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Net Fair Value of Commodity Price Risk (Detail) - USD ($) $ in Thousands | Jul. 15, 2017 | Dec. 31, 2016
--- | --- | ---
Derivative Instruments, Gain (Loss) [Line Items] |  |
Assets | $ 6,409 | $ 1,611
Liabilities | (127) | (2,435)
Net Fair Value | 6,282 | (824)
Level 1 |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Assets | 6,409 | 1,611
Liabilities | (127) | (2,435)
Net Fair Value | 6,282 | (824)
Other Current Assets |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Assets | 6,245 | 1,576
Other Current Assets | Level 1 |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Assets | 6,245 | 1,576
Other LongTerm Assets |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Assets | 164 | 35
Other LongTerm Assets | Level 1 |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Assets | 164 | 35
Other Current Liabilities |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Liabilities |  | (2,435)
Other Current Liabilities | Level 1 |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Liabilities |  | $ (2,435)
Other LongTerm Liabilities |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Liabilities | (127) |
Other LongTerm Liabilities | Level 1 |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Liabilities | $ (127) |

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