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