Leases Schedule of Lease Expense and Other Information (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Jul. 04, 2020 USD ($)	Jul. 04, 2020 USD ($)
Leases [Abstract]
Amortization of right-of-use assets	$ 951	$ 3,220
Interest on lease liabilities	1,236	3,738
Operating lease expense	2,898	8,977
Other lease expense	957	2,216
Total lease expense	$ 6,042	$ 18,151
Weighted average remaining lease term, Finance Lease	12 years 9 months 18 days	12 years 9 months 18 days
Weighted average remaining lease term, Operating Lease	18 years 6 months	18 years 6 months
Weighted average discount rate, Finance Lease	17.60%	17.60%
Weighted average discount rate, Operating Lease	3.00%	3.00%
Operating cash flows used in finance leases	$ 1,152	$ 3,401
Operating cash flows used in operating leases	2,445	8,283
Finance cash flows used in finance leases	989	2,553
Right-of-use asset obtained in exchange for operating lease liability	83	7,592
Right-of-use asset obtained in exchange for finance lease liability	$ 2,133	$ 2,490