PROPERTY, PLANT AND EQUIPMENT (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014	Dec. 28, 2014
Property, Plant and Equipment [Line Items]
Depreciation	$ 36,600	$ 33,900	$ 70,600	$ 67,200
Payments for capital projects			87,694	90,814
Transfer of property, plant and equipment			74,200
Proceeds from property disposals	1,200	2,800	2,115	4,357
Gain (loss) on property disposals	400	$ 1,900	1,300	$ 1,400
Assets held for sale	6,580		6,580		$ 1,419
Idled assets property, plant and equipment, net	51,200		51,200
Idled asset property, plant and equipment gross	150,800		150,800
Idled asset accumulated depreciation	99,500		$ 99,500
Administrative restructuring charges [Member]
Property, Plant and Equipment [Line Items]
Impairment costs	$ 4,800