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Chapter 11 Proceedings - Company's Audited Consolidated Balance Sheet (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Reorganizations [Abstract] |  |
Debt subject to compromise | $ 2,005,219 | $ 0
Accounts payable and accrued liabilities | 164,939 |
Asset retirement obligations | 63,566 | 0
Accrued interest on debt subject to compromise | 55,634 |
Other liabilities | 4,122 |
Liabilities subject to compromise | $ 2,293,480 | $ 0

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