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Derivative Financial Instruments - Summary of Outstanding Commodity Derivative Agreements (Detail) - Commodity Hedging Agreements [Member] - USD ($)
6 Months Ended 12 Months Ended
Jul. 02, 2017
Jan. 01, 2017
Derivative Instruments And Hedging Activities Disclosures [Line Items]    
Notional amount of outstanding commodity derivative agreements $ 36,376,000 $ 13,146,000
Latest maturity date of outstanding commodity derivative agreements 2017-12 2017-12