Condensed Consolidating Financial Information - Condensed Consolidating Statement of Operations (Details) (USD $) In Thousands, unless otherwise specified
|
3 Months Ended |
12 Months Ended |
Dec. 31, 2014
|
Sep. 30, 2014
|
Jun. 30, 2014
|
Mar. 31, 2014
|
Dec. 31, 2013
|
Sep. 30, 2013
|
Jun. 30, 2013
|
Mar. 31, 2013
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Revenues: |
|
|
|
|
|
|
|
|
|
|
|
Total revenues |
$ 267,697us-gaap_Revenues
|
$ 170,804us-gaap_Revenues
|
$ 114,736us-gaap_Revenues
|
$ 118,029us-gaap_Revenues
|
$ 68,067us-gaap_Revenues
|
$ 69,252us-gaap_Revenues
|
$ 70,434us-gaap_Revenues
|
$ 55,000us-gaap_Revenues
|
$ 671,266us-gaap_Revenues
|
$ 262,753us-gaap_Revenues
|
$ 248,926us-gaap_Revenues
|
Costs and expenses: |
|
|
|
|
|
|
|
|
|
|
|
Lease operating expenses |
|
|
|
|
|
|
|
|
52,191us-gaap_LeaseOperatingExpense
|
26,703us-gaap_LeaseOperatingExpense
|
24,308us-gaap_LeaseOperatingExpense
|
Production taxes |
|
|
|
|
|
|
|
|
24,006us-gaap_TaxesExcludingIncomeAndExciseTaxes
|
26,933us-gaap_TaxesExcludingIncomeAndExciseTaxes
|
28,957us-gaap_TaxesExcludingIncomeAndExciseTaxes
|
Midstream gathering and processing |
|
|
|
|
|
|
|
|
64,467us-gaap_GasGatheringTransportationMarketingAndProcessingCosts
|
11,030us-gaap_GasGatheringTransportationMarketingAndProcessingCosts
|
443us-gaap_GasGatheringTransportationMarketingAndProcessingCosts
|
Depreciation, depletion and amortization |
|
|
|
|
|
|
|
|
265,431us-gaap_DepreciationDepletionAndAmortization
|
118,880us-gaap_DepreciationDepletionAndAmortization
|
90,749us-gaap_DepreciationDepletionAndAmortization
|
General and administrative |
|
|
|
|
|
|
|
|
38,290us-gaap_GeneralAndAdministrativeExpense
|
22,519us-gaap_GeneralAndAdministrativeExpense
|
13,808us-gaap_GeneralAndAdministrativeExpense
|
(Gain) loss on sale of assets |
|
|
|
|
|
|
|
|
(11)us-gaap_GainLossOnSaleOfOilAndGasProperty
|
508us-gaap_GainLossOnSaleOfOilAndGasProperty
|
(7,300)us-gaap_GainLossOnSaleOfOilAndGasProperty
|
Accretion expense |
|
|
|
|
|
|
|
|
761us-gaap_AssetRetirementObligationAccretionExpense
|
717us-gaap_AssetRetirementObligationAccretionExpense
|
698us-gaap_AssetRetirementObligationAccretionExpense
|
Total costs and expenses |
|
|
|
|
|
|
|
|
445,135us-gaap_OperatingExpenses
|
207,290us-gaap_OperatingExpenses
|
151,663us-gaap_OperatingExpenses
|
INCOME FROM OPERATIONS |
129,458us-gaap_OperatingIncomeLoss
|
53,454us-gaap_OperatingIncomeLoss
|
18,110us-gaap_OperatingIncomeLoss
|
25,109us-gaap_OperatingIncomeLoss
|
2,926us-gaap_OperatingIncomeLoss
|
15,137us-gaap_OperatingIncomeLoss
|
22,456us-gaap_OperatingIncomeLoss
|
14,944us-gaap_OperatingIncomeLoss
|
226,131us-gaap_OperatingIncomeLoss
|
55,463us-gaap_OperatingIncomeLoss
|
97,263us-gaap_OperatingIncomeLoss
|
OTHER (INCOME) EXPENSE: |
|
|
|
|
|
|
|
|
|
|
|
Interest expense |
|
|
|
|
|
|
|
|
23,986us-gaap_InterestExpense
|
17,490us-gaap_InterestExpense
|
7,458us-gaap_InterestExpense
|
Interest income |
|
|
|
|
|
|
|
|
(195)us-gaap_InvestmentIncomeInterest
|
(297)us-gaap_InvestmentIncomeInterest
|
(72)us-gaap_InvestmentIncomeInterest
|
Litigation settlement |
|
|
|
|
|
|
|
|
25,500us-gaap_LitigationSettlementExpense
|
0us-gaap_LitigationSettlementExpense
|
0us-gaap_LitigationSettlementExpense
|
Gain on contribution of investments |
|
|
|
|
|
|
|
|
(84,470)us-gaap_GainLossOnInvestments
|
0us-gaap_GainLossOnInvestments
|
0us-gaap_GainLossOnInvestments
|
Income from equity method investments |
|
|
|
|
|
|
|
|
(139,434)gpor_IncomeLossfromEquityMethodInvestmentsandInvestmentsinSubsidiaries
|
(213,058)gpor_IncomeLossfromEquityMethodInvestmentsandInvestmentsinSubsidiaries
|
(8,322)gpor_IncomeLossfromEquityMethodInvestmentsandInvestmentsinSubsidiaries
|
Total Other (Income) Expense |
|
|
|
|
|
|
|
|
(174,613)us-gaap_NonoperatingIncomeExpense
|
(195,865)us-gaap_NonoperatingIncomeExpense
|
(936)us-gaap_NonoperatingIncomeExpense
|
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES |
|
|
|
|
|
|
|
|
400,744us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
|
251,328us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
|
98,199us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
|
INCOME TAX EXPENSE |
67,757us-gaap_IncomeTaxExpenseBenefit
|
4,876us-gaap_IncomeTaxExpenseBenefit
|
31,461us-gaap_IncomeTaxExpenseBenefit
|
49,247us-gaap_IncomeTaxExpenseBenefit
|
21,027us-gaap_IncomeTaxExpenseBenefit
|
23,400us-gaap_IncomeTaxExpenseBenefit
|
25,514us-gaap_IncomeTaxExpenseBenefit
|
28,195us-gaap_IncomeTaxExpenseBenefit
|
153,341us-gaap_IncomeTaxExpenseBenefit
|
98,136us-gaap_IncomeTaxExpenseBenefit
|
26,363us-gaap_IncomeTaxExpenseBenefit
|
INCOME FROM CONTINUING OPERATIONS |
|
|
|
|
|
|
|
|
247,403us-gaap_IncomeLossFromContinuingOperations
|
153,192us-gaap_IncomeLossFromContinuingOperations
|
71,836us-gaap_IncomeLossFromContinuingOperations
|
Loss on disposal of Belize properties, net of tax |
|
|
|
|
|
|
|
|
0us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
|
0us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
|
3,465us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
|
NET INCOME |
110,073us-gaap_NetIncomeLoss
|
6,920us-gaap_NetIncomeLoss
|
47,852us-gaap_NetIncomeLoss
|
82,558us-gaap_NetIncomeLoss
|
24,278us-gaap_NetIncomeLoss
|
40,527us-gaap_NetIncomeLoss
|
43,828us-gaap_NetIncomeLoss
|
44,559us-gaap_NetIncomeLoss
|
247,403us-gaap_NetIncomeLoss
|
153,192us-gaap_NetIncomeLoss
|
68,371us-gaap_NetIncomeLoss
|
Parent [Member] |
|
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|
|
|
|
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|
|
|
Revenues: |
|
|
|
|
|
|
|
|
|
|
|
Total revenues |
|
|
|
|
|
|
|
|
669,067us-gaap_Revenues / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
261,809us-gaap_Revenues / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
247,637us-gaap_Revenues / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
Costs and expenses: |
|
|
|
|
|
|
|
|
|
|
|
Lease operating expenses |
|
|
|
|
|
|
|
|
51,238us-gaap_LeaseOperatingExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
25,971us-gaap_LeaseOperatingExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
23,644us-gaap_LeaseOperatingExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
Production taxes |
|
|
|
|
|
|
|
|
23,803us-gaap_TaxesExcludingIncomeAndExciseTaxes / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
26,848us-gaap_TaxesExcludingIncomeAndExciseTaxes / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
28,874us-gaap_TaxesExcludingIncomeAndExciseTaxes / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
Midstream gathering and processing |
|
|
|
|
|
|
|
|
64,402us-gaap_GasGatheringTransportationMarketingAndProcessingCosts / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
10,999us-gaap_GasGatheringTransportationMarketingAndProcessingCosts / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
432us-gaap_GasGatheringTransportationMarketingAndProcessingCosts / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
Depreciation, depletion and amortization |
|
|
|
|
|
|
|
|
265,428us-gaap_DepreciationDepletionAndAmortization / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
118,878us-gaap_DepreciationDepletionAndAmortization / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
90,749us-gaap_DepreciationDepletionAndAmortization / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
General and administrative |
|
|
|
|
|
|
|
|
37,846us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
22,359us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
13,602us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
(Gain) loss on sale of assets |
|
|
|
|
|
|
|
|
(11)us-gaap_GainLossOnSaleOfOilAndGasProperty / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
508us-gaap_GainLossOnSaleOfOilAndGasProperty / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
(7,300)us-gaap_GainLossOnSaleOfOilAndGasProperty / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
Accretion expense |
|
|
|
|
|
|
|
|
761us-gaap_AssetRetirementObligationAccretionExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
717us-gaap_AssetRetirementObligationAccretionExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
698us-gaap_AssetRetirementObligationAccretionExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
Total costs and expenses |
|
|
|
|
|
|
|
|
443,467us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
206,280us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
150,699us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
INCOME FROM OPERATIONS |
|
|
|
|
|
|
|
|
225,600us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
55,529us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
96,938us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
OTHER (INCOME) EXPENSE: |
|
|
|
|
|
|
|
|
|
|
|
Interest expense |
|
|
|
|
|
|
|
|
23,986us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
17,490us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
7,458us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
Interest income |
|
|
|
|
|
|
|
|
(195)us-gaap_InvestmentIncomeInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
(297)us-gaap_InvestmentIncomeInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
(72)us-gaap_InvestmentIncomeInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
Litigation settlement |
|
|
|
|
|
|
|
|
25,500us-gaap_LitigationSettlementExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
|
|
Gain on contribution of investments |
|
|
|
|
|
|
|
|
(84,470)us-gaap_GainLossOnInvestments / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
|
|
Income from equity method investments |
|
|
|
|
|
|
|
|
(139,965)gpor_IncomeLossfromEquityMethodInvestmentsandInvestmentsinSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
(212,992)gpor_IncomeLossfromEquityMethodInvestmentsandInvestmentsinSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
(5,182)gpor_IncomeLossfromEquityMethodInvestmentsandInvestmentsinSubsidiaries / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
Total Other (Income) Expense |
|
|
|
|
|
|
|
|
(175,144)us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
(195,799)us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
2,204us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES |
|
|
|
|
|
|
|
|
400,744us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
251,328us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
94,734us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
INCOME TAX EXPENSE |
|
|
|
|
|
|
|
|
153,341us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
98,136us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
26,363us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
INCOME FROM CONTINUING OPERATIONS |
|
|
|
|
|
|
|
|
|
|
68,371us-gaap_IncomeLossFromContinuingOperations / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
Loss on disposal of Belize properties, net of tax |
|
|
|
|
|
|
|
|
|
|
0us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
NET INCOME |
|
|
|
|
|
|
|
|
247,403us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
153,192us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
68,371us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
|
Guarantor [Member] |
|
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|
|
|
|
|
|
|
|
Revenues: |
|
|
|
|
|
|
|
|
|
|
|
Total revenues |
|
|
|
|
|
|
|
|
2,199us-gaap_Revenues / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
1,517us-gaap_Revenues / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
1,289us-gaap_Revenues / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
Costs and expenses: |
|
|
|
|
|
|
|
|
|
|
|
Lease operating expenses |
|
|
|
|
|
|
|
|
953us-gaap_LeaseOperatingExpense / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
732us-gaap_LeaseOperatingExpense / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
664us-gaap_LeaseOperatingExpense / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
Production taxes |
|
|
|
|
|
|
|
|
203us-gaap_TaxesExcludingIncomeAndExciseTaxes / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
85us-gaap_TaxesExcludingIncomeAndExciseTaxes / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
83us-gaap_TaxesExcludingIncomeAndExciseTaxes / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
Midstream gathering and processing |
|
|
|
|
|
|
|
|
65us-gaap_GasGatheringTransportationMarketingAndProcessingCosts / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
31us-gaap_GasGatheringTransportationMarketingAndProcessingCosts / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
11us-gaap_GasGatheringTransportationMarketingAndProcessingCosts / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
Depreciation, depletion and amortization |
|
|
|
|
|
|
|
|
3us-gaap_DepreciationDepletionAndAmortization / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
2us-gaap_DepreciationDepletionAndAmortization / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
0us-gaap_DepreciationDepletionAndAmortization / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
General and administrative |
|
|
|
|
|
|
|
|
446us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
159us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
132us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
(Gain) loss on sale of assets |
|
|
|
|
|
|
|
|
0us-gaap_GainLossOnSaleOfOilAndGasProperty / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
0us-gaap_GainLossOnSaleOfOilAndGasProperty / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
0us-gaap_GainLossOnSaleOfOilAndGasProperty / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
Accretion expense |
|
|
|
|
|
|
|
|
0us-gaap_AssetRetirementObligationAccretionExpense / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
0us-gaap_AssetRetirementObligationAccretionExpense / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
0us-gaap_AssetRetirementObligationAccretionExpense / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
Total costs and expenses |
|
|
|
|
|
|
|
|
1,670us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
1,009us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
890us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
INCOME FROM OPERATIONS |
|
|
|
|
|
|
|
|
529us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
508us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
399us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
OTHER (INCOME) EXPENSE: |
|
|
|
|
|
|
|
|
|
|
|
Interest expense |
|
|
|
|
|
|
|
|
0us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
0us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
0us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
Interest income |
|
|
|
|
|
|
|
|
0us-gaap_InvestmentIncomeInterest / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
0us-gaap_InvestmentIncomeInterest / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
0us-gaap_InvestmentIncomeInterest / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
Litigation settlement |
|
|
|
|
|
|
|
|
0us-gaap_LitigationSettlementExpense / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
|
|
Gain on contribution of investments |
|
|
|
|
|
|
|
|
0us-gaap_GainLossOnInvestments / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
|
|
Income from equity method investments |
|
|
|
|
|
|
|
|
0gpor_IncomeLossfromEquityMethodInvestmentsandInvestmentsinSubsidiaries / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
0gpor_IncomeLossfromEquityMethodInvestmentsandInvestmentsinSubsidiaries / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
0gpor_IncomeLossfromEquityMethodInvestmentsandInvestmentsinSubsidiaries / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
Total Other (Income) Expense |
|
|
|
|
|
|
|
|
0us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
0us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
0us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES |
|
|
|
|
|
|
|
|
529us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
508us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
399us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
INCOME TAX EXPENSE |
|
|
|
|
|
|
|
|
0us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
0us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
0us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
INCOME FROM CONTINUING OPERATIONS |
|
|
|
|
|
|
|
|
|
|
399us-gaap_IncomeLossFromContinuingOperations / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
Loss on disposal of Belize properties, net of tax |
|
|
|
|
|
|
|
|
|
|
3,465us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
NET INCOME |
|
|
|
|
|
|
|
|
529us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
508us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
(3,066)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
|
Non-Guarantor [Member] |
|
|
|
|
|
|
|
|
|
|
|
Revenues: |
|
|
|
|
|
|
|
|
|
|
|
Total revenues |
|
|
|
|
|
|
|
|
0us-gaap_Revenues / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_Revenues / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_Revenues / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
Costs and expenses: |
|
|
|
|
|
|
|
|
|
|
|
Lease operating expenses |
|
|
|
|
|
|
|
|
0us-gaap_LeaseOperatingExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_LeaseOperatingExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_LeaseOperatingExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
Production taxes |
|
|
|
|
|
|
|
|
0us-gaap_TaxesExcludingIncomeAndExciseTaxes / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_TaxesExcludingIncomeAndExciseTaxes / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_TaxesExcludingIncomeAndExciseTaxes / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
Midstream gathering and processing |
|
|
|
|
|
|
|
|
0us-gaap_GasGatheringTransportationMarketingAndProcessingCosts / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_GasGatheringTransportationMarketingAndProcessingCosts / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_GasGatheringTransportationMarketingAndProcessingCosts / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
Depreciation, depletion and amortization |
|
|
|
|
|
|
|
|
0us-gaap_DepreciationDepletionAndAmortization / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_DepreciationDepletionAndAmortization / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_DepreciationDepletionAndAmortization / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
General and administrative |
|
|
|
|
|
|
|
|
(2)us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
1us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
74us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
(Gain) loss on sale of assets |
|
|
|
|
|
|
|
|
0us-gaap_GainLossOnSaleOfOilAndGasProperty / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_GainLossOnSaleOfOilAndGasProperty / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_GainLossOnSaleOfOilAndGasProperty / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
Accretion expense |
|
|
|
|
|
|
|
|
0us-gaap_AssetRetirementObligationAccretionExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_AssetRetirementObligationAccretionExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_AssetRetirementObligationAccretionExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
Total costs and expenses |
|
|
|
|
|
|
|
|
(2)us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
1us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
74us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
INCOME FROM OPERATIONS |
|
|
|
|
|
|
|
|
2us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
(1)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
(74)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
OTHER (INCOME) EXPENSE: |
|
|
|
|
|
|
|
|
|
|
|
Interest expense |
|
|
|
|
|
|
|
|
0us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
Interest income |
|
|
|
|
|
|
|
|
0us-gaap_InvestmentIncomeInterest / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_InvestmentIncomeInterest / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_InvestmentIncomeInterest / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
Litigation settlement |
|
|
|
|
|
|
|
|
0us-gaap_LitigationSettlementExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
|
|
Gain on contribution of investments |
|
|
|
|
|
|
|
|
0us-gaap_GainLossOnInvestments / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
|
|
Income from equity method investments |
|
|
|
|
|
|
|
|
13,159gpor_IncomeLossfromEquityMethodInvestmentsandInvestmentsinSubsidiaries / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
2,999gpor_IncomeLossfromEquityMethodInvestmentsandInvestmentsinSubsidiaries / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
1,512gpor_IncomeLossfromEquityMethodInvestmentsandInvestmentsinSubsidiaries / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
Total Other (Income) Expense |
|
|
|
|
|
|
|
|
13,159us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
2,999us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
1,512us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES |
|
|
|
|
|
|
|
|
(13,157)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
(3,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
(1,586)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
INCOME TAX EXPENSE |
|
|
|
|
|
|
|
|
0us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
0us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
INCOME FROM CONTINUING OPERATIONS |
|
|
|
|
|
|
|
|
|
|
(1,586)us-gaap_IncomeLossFromContinuingOperations / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
Loss on disposal of Belize properties, net of tax |
|
|
|
|
|
|
|
|
|
|
0us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
NET INCOME |
|
|
|
|
|
|
|
|
(13,157)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
(3,000)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
(1,586)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
|
Eliminations [Member] |
|
|
|
|
|
|
|
|
|
|
|
Revenues: |
|
|
|
|
|
|
|
|
|
|
|
Total revenues |
|
|
|
|
|
|
|
|
0us-gaap_Revenues / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
(573)us-gaap_Revenues / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_Revenues / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
Costs and expenses: |
|
|
|
|
|
|
|
|
|
|
|
Lease operating expenses |
|
|
|
|
|
|
|
|
0us-gaap_LeaseOperatingExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_LeaseOperatingExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_LeaseOperatingExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
Production taxes |
|
|
|
|
|
|
|
|
0us-gaap_TaxesExcludingIncomeAndExciseTaxes / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_TaxesExcludingIncomeAndExciseTaxes / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_TaxesExcludingIncomeAndExciseTaxes / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
Midstream gathering and processing |
|
|
|
|
|
|
|
|
0us-gaap_GasGatheringTransportationMarketingAndProcessingCosts / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_GasGatheringTransportationMarketingAndProcessingCosts / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_GasGatheringTransportationMarketingAndProcessingCosts / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
Depreciation, depletion and amortization |
|
|
|
|
|
|
|
|
0us-gaap_DepreciationDepletionAndAmortization / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_DepreciationDepletionAndAmortization / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_DepreciationDepletionAndAmortization / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
General and administrative |
|
|
|
|
|
|
|
|
0us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_GeneralAndAdministrativeExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
(Gain) loss on sale of assets |
|
|
|
|
|
|
|
|
0us-gaap_GainLossOnSaleOfOilAndGasProperty / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_GainLossOnSaleOfOilAndGasProperty / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_GainLossOnSaleOfOilAndGasProperty / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
Accretion expense |
|
|
|
|
|
|
|
|
0us-gaap_AssetRetirementObligationAccretionExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_AssetRetirementObligationAccretionExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_AssetRetirementObligationAccretionExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
Total costs and expenses |
|
|
|
|
|
|
|
|
0us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_OperatingExpenses / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
INCOME FROM OPERATIONS |
|
|
|
|
|
|
|
|
0us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
(573)us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_OperatingIncomeLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
OTHER (INCOME) EXPENSE: |
|
|
|
|
|
|
|
|
|
|
|
Interest expense |
|
|
|
|
|
|
|
|
0us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_InterestExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
Interest income |
|
|
|
|
|
|
|
|
0us-gaap_InvestmentIncomeInterest / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_InvestmentIncomeInterest / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_InvestmentIncomeInterest / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
Litigation settlement |
|
|
|
|
|
|
|
|
0us-gaap_LitigationSettlementExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
|
|
Gain on contribution of investments |
|
|
|
|
|
|
|
|
0us-gaap_GainLossOnInvestments / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
|
|
Income from equity method investments |
|
|
|
|
|
|
|
|
(12,628)gpor_IncomeLossfromEquityMethodInvestmentsandInvestmentsinSubsidiaries / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
(3,065)gpor_IncomeLossfromEquityMethodInvestmentsandInvestmentsinSubsidiaries / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
(4,652)gpor_IncomeLossfromEquityMethodInvestmentsandInvestmentsinSubsidiaries / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
Total Other (Income) Expense |
|
|
|
|
|
|
|
|
(12,628)us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
(3,065)us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
(4,652)us-gaap_NonoperatingIncomeExpense / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES |
|
|
|
|
|
|
|
|
12,628us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
2,492us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
4,652us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
INCOME TAX EXPENSE |
|
|
|
|
|
|
|
|
0us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
0us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
INCOME FROM CONTINUING OPERATIONS |
|
|
|
|
|
|
|
|
|
|
4,652us-gaap_IncomeLossFromContinuingOperations / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
Loss on disposal of Belize properties, net of tax |
|
|
|
|
|
|
|
|
|
|
0us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
NET INCOME |
|
|
|
|
|
|
|
|
$ 12,628us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
$ 2,492us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|
$ 4,652us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
|