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v2.4.1.9

Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Current assets: |  |
Cash and cash equivalents | $ 142,340 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 458,956 us-gaap_CashAndCashEquivalentsAtCarryingValue
Accounts receivable—oil and gas | 103,858 us-gaap_AccountsReceivableNetCurrent | 58,824 us-gaap_AccountsReceivableNetCurrent
Accounts receivable—related parties | 46 us-gaap_DueFromRelatedPartiesCurrent | 2,617 us-gaap_DueFromRelatedPartiesCurrent
Prepaid expenses and other current assets | 3,714 us-gaap_PrepaidExpenseAndOtherAssetsCurrent | 2,581 us-gaap_PrepaidExpenseAndOtherAssetsCurrent
Deferred tax asset | 0 us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent | 6,927 us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent
Short-term derivative instruments | 78,391 us-gaap_DerivativeAssetsCurrent | 324 us-gaap_DerivativeAssetsCurrent
Note receivable - related party | 0 us-gaap_NotesReceivableRelatedPartiesCurrent | 875 us-gaap_NotesReceivableRelatedPartiesCurrent
Total current assets | 328,349 us-gaap_AssetsCurrent | 531,104 us-gaap_AssetsCurrent
Property and equipment: |  |
Oil and natural gas properties, full-cost accounting, $1,465,538 and $1,020,835 excluded from amortization in 2014 and 2013, respectively | 3,923,154 us-gaap_OilAndGasPropertyFullCostMethodGross | 2,477,178 us-gaap_OilAndGasPropertyFullCostMethodGross
Other property and equipment | 18,344 us-gaap_PropertyPlantAndEquipmentOther | 11,131 us-gaap_PropertyPlantAndEquipmentOther
Accumulated depletion, depreciation, amortization and impairment | (1,050,879)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | (784,717)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property and equipment, net | 2,890,619 us-gaap_PropertyPlantAndEquipmentNet | 1,703,592 us-gaap_PropertyPlantAndEquipmentNet
Other assets: |  |
Equity investments ($0 and $178,708 attributable to fair value option in 2014 and 2013, respectively) | 369,581 us-gaap_EquityMethodInvestments | 440,068 us-gaap_EquityMethodInvestments
Derivative instruments | 24,448 us-gaap_DerivativeInstrumentsAndHedgesNoncurrent | 521 us-gaap_DerivativeInstrumentsAndHedgesNoncurrent
Other assets | 19,396 us-gaap_OtherAssetsNoncurrent | 17,851 us-gaap_OtherAssetsNoncurrent
Total other assets | 413,425 gpor_TotalOtherAssets | 458,440 gpor_TotalOtherAssets
Total assets | 3,632,393 us-gaap_Assets | 2,693,136 us-gaap_Assets
Current liabilities: |  |
Accounts payable and accrued liabilities | 371,410 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent | 190,707 us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent
Asset retirement obligation—current | 75 us-gaap_AssetRetirementObligationCurrent | 795 us-gaap_AssetRetirementObligationCurrent
Short-term derivative instruments | 0 us-gaap_DerivativeLiabilitiesCurrent | 12,280 us-gaap_DerivativeLiabilitiesCurrent
Deferred tax liability | 27,070 us-gaap_DeferredTaxLiabilitiesCurrent | 0 us-gaap_DeferredTaxLiabilitiesCurrent
Current maturities of long-term debt | 168 us-gaap_LongTermDebtCurrent | 159 us-gaap_LongTermDebtCurrent
Total current liabilities | 398,723 us-gaap_LiabilitiesCurrent | 203,941 us-gaap_LiabilitiesCurrent
Long-term derivative instrument | 0 us-gaap_DerivativeLiabilitiesNoncurrent | 11,366 us-gaap_DerivativeLiabilitiesNoncurrent
Asset retirement obligation—long-term | 17,863 us-gaap_AssetRetirementObligationsNoncurrent | 14,288 us-gaap_AssetRetirementObligationsNoncurrent
Deferred tax liability | 203,195 us-gaap_DeferredTaxLiabilitiesGrossNoncurrent | 114,275 us-gaap_DeferredTaxLiabilitiesGrossNoncurrent
Long-term debt, net of current maturities | 716,316 us-gaap_LongTermDebtNoncurrent | 299,028 us-gaap_LongTermDebtNoncurrent
Total liabilities | 1,336,097 us-gaap_Liabilities | 642,898 us-gaap_Liabilities
Commitments and contingencies (Notes 16 and 17) |  |
Preferred stock, $.01 par value; 5,000,000 authorized, 30,000 authorized as redeemable 12% cumulative preferred stock, Series A; 0 issued and outstanding | 0 us-gaap_PreferredStockValue | 0 us-gaap_PreferredStockValue
Stockholders’ equity: |  |
Common stock - $.01 par value, 200,000,000 authorized, 85,655,438 issued and outstanding in 2014 and 85,177,532 in 2013 | 856 us-gaap_CommonStockValue | 851 us-gaap_CommonStockValue
Paid-in capital | 1,828,602 us-gaap_AdditionalPaidInCapital | 1,813,058 us-gaap_AdditionalPaidInCapital
Accumulated other comprehensive loss | (26,675)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax | (9,781)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Retained earnings | 493,513 us-gaap_RetainedEarningsAccumulatedDeficit | 246,110 us-gaap_RetainedEarningsAccumulatedDeficit
Total stockholders’ equity | 2,296,296 us-gaap_StockholdersEquity | 2,050,238 us-gaap_StockholdersEquity
Total liabilities and stockholders’ equity | $ 3,632,393 us-gaap_LiabilitiesAndStockholdersEquity | $ 2,693,136 us-gaap_LiabilitiesAndStockholdersEquity

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