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Leases (Maturities of Lessee Lease Liabilities Schedule) (Details) - USD ($) $ in Thousands	Mar. 27, 2020	Sep. 28, 2019	Sep. 27, 2019
Operating Lease After Adoption of 842
Remainder of Fiscal 2020	$ 10,920
Fiscal 2021	15,915
Fiscal 2022	13,571
Fiscal 2023	11,571
Fiscal 2024	9,620
Thereafter	30,373
Total undiscounted lease payments	91,970
Less: imputed interest	(10,134)
Total lease liabilities	$ 81,836	$ 64,600
Operating Leases Before Adoption of 842
Remainder of Fiscal 2020			$ 17,231
Fiscal 2021			9,329
Fiscal 2022			7,191
Fiscal 2023			6,218
Fiscal 2024			4,499
Thereafter			12,355
Total undiscounted lease payments			$ 56,823