Selected Balance Sheet Information - Property Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 28, 2019	Sep. 29, 2018
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 1,390,450	$ 1,373,528
Less: accumulated depreciation	(763,243)	(724,310)
Property, plant and equipment, net	627,207	649,218
Land and improvements [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	189,911	189,314
Buildings and improvements [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	113,825	112,490
Transportation equipment [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	43,819	48,339
Storage facilities [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	112,372	110,419
Equipment, primarily tanks and cylinders [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	869,007	858,580
Computer software [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	49,780	49,847
Construction in progress [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 11,736	$ 4,539

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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