Summary of Significant Accounting Policies (Property, Plant and Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 53,420	$ 53,022	$ 51,063
Land improvements | Minimum
Property, Plant and Equipment [Line Items]
Useful life	10 years
Land improvements | Maximum
Property, Plant and Equipment [Line Items]
Useful life	20 years
Buildings | Minimum
Property, Plant and Equipment [Line Items]
Useful life	10 years
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Useful life	40 years
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life	3 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life	12 years