EMPLOYEE BENEFITS (Details 3) (USD $)	12 Months Ended		1 Months Ended		12 Months Ended			1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 25, 2011	May 31, 2011 Pension plan	Jan. 31, 2011 Pension plan item	Dec. 29, 2013 Pension plan	Dec. 30, 2012 Pension plan	Dec. 25, 2011 Pension plan	Jan. 31, 2014 Pension plan Subsequent event	Dec. 30, 2012 Post-retirement plans	Sep. 30, 2012 Post-retirement plans	Dec. 29, 2013 Post-retirement plans	Dec. 30, 2012 Post-retirement plans	Dec. 25, 2011 Post-retirement plans
Weighted average assumptions used for valuing benefit obligations
Discount rate (as a percent)					5.01%	4.17%			3.39%		4.36%	3.39%
Weighted average assumptions used in calculating expense
Expected long-term return on plan assets (as a percent)					8.00%	8.25%	8.25%
Discount rate (as a percent)					4.17%	5.31%	5.90%		3.31%	4.26%	3.39%		4.84%
Medical cost trend rates
Assumed health care cost trend rate (as a percent)											7.00%
Ultimate health care cost trend rate (as a percent)											5.00%
Effect of 1% increase in the assumed health care cost trend rate on benefit obligation											$ 500,000	$ 600,000
Effect of 1% decrease in the assumed health care cost trend rate on benefit obligation											500,000	600,000
Real property locations contributed, number				7
Contribution	49,700,000	49,710,000	163,000,000	49,700,000	7,600,000	40,000,000		25,000,000
Term of leases entered into for property contributed to pension plan				10 years
Gain or loss recognized on the contribution of property					0
Reduction in pension obligation		49,710,000		49,700,000
Financing obligation from contribution of real property					44,500,000
Expected benefit payments
2014					94,367,000						1,584,000
2015					97,659,000						1,316,000
2016					100,459,000						1,259,000
2017					104,887,000						1,203,000
2018					107,832,000						1,143,000
2019-2023					592,450,000						4,681,000
Total					$ 1,097,654,000						$ 11,186,000