PENSION PLANS - Other Changes in Plan Assets & Benefit Obligations Recognized in Other Comprehensive Loss Before Tax (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Jan. 01, 2012
Pension plans
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Income) Loss Before Tax
Net actuarial loss	$ (33,161)	$ 2,179	$ 18,254
Amount Recognized in Net Periodic Benefit Cost and Other Comprehensive Income (Loss), before Tax	(33,097)	43,650	79,188
Defined Benefit Postretirement Health Coverage [Member]
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Income) Loss Before Tax
Net actuarial loss			(122)
Prior service credit			(5,074)
Prior service credit recognized			27,695
Net actuarial loss recognized			(4,120)
Total recognized in other comprehensive (income) loss			18,379
Amount Recognized in Net Periodic Benefit Cost and Other Comprehensive Income (Loss), before Tax			$ (5,035)