PROPERTY, PLANT AND EQUIPMENT (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 24, 2012	Jun. 30, 2013	Jun. 24, 2012	Dec. 30, 2012
PROPERTY, PLANT AND EQUIPMENT [Abstract]
Depreciation	$ 34,200,000	$ 32,300,000	$ 68,000,000	$ 64,200,000
Proceeds from property disposals	1,200,000	9,400,000	2,883,000	12,461,000
Gain on property disposals	100,000	1,500,000	2,100,000	1,400,000
Assets held for sale	28,830,000		28,830,000		27,042,000
Idled asset accumulated depreciation	91,200,000		91,200,000
Idled asset property, plant and equipment gross	147,400,000		147,400,000
Idled assets property, plant and equipment, net	56,200,000		56,200,000
Gain (Loss) on Sale of Other Assets			(1,300,000)	(2,000,000)
Asset impairment				$ 1,342,000