Leases Leases - Schedule of Maturities (Details) - USD ($) $ in Thousands	Sep. 26, 2020	Sep. 28, 2019
Leases - schedule of maturities [Abstract]
Lessee, Operating Lease, Liability, Payments, Due	$ 9,399	$ 9,051
Lessee, Operating Lease, Liability, to be Paid, Year Two	11,513	11,647
Lessee, Operating Lease, Liability, to be Paid, Year Three	9,622	10,665
Lessee, Operating Lease, Liability, to be Paid, Year Five	8,429	9,549
Lessee, Operating Lease, Liability, to be Paid, after Year Five	17,324	22,064
Lessee, Operating Lease, Liability, to be Paid	63,064	71,191
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	6,286	8,204
Operating Lease, Liability	56,778	62,987
Lessee, Operating Lease, Liability, to be Paid, Year Four	$ 6,777	$ 8,215