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Derivatives - Narrative (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 USD ($) financialInstitution | Jun. 30, 2017 USD ($) | Jun. 30, 2018 USD ($) financialInstitution | Jun. 30, 2017 USD ($)
Derivative Instruments And Hedging Activities Disclosure |  |  |  |
Loss (gain) on derivative contracts | $ 30,104 | $ (23,543) | $ 48,434 | $ (57,726)
Cash paid on settlement of derivative contracts |  |  | $ 17,393 | (2,706)
Number of counterparties to open derivative contracts | financialInstitution | 5 |  | 5 |
Commodity Derivatives |  |  |  |
Derivative Instruments And Hedging Activities Disclosure |  |  |  |
Loss (gain) on derivative contracts | $ 30,100 | (23,500) | $ 48,400 | (57,700)
Cash paid on settlement of derivative contracts | $ 11,300 | $ (3,300) | $ 17,400 | $ (2,700)

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- Definition Number Of Counterparties To Open Derivative Contracts + References No definition available. + Details
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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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