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AOCI Related to Derivative Transactions (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 06, 2018 | Oct. 07, 2017 | Oct. 06, 2018 | Oct. 07, 2017
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives | [1] | $ 7,394 | $ (9,652) | $ 9,055 | $ (5,932)
Closed Contracts |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Estimated amount of derivatives to be reclassified in income from AOCI |  |  |  | (462) |
Closed Contracts | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Estimated amount of derivatives to be reclassified in income from AOCI |  |  |  | (453) |
Closed Contracts | Interest rate risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Estimated amount of derivatives to be reclassified in income from AOCI |  |  |  | (9) |
Expiring in 2018 |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | 29 |
Expiring in 2018 | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | 29 |
Expiring in 2019 |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | 2,073 |
Expiring in 2019 | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | 2,073 |
Expiring in 2020 |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | 32 |
Expiring in 2020 | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | 32 |
Expiring in 2021 |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | (120) |
Expiring in 2021 | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | (120) |
Closed or Expiring Over Next Four Years |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | 1,552 |
Closed or Expiring Over Next Four Years | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | 1,561 |
Closed or Expiring Over Next Four Years | Interest rate risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | $ (9) |
[1] | Amounts in parentheses indicate debits to determine net income (loss).

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