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Description of Business and Significant Accounting Policies - Narrative (Details) $ in Thousands	12 Months Ended
	Oct. 02, 2021 USD ($) numberOfEmployees	Oct. 03, 2020 USD ($)	Sep. 28, 2019 USD ($)	Sep. 29, 2019 USD ($)	Sep. 30, 2018 USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	$ 1,433,991	$ 1,295,079
Entity Number of Employees | numberOfEmployees	19,200,000
Exchange gains (losses) on foreign currency transactions	$ (1,100)	(400)	$ 500
Forward currency exchange contracts treated as cash flow hedges and recorded in accumulated other comprehensive loss	(2,200)	1,800	$ 1,100
Fair value of debt	217,100	299,300
Carrying value of debt	$ 205,000	$ 288,000
ASU 2016-02
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings				$ (1,100)
Engineering Design and Development Services
Disaggregation of Revenue [Line Items]
Percentage of consolidated net sales (less than)	5.00%	5.00%	5.00%
Adjustments due to the adoption of ASU 2014-09 | ASU 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings					$ 7,800

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