Fixed Assets (Schedule Of Fixed Assets) (Details) - USD ($) $ in Thousands	Oct. 01, 2016	Jan. 02, 2016
Property, Plant and Equipment [Line Items]
Gross fixed assets	$ 916,959	$ 741,355
Accumulated depreciation	(388,023)	(339,802)
PP&E Net including assets held for sale	528,936	401,553
Fixed assets, net	528,870	401,465
Land and land improvements
Property, Plant and Equipment [Line Items]
Gross fixed assets	44,250	28,508
Buildings and building improvements
Property, Plant and Equipment [Line Items]
Gross fixed assets	198,616	156,725
Machinery, equipment and computer systems
Property, Plant and Equipment [Line Items]
Gross fixed assets	582,340	506,649
Trucks, trailers and automobiles
Property, Plant and Equipment [Line Items]
Gross fixed assets	33,712	33,760
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Gross fixed assets	5,014	4,210
Construction in progress
Property, Plant and Equipment [Line Items]
Gross fixed assets	48,642	11,503
Capital Leases
Property, Plant and Equipment [Line Items]
Gross fixed assets	4,385	0
Fixed assets held for sale
Property, Plant and Equipment [Line Items]
Fixed assets held for sale	$ (66)	$ (88)