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Summary of Significant Accounting Policies - Reorganization Items (Details) - Predecessor - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 01, 2016 | Dec. 31, 2016
Schedule of Reorganization Items [Line Items] |  |
Unamortized long-term debt | $ 3,546,847 |
Litigation claims | (20,478) |
Rejections and cures of executory contracts | (16,038) |
Ad valorem and franchise taxes | (3,494) |
Legal and professional fees and expenses | (44,920) |
Write off of director and officer insurance policy | (7,533) |
Gain on accounts payable settlements | 84,228 |
Loss on mortgage | (8,153) |
Gain on preferred stock dividends | 37,893 |
Fresh start valuation adjustments | (28,549) |
Fair value of equity issued | (827,424) |
Principal value of Convertible Notes issued | (281,780) |
Gain on reorganization items, net | $ 2,430,599 | $ 2,430,599

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