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Derivatives - Narrative (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 USD ($) institution | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) institution | Jun. 30, 2016 USD ($)
Derivative Instruments and Hedging Activities Disclosure |  |  |  |
Number of counterparties to open derivative contracts | institution | 7 |  | 7 |
Successor |  |  |  |
Derivative Instruments and Hedging Activities Disclosure |  |  |  |
(Gain) loss on derivative contracts | $ (23,543) |  | $ (57,726) |
Cash receipts, upon settlement of derivative contract |  |  | 2,706 |
Successor | Commodity Derivatives |  |  |  |
Derivative Instruments and Hedging Activities Disclosure |  |  |  |
(Gain) loss on derivative contracts | (23,500) |  | (57,700) |
Cash receipts, upon settlement of derivative contract | $ 3,300 |  | $ 2,700 |
Predecessor |  |  |  |
Derivative Instruments and Hedging Activities Disclosure |  |  |  |
(Gain) loss on derivative contracts |  | $ 7,969 |  | $ 5,161
Cash receipts, upon settlement of derivative contract |  |  |  | 57,970
Predecessor | Commodity Derivatives |  |  |  |
Derivative Instruments and Hedging Activities Disclosure |  |  |  |
(Gain) loss on derivative contracts |  | 8,000 |  | 5,200
Cash receipts, upon settlement of derivative contract |  | 32,400 |  | 58,000
Cash receipts, upon early settlement of derivative contract |  | $ 11,500 |  | $ 11,513

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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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