Fresh Start Accounting - Reconciliation of Reorganization Value (Details) $ / shares in Units, shares in Thousands, $ in Thousands	Feb. 08, 2019 USD ($) $ / shares shares
Reorganizations [Abstract]
Enterprise value	$ 155,246
Plus: Cash	23,073
Plus: Restricted cash	5,675
Plus: Current liabilities	39,758
Plus: Asset retirement obligations (long-term)	2,303
Plus: Other long-term liabilities	2,845
Less: Fair value of 10% PIK Notes due 2024	(65,025)
Less: Fair value of Exit Facility	(45,269)
Fair value of Successor common stock	$ 73,700
Shares issued upon emergence (in shares) \| shares	9,371
Per share value \| $ / shares	$ 7.86
Reorganization value of Successor assets	$ 228,900

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Total current liabilities at the balance sheet date after fresh-start adjustments.

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Amount attributed to the reconstituted entity, as well as the expected net realizable value of those assets that will be disposed before reconstitution occurs.

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