PROPERTY, PLANT AND EQUIPMENT (Details) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Long-lived assets
Property, plant and equipment, at cost	$ 1,017,126	$ 994,774
Land and improvements
Long-lived assets
Property, plant and equipment, at cost	71,726	73,713
Buildings and improvements
Long-lived assets
Property, plant and equipment, at cost	265,112	254,171
Machinery and equipment
Long-lived assets
Property, plant and equipment, at cost	520,262	519,212
Transportation equipment
Long-lived assets
Property, plant and equipment, at cost	37,213	37,205
Office furniture and equipment
Long-lived assets
Property, plant and equipment, at cost	73,200	72,728
Construction in progress
Long-lived assets
Property, plant and equipment, at cost	$ 49,613	$ 37,745