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Fresh Start Accounting - Narrative (Details) $ in Thousands	Oct. 01, 2016 USD ($)
Predecessor | Minimum
Schedule of Reorganization Items [Line Items]
Estimated enterprise value	$ 1,040,000
Predecessor | Maximum
Schedule of Reorganization Items [Line Items]
Estimated enterprise value	1,320,000
Successor
Schedule of Reorganization Items [Line Items]
Enterprise value	$ 1,089,808
Discount Factor	10.00%
Fair value of proved properties	$ 632,800
Fair value of undeveloped leasehold acreage	$ 113,900

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Undeveloped Leasehold Assets, Fair Value Disclosure

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