PENSION AND OTHER POSTRETIREMENT BENEFITS (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Dec. 25, 2011
PENSION AND OTHER POSTRETIREMENT BENEFITS [Abstract]
Pension and Other Postretirement Benefit Expense	$ 7,500	$ 8,700	$ 7,900
Defined Benefit Plan, Accumulated Benefit Obligation	170,000	194,400
Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year	100
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	30.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount	245
Defined Contribution Plan, Cost Recognized	3,900	5,700	5,500
Pension Plans, Defined Benefit [Member]
Statement [Line Items]
Expected contributions in 2014	9,100
Other Postretirement Benefit Plans, Defined Benefit [Member]
Statement [Line Items]
Expected contributions in 2014	$ 100
Minimum [Member]
Statement [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	2.14%
Maximum [Member]
Statement [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	6.00%