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GOODWILL AND INTANGIBLE ASSETS - Amortized Intangible Assets - (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 26, 2015 | Sep. 27, 2014 | Sep. 26, 2015 | Sep. 27, 2014 | Dec. 27, 2014
Components of amortized intangible assets |  |  |  |  |
Gross Carrying Amount | $ 222,225 |  | $ 222,225 |  | $ 228,027
Accumulated Amortization | 114,427 |  | 114,427 |  | 103,050
Amortization expense for intangible assets | 4,507 | $ 4,702 | 14,157 | $ 13,439 |
Estimated amortization expense |  |  |  |  |
2015 | 18,154 |  | 18,154 |  |
2016 | 15,944 |  | 15,944 |  |
2017 | 15,898 |  | 15,898 |  |
2018 | 14,261 |  | 14,261 |  |
2019 | 13,434 |  | 13,434 |  |
Customer Relationships |  |  |  |  |
Components of amortized intangible assets |  |  |  |  |
Gross Carrying Amount | 202,199 |  | 202,199 |  | 207,509
Accumulated Amortization | 98,523 |  | $ 98,523 |  | $ 88,538
Weighted Average Life |  |  | 13 years |  | 13 years
Proprietary Software & Database |  |  |  |  |
Components of amortized intangible assets |  |  |  |  |
Gross Carrying Amount | 3,534 |  | $ 3,534 |  | $ 3,769
Accumulated Amortization | 2,929 |  | $ 2,929 |  | $ 2,977
Weighted Average Life |  |  | 8 years |  | 8 years
Patents & Proprietary Technology |  |  |  |  |
Components of amortized intangible assets |  |  |  |  |
Gross Carrying Amount | 12,659 |  | $ 12,659 |  | $ 12,394
Accumulated Amortization | 9,211 |  | $ 9,211 |  | $ 8,537
Weighted Average Life |  |  | 8 years |  | 8 years
Other |  |  |  |  |
Components of amortized intangible assets |  |  |  |  |
Gross Carrying Amount | 3,833 |  | $ 3,833 |  | $ 4,355
Accumulated Amortization | $ 3,764 |  | $ 3,764 |  | $ 2,998
Weighted Average Life |  |  | 3 years |  | 3 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 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: 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 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 Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + 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 for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + 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 for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + 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 for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + 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 before 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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