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GOODWILL AND INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 28, 2013 | Dec. 29, 2012 | Dec. 31, 2011
Components of amortized intangible assets |  |  |
Gross Carrying Amount | $ 194,345 | $ 185,389 |
Accumulated Amortization | 87,597 | 72,811 |
Amortization expense for intangible assets | 15,233 | 14,332 | 14,833
Estimated amortization expense |  |  |
2014 | 15,724 |  |
2015 | 14,817 |  |
2016 | 14,252 |  |
2017 | 14,212 |  |
2018 | 12,491 |  |
Customer Relationships |  |  |
Components of amortized intangible assets |  |  |
Gross Carrying Amount | 177,495 | 170,556 |
Accumulated Amortization | 76,024 | 62,957 |
Weighted Average Life | 13 years | 13 years |
Proprietary Software and Database |  |  |
Components of amortized intangible assets |  |  |
Gross Carrying Amount | 3,896 | 3,073 |
Accumulated Amortization | 2,896 | 2,795 |
Weighted Average Life | 6 years | 6 years |
Patents and Proprietary Technology |  |  |
Components of amortized intangible assets |  |  |
Gross Carrying Amount | 11,334 | 9,953 |
Accumulated Amortization | 7,239 | 5,517 |
Weighted Average Life | 8 years | 8 years |
Non-compete Agreements |  |  |
Components of amortized intangible assets |  |  |
Gross Carrying Amount | 1,620 | 1,807 |
Accumulated Amortization | $ 1,438 | $ 1,542 |
Weighted Average Life | 6 years | 6 years |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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