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Loss Reclassified From AOCI for Commodity Contracts (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Accumulated Other Comprehensive Income Loss [Line Items]      
Net of tax $ 1,367 $ 3,399 $ 5,413
Derivative Instruments      
Accumulated Other Comprehensive Income Loss [Line Items]      
Gross loss reclassified from AOCI into income [1] 2,222 5,528 8,801
Tax benefit [1] (855) (2,129) (3,388)
Net of tax [1] 1,367 3,399 5,413
Commodity Contract | Derivative Instruments      
Accumulated Other Comprehensive Income Loss [Line Items]      
Gross loss reclassified from AOCI into income [1],[2] 2,080 5,307 8,551
Tax benefit (801) (2,043) (3,292)
Net of tax $ 1,279 $ 3,264 $ 5,259
[1] Amounts in parentheses indicate debits to determine net income.
[2] Amounts are presented as an adjustment to reconcile net income to net cash provided by operating activities on the Consolidated Statements of Cash Flows.