Defined Benefit Plans - Schedule of Changes in Projected Benefit Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation at beginning of year	$ 60,437	$ 51,499
Service cost	2,153	1,955	$ 2,262
Interest cost	857	1,308	1,230
Assumption change	(1,783)	9,505
Experience (gain) loss	22	(308)
Foreign exchange rate impacts	2,433	(1,889)
Benefits paid – total	(3,010)	(1,633)
Settlement gain	502	0
Projected benefit obligation at end of year	60,607	60,437	51,499
Projected benefit obligation	60,607	60,437
Fair value of plan assets	12,901	12,997	$ 12,486
Actual return on plan assets	1,218	539
Employer contributions	208	455
Benefits paid – funded plan	(1,522)	(483)
Unfunded status at end of year	(47,706)	(47,440)
Accrued benefit liability – current	(1,896)	(1,578)
Accrued benefit liability – non current	(45,810)	(45,862)
Accumulated other comprehensive (gain) loss (pre-tax)	456	2,590
United States
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	18,775	18,892
Fair value of plan assets	12,645	12,766
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	41,832	41,545
Fair value of plan assets	$ 256	$ 231