PROPERTY, PLANT AND EQUIPMENT (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014	Dec. 28, 2014
Property, Plant and Equipment [Abstract]
Depreciation	$ 38,800,000	$ 33,900,000	$ 109,400,000	$ 101,100,000
Payments for capital projects			129,848,000	131,349,000
Transfer of property, plant and equipment			101,500,000
Proceeds from property disposals	11,400,000	4,100,000	13,553,000	8,422,000
Net gain (loss) on property disposals	8,500,000	$ (26,700)	9,800,000	$ 1,100,000
Assets held for sale	6,555,000		6,555,000		$ 1,419,000
Idled assets, carrying amount	52,700,000		52,700,000
Idled assets, depreciable value	149,900,000		149,900,000
Idled assets, accumulated depreciation	$ 97,200,000		$ 97,200,000