Leases - Components of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Leases [Abstract]
Operating lease cost	$ 22,423	$ 21,152	$ 67,132	$ 63,919
Sublease income	(21)	(573)	(81)	(1,688)
Other	0	18	0	54
Total lease cost	$ 22,402	$ 20,597	$ 67,051	$ 62,285