Property, Plant and Equipment - Assets Held Under Finance Leases (Details) - USD ($) $ in Thousands	Oct. 03, 2020	Sep. 28, 2019
Finance Leased Assets [Line Items]
Total property, plant and equipment held under finance leases, gross	$ 46,734	$ 47,841
Less: accumulated amortization	(10,326)	(8,762)
Total property, plant and equipment held under finance leases, net	36,408	39,079
Buildings and improvements
Finance Leased Assets [Line Items]
Total property, plant and equipment held under finance leases, gross	35,360	23,717
Machinery and equipment
Finance Leased Assets [Line Items]
Total property, plant and equipment held under finance leases, gross	11,374	12,293
Capital assets in progress
Finance Leased Assets [Line Items]
Total property, plant and equipment held under finance leases, gross	$ 0	$ 11,831