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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
Mar. 30, 2013
Dec. 29, 2012
Pension Plan
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Financial Assets $ 25,281 $ 25,281
Interest Rate Swap [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Financial Liabilities 3,369 2,853
Contingent Consideration
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Financial Liabilities 8,210 8,609
Fair Value, Inputs, Level 1 | Pension Plan
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Financial Assets 24,346 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 935 935
Fair Value, Inputs, Level 2 | Interest Rate Swap [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Financial Liabilities 3,369 2,853
Fair Value, Inputs, Level 2 | Contingent Consideration
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Financial Liabilities 0 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 $ 8,210 $ 8,609