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Derivatives - Open Commodity Derivative Contracts (Details) - Successor	12 Months Ended
	Dec. 31, 2017 $ / Mcf $ / bbl MBbls MMcf
Oil Price Swaps, January 2018 - December 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional (Oil in MBbl/Natural Gas in MMcf) | MBbls	3,464
Weighted Avg. Fixed Price (Oil in USD/bbl, Natural Gas in USD/mcf) | $ / bbl	55.08
Oil Price Swaps, January 2019 - December 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional (Oil in MBbl/Natural Gas in MMcf) | MBbls	1,460
Weighted Avg. Fixed Price (Oil in USD/bbl, Natural Gas in USD/mcf) | $ / bbl	53.34
Natural Gas Price Swaps, January 2018 - December 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional (Oil in MBbl/Natural Gas in MMcf) | MMcf	17,300
Weighted Avg. Fixed Price (Oil in USD/bbl, Natural Gas in USD/mcf) | $ / Mcf	3.16

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