	69	(115)
Ending balance	$ 5,004	$ 5,371	$ 3,923