Property, Plant, and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 939,165	$ 895,311
Less accumulated depreciation	(562,593)	(532,183)
Property, plant, and equipment, net	376,572	363,128
Depreciation	38,715	37,337	$ 35,118
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	33,602	31,987
Building [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	218,319	203,762
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	658,613	640,642
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 28,631	$ 18,920

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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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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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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