Supplemental Information On Oil And Gas Exploration And Production Activities (Capitalized Costs Related to Oil and Gas Producing Activities) (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2014
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Dec. 31, 2013
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Reserve Quantities [Line Items] | ||
Proven properties | $ 2,457,616us-gaap_CapitalizedCostsProvedProperties | $ 1,526,588us-gaap_CapitalizedCostsProvedProperties |
Unproven properties | 1,465,538us-gaap_CapitalizedCostsUnprovedProperties | 950,590us-gaap_CapitalizedCostsUnprovedProperties |
Capitalized costs, gross | 3,923,154us-gaap_CapitalizedCostsOilAndGasProducingActivitiesGross | 2,477,178us-gaap_CapitalizedCostsOilAndGasProducingActivitiesGross |
Accumulated depreciation, depletion, amortization and impairment reserve | (1,044,273)us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities | (779,561)us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities |
Net capitalized costs | 2,878,881us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet | 1,697,617us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet |
Diamondback Energy, Inc [Member] | ||
Reserve Quantities [Line Items] | ||
Proven properties |
0us-gaap_CapitalizedCostsProvedProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
92,074us-gaap_CapitalizedCostsProvedProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
Unproven properties |
0us-gaap_CapitalizedCostsUnprovedProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
26,608us-gaap_CapitalizedCostsUnprovedProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
Capitalized costs, gross |
0us-gaap_CapitalizedCostsOilAndGasProducingActivitiesGross / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
118,682us-gaap_CapitalizedCostsOilAndGasProducingActivitiesGross / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
Accumulated depreciation, depletion, amortization and impairment reserve |
0us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
(15,180)us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
Net capitalized costs |
0us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
103,502us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_DiamondbackEnergyIncMember |
Grizzly Oil Sands ULC [Member] | ||
Reserve Quantities [Line Items] | ||
Proven properties |
96,859us-gaap_CapitalizedCostsProvedProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
0us-gaap_CapitalizedCostsProvedProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
Unproven properties |
103,160us-gaap_CapitalizedCostsUnprovedProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
0us-gaap_CapitalizedCostsUnprovedProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
Capitalized costs, gross |
200,019us-gaap_CapitalizedCostsOilAndGasProducingActivitiesGross / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
0us-gaap_CapitalizedCostsOilAndGasProducingActivitiesGross / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
Accumulated depreciation, depletion, amortization and impairment reserve |
(1,248)us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
0us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
Net capitalized costs |
$ 198,771us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
$ 0us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gpor_GrizzlyOilSandsUlcMember |
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- Definition
Amount of accumulated depreciation, depletion, amortization and valuation allowance relating to oil and gas producing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The sum of capitalized costs relating to oil and gas producing activities before accounting for accumulated depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Net amount of capitalized costs relating to oil and gas producing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Capitalized costs of unproved properties incurred for any combination mineral interests acquisitions and other costs not previously disclosed within this table. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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