Acquisitions - Fair Value of Assets Acquired (Details) (Utica Shale [Member], USD $)
In Thousands, unless otherwise specified |
0 Months Ended | 12 Months Ended | |
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Mar. 20, 2014
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Dec. 31, 2014
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Mar. 20, 2014
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Business Acquisition [Line Items] | |||
Cash, net of purchase price adjustments | $ 179,527gpor_PaymenttoAcquireOilandGasPropertyandEquipmentNet | $ 179,500gpor_PaymenttoAcquireOilandGasPropertyandEquipmentNet | |
Fair value of net identifiable assets acquired | 179,527us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment | 179,527us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment | |
Proved Properties [Member] | |||
Business Acquisition [Line Items] | |||
Fair value of net identifiable assets acquired |
31,961us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = gpor_UticaShaleMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gpor_ProvedPropertiesMember |
31,961us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = gpor_UticaShaleMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gpor_ProvedPropertiesMember |
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Unproved Properties [Member] | |||
Business Acquisition [Line Items] | |||
Fair value of net identifiable assets acquired |
6,263us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = gpor_UticaShaleMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gpor_UnprovedPropertiesMember |
6,263us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = gpor_UticaShaleMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gpor_UnprovedPropertiesMember |
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Unevaluated Properties [Member] | |||
Business Acquisition [Line Items] | |||
Fair value of net identifiable assets acquired |
$ 141,303us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = gpor_UticaShaleMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gpor_UnevaluatedPropertiesMember |
$ 141,303us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = gpor_UticaShaleMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gpor_UnevaluatedPropertiesMember |
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Payment to Acquire Oil and Gas Property and Equipment, Net No definition available.
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- Definition
The amount of property, plant, and equipment recognized as of the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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