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Derivative Financial Instruments - Summary of Fair Values and Classification in Consolidated Balance Sheets of Derivative Instruments (Detail) - USD ($)
$ in Thousands
Jun. 28, 2015
Dec. 28, 2014
Jun. 29, 2014
Assets:      
Total assets $ 575 $ 0 $ 871
Liabilities:      
Total liabilities 681 0 0
Commodity Hedging Agreements Fair Market Value [Member] | Prepaid Expenses and Other Current Assets [Member]      
Assets:      
Total assets 428 0 871
Commodity Hedging Agreements Fair Market Value [Member] | Other Assets [Member]      
Assets:      
Total assets 147 0 0
Commodity Hedging Agreements Fair Market Value [Member] | Other Accrued Liabilities [Member]      
Liabilities:      
Total liabilities 569 0 0
Commodity Hedging Agreements Fair Market Value [Member] | Other Liabilities [Member]      
Liabilities:      
Total liabilities $ 112 $ 0 $ 0