EMPLOYEE BENEFITS (Details 3) (USD $)	1 Months Ended	12 Months Ended	1 Months Ended			12 Months Ended			1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Jan. 31, 2011	Dec. 25, 2011	Jan. 31, 2012 Pension plan	May 31, 2011 Pension plan	Jan. 31, 2011 Pension plan item	Dec. 30, 2012 Pension plan	Dec. 25, 2011 Pension plan	Dec. 26, 2010 Pension plan	Jan. 30, 2013 Pension plan Subsequent event	Dec. 30, 2012 Post-retirement plans	Sep. 30, 2012 Post-retirement plans	Dec. 30, 2012 Post-retirement plans	Dec. 25, 2011 Post-retirement plans	Dec. 26, 2010 Post-retirement plans	Dec. 30, 2012 Supplemental retirement plans	Dec. 25, 2011 Supplemental retirement plans	Dec. 26, 2010 Supplemental retirement plans
Weighted average assumptions used for valuing benefit obligations
Discount rate (as a percent)						4.17%	5.32%			3.39%		3.39%	4.26%
Weighted average assumptions used in calculating expense
Expected long-term return on plan assets (as a percent)						8.25%	8.25%	8.25%
Discount rate (as a percent)						5.31%	5.90%	6.05%		3.31%	4.26%		4.84%	5.09%
Medical cost trend rates
Assumed health care cost trend rate (as a percent)												7.50%
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												$ 600,000	$ 1,100,000
Effect of 1% decrease in the assumed health care cost trend rate on benefit obligation												600,000	1,000,000
Contributions and Cash Flows
Real property locations contributed, number					7
Contribution	49,700,000	49,710,000			49,710,000
Term of leases entered into for property contributed to pension plan					10 years
Reduction in pension obligation		49,710,000			49,710,000
Financing obligation from contribution of real property						46,300,000
Value of contributions to plan			40,000,000	163,000,000		48,122,000	220,227,000		7,500,000			2,468,000	2,673,000		8,200,000	7,400,000	7,500,000
Expected benefit payments
2013						91,119,000				1,859,000		1,859,000
2014						93,630,000				1,681,000		1,681,000
2015						97,071,000				1,532,000		1,532,000
2016						100,499,000				1,427,000		1,427,000
2017						105,278,000				1,340,000		1,340,000
2018-2022						582,046,000				5,448,000		5,448,000
Total						$ 1,069,643,000				$ 13,287,000		$ 13,287,000