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 |