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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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services 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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Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 27, 2020	Dec. 29, 2019	Dec. 30, 2018
Property, Plant and Equipment
Property and equipment, gross	$ 692,515	$ 676,406
Accumulated depreciation and amortization	(491,620)	(464,665)	$ (438,278)
Property and equipment, net	200,895	211,741	$ 226,894
Land
Property, Plant and Equipment
Property and equipment, gross	33,381	33,349
Buildings and improvements
Property, Plant and Equipment
Property and equipment, gross	91,335	91,514
Leasehold improvements
Property, Plant and Equipment
Property and equipment, gross	123,167	121,127
Equipment and other
Property, Plant and Equipment
Property and equipment, gross	436,678	423,556
Construction in progress
Property, Plant and Equipment
Property and equipment, gross	$ 7,954	$ 6,860