Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (272,051)	$ 43,067	$ 61,328
Other comprehensive income (loss), net of tax
Foreign currency translation gain (loss) adjustments	16,986	(9,980)	(2,174)
Derivative instruments
Unrealized net gain (loss)	(3,968)	(2,141)
Unrealized net gain (loss)			4,325
Net (gain) loss reclassified to earnings	(645)	(2,905)
Net (gain) loss reclassified to earnings			(598)
Defined benefit pension plan
Unrealized net gain (loss)	1,193	(5,758)	(621)
Net (gain) loss reclassified to earnings	856	379	367
Currency exchange rate gain (loss)	(930)	456	90
Other comprehensive income (loss)	13,492	(19,949)	1,389
Comprehensive income (loss)	$ (258,559)	$ 23,118	$ 62,717