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Property, Plant and Equipment - Additional information (Detail) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jul. 04, 2015 | Dec. 31, 2013 | Dec. 31, 2014
Property, Plant and Equipment [Line Items] |  |  |
Accumulated depreciation | $ 7,470,000 |  | $ 7,170,000
Property, plant and equipment net of accumulated depreciation, under a capital lease agreement | 21,600 |  | 22,800
Gross property, plant and equipment acquired under capital lease | 25,400 |  |
Total obligations associated with capital lease agreement | 22,100 |  | 23,200
Capital lease obligations classified in accrued expenses and other current liabilities | 2,200 |  | 2,200
Capital lease obligations classified in deferred credits and other liabilities | 19,900 |  | 21,000
Property plant and equipment written down |  | $ 21,000 |
Inventory written down |  | 7,000 |
Insurance receivable |  | $ 14,000 |
Initial payments from insurance receivables | 10,300 |  |
Property, plant and equipment, net | 5,120,870 |  | 5,287,639
Two remaining storage domes [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, net | 19,800 |  |
Net fixed assets associated with anticipated further development activities at the St. James Parish Site [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, net | $ 84,100 |  | $ 84,100

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