Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 27, 2020	Dec. 29, 2019
Leases [Abstract]
Operating cash flows for operating leases	$ 18,800	$ 19,715
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 10,293	$ 262,248