Leases Schedule of Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Jul. 04, 2020	Sep. 29, 2019	Sep. 28, 2019
Assets and Liabilities, Leases [Abstract]
Finance lease right-of-use asset	$ 37,484
Operating lease right-of-use assets	71,885	$ 75,790	$ 0
Total lease assets	109,369
Current finance lease liabilitlies	2,765
Current operating lease liabilities	8,061
Long-term finance lease liabilities	37,387
Long-term operating lease liabilities	38,077	$ 37,371	$ 0
Total lease liabilities	$ 86,290