EMPLOYEE BENEFITS (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 30, 2012	Dec. 25, 2011	Dec. 26, 2010
Retirement expense for continuing operations
Deferred compensation plan expense (credit)		$ (71)	$ 10,790
Total retirement expenses	1,384	745	16,358
Pension plan
Retirement expense for continuing operations
Service cost	5,540	5,600	5,885
Interest cost	91,898	92,961	93,796
Expected return on plan assets	(107,760)	(104,251)	(96,151)
Prior service cost amortization	14	14	14
Actuarial loss	12,687	6,726	2,229
Net pension expense	2,379	1,050	5,773
Post-retirement plans
Retirement expense for continuing operations
Interest cost	946	1,358
Net post-retirement benefit (credit) expense	$ (995)	$ (234)	$ (205)