Selected Balance Sheet Information - Property Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 25, 2021	Sep. 26, 2020
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 1,406,915	$ 1,396,400
Less: accumulated depreciation	(837,785)	(798,946)
Property, plant and equipment, net	569,130	597,454
Land and improvements [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	187,106	188,011
Buildings and improvements [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	114,309	114,934
Transportation equipment [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	27,848	35,495
Storage facilities [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	114,328	113,921
Equipment, primarily tanks and cylinders [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	901,945	887,512
Computer software [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	52,752	51,473
Construction in progress [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 8,627	$ 5,054

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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