Capital Assets (Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Oct. 03, 2020	Oct. 03, 2020	Sep. 28, 2019
Finite-Lived Intangible Assets [Line Items]
Total intangible assets	$ 384,200	$ 384,200	$ 378,644
Accumulated Amortization	(89,105)	(89,105)	(72,059)
Intangible assets, net	295,095	$ 295,095	$ 306,585
Weighted Average Useful Life (in Years)		14 years 1 month 6 days	14 years 4 months 24 days
Total		$ 49,871
Software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	53,171	53,171	$ 39,546
Accumulated Amortization	(16,299)	(16,299)	(16,035)
Net Carrying Value	36,872	$ 36,872	$ 23,511
Weighted Average Useful Life (in Years)		6 years 10 months 24 days	6 years 2 months 12 days
Technology and patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	58,575	$ 58,575	$ 63,015
Accumulated Amortization	(19,033)	(19,033)	(15,739)
Net Carrying Value	39,542	$ 39,542	$ 47,276
Weighted Average Useful Life (in Years)		14 years 8 months 12 days	14 years 10 months 24 days
Impairment of intangible assets, finite-lived		$ 9,674
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	24,688	24,688	$ 20,186
Accumulated Amortization	(4,752)	(4,752)	(3,808)
Net Carrying Value	19,936	$ 19,936	$ 16,378
Weighted Average Useful Life (in Years)		17 years 7 months 6 days	18 years 4 months 24 days
Impairment of intangible assets, finite-lived		$ 4,470
Customer lists
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	196,251	196,251	$ 192,488
Accumulated Amortization	(45,079)	(45,079)	(34,735)
Net Carrying Value	151,172	$ 151,172	$ 157,753
Weighted Average Useful Life (in Years)		15 years 8 months 12 days	15 years 7 months 6 days
Impairment of intangible assets, finite-lived		$ 20,591
Land-use rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,345	2,345	$ 2,303
Accumulated Amortization	(1,223)	(1,223)	(968)
Net Carrying Value	1,122	$ 1,122	$ 1,335
Weighted Average Useful Life (in Years)		26 years 1 month 6 days	25 years 8 months 12 days
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,070	$ 5,070	$ 3,606
Accumulated Amortization	(2,719)	(2,719)	(774)
Net Carrying Value	2,351	$ 2,351	$ 2,832
Weighted Average Useful Life (in Years)		1 year 8 months 12 days	4 years
Software Development Not Yet Placed In Service
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	35,466	$ 35,466	$ 21,840
Trade names
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	44,100	44,100	$ 57,500
Impairment of indefinite-lived intangible assets	$ 13,400
Other
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets, finite-lived		$ 1,736