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Gain (Loss) Reclassified From AOCI for Commodity Contracts (Detail) - USD ($)
$ in Thousands
4 Months Ended
Apr. 18, 2020
Apr. 20, 2019
Accumulated Other Comprehensive Income Loss [Line Items]    
Reclassification from AOCI, Gains and losses on cash flow hedges net of tax $ (411) $ 2,178
Derivative Instruments    
Accumulated Other Comprehensive Income Loss [Line Items]    
Gross (loss) gain reclassified from AOCI into net income [1] (547) 2,913
Tax expense (benefit) [1] 136 (735)
Reclassification from AOCI, Gains and losses on cash flow hedges net of tax [1] (411) 2,178
Commodity Contract | Derivative Instruments    
Accumulated Other Comprehensive Income Loss [Line Items]    
Gross (loss) gain reclassified from AOCI into net income [1],[2] (503) 2,957
Tax expense (benefit) 126 (747)
Reclassification from AOCI, Gains and losses on cash flow hedges net of tax $ (377) $ 2,210
[1] Amounts in parentheses indicate debits to determine net income.
[2] Amounts are presented as an adjustment to reconcile net (loss) income to net cash provided by operating activities on the     Condensed Consolidated Statements of Cash Flows.