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Effect of Derivative Instruments Located on the Condensed Consolidated Statements of Income, Utilized for Risk Management Purposes (Detail) - USD ($) $ in Thousands | 4 Months Ended
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Apr. 23, 2016 | Apr. 25, 2015
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amount of Gain or (Loss) Recognized in OCI on Derivatives (Effective Portion)(Net of tax) | [1] | $ 2,588 | $ (4,428)
Amount of (Gain) or Loss Reclassified from Accumulated OCI into Income (Effective Portion)(Net of tax) | [1] | (1,143) | (1,587)
Interest Rate Contracts | Interest Expense (Income) |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amount of (Gain) or Loss Reclassified from Accumulated OCI into Income (Effective Portion)(Net of tax) | [1] | (47) | (47)
Commodity Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amount of Gain or (Loss) Recognized in OCI on Derivatives (Effective Portion)(Net of tax) | [1] | 2,588 | (4,428)
Commodity Contract | Production Costs |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amount of (Gain) or Loss Reclassified from Accumulated OCI into Income (Effective Portion)(Net of tax) | [1],[2] | $ (1,096) | $ (1,540)
[1] | Amounts in parentheses indicate debits to determine net income.
[2] | Included in materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately).

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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624177-113959 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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