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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 |  |

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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930 + Details
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