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AOCI Related to Derivative Transactions (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 15, 2017 | Jul. 16, 2016 | Jul. 15, 2017 | Jul. 16, 2016
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives | [1] | $ 7,238 | $ (3,525) | $ 3,720 | $ (937)
Closed Contracts |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Estimated amount of derivatives to be reclassified in income from AOCI |  |  |  | (410) |
Closed Contracts | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Estimated amount of derivatives to be reclassified in income from AOCI |  |  |  | (295) |
Closed Contracts | Interest rate risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Estimated amount of derivatives to be reclassified in income from AOCI |  |  |  | (115) |
Expiring in 2017 |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | 1,650 |
Expiring in 2017 | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | 1,650 |
Expiring in 2018 |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | 2,257 |
Expiring in 2018 | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | 2,257 |
Expiring in 2019 |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | (44) |
Expiring in 2019 | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | (44) |
Closed or Expiring Over Next Three Years |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | 3,453 |
Closed or Expiring Over Next Three Years | Commodity price risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | 3,568 |
Closed or Expiring Over Next Three Years | Interest rate risk derivatives |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net change in fair value of derivatives |  |  |  | $ (115) |
[1] | Amounts in parentheses indicate debits to determine net income.

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