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AOCI Related to Derivative Transactions (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 14, 2018 | Jul. 15, 2017 | Jul. 14, 2018 | Jul. 15, 2017
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives | [1] | $ (8,809) | $ 7,238 | $ 1,661 | $ 3,720
Closed Contracts |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Estimated amount of derivatives to be reclassified in income from AOCI |  |  |  | (230) |
Closed Contracts | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Estimated amount of derivatives to be reclassified in income from AOCI |  |  |  | (196) |
Closed Contracts | Interest rate risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Estimated amount of derivatives to be reclassified in income from AOCI |  |  |  | (34) |
Expiring in 2018 |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | (597) |
Expiring in 2018 | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | (597) |
Expiring in 2019 |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | (4,837) |
Expiring in 2019 | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | (4,837) |
Expiring in 2020 |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | (335) |
Expiring in 2020 | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | (335) |
Expiring in 2021 |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | (109) |
Expiring in 2021 | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | (109) |
Closed or Expiring Over Next Four Years |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | (6,108) |
Closed or Expiring Over Next Four Years | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | (6,074) |
Closed or Expiring Over Next Four Years | Interest rate risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | $ (34) |
[1] | Amounts in parentheses indicate debits to determine net income (loss).

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