Property, Plant and Equipment - Assets Held Under Capital Leases (Details) - USD ($) $ in Thousands	Sep. 28, 2019	Sep. 29, 2018
Capital Leased Assets [Line Items]
Total property, plant and equipment held under capital leases, gross	$ 47,841	$ 42,459
Less: accumulated amortization	(8,762)	(6,123)
Total property, plant and equipment held under capital leases, net	39,079	36,336
Buildings and improvements
Capital Leased Assets [Line Items]
Total property, plant and equipment held under capital leases, gross	23,717	23,717
Machinery and equipment
Capital Leased Assets [Line Items]
Total property, plant and equipment held under capital leases, gross	12,293	10,995
Capital assets in progress
Capital Leased Assets [Line Items]
Total property, plant and equipment held under capital leases, gross	$ 11,831	$ 7,747