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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $) In Thousands, unless otherwise specified | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2011 | Jun. 25, 2011 | Dec. 29, 2012 Y | Dec. 31, 2011 | Dec. 25, 2010
Intangible assets |  |  |  |  |
Intangible assets lives, Minimum (in years) |  |  | 5 |  |
Intangible assets lives, Maximum (in years) |  |  | 20 |  |
Derivative Instrument |  |  |  |  |
Debt instrument issued, face amount |  | $ 150,000 |  |  |
Notional amount of derivative instrument |  | 130,000 |  |  |
Payment to counterparty to settle the derivative contract | 3,568 |  |  |  |
Loss on interest rate cash flow hedge derivative, recorded in accumulated other comprehensive income |  |  |  | 3,568 |
Foreign Currency Translation Adjustments |  |  |  |  |
Balance at the beginning of the period |  |  | 16,070 |  |
Current-period comprehensive income |  |  | 14,506 |  |
Balance at the end of the period |  |  | 30,576 | 16,070 |
Unrealized Loss on Cash Flow Hedge |  |  |  |  |
Balance at the beginning of the period |  |  | (3,335) |  |
Current-period comprehensive income |  |  | 400 |  |
Balance at the end of the period |  |  | (2,935) | (3,335) |
Defined Benefit Pension Plan |  |  |  |  |
Balance at the beginning of the period |  |  | 51,317 |  |
Current-period comprehensive income |  |  | (35,020) |  |
Balance at the end of the period |  |  | 16,297 | 51,317 |
Accumulated other comprehensive income (loss) |  |  |  |  |
Balance at the beginning of the period |  |  | 64,052 |  |
Current-period comprehensive income |  |  | (20,114) |  |
Balance at the end of the period |  |  | 43,938 | 64,052 |
Research and Development |  |  |  |  |
Research and development expenses |  |  | $ 7,100 | $ 6,200 | $ 5,500

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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph g -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 2 -Paragraph 12, 13 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 86 -Paragraph 11, 12 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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