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Summary of Components Included in Reorganization Items (Detail) - USD ($) $ in Thousands | 3 Months Ended | 4 Months Ended | 5 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2017 | Jul. 31, 2017 | Dec. 31, 2017 | Jun. 30, 2017
Reorganizations [Line Items] |  |  |  |
Debt, sale leaseback and other reorganization items |  |  | $ 1,631 |
Reorganization-related professional fees |  |  | 2,668 |
Loss on reorganization items |  |  | $ 4,299 |
Predecessor |  |  |  |
Reorganizations [Line Items] |  |  |  |
Gain on settlement of Liabilities subject to compromise |  | $ (767,640) |  |
Fresh start adjustments |  | 1,820,018 |  |
Debt, sale leaseback and other reorganization items |  | 316,504 |  |
Reorganization-related professional fees |  | 28,023 |  |
Loss on reorganization items | $ 313,176 | $ 1,396,905 |  | $ 313,176

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