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Income Taxes - Additional Information (Detail) - USD ($) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jul. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Mar. 31, 2017 | Nov. 15, 2018
Income Tax [Line Items] |  |  |  |  |
Federal statutory tax rate |  | 21.00% |  | 35.00% |
Net deferred liabilities |  |  |  |  | $ 1,000,000
Cancellation of indebtedness (COD) income | $ 853,000,000 |  |  |  |
Total amount of reduction of tax attributes | 718,000,000 |  |  |  |
Net operating losses and depreciable assets | 358,000,000 |  |  |  |
Attribute reduction in stock of foreign subsidiaries | 330,000,000 |  |  |  |
Excess COD income attributed to subsidiaries | 122,000,000 |  |  |  |
Deferred tax recognized on excess COD income | 14,000,000 |  |  |  |
Valuation allowance |  | $ 106,447,000 | $ 43,218,000 |  |
Unrecognized deferred tax liability for temporary differences related to investments in foreign subsidiaries estimated amount |  | 5,000,000 | 4,000,000 |  |
Income tax penalties and interest |  | 21,600,000 | 9,800,000 |  |
Recognized provisional deemed dividend |  |  | 43,200,000 |  |
Reduction in net deferred tax asset |  | 27,300,000 |  |  |
Net impact in income loss |  | 0 |  |  |
Global intangible low taxed income recognized |  | $ 0 |  |  |
Internal Revenue Service (IRS) |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |
Balance sheet components restated from amount previously reported to reflect uncertain tax position |  |  | 13,400,000 |  |
Predecessor | Internal Revenue Service (IRS) |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |
Cumulative impact of error on income inclusion as prior period adjustment to retained earnings |  |  | 13,400,000 |  |
Scenario Plan |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |
Federal statutory tax rate |  | 21.00% |  |  |
Federal NOL |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | $ 225,000,000 |  |  |
Foreign NOL |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | 124,000,000 |  |  |
Tax credit |  | $ 13,000,000 | 2,000,000 |  |
Tax credit year expire, start year |  | 2022 |  |  |
Tax credit year expire, end year |  | 2027 |  |  |
Net operating loss carry forwards expiration period |  | 2025 |  |  |
Tax credit |  | $ 374,000,000 |  |  |
Domestic Subsidiaries |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |
Excess COD income attributed to subsidiaries | 136,000,000 |  |  |  |
Deferred tax recognized on excess COD income | $ 0 |  |  |  |
Intercompany Vessel Sales |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |
Remaining unamortized amount |  |  | $ 0 |  |

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