Fixed Assets (Schedule Of Fixed Assets) (Details) - USD ($) $ in Thousands	Apr. 02, 2016	Jan. 02, 2016
Property, Plant and Equipment [Line Items]
Gross fixed assets	$ 887,157	$ 741,355
Accumulated depreciation	(353,528)	(339,802)
PP&E Net including assets held for sale	533,629	401,553
Fixed assets, net	533,563	401,465
Land and land improvements
Property, Plant and Equipment [Line Items]
Gross fixed assets	43,494	28,508
Buildings and building improvements
Property, Plant and Equipment [Line Items]
Gross fixed assets	199,361	156,725
Machinery, equipment and computer systems
Property, Plant and Equipment [Line Items]
Gross fixed assets	566,093	506,649
Trucks, trailers and automobiles
Property, Plant and Equipment [Line Items]
Gross fixed assets	33,602	33,760
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Gross fixed assets	5,156	4,210
Construction in progress
Property, Plant and Equipment [Line Items]
Gross fixed assets	36,182	11,503
Capital Leases
Property, Plant and Equipment [Line Items]
Gross fixed assets	3,269	0
Fixed assets held for sale
Property, Plant and Equipment [Line Items]
Fixed assets held for sale	$ (66)	$ (88)