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Summary of Accounting Policies - Additional Information (Detail) (USD $)
3 Months Ended 9 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Sep. 28, 2013
Sep. 29, 2012
Dec. 29, 2012
Summary Of Accounting Policies [Line Items]          
Investments in unconsolidated affiliates $ 14,000,000   $ 14,000,000   $ 13,500,000
Equity investment dividends     0 0  
Purchases from unconsolidated affiliates $ 3,500,000 $ 2,700,000 $ 11,200,000 $ 10,800,000  
Minimum [Member]
         
Summary Of Accounting Policies [Line Items]          
Percentage of ownership interest under equity method accounting 20.00%   20.00%    
Maximum [Member]
         
Summary Of Accounting Policies [Line Items]          
Percentage of ownership interest under equity method accounting 50.00%   50.00%