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Financial Assets and Liabilities that are Measured At Fair Value and are Categorized Using Fair Value Hierarchy (Detail) (Fair Value, Measurements, Recurring, USD $) In Thousands, unless otherwise specified | Jun. 29, 2013 | Dec. 29, 2012
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Pension Plan |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Financial Assets | $ 25,311 | $ 25,281
Interest Rate Swap [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Financial Liabilities | 1,299 | 2,853
Contingent Consideration |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Financial Liabilities | 7,333 | 8,609
Fair Value, Inputs, Level 1 | Pension Plan |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Financial Assets | 24,511 | 24,346
Fair Value, Inputs, Level 1 | Interest Rate Swap [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Financial Liabilities | 0 | 0
Fair Value, Inputs, Level 1 | Contingent Consideration |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Financial Liabilities | 0 | 0
Fair Value, Inputs, Level 2 | Pension Plan |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Financial Assets | 800 | 935
Fair Value, Inputs, Level 2 | Interest Rate Swap [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Financial Liabilities | 1,299 | 2,853
Fair Value, Inputs, Level 2 | Contingent Consideration |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Financial Liabilities |  | 0
Fair Value, Inputs, Level 3 | Pension Plan |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Financial Assets | 0 | 0
Fair Value, Inputs, Level 3 | Interest Rate Swap [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Financial Liabilities | 0 | 0
Fair Value, Inputs, Level 3 | Contingent Consideration |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Financial Liabilities | $ 7,333 | $ 8,609

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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