INVESTMENTS IN SECURITIES (Details) (USD $)	12 Months Ended
Dec. 28, 2014	Dec. 29, 2013
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains recognized on available-for-sale securities	$ 1,000,000	$ 25,620
Gross realized losses recognized on available-for-sale securities	18,819	0
Cash equivalents, fixed income securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	204,286,000	103,121,000
Fair Value	204,286,000	103,121,000
Cash Equivalents, Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	80,000	56,000
Fair Value	80,000	56,000
Fixed income securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	0	96,902,000
Fair Value	$ 0	$ 96,902,000

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (aa)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

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This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

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-Paragraph 9

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