Emergence from Bankruptcy Proceedings - Components of liabilities and reorganization (Details) - USD ($) $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
Dec. 31, 2018	Nov. 19, 2018	Dec. 31, 2019	Dec. 31, 2017
Components of reorganization items:
Professional fees	$ 1,300	$ 82,787	$ 1,975	$ 6,447
Gain on settlement of liabilities subject to compromise		(794,218)
Discharge of claims upon emergence from bankruptcy		(80)
Revision of estimated claims				27
Escrow interest income		(2,940)
Fresh start accounting adjustments		2,514,115
Total reorganization items	$ 1,300	$ 1,799,664	$ 1,975	$ 6,474

Amount of reorganization items related to discharge of claims and liabilities gain.

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Amount of net gain (loss) on settlement of other claims for entities in bankruptcy, reported as a reorganization item.

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Amount of interest income on accumulated cash, reported as a reorganization item.

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-Publisher FASB
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Amount of reorganization items related to legal and advisory professional fees related to entities in bankruptcy.

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Amount of expense for claims expected to be incurred by an entity in reorganization.

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Amount recognized from the revaluation of assets and liabilities.

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Total amount of reorganization items.

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