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Loss Reclassified From AOCI for Commodity Contracts (Detail) - USD ($) $ in Thousands | 4 Months Ended
--- | ---
Apr. 21, 2018 | Apr. 22, 2017
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Net of tax |  | $ 297 | $ 474
Gains/Losses on Cash Flow Hedges |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Gross loss reclassified from AOCI into income | [1] | 397 | 771
Tax benefit | [1] | (100) | (297)
Net of tax | [1] | 297 | 474
Commodity Contract | Gains/Losses on Cash Flow Hedges |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Gross loss reclassified from AOCI into income | [1],[2] | 353 | 727
Tax benefit |  | (89) | (280)
Net of tax |  | $ 264 | $ 447
[1] | Amounts in parentheses indicate debits to determine net income (loss).
[2] | Amounts are presented as an adjustment to reconcile net income (loss) to net cash provided by operating activities on the Condensed Consolidated Statements of Cash Flows.

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- Definition Amount before tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph c -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41638-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e689-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e637-108580 + Details
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- Definition Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e689-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph c -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41638-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e637-108580 + Details
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