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Supplemental Information On Oil And Gas Exploration And Production Activities (Costs Incurred In Oil and Gas Property Acquisition and Development Activities) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items] | |||
| Acquisition | $ 440,288us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties | $ 338,153us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties | $ 513,904us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties |
| Development of proved undeveloped properties | 864,511us-gaap_CostsIncurredDevelopmentCosts | 408,121us-gaap_CostsIncurredDevelopmentCosts | 121,787us-gaap_CostsIncurredDevelopmentCosts |
| Exploratory | 2,249us-gaap_CostsIncurredExplorationCosts | 26,174us-gaap_CostsIncurredExplorationCosts | 93,397us-gaap_CostsIncurredExplorationCosts |
| Recompletions | 45,658gpor_CostsIncurredRecompletionsOfOilAndGasProperties | 44,633gpor_CostsIncurredRecompletionsOfOilAndGasProperties | 24,643gpor_CostsIncurredRecompletionsOfOilAndGasProperties |
| Capitalized asset retirement obligation | 2,095us-gaap_CostsIncurredAssetRetirementObligationIncurred | 3,556us-gaap_CostsIncurredAssetRetirementObligationIncurred | 2,195us-gaap_CostsIncurredAssetRetirementObligationIncurred |
| Total | 1,354,801gpor_TotalCostsIncurredInOilAndGasPropertiesAcquisitionAndDevelopmentActivities | 820,637gpor_TotalCostsIncurredInOilAndGasPropertiesAcquisitionAndDevelopmentActivities | 755,926gpor_TotalCostsIncurredInOilAndGasPropertiesAcquisitionAndDevelopmentActivities |
| Diamondback Energy, Inc [Member] | |||
| Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items] | |||
| Acquisition |
0us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
44,534us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
49,895us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
| Development of proved undeveloped properties |
0us-gaap_CostsIncurredDevelopmentCosts / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
6,369us-gaap_CostsIncurredDevelopmentCosts / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
22,740us-gaap_CostsIncurredDevelopmentCosts / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
| Exploratory |
0us-gaap_CostsIncurredExplorationCosts / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
17,491us-gaap_CostsIncurredExplorationCosts / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
3,755us-gaap_CostsIncurredExplorationCosts / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
| Capitalized asset retirement obligation |
0us-gaap_CostsIncurredAssetRetirementObligationIncurred / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
50us-gaap_CostsIncurredAssetRetirementObligationIncurred / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
203us-gaap_CostsIncurredAssetRetirementObligationIncurred / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
| Total |
0gpor_TotalCostsIncurredInOilAndGasPropertiesAcquisitionAndDevelopmentActivities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
68,444gpor_TotalCostsIncurredInOilAndGasPropertiesAcquisitionAndDevelopmentActivities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
76,593gpor_TotalCostsIncurredInOilAndGasPropertiesAcquisitionAndDevelopmentActivities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
| Grizzly Oil Sands ULC [Member] | |||
| Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items] | |||
| Acquisition |
1,230us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
0us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
0us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
| Development of proved undeveloped properties |
7,107us-gaap_CostsIncurredDevelopmentCosts / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
0us-gaap_CostsIncurredDevelopmentCosts / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
0us-gaap_CostsIncurredDevelopmentCosts / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
| Exploratory |
0us-gaap_CostsIncurredExplorationCosts / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
0us-gaap_CostsIncurredExplorationCosts / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
0us-gaap_CostsIncurredExplorationCosts / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
| Capitalized asset retirement obligation |
1,055us-gaap_CostsIncurredAssetRetirementObligationIncurred / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
0us-gaap_CostsIncurredAssetRetirementObligationIncurred / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
0us-gaap_CostsIncurredAssetRetirementObligationIncurred / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
| Total |
$ 9,392gpor_TotalCostsIncurredInOilAndGasPropertiesAcquisitionAndDevelopmentActivities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
$ 0gpor_TotalCostsIncurredInOilAndGasPropertiesAcquisitionAndDevelopmentActivities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
$ 0gpor_TotalCostsIncurredInOilAndGasPropertiesAcquisitionAndDevelopmentActivities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
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- Definition
Costs incurred for the recompletion of oil and gas wells No definition available.
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- Definition
Total costs incurred in oil and gas properties acquisition and development activities No definition available.
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- Definition
Cost incurred, including capitalized costs and costs charged to expense, in acquisition of oil and gas properties. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of asset retirement obligations (ARO) costs incurred (whether capitalized or charged to expense) during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Development costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Exploration costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Details
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