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Derivatives - Open Commodity Derivative Contracts (Details) - Successor	9 Months Ended
	Sep. 30, 2017 $ / Mcf $ / bbl MBbls MMcf
Oil Price Swaps, October 2017- December 2017
Derivative Instruments and Hedging Activities Disclosure
Notional (Oil in MBbls/Natural Gas in MMcf) | MBbls	828
Weighted Avg. Fixed Price (Oil in USD/bbl, Natural Gas in USD/mcf) | $ / bbl	52.24
Oil Price Swaps, January 2018 - December 2018
Derivative Instruments and Hedging Activities Disclosure
Notional (Oil in MBbls/Natural Gas in MMcf) | MBbls	2,006
Weighted Avg. Fixed Price (Oil in USD/bbl, Natural Gas in USD/mcf) | $ / bbl	54.87
Natural Gas Price Swaps, October 2017 - December 2017
Derivative Instruments and Hedging Activities Disclosure
Notional (Oil in MBbls/Natural Gas in MMcf) | MMcf	8,280
Weighted Avg. Fixed Price (Oil in USD/bbl, Natural Gas in USD/mcf) | $ / Mcf	3.20
Natural Gas Price Swaps, January 2018 - December 2018
Derivative Instruments and Hedging Activities Disclosure
Notional (Oil in MBbls/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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