DEFINED BENEFIT RETIREMENT PLAN (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Defined benefit retirement plan
Fair value pension plans	$ 497,460	$ 485,724	$ 424,495
Level 2 member
Defined benefit retirement plan
Fair value pension plans	497,460	485,724
Temporary cash investments
Defined benefit retirement plan
Fair value pension plans	10,791	12,091
Temporary cash investments | Level 2 member
Defined benefit retirement plan
Fair value pension plans	10,791	12,091
Index linked gilts
Defined benefit retirement plan
Fair value pension plans	112,208	107,366
Index linked gilts | Level 2 member
Defined benefit retirement plan
Fair value pension plans	112,208	107,366
Corporate bonds
Defined benefit retirement plan
Fair value pension plans	166,604	347,083
Corporate bonds | Level 2 member
Defined benefit retirement plan
Fair value pension plans	166,604	347,083
Corporate stock
Defined benefit retirement plan
Fair value pension plans	141,029	19,184
Corporate stock | Level 2 member
Defined benefit retirement plan
Fair value pension plans	141,029	19,184
Diversified growth funds
Defined benefit retirement plan
Fair value pension plans	66,828
Diversified growth funds | Level 2 member
Defined benefit retirement plan
Fair value pension plans	$ 66,828