$GPOR
GULFPORT ENERGY CORP Stock $gpor

$gpor Overview Financials Valuation SEC Filings Company Website

2012 Q4 Form 10-K Financial Statement

#000144530513000396 Filed on March 01, 2013

Income Statement

Concept	2012 Q4	2012	2011 Q4
Revenue	$56.60M	$248.9M	$68.95M
YoY Change	-17.9%	8.58%	81.44%
Cost Of Revenue	$12.70M	$53.30M	$13.60M
YoY Change	-6.62%	13.4%	51.11%
Gross Profit	$44.00M	$195.7M	$55.30M
YoY Change	-20.43%	7.35%	90.69%
Gross Profit Margin	77.73%	78.62%	80.21%
Selling, General & Admin	$4.900M	$14.30M	$1.900M
YoY Change	157.89%	70.24%	18.75%
% of Gross Profit	11.14%	7.31%	3.44%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$20.30M	$90.75M	$21.70M
YoY Change	-6.45%	45.62%	80.83%
% of Gross Profit	46.14%	46.37%	39.24%
Operating Expenses	$25.30M	$151.7M	$23.80M
YoY Change	6.3%	28.21%	72.46%
Operating Profit	$25.88M	$97.26M	$31.59M
YoY Change	-18.08%	-12.35%	107.8%
Interest Expense	$4.300M	$7.458M	-$700.0K
YoY Change	-714.29%	432.71%	-30.0%
% of Operating Profit	16.62%	7.67%	-2.22%
Other Income/Expense, Net		$936.0K
YoY Change		-135.56%
Pretax Income	$30.20M	$98.20M	$30.90M
YoY Change	-2.27%	-9.35%	116.08%
Income Tax	$10.85M	$26.36M	-$91.00K
% Of Pretax Income	35.92%	26.85%	-0.29%
Net Earnings	$15.88M	$68.37M	$30.97M
YoY Change	-48.72%	-36.94%	116.6%
Net Earnings / Revenue	28.06%	27.47%	44.93%
Basic Earnings Per Share	$0.28	$1.22	$0.59
Diluted Earnings Per Share	$0.28	$1.21	$0.59
COMMON SHARES
Basic Shares Outstanding	55.72M shares	55.93M shares
Diluted Shares Outstanding		56.42M shares

Balance Sheet

Concept	2012 Q4	2012	2011 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$167.1M	$167.1M	$93.90M
YoY Change	77.96%	77.96%	3656.0%
Cash & Equivalents	$167.1M	$167.1M	$93.90M
Short-Term Investments
Other Short-Term Assets	$2.200M	$2.200M	$2.900M
YoY Change	-24.14%	-24.14%	70.59%
Inventory
Prepaid Expenses
Receivables	$25.62M	$60.50M	$28.02M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$229.7M	$229.7M	$129.6M
YoY Change	77.29%	77.24%	557.74%
LONG-TERM ASSETS
Property, Plant & Equipment	$953.9M	$953.9M	$468.6M
YoY Change	103.54%	103.56%	93.57%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$381.5M	$381.5M	$86.82M
YoY Change	339.38%	339.52%	163.1%
Other Assets	$13.30M	$13.30M	$5.123M
YoY Change	159.52%	118.03%	6.73%
Total Long-Term Assets	$1.349B	$1.349B	$561.6M
YoY Change	140.15%	140.15%	87.19%
TOTAL ASSETS
Total Short-Term Assets	$229.7M	$229.7M	$129.6M
Total Long-Term Assets	$1.349B	$1.349B	$561.6M
Total Assets	$1.578B	$1.578B	$691.2M
YoY Change	128.37%	128.36%	116.19%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$110.2M	$110.2M	$43.90M
YoY Change	151.03%	151.03%	6.55%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$150.0K	$200.0K	$141.0K
YoY Change	6.38%	100.0%	-94.13%
Total Short-Term Liabilities	$120.9M	$120.9M	$44.63M
YoY Change	170.87%	171.08%	-8.73%
LONG-TERM LIABILITIES
Long-Term Debt	$298.9M	$298.9M	$2.142M
YoY Change	13853.69%	14133.33%	-95.67%
Other Long-Term Liabilities	$354.0K	$13.60M	$0.00
YoY Change		13.33%	-100.0%
Total Long-Term Liabilities	$299.2M	$312.5M	$2.142M
YoY Change	13870.21%	2116.31%	-96.41%
TOTAL LIABILITIES
Total Short-Term Liabilities	$120.9M	$120.9M	$44.63M
Total Long-Term Liabilities	$299.2M	$312.5M	$2.142M
Total Liabilities	$452.0M	$452.0M	$58.81M
YoY Change	668.53%	668.71%	-45.85%
SHAREHOLDERS EQUITY
Retained Earnings	$92.92M		$24.55M
YoY Change	278.53%
Common Stock	$674.0K		$556.0K
YoY Change	21.22%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.126B	$1.126B	$632.4M
YoY Change
Total Liabilities & Shareholders Equity	$1.578B	$1.578B	$691.2M
YoY Change	128.37%	128.36%	116.19%

Cashflow Statement

Concept	2012 Q4	2012	2011 Q4
OPERATING ACTIVITIES
Net Income	$15.88M	$68.37M	$30.97M
YoY Change	-48.72%	-36.94%	116.6%
Depreciation, Depletion And Amortization	$20.30M	$90.75M	$21.70M
YoY Change	-6.45%	45.62%	80.83%
Cash From Operating Activities	$33.30M	$199.2M	$36.10M
YoY Change	-7.76%	25.94%	30.8%
INVESTING ACTIVITIES
Capital Expenditures	-$488.0M	-$757.8M	-$85.40M
YoY Change	471.43%	163.4%	189.49%
Acquisitions
YoY Change
Other Investing Activities	$35.40M	-$82.70M	-$7.600M
YoY Change	-565.79%	132.96%	1166.67%
Cash From Investing Activities	-$452.7M	-$840.6M	-$93.00M
YoY Change	386.77%	160.04%	208.97%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$427.9M	$427.1M
YoY Change		39.05%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	574.2M	$714.6M	128.1M
YoY Change	348.24%	178.56%	4317.24%
NET CHANGE
Cash From Operating Activities	33.30M	$199.2M	36.10M
Cash From Investing Activities	-452.7M	-$840.6M	-93.00M
Cash From Financing Activities	574.2M	$714.6M	128.1M
Net Change In Cash	154.8M	$73.19M	71.20M
YoY Change	117.42%	-19.95%	17700.0%
FREE CASH FLOW
Cash From Operating Activities	$33.30M	$199.2M	$36.10M
Capital Expenditures	-$488.0M	-$757.8M	-$85.40M
Free Cash Flow	$521.3M	$957.0M	$121.5M
YoY Change	329.05%	114.64%	112.78%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2012Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	110244000	USD
CY2011Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	43872000	USD
CY2012Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	25615000	USD
CY2011Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	28019000	USD
CY2012	us-gaap	Accretion Of Discount AccretionOfDiscount	37668000	USD
CY2011	us-gaap	Accretion Of Discount AccretionOfDiscount	31549000	USD
CY2010	us-gaap	Accretion Of Discount AccretionOfDiscount	24077000	USD
CY2011Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	575142000	USD
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	665884000	USD
CY2010Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-4720000	USD
CY2009Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-18736000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-9660000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	1576000	USD
CY2010Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	2952000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	1087000	USD
CY2009Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	696000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	2442000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	2663000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-3429000	USD
CY2011	us-gaap	Acquisition Costs AcquisitionCosts	112591000	USD
	us-gaap	Acquisition Costs AcquisitionCosts	407000	USD
CY2010	us-gaap	Acquisition Costs AcquisitionCosts	661000	USD
CY2012	us-gaap	Acquisition Costs AcquisitionCosts	512636000	USD
CY2012Q4	us-gaap	Acquisition Costs Cumulative AcquisitionCostsCumulative	626295000	USD
CY2011Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	604584000	USD
CY2012Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1036245000	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	492000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1287000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4688000	USD
CY2012	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4688000	USD
CY2010	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	492000	USD
CY2011	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1287000	USD
CY2012	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	59000	USD
CY2010	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	0	USD
CY2011	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	0	USD
CY2011	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	540000	USD
CY2012	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	640000	USD
CY2010	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	0	USD
CY2010	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
CY2012	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
CY2011	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
CY2011Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	12653000	USD
CY2010Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	10845000	USD
CY2012Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	13275000	USD
CY2011	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	666000	USD
CY2012	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	698000	USD
CY2010	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	617000	USD
CY2012Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	60000	USD
CY2011Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	620000	USD
CY2012	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	2195000	USD
CY2010	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	1328000	USD
CY2011	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	1390000	USD
CY2012	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	2271000	USD
CY2011	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	248000	USD
CY2011Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	12033000	USD
CY2012Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	13215000	USD
CY2011Q4	us-gaap	Assets Assets	691158000	USD
CY2012Q4	us-gaap	Assets Assets	1578368000	USD
CY2012Q4	us-gaap	Assets Current AssetsCurrent	229721000	USD
CY2011Q4	us-gaap	Assets Current AssetsCurrent	129575000	USD
CY2010	us-gaap	Average Sales Prices AverageSalesPrices	76.16
CY2010	us-gaap	Average Sales Prices AverageSalesPrices	4.38
CY2012	us-gaap	Average Sales Prices AverageSalesPrices	2.76
CY2012	us-gaap	Average Sales Prices AverageSalesPrices	91.32
CY2011	us-gaap	Average Sales Prices AverageSalesPrices	96.19
CY2011	us-gaap	Average Sales Prices AverageSalesPrices	4.12
CY2011Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	4049000	USD
CY2012Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	3926000	USD
CY2012Q4	us-gaap	Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities	661442000	USD
CY2011Q4	us-gaap	Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities	571213000	USD
CY2011	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization	112591000	USD
CY2010	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization	661000	USD
CY2012	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization	512636000	USD
	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization	407000	USD
CY2012Q4	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	626295000	USD
CY2011Q4	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	138623000	USD
CY2011Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Gross CapitalizedCostsOilAndGasProducingActivitiesGross	1030042000	USD
CY2012Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Gross CapitalizedCostsOilAndGasProducingActivitiesGross	1611090000	USD
CY2011Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Net CapitalizedCostsOilAndGasProducingActivitiesNet	458829000	USD
CY2012Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Net CapitalizedCostsOilAndGasProducingActivitiesNet	949648000	USD
CY2012Q4	us-gaap	Capitalized Costs Proved Properties CapitalizedCostsProvedProperties	984795000	USD
CY2011Q4	us-gaap	Capitalized Costs Proved Properties CapitalizedCostsProvedProperties	897130000	USD
CY2011Q4	us-gaap	Capitalized Costs Unproved Properties CapitalizedCostsUnprovedProperties	132912000	USD
CY2012Q4	us-gaap	Capitalized Costs Unproved Properties CapitalizedCostsUnprovedProperties	626295000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	93897000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	167088000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2468000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1724000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	91429000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	73191000	USD
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	744000	USD
CY2012	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	9660000	USD
CY2012Q4	us-gaap	Cash Uninsured Amount CashUninsuredAmount	166588000	USD
CY2011Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2011Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2011Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	67527386	shares
CY2011Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	55621371	shares
CY2011Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	55621371	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	67527386	shares
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	674000	USD
CY2011Q4	us-gaap	Common Stock Value CommonStockValue	556000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	63634000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	62279000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	112853000	USD
CY2011	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	119522000	USD
CY2010	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	17627000	USD
CY2012	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	513904000	USD
CY2011	us-gaap	Costs Incurred Asset Retirement Obligation Incurred CostsIncurredAssetRetirementObligationIncurred	1390000	USD
CY2012	us-gaap	Costs Incurred Asset Retirement Obligation Incurred CostsIncurredAssetRetirementObligationIncurred	2195000	USD
CY2010	us-gaap	Costs Incurred Asset Retirement Obligation Incurred CostsIncurredAssetRetirementObligationIncurred	1328000	USD
CY2012	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	121787000	USD
CY2010	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	64652000	USD
CY2011	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	123489000	USD
CY2010	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	0	USD
CY2011	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	3994000	USD
CY2012	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	93397000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	646000	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	282000	USD
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	95000	USD
CY2010	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	40000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0	USD
CY2012Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	308250000	USD
CY2012Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	3595000	USD
CY2010	us-gaap	Income Taxes Paid IncomeTaxesPaid	40000	USD
CY2010	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	4948000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	50506000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	84000	USD
CY2012Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	3105000	USD
CY2011Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	0	USD
CY2012Q4	us-gaap	Debt Instrument Unamortized Premium DebtInstrumentUnamortizedPremium	490000	USD
CY2011	us-gaap	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	0	USD
CY2010	us-gaap	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	0	USD
CY2012	us-gaap	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	214867000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	23419000	USD
CY2010	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-95000	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-372000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	25633000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2214000	USD
CY2010	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2011Q4	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	3000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	5000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	0	USD
CY2010Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	55062000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	48994000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	14148000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Hedging Transactions DeferredTaxAssetsHedgingTransactions	0	USD
CY2012Q4	us-gaap	Deferred Tax Assets Hedging Transactions DeferredTaxAssetsHedgingTransactions	3836000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Hedging Transactions DeferredTaxAssetsHedgingTransactions	0	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	-18607000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	1000000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	628000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	628000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	36647000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	9519000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent		USD
CY2011Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	1000000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	20967000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	1513000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	40880000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	0	USD
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	4315000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	6410000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	693000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	1643000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	1000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	2074000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	0	USD
CY2010Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	0	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	520000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	762000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	347000	USD
CY2010Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	0	USD
CY2010Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	54434000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	4629000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	12347000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	28126000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	35647000	USD
CY2010Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	0	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	10000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	0	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Gross Noncurrent DeferredTaxLiabilitiesGrossNoncurrent	0	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Gross Noncurrent DeferredTaxLiabilitiesGrossNoncurrent	18607000	USD
CY2010Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	0	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	0	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	9232000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	0	USD
CY2010Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	0	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	3618000	USD
CY2011	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	310000	USD
CY2010	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	316000	USD
CY2012	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	361000	USD
CY2012	us-gaap	Defined Contribution Plan Maximum Annual Contribution Per Employee Percent DefinedContributionPlanMaximumAnnualContributionPerEmployeePercent	1
CY2011Q4	us-gaap	Deposit Assets DepositAssets	4000	USD
CY2012Q4	us-gaap	Deposit Assets DepositAssets	4000	USD
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	62320000	USD
CY2010	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	38907000	USD
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	90749000	USD
CY2012Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	664000	USD
CY2011Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	1601000	USD
CY2012Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	10442000	USD
CY2011Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent		USD
CY2011Q4	us-gaap	Derivative Nonmonetary Notional Amount Price Per Barrel DerivativeNonmonetaryNotionalAmountPricePerBarrel	86.96
CY2012Q1	us-gaap	Derivative Nonmonetary Notional Amount Price Per Barrel DerivativeNonmonetaryNotionalAmountPricePerBarrel	108.00
CY2010Q1	us-gaap	Derivative Nonmonetary Notional Amount Price Per Barrel DerivativeNonmonetaryNotionalAmountPricePerBarrel	54.81
CY2010Q4	us-gaap	Derivative Nonmonetary Notional Amount Price Per Barrel DerivativeNonmonetaryNotionalAmountPricePerBarrel	58.24
CY2012Q3	us-gaap	Derivative Nonmonetary Notional Amount Price Per Barrel DerivativeNonmonetaryNotionalAmountPricePerBarrel	109.73
CY2012Q4	us-gaap	Derivative Nonmonetary Notional Amount Price Per Barrel DerivativeNonmonetaryNotionalAmountPricePerBarrel	107.29
CY2012	us-gaap	Development Costs DevelopmentCosts	0	USD
CY2010	us-gaap	Development Costs DevelopmentCosts	0	USD
CY2011	us-gaap	Development Costs DevelopmentCosts	0	USD
	us-gaap	Development Costs DevelopmentCosts	0	USD
CY2012Q4	us-gaap	Development Costs Cumulative DevelopmentCostsCumulative	0	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Standardized Measure DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesStandardizedMeasure	315487000	USD
CY2012	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	-3465000	USD
CY2010	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
CY2011	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves10 Percent Annual Discount For Estimated Timing Of Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves10PercentAnnualDiscountForEstimatedTimingOfCashFlows	96013000	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves10 Percent Annual Discount For Estimated Timing Of Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves10PercentAnnualDiscountForEstimatedTimingOfCashFlows	260788000	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves10 Percent Annual Discount For Estimated Timing Of Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves10PercentAnnualDiscountForEstimatedTimingOfCashFlows	260849000	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Cash Inflows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureCashInflows	1594050000	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Cash Inflows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureCashInflows	1479295000	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Cash Inflows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureCashInflows	954833000	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Development Costs DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureDevelopmentCosts	301651000	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Development Costs DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureDevelopmentCosts	306810000	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Development Costs DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureDevelopmentCosts	159113000	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Income Tax Expense DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureIncomeTaxExpense	114867000	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Income Tax Expense DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureIncomeTaxExpense	159171000	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Income Tax Expense DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureIncomeTaxExpense	229649000	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Net Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureNetCashFlows	576336000	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Net Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureNetCashFlows	637469000	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Net Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureNetCashFlows	444654000	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production Costs DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionCosts	305814000	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production Costs DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionCosts	295383000	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production Costs DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionCosts	147024000	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Standardized Measure DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesStandardizedMeasure	348641000	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Standardized Measure DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesStandardizedMeasure	376681000	USD
CY2011Q4	us-gaap	Due From Related Parties Current DueFromRelatedPartiesCurrent	4731000	USD
CY2012Q4	us-gaap	Due From Related Parties Current DueFromRelatedPartiesCurrent	34848000	USD
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.22
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.22
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.08
CY2012Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2011Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.57
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.48
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.45
CY2011Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.58
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.01
CY2011Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.59
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.20
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.07
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.21
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2011Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.47
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.01
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.45
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.57
CY2011Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.59
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.48
CY2011Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.57
CY2012Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	6745000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y6M18D
CY2011	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	870000	USD
CY2010	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	565000	USD
CY2012	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	820000	USD
CY2011Q4	us-gaap	Equity Method Investments EquityMethodInvestments	86824000	USD
CY2012Q4	us-gaap	Equity Method Investments EquityMethodInvestments	381484000	USD
CY2012	us-gaap	Exploration Costs ExplorationCosts	0	USD
CY2010	us-gaap	Exploration Costs ExplorationCosts	0	USD
CY2011	us-gaap	Exploration Costs ExplorationCosts	0	USD
	us-gaap	Exploration Costs ExplorationCosts	0	USD
CY2012Q4	us-gaap	Exploration Costs Cumulative ExplorationCostsCumulative	0	USD
CY2011	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	107110000	USD
CY2010	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	88227000	USD
CY2012	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	151654000	USD
CY2011Q4	us-gaap	Gas Imbalance Payable Current And Noncurrent GasImbalancePayableCurrentAndNoncurrent	0	USD
CY2012Q4	us-gaap	Gas Imbalance Payable Current And Noncurrent GasImbalancePayableCurrentAndNoncurrent	354000	USD
CY2011	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	8074000	USD
CY2012	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	13808000	USD
CY2010	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	6063000	USD
CY2011	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	108422000	USD
CY2012	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	71836000	USD
CY2012Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	4476000	USD
CY2011Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	3692000	USD
CY2010	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	0	USD
CY2011	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	25000	USD
CY2012	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	-144000	USD
CY2011	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	0	USD
CY2012	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-5702000	USD
CY2010	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	0	USD
CY2012	us-gaap	Gain Loss On Sale Of Oil And Gas Property GainLossOnSaleOfOilAndGasProperty	7300000	USD
CY2011	us-gaap	Gain Loss On Sale Of Oil And Gas Property GainLossOnSaleOfOilAndGasProperty	0	USD
CY2010	us-gaap	Gain Loss On Sale Of Oil And Gas Property GainLossOnSaleOfOilAndGasProperty	0	USD
CY2011	us-gaap	Gain On Fair Value Hedge Ineffectiveness GainOnFairValueHedgeIneffectiveness	25000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	1612000	USD
CY2011	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	13067000	USD
CY2010	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	47363000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	47403000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	108332000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	98199000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.22
CY2012	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.28
CY2010	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.08
CY2010	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.07
CY2011	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.20
CY2012	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.27
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.06
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.06
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
CY2012	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	8322000	USD
CY2011	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-1418000	USD
CY2010	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-977000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26363000	USD
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-90000	USD
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	40000	USD
CY2012Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2012Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2012Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10849000	USD
CY2011Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2011Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1000	USD
CY2012Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15514000	USD
CY2011Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2011Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-91000	USD
CY2012	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-9792000	USD
CY2011	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-42087000	USD
CY2010	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-18818000	USD
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	34370000	USD
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	37916000	USD
CY2010	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	16591000	USD
CY2012	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	292000	USD
CY2010	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	5460000	USD
CY2012	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-2404000	USD
CY2010	us-gaap	Increase Decrease In Accounts Receivable Related Parties IncreaseDecreaseInAccountsReceivableRelatedParties	437000	USD
CY2012	us-gaap	Increase Decrease In Accounts Receivable Related Parties IncreaseDecreaseInAccountsReceivableRelatedParties	30117000	USD
CY2011	us-gaap	Increase Decrease In Accounts Receivable Related Parties IncreaseDecreaseInAccountsReceivableRelatedParties	4158000	USD
CY2012	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	25585000	USD
CY2011	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	-36674000	USD
CY2010	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	-54879000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	0	USD
CY2012	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	0	USD
CY2011	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-146000	USD
CY2010	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-111000	USD
CY2010	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2378000	USD
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1493000	USD
CY2011	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4227000	USD
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	261000	USD
CY2011	us-gaap	Income Taxes Paid IncomeTaxesPaid	1000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	75000	USD
CY2012	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	179000	USD
CY2011	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-405000	USD
CY2010	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-315000	USD
CY2012	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-8000	USD
CY2011	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-8000	USD
CY2010	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-8000	USD
CY2012	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	0	USD
CY2011	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	72000	USD
CY2010	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	63043000	USD
CY2012	us-gaap	Interest Expense InterestExpense	7458000	USD
CY2011	us-gaap	Interest Expense InterestExpense	1400000	USD
CY2010	us-gaap	Interest Expense InterestExpense	2761000	USD
CY2012	us-gaap	Interest Expense Debt InterestExpenseDebt	7458000	USD
CY2011	us-gaap	Interest Expense Debt InterestExpenseDebt	1400000	USD
CY2011	us-gaap	Interest Paid InterestPaid	963000	USD
CY2012	us-gaap	Interest Paid InterestPaid	1404000	USD
CY2012	us-gaap	Interest Paid Net InterestPaidNet	1461000	USD
CY2011	us-gaap	Interest Paid Net InterestPaidNet	991000	USD
CY2010	us-gaap	Interest Paid Net InterestPaidNet	1949000	USD
CY2012	us-gaap	Investment Income Interest InvestmentIncomeInterest	72000	USD
CY2011	us-gaap	Investment Income Interest InvestmentIncomeInterest	186000	USD
CY2010	us-gaap	Investment Income Interest InvestmentIncomeInterest	387000	USD
CY2012Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	151317000	USD
CY2011Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	0	USD
CY2012Q4	us-gaap	Land Land	260000	USD
CY2011Q4	us-gaap	Land Land	283000	USD
CY2011	us-gaap	Lease Operating Expense LeaseOperatingExpense	20897000	USD
CY2012	us-gaap	Lease Operating Expense LeaseOperatingExpense	24308000	USD
CY2010	us-gaap	Lease Operating Expense LeaseOperatingExpense	17614000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	451960000	USD
CY2011Q4	us-gaap	Liabilities Liabilities	58808000	USD
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	691158000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1578368000	USD
CY2011Q4	us-gaap	Liabilities Current LiabilitiesCurrent	44633000	USD
CY2012Q4	us-gaap	Liabilities Current LiabilitiesCurrent	120896000	USD
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	302143000	USD
CY2011Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	141000	USD
CY2012Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	150000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	300000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	150000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	0	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1667000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	168000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	158000	USD
CY2012Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	298888000	USD
CY2011Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2142000	USD
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	29009000	USD
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	26869000	USD
CY2011Q2	us-gaap	Net Income Loss NetIncomeLoss	27265000	USD
CY2012	us-gaap	Loss Contingency Disclosures LossContingencyDisclosures	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">CONTINGENCIES</font></div><div style="line-height:120%;padding-top:6px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Louisiana Department of Revenue (“LDR”) is disputing Gulfport’s severance tax payments to the State of Louisiana from the sale of oil under fixed price contracts during the years 2005 to 2007. The LDR maintains that Gulfport paid approximately </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$1,800,000</font><font style="font-family:inherit;font-size:10pt;"> less in severance taxes under fixed price terms than the severance taxes Gulfport would have had to pay had it paid severance taxes on the oil at the contracted market rates only. Gulfport has denied any liability to the LDR for underpayment of severance taxes and has maintained that it was entitled to enter into the fixed price contracts with unrelated third parties and pay severance taxes based upon the proceeds received under those contracts. Gulfport has maintained its right to contest any final assessment or suit for collection if brought by the State. On April 20, 2009, the LDR filed a lawsuit in the 15</font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">th</sup></font><font style="font-family:inherit;font-size:10pt;"> Judicial District Court, Lafayette Parish, in Louisiana against Gulfport seeking </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$2,275,729</font><font style="font-family:inherit;font-size:10pt;"> in severance taxes, plus interest and court costs. Gulfport filed a response denying any liability to the LDR for underpayment of severance taxes and is defending itself in the lawsuit. The LDR had taken no further action on this lawsuit since filing its petition other than propounding discovery requests to which Gulfport has responded. Since serving discovery requests on the LDR and receiving the LDR's responses in 2012 there has been no further activity on the case and no trial date has been set. </font></div><div style="line-height:120%;padding-top:12px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In December 2010, the LDR filed </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">two</font><font style="font-family:inherit;font-size:10pt;"> identical lawsuits against Gulfport in different venues to recover allegedly underpaid severance taxes on crude oil for the period January 1, 2007 through December 31, 2010, together with a claim for attorney’s fees. The petitions do not make any specific claim for damages or unpaid taxes. As with the first lawsuit filed by the LDR in 2009, Gulfport denies all liability and will vigorously defend the lawsuit. The cases are in the early stages, and Gulfport has not yet filed a response to the recent lawsuits. Recently, the LDR filed motions to stay the lawsuits before Gulfport filed any responsive pleadings. The LDR has advised Gulfport that it intends to pursue settlement discussions with Gulfport and other similarly situated defendants in separate proceedings, but has taken no action to initiate settlement talks. There has been no activity on either of these lawsuits for more than a year.</font></div><div style="line-height:120%;padding-bottom:16px;padding-top:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Other Litigation</font></div><div style="line-height:120%;padding-bottom:16px;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In November 2006, Cudd Pressure Control, Inc. (“Cudd”) filed a lawsuit against Gulfport, Great White Pressure Control LLC (“Great White”) and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">six</font><font style="font-family:inherit;font-size:10pt;"> former Cudd employees in the 129th Judicial District Harris County, Texas. The lawsuit was subsequently removed to the United States District Court for the Southern District of Texas (Houston Division). The lawsuit alleged RICO violations and several other causes of action relating to Great White’s employment of the former Cudd employees and sought unspecified monetary damages and injunctive relief. On stipulation by the parties, the plaintiff’s RICO claim was dismissed without prejudice by order of the court on February 14, 2007. Gulfport filed a motion for summary judgment on October 5, 2007. The court entered a final interlocutory judgment in favor of all defendants, including Gulfport, on April 8, 2008. On November 3, 2008, Cudd filed its appeal with the U.S. Court of Appeals for the Fifth Circuit. The Fifth Circuit vacated the district court decision finding, among other things, that the district court should not have entered summary judgment without first allowing more discovery. The case was remanded to the district court, and Cudd filed a motion to remand the case to the original state court, which motion was granted. Cudd subsequently filed amended petitions with the state court (a) alleging, among other things, that Gulfport conspired with the other defendants to misappropriate, and misappropriated Cudd’s trade secrets and caused its employees to breach their fiduciary duties, and (b) seeking monetary damages including </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$11.8 million</font><font style="font-family:inherit;font-size:10pt;"> as a reasonable royalty for the alleged use of its trade secrets. Cudd also sought disgorgement of the alleged benefits received by the various defendants. Cudd also sought its attorney's fees, which Cudd claimed were not less than </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$450,000</font><font style="font-family:inherit;font-size:10pt;">, plus </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">10%</font><font style="font-family:inherit;font-size:10pt;"> of any final judgment. This case went to trial on September 5, 2012 and on September 28, 2012 the jury rendered its verdict, awarding no damages to the plaintiffs. Gulfport along with all defendants filed a Motion for Entry of Judgment that is consistent with the jury's verdict. Cudd filed an Application for Disgorgement and a Motion for Judgment Notwithstanding the Verdict. The court denied all of Cudd's post-trial motions on October 12, 2012, and issued its final judgment on January 10, 2013. On that same day, Cudd filed motions for a new trial and to modify, correct of reform the judgment. Those motions remain pending. </font></div><div style="line-height:120%;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">On July 30, 2010, </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">six</font><font style="font-family:inherit;font-size:10pt;"> individuals and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">one</font><font style="font-family:inherit;font-size:10pt;"> limited liability company sued </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">15</font><font style="font-family:inherit;font-size:10pt;"> oil and gas companies in Cameron Parish Louisiana for contamination across the surface of where the defendants operated in an action entitled Reeds et al. v. BP American Production Company et al.,38th Judicial District. No. 10-18714. The plaintiffs’ original petition for damages, which did not name Gulfport as a defendant, alleges that the plaintiffs’ property located in Cameron Parish, Louisiana within the Hackberry oil field is contaminated as a result of historic oil and gas exploration and production activities. Plaintiffs allege that the defendants conducted, directed and participated in various oil and gas exploration and production activities on their property which allegedly have contaminated or otherwise caused damage to the property, and have sued the defendants for alleged breaches of oil, gas and mineral leases, as well as for alleged negligence, trespass, failure to warn, strict liability, punitive damages, lease liability, contract liability, unjust enrichment, restoration damages, assessment and response costs and stigma damages. On December 7, 2010, Gulfport was served with a copy of the plaintiffs’ first supplemental and amending petition which added </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">four</font><font style="font-family:inherit;font-size:10pt;"> additional plaintiffs and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">six</font><font style="font-family:inherit;font-size:10pt;"> additional defendants, including Gulfport, bringing the total number of defendants to </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">21</font><font style="font-family:inherit;font-size:10pt;">. It also increased the total acreage at issue in this litigation from </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">240</font><font style="font-family:inherit;font-size:10pt;"> acres to approximately </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">1,700</font><font style="font-family:inherit;font-size:10pt;"> acres. In addition to the damages sought in the original petition, the plaintiffs now also seek: damages sufficient to cover the cost of conducting a comprehensive environmental assessment of all present and yet unidentified pollution and contamination of their property; the cost to restore the property to its pre-polluted original condition; damages for mental anguish and annoyance, discomfort and inconvenience caused by the nuisance created by defendants; land loss and subsidence damages and the cost of backfilling canals and other excavations; damages for loss of use of land and lost profits and income; attorney fees and expenses and damages for evaluation and remediation of any contamination that threatens groundwater. In addition to Gulfport, current defendants include ExxonMobil Oil Corporation, Mobil Exploration & Producing North America Inc., Chevron U.S.A. Inc., The Superior Oil Company, Union Oil Company of California, BP America Production Company, Tempest Oil Company, Inc., ConocoPhillips Company, Continental Oil Company, WM. T. Burton Industries, Inc., Freeport Sulphur Company, Eagle Petroleum Company, U.S. Oil of Louisiana, M&S Oil Company, and Empire Land Corporation, Inc. of Delaware. On January 21, 2011, Gulfport filed a pleading challenging the legal sufficiency of the petitions on several grounds and requesting that they either be dismissed or that plaintiffs be required to amend such petitions. In response to the pleadings filed by Gulfport and similar pleadings filed by other defendants, the plaintiffs filed a third amending petition with exhibits which expands the description of the property at issue, attaches numerous aerial photos and identifies the mineral leases at issue. In response, Gulfport and numerous defendants re-urged their pleadings challenging the legal sufficiency of the petitions. Some of the defendants’ grounds for challenging the plaintiffs’ petitions were heard by the court on May 25, 2011 and were denied. The court signed the written judgment on December 9, 2011. Gulfport noticed its intent to seek supervisory review on December 19, 2011 and the trial court fixed a return date of January 11, 2012 for the filing of the writ application. Gulfport filed its supervisory writ, which was denied by the Louisiana Third Circuit Court of Appeal and the Louisiana Supreme Court. Gulfport has been active in serving discovery requests and responding to discovery requests from the plaintiffs. It is anticipated that the discovery phase of this case will become more active in the upcoming months. Plaintiffs' counsel is seeking a trial date in mid-2013.</font></div><div style="line-height:120%;padding-bottom:16px;padding-top:12px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Due to the early stages of the LDR and Reed litigation, the outcome is uncertain and management cannot determine the amount of loss, if any, that may result. In each case, management has determined the possibility of loss is remote. However, litigation is inherently uncertain. Adverse decisions in one or more of the above matters could have a material adverse effect on the Company’s financial condition or results of operations and management cannot determine the amount of loss, if any, that may result.</font></div><div style="line-height:120%;padding-bottom:16px;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company has been named as a defendant in various other lawsuits related to its business. In each such case, management has determined that the possibility of loss is remote. The resolution of these matters is not expected to have a material adverse effect on the Company financial condition or results of operations in future periods.</font></div><div style="line-height:120%;padding-top:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Concentration of Credit Risk</font></div><div style="line-height:120%;padding-top:6px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Gulfport operates in the oil and gas industry principally in the state of Louisiana with sales to refineries, re-sellers such as pipeline companies, and local distribution companies. While certain of these customers are affected by periodic downturns in the economy in general or in their specific segment of the oil and gas industry, Gulfport believes that its level of credit-related losses due to such economic fluctuations has been immaterial and will continue to be immaterial to the Company’s results of operations in the long term.</font></div><div style="line-height:120%;padding-top:12px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company maintains cash balances at several banks. Accounts at each institution are insured by the Federal Deposit Insurance Corporation up to </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$250,000</font><font style="font-family:inherit;font-size:10pt;">. At </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2012</font><font style="font-family:inherit;font-size:10pt;">, Gulfport held cash in excess of insured limits in these banks totaling </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$166,588,000</font><font style="font-family:inherit;font-size:10pt;">.</font></div><div style="line-height:120%;padding-top:12px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">During the year ended </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2012</font><font style="font-family:inherit;font-size:10pt;">, Gulfport sold approximately </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">92%</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">8%</font><font style="font-family:inherit;font-size:10pt;"> of its oil production to Shell Trading Company (“Shell”) and Diamondback O&G, respectively, </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">91%</font><font style="font-family:inherit;font-size:10pt;"> of its natural gas liquids production to Diamondback O&G, and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">41%</font><font style="font-family:inherit;font-size:10pt;">, </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">18%</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">16%</font><font style="font-family:inherit;font-size:10pt;"> of its natural gas production to Noble Americas Gas, Hess and Chevron, respectively. During the year ended </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2011</font><font style="font-family:inherit;font-size:10pt;">, Gulfport sold approximately </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">93%</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">7%</font><font style="font-family:inherit;font-size:10pt;"> of its oil production to Shell and Diamondback O&G, respectively, </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">100%</font><font style="font-family:inherit;font-size:10pt;"> of its natural gas liquids production to Diamondback O&G and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">50%</font><font style="font-family:inherit;font-size:10pt;">, </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">27%</font><font style="font-family:inherit;font-size:10pt;">, and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">22%</font><font style="font-family:inherit;font-size:10pt;"> of its natural gas production to Hilcorp Energy Company, Chevron, and Diamondback O&G, respectively. During the year ended </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2010</font><font style="font-family:inherit;font-size:10pt;">, Gulfport sold approximately </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">75%</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">19%</font><font style="font-family:inherit;font-size:10pt;"> of its oil production to Shell and Diamondback O&G, respectively, and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">50%</font><font style="font-family:inherit;font-size:10pt;">, </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">32%</font><font style="font-family:inherit;font-size:10pt;">, and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">10%</font><font style="font-family:inherit;font-size:10pt;"> of its natural gas production to Diamondback O&G, Chevron, and Hilcorp, respectively.</font></div></div>
CY2012	us-gaap	Loss On Fair Value Hedge Ineffectiveness LossOnFairValueHedgeIneffectiveness	144000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	256539000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	714612000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	20224000	USD
CY2012	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:6px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Business</font></div><div style="line-height:120%;padding-top:6px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Gulfport Energy Corporation (“Gulfport” or the “Company”) is an independent oil and gas exploration, development and production company with its principal properties located in the Louisiana Gulf Coast, the Utica Shale in Eastern Ohio and in Western Colorado in the Niobrara Formation and has investments in companies operating in the Permian Basin in West Texas, Canada and Thailand. </font></div></div>
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-840579000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-323248000	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-105315000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	158138000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	199158000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	85835000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	68371000	USD
CY2010	us-gaap	Net Income Loss NetIncomeLoss	47363000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	108422000	USD
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	502000	USD
CY2012Q4	us-gaap	Net Income Loss NetIncomeLoss	15883000	USD
CY2011Q1	us-gaap	Net Income Loss NetIncomeLoss	21174000	USD
CY2012Q2	us-gaap	Net Income Loss NetIncomeLoss	25117000	USD
CY2011Q4	us-gaap	Net Income Loss NetIncomeLoss	30974000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	68371000	USD
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	108422000	USD
CY2010	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	47363000	USD
CY2010	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	47363000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	68371000	USD
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	108422000	USD
CY2012	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	936000	USD
CY2011	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-2632000	USD
CY2010	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-3351000	USD
CY2011Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	1035754000	USD
CY2012Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	1611090000	USD
CY2011	us-gaap	Operating Expenses OperatingExpenses	118290000	USD
CY2010	us-gaap	Operating Expenses OperatingExpenses	77167000	USD
CY2012	us-gaap	Operating Expenses OperatingExpenses	151663000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	110964000	USD
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	50754000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	97263000	USD
CY2011Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	28156000	USD
CY2011Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	22105000	USD
CY2012Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	18178000	USD
CY2012Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	27263000	USD
CY2011Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	31585000	USD
CY2011Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	29118000	USD
CY2012Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	25875000	USD
CY2012Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	25947000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	586000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	179000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	34000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	68000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	127000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	178000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	0	USD
CY2010	us-gaap	Operating Leases Rent Expense Minimum Rentals OperatingLeasesRentExpenseMinimumRentals	65000	USD
CY2012	us-gaap	Operating Leases Rent Expense Minimum Rentals OperatingLeasesRentExpenseMinimumRentals	139000	USD
CY2011	us-gaap	Operating Leases Rent Expense Minimum Rentals OperatingLeasesRentExpenseMinimumRentals	52000	USD
CY2011	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	52000	USD
CY2012	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	132000	USD
CY2010	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	65000	USD
CY2012	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	7000	USD
CY2011	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	0	USD
CY2010	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	0	USD
CY2011	us-gaap	Origination Of Notes Receivable From Related Parties OriginationOfNotesReceivableFromRelatedParties	3182000	USD
CY2010	us-gaap	Origination Of Notes Receivable From Related Parties OriginationOfNotesReceivableFromRelatedParties	2877000	USD
CY2012	us-gaap	Origination Of Notes Receivable From Related Parties OriginationOfNotesReceivableFromRelatedParties	0	USD
CY2011Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	5123000	USD
CY2012Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	13295000	USD
CY2010	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	2255000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax	0	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax	0	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax	512000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	1576000	USD
CY2010	us-gaap	Payments Of Loan Costs PaymentsOfLoanCosts	1144000	USD
CY2010	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	1244000	USD
CY2011	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	34621000	USD
CY2011	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-1865000	USD
CY2012	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	1355000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	16271000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	4431000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-6092000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax	4720000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax	1517000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	1005000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	18736000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	4720000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-4720000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-8452000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-4301000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	0	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	0	USD
CY2011Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	0	USD
CY2012Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	354000	USD
CY2010	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	285000	USD
CY2012	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	325000	USD
CY2011	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	301000	USD
CY2012	us-gaap	Payments Of Loan Costs PaymentsOfLoanCosts	9175000	USD
CY2011	us-gaap	Payments Of Loan Costs PaymentsOfLoanCosts	981000	USD
CY2012	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	147307000	USD
CY2012	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	757192000	USD
CY2010	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	101644000	USD
CY2011	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	287292000	USD
CY2012	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	638000	USD
CY2011	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	415000	USD
CY2010	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	427000	USD
CY2011	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.12
CY2012	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.12
CY2011Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2011Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2011Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2012Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2011Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2012Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2011Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2012Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	1506000	USD
CY2011Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	1327000	USD
CY2011	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	307154000	USD
CY2012	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	427091000	USD
CY2010	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	21879000	USD
CY2012Q4	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	427900000	USD
CY2012	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	296835000	USD
CY2011	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2010	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2010	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	52200000	USD
CY2011	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	48000000	USD
CY2012	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	158500000	USD
CY2011	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	1384000	USD
CY2012	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	63590000	USD
CY2010	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	304000	USD
CY2012	us-gaap	Proceeds From Sale Of Other Property Plant And Equipment ProceedsFromSaleOfOtherPropertyPlantAndEquipment	140000	USD
CY2010	us-gaap	Proceeds From Sale Of Other Property Plant And Equipment ProceedsFromSaleOfOtherPropertyPlantAndEquipment	0	USD
CY2011	us-gaap	Proceeds From Sale Of Other Property Plant And Equipment ProceedsFromSaleOfOtherPropertyPlantAndEquipment	0	USD
CY2011Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1043778000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1619752000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	468636000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	953868000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	8024000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	8662000	USD
CY2010	us-gaap	Repayments Of Debt RepaymentsOfDebt	52711000	USD
CY2012	us-gaap	Repayments Of Debt RepaymentsOfDebt	158639000	USD
CY2011	us-gaap	Repayments Of Debt RepaymentsOfDebt	97634000	USD
CY2012	us-gaap	Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions	90230000	USD
CY2011	us-gaap	Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions	61965000	USD
CY2010	us-gaap	Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions	38600000	USD
CY2010	us-gaap	Results Of Operations Income Before Income Taxes ResultsOfOperationsIncomeBeforeIncomeTaxes	57456000	USD
CY2012	us-gaap	Results Of Operations Income Before Income Taxes ResultsOfOperationsIncomeBeforeIncomeTaxes	104663000	USD
CY2011	us-gaap	Results Of Operations Income Before Income Taxes ResultsOfOperationsIncomeBeforeIncomeTaxes	119758000	USD
CY2012	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	26363000	USD
CY2010	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	40000	USD
CY2011	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	-90000	USD
CY2011	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	119848000	USD
CY2012	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	78300000	USD
CY2010	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	57416000	USD
CY2010	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	31580000	USD
CY2011	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	47230000	USD
CY2012	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	53708000	USD
CY2012	us-gaap	Results Of Operations Revenue From Oil And Gas Producing Activities ResultsOfOperationsRevenueFromOilAndGasProducingActivities	248601000	USD
CY2010	us-gaap	Results Of Operations Revenue From Oil And Gas Producing Activities ResultsOfOperationsRevenueFromOilAndGasProducingActivities	127636000	USD
CY2011	us-gaap	Results Of Operations Revenue From Oil And Gas Producing Activities ResultsOfOperationsRevenueFromOilAndGasProducingActivities	228953000	USD
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	24547000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	92918000	USD
CY2012	us-gaap	Revenues Revenues	248926000	USD
CY2010	us-gaap	Revenues Revenues	127921000	USD
CY2011	us-gaap	Revenues Revenues	229254000	USD
CY2012Q2	us-gaap	Revenues Revenues	66325000	USD
CY2012Q1	us-gaap	Revenues Revenues	65461000	USD
CY2011Q2	us-gaap	Revenues Revenues	55589000	USD
CY2012Q4	us-gaap	Revenues Revenues	56603000	USD
CY2011Q1	us-gaap	Revenues Revenues	46638000	USD
CY2011Q3	us-gaap	Revenues Revenues	58081000	USD
CY2011Q4	us-gaap	Revenues Revenues	68946000	USD
CY2012Q3	us-gaap	Revenues Revenues	60537000	USD
CY2011	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-112553000	USD
CY2010	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-89155000	USD
CY2012	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-10504000	USD
CY2012	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	194893000	USD
CY2010	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	96056000	USD
CY2011	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	181723000	USD
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	772000	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	2813000	USD
CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	295000	USD
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	0	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	0	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	19334	shares
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	0.00
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	26.81
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	0.00
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	196832	shares
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	111667	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	153332	shares
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	12.94
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	35.87
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	31.15
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	203348	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	245831	shares
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	60244	shares
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	113386	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	31.88
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	6.01
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	11.72
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	26.02
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	135015	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	63370	shares
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	58525	shares
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	8.17
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	29.59
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	12.87
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	335241	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	6.37
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	628000	USD
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2308000	USD
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	545000	USD
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	0	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	0	shares
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	1500	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	0.00
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	2.00
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	0.00
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	0.00
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	0.00
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	0.00
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	2192000	USD
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	10678000	USD
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	8172000	USD
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	6621000	USD
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	508630	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	356241	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	335241	shares
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	458241	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	6.37
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	6.51
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	7.14
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	7.23
CY2011	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	9.74
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	8.80
CY2010	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	6.46
CY2012Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	335241	shares
CY2012Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	335241	shares
CY2012Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	10678000	USD
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y4M21D
CY2009	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P5Y4M17D
CY2010	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y5M23D
CY2011	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y4M28D
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y4M21D
CY2011	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Period Increase Decrease StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesPeriodIncreaseDecrease	61194000	USD
CY2012	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Period Increase Decrease StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesPeriodIncreaseDecrease	-28040000	USD
CY2010	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Period Increase Decrease StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesPeriodIncreaseDecrease	74713000	USD
CY2011	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	102000	shares
CY2012	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	21000	shares
CY2010	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	48889	shares
CY2011	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	306161000	USD
CY2010	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	21358000	USD
CY2012	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	426907000	USD
CY2012	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2012	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	184000	USD
CY2010	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	315000	USD
CY2011	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	993000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	632350000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	1126408000	USD
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	211056000	USD
CY2009Q4	us-gaap	Stockholders Equity StockholdersEquity	125051000	USD
CY2012Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	30000	shares
CY2012Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	9388000	USD
CY2011Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	1495000	USD
CY2012	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	29400000	USD
CY2010	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	13966000	USD
CY2011	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	26333000	USD
CY2011Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	30000	shares
CY2012	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Use of Estimates</font></div><div style="line-height:120%;padding-top:6px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates, judgments and assumptions that affect the reported amounts of assets and liabilities as of the date of the financial statements and revenues and expenses during the reporting period. Actual results could differ materially from those estimates. Significant estimates with regard to these financial statements include the estimate of proved oil and gas reserve quantities and the related present value of estimated future net cash flows there from, the amount and timing of asset retirement obligations, the realization of deferred tax assets and the realization of future net operating loss carryforwards available as reductions of income tax expense. The estimate of the Company’s oil and gas reserves is used to compute depletion, depreciation, amortization and impairment of oil and gas properties.</font></div></div>
CY2010	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	392902	shares
CY2012	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	484134	shares
CY2011	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	452123	shares
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	56417488	shares
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	49206963	shares
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	44256092	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	48754840	shares
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	55933354	shares
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	43863190	shares
CY2012	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	1143000	USD
CY2011	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	0	USD
CY2012	gpor	Accounts Receivable Collection Period AccountsReceivableCollectionPeriod	P30D
CY2012	gpor	Affiliates Participation In Acquisition Ratio AffiliatesParticipationInAcquisitionRatio	0.5
CY2011	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	5368000	USD
CY2012	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	9068000	USD
CY2010	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	4117000	USD
CY2010	gpor	Capitalized Stock Based Compensation CapitalizedStockBasedCompensation	197000	USD
CY2011	gpor	Capitalized Stock Based Compensation CapitalizedStockBasedCompensation	515000	USD
CY2012	gpor	Capitalized Stock Based Compensation CapitalizedStockBasedCompensation	1875000	USD
CY2011Q4	gpor	Certificates Of Deposit Securing Letter Of Credit CertificatesOfDepositSecuringLetterOfCredit	275000	USD
CY2012Q4	gpor	Certificates Of Deposit Securing Letter Of Credit CertificatesOfDepositSecuringLetterOfCredit	275000	USD
CY2011Q4	gpor	Deferred Tax Assets Non Oil And Gas Property Basis Difference DeferredTaxAssetsNonOilAndGasPropertyBasisDifference	103000	USD
CY2012	gpor	Change In Production Rates And Other ChangeInProductionRatesAndOther	68376000	USD
CY2010	gpor	Change In Production Rates And Other ChangeInProductionRatesAndOther	17309000	USD
CY2011	gpor	Change In Production Rates And Other ChangeInProductionRatesAndOther	117342000	USD
CY2012Q1	gpor	Class Of Warrant Or Right Expired ClassOfWarrantOrRightExpired	8875	shares
CY2012Q4	gpor	Contractual Obligation Unfunded Cotst In Excess Of Threshold ContractualObligationUnfundedCotstInExcessOfThreshold	2000000	USD
CY2012	gpor	Conversion Ratio Gas To Barrels Of Oil ConversionRatioGasToBarrelsOfOil	6
CY2012	gpor	Costs Incurred Recompletions Of Oil And Gas Properties CostsIncurredRecompletionsOfOilAndGasProperties	24643000	USD
CY2011	gpor	Costs Incurred Recompletions Of Oil And Gas Properties CostsIncurredRecompletionsOfOilAndGasProperties	17259000	USD
CY2010	gpor	Costs Incurred Recompletions Of Oil And Gas Properties CostsIncurredRecompletionsOfOilAndGasProperties	16917000	USD
CY2011Q4	gpor	Cumulative Capitalization Of General And Administrative Costs Incurred And Capitalized To Full Cost Pool CumulativeCapitalizationOfGeneralAndAdministrativeCostsIncurredAndCapitalizedToFullCostPool	23494000	USD
CY2012Q4	gpor	Cumulative Capitalization Of General And Administrative Costs Incurred And Capitalized To Full Cost Pool CumulativeCapitalizationOfGeneralAndAdministrativeCostsIncurredAndCapitalizedToFullCostPool	32562000	USD
CY2011	gpor	Debt Instrument Increase Decrease Accrued Interest DebtInstrumentIncreaseDecreaseAccruedInterest	-132000	USD
CY2012	gpor	Debt Instrument Increase Decrease Accrued Interest DebtInstrumentIncreaseDecreaseAccruedInterest	4155000	USD
CY2012	gpor	Debt Instrument Restrictive Covenants Maximum Ratio Of Funded Debt To Earnings Before Interest Taxes Depreciation Amortizations And Exploration Expenses DebtInstrumentRestrictiveCovenantsMaximumRatioOfFundedDebtToEarningsBeforeInterestTaxesDepreciationAmortizationsAndExplorationExpenses	2
CY2012	gpor	Debt Instrument Restrictive Covenants Minimum Ratio Of Earnings Before Interest Taxes Depreciation Amortizations And Exploration Expenses To Interest Expense DebtInstrumentRestrictiveCovenantsMinimumRatioOfEarningsBeforeInterestTaxesDepreciationAmortizationsAndExplorationExpensesToInterestExpense	3
CY2010	gpor	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	-95000	USD
CY2011	gpor	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	-372000	USD
CY2012	gpor	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	24120000	USD
CY2012Q4	gpor	Deferred Tax Asset Oil And Gas Property Basis Difference DeferredTaxAssetOilAndGasPropertyBasisDifference	0	USD
CY2011Q4	gpor	Deferred Tax Asset Oil And Gas Property Basis Difference DeferredTaxAssetOilAndGasPropertyBasisDifference	0	USD
CY2010Q4	gpor	Deferred Tax Asset Oil And Gas Property Basis Difference DeferredTaxAssetOilAndGasPropertyBasisDifference	32054000	USD
CY2012Q4	gpor	Deferred Tax Assets Investment In Noncontrolled Affiliates DeferredTaxAssetsInvestmentInNoncontrolledAffiliates	0	USD
CY2011Q4	gpor	Deferred Tax Assets Investment In Noncontrolled Affiliates DeferredTaxAssetsInvestmentInNoncontrolledAffiliates	78000	USD
CY2010Q4	gpor	Deferred Tax Assets Investment In Noncontrolled Affiliates DeferredTaxAssetsInvestmentInNoncontrolledAffiliates	722000	USD
CY2012Q4	gpor	Deferred Tax Assets Non Oil And Gas Property Basis Difference DeferredTaxAssetsNonOilAndGasPropertyBasisDifference	0	USD
CY2010Q4	gpor	Deferred Tax Assets Non Oil And Gas Property Basis Difference DeferredTaxAssetsNonOilAndGasPropertyBasisDifference	279000	USD
CY2012Q4	gpor	Deferred Tax Liabilities Non Oil And Gass Property Basis Difference DeferredTaxLiabilitiesNonOilAndGassPropertyBasisDifference	227000	USD
CY2010Q4	gpor	Deferred Tax Liabilities Non Oil And Gass Property Basis Difference DeferredTaxLiabilitiesNonOilAndGassPropertyBasisDifference	0	USD
CY2011Q4	gpor	Deferred Tax Liabilities Non Oil And Gass Property Basis Difference DeferredTaxLiabilitiesNonOilAndGassPropertyBasisDifference	0	USD
CY2012Q4	gpor	Deferred Tax Liability Oil And Gas Property Basis Difference DeferredTaxLiabilityOilAndGasPropertyBasisDifference	15049000	USD
CY2010Q4	gpor	Deferred Tax Liability Oil And Gas Property Basis Difference DeferredTaxLiabilityOilAndGasPropertyBasisDifference	0	USD
CY2011Q4	gpor	Deferred Tax Liability Oil And Gas Property Basis Difference DeferredTaxLiabilityOilAndGasPropertyBasisDifference	35637000	USD
CY2012	gpor	Delivered Percentage Of Production Under Fixed Price Swaps DeliveredPercentageOfProductionUnderFixedPriceSwaps	0.46
CY2011	gpor	Depletion Per Barrel Of Oil Equivalent DepletionPerBarrelOfOilEquivalent	26.56	USD
CY2012	gpor	Depletion Per Barrel Of Oil Equivalent DepletionPerBarrelOfOilEquivalent	35.07	USD
CY2010	gpor	Depletion Per Barrel Of Oil Equivalent DepletionPerBarrelOfOilEquivalent	19.54	USD
CY2010	gpor	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production Taxes DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionTaxes	136323000	USD
CY2011	gpor	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production Taxes DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionTaxes	124739000	USD
CY2012	gpor	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production Taxes DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionTaxes	89175000	USD
CY2012Q4	gpor	Employement Agreement Notice Period Allowed For Termination EmployementAgreementNoticePeriodAllowedForTermination	P90D
CY2012Q4	gpor	Employement Agreement Subsequent Extension EmployementAgreementSubsequentExtension	P1Y
CY2012Q4	gpor	Employement Agreement Term EmployementAgreementTerm	P3Y
CY2012	gpor	Foreign Currency Translation Gain Loss On Investment In Grizzly Oil Sands Ulc ForeignCurrencyTranslationGainLossOnInvestmentInGrizzlyOilSandsUlc	1355000	USD
CY2011	gpor	Foreign Currency Translation Gain Loss On Investment In Grizzly Oil Sands Ulc ForeignCurrencyTranslationGainLossOnInvestmentInGrizzlyOilSandsUlc	-855000	USD
CY2010	gpor	Foreign Currency Translation Gain Loss On Investment In Grizzly Oil Sands Ulc ForeignCurrencyTranslationGainLossOnInvestmentInGrizzlyOilSandsUlc	1313000	USD
CY2012	gpor	Foreign Currency Translation Gain Loss On Note Receivable Related Party ForeignCurrencyTranslationGainLossOnNoteReceivableRelatedParty		USD
CY2011	gpor	Foreign Currency Translation Gain Loss On Note Receivable Related Party ForeignCurrencyTranslationGainLossOnNoteReceivableRelatedParty	-1085000	USD
CY2010	gpor	Foreign Currency Translation Gain Loss On Note Receivable Related Party ForeignCurrencyTranslationGainLossOnNoteReceivableRelatedParty	942000	USD
CY2012	gpor	Future Development Costs Estimated To Be Spent In Year One FutureDevelopmentCostsEstimatedToBeSpentInYearOne	82772000	USD
CY2012	gpor	Future Development Costs Estimated To Be Spent In Year Three FutureDevelopmentCostsEstimatedToBeSpentInYearThree	4335000	USD
CY2012	gpor	Future Development Costs Estimated To Be Spent In Year Two FutureDevelopmentCostsEstimatedToBeSpentInYearTwo	16416000	USD
CY2012	gpor	Gas And Oil Area Reserve GasAndOilAreaReserve	243000	acre
CY2011	gpor	Gas Sales GasSales	3838000	USD
CY2012	gpor	Gas Sales GasSales	3225000	USD
CY2010	gpor	Gas Sales GasSales	3468000	USD
CY2010	gpor	Increase Decrease In Asset Retirement Obligation IncreaseDecreaseInAssetRetirementObligation	-1253000	USD
CY2012	gpor	Increase Decrease In Asset Retirement Obligation IncreaseDecreaseInAssetRetirementObligation	-2271000	USD
CY2011	gpor	Increase Decrease In Asset Retirement Obligation IncreaseDecreaseInAssetRetirementObligation	-248000	USD
CY2011	gpor	Interest Expense Debt Other InterestExpenseDebtOther	29000	USD
CY2012	gpor	Interest Expense Debt Other InterestExpenseDebtOther	57000	USD
CY2012	gpor	Interest Income Note Receivable InterestIncomeNoteReceivable	2000	USD
CY2010	gpor	Interest Income Note Receivable InterestIncomeNoteReceivable	267000	USD
CY2011	gpor	Interest Income Note Receivable InterestIncomeNoteReceivable	147000	USD
CY2010	gpor	Issuance Of Common Stock Through Exercise Of Warrants Value IssuanceOfCommonStockThroughExerciseOfWarrantsValue	206000	USD
CY2010	gpor	Natural Gas Liquids Sales NaturalGasLiquidsSales	2818000	USD
CY2012	gpor	Natural Gas Liquids Sales NaturalGasLiquidsSales	2668000	USD
CY2011	gpor	Natural Gas Liquids Sales NaturalGasLiquidsSales	3090000	USD
CY2012	gpor	Net Changes In Prices Production Costs And Development NetChangesInPricesProductionCostsAndDevelopment	108941000	USD
CY2010	gpor	Net Changes In Prices Production Costs And Development NetChangesInPricesProductionCostsAndDevelopment	122147000	USD
CY2011	gpor	Net Changes In Prices Production Costs And Development NetChangesInPricesProductionCostsAndDevelopment	136071000	USD
CY2011Q3	gpor	Number Of Financial Institutions NumberOfFinancialInstitutions	4	financial_institution
CY2012	gpor	Number Of Financial Institutions NumberOfFinancialInstitutions	4	financial_institution
CY2012	gpor	Number Of Purchasers NumberOfPurchasers	2	purchaser
CY2011	gpor	Oil And Condensate Sales OilAndCondensateSales	222025000	USD
CY2012	gpor	Oil And Condensate Sales OilAndCondensateSales	242708000	USD
CY2010	gpor	Oil And Condensate Sales OilAndCondensateSales	121350000	USD
	gpor	Oil And Gas Property Full Cost Method Gross Period Decrease OilAndGasPropertyFullCostMethodGrossPeriodDecrease	213000000	USD
CY2011Q4	gpor	Plugging And Abandonment Escrow Account PluggingAndAbandonmentEscrowAccount	3121000	USD
CY2012Q4	gpor	Plugging And Abandonment Escrow Account PluggingAndAbandonmentEscrowAccount	3113000	USD
CY2012Q4	gpor	Prepaid Drilling Costs PrepaidDrillingCosts	515000	USD
CY2011Q4	gpor	Prepaid Drilling Costs PrepaidDrillingCosts	228000	USD
CY2012	gpor	Proved Developed And Undeveloped Reserve Increase Decrease In Reserves ProvedDevelopedAndUndevelopedReserveIncreaseDecreaseInReserves	-12564	MBoe
CY2012	gpor	Proved Developed And Undeveloped Reserve Revisions Of Previous Estimates ProvedDevelopedAndUndevelopedReserveRevisionsOfPreviousEstimates	-442	MBoe
CY2012	gpor	Results Of Operations Income Tax Expense Current ResultsOfOperationsIncomeTaxExpenseCurrent	730000	USD
CY2010	gpor	Results Of Operations Income Tax Expense Current ResultsOfOperationsIncomeTaxExpenseCurrent	40000	USD
CY2011	gpor	Results Of Operations Income Tax Expense Current ResultsOfOperationsIncomeTaxExpenseCurrent	282000	USD
CY2012	gpor	Results Of Operations Income Tax Expense Deferred ResultsOfOperationsIncomeTaxExpenseDeferred	25633000	USD
CY2010	gpor	Results Of Operations Income Tax Expense Deferred ResultsOfOperationsIncomeTaxExpenseDeferred	0	USD
CY2011	gpor	Results Of Operations Income Tax Expense Deferred ResultsOfOperationsIncomeTaxExpenseDeferred	-372000	USD
CY2011Q1	gpor	Right Of Refusal Period Allowed RightOfRefusalPeriodAllowed	P6M
CY2012	gpor	Share Based Compensation Arrangement By Share Based Payment Award Expiration Period ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod	P10Y
CY2011	gpor	Total Costs Incurred In Oil And Gas Properties Acquisition And Development Activities TotalCostsIncurredInOilAndGasPropertiesAcquisitionAndDevelopmentActivities	265654000	USD
CY2010	gpor	Total Costs Incurred In Oil And Gas Properties Acquisition And Development Activities TotalCostsIncurredInOilAndGasPropertiesAcquisitionAndDevelopmentActivities	100524000	USD
CY2012	gpor	Total Costs Incurred In Oil And Gas Properties Acquisition And Development Activities TotalCostsIncurredInOilAndGasPropertiesAcquisitionAndDevelopmentActivities	755926000	USD
CY2011Q4	gpor	Total Other Assets TotalOtherAssets	91947000	USD
CY2012Q4	gpor	Total Other Assets TotalOtherAssets	394779000	USD
CY2010	gpor	Write Off Of Loan Commitment Fees WriteOffOfLoanCommitmentFees	0	USD
CY2011	gpor	Write Off Of Loan Commitment Fees WriteOffOfLoanCommitmentFees	0	USD
CY2012	gpor	Write Off Of Loan Commitment Fees WriteOffOfLoanCommitmentFees	1143000	USD
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0000874499
CY2013Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	77339886	shares
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2012Q2	dei	Entity Public Float EntityPublicFloat	1148840242.35	USD
CY2012	dei	Entity Registrant Name EntityRegistrantName	GULFPORT ENERGY CORP
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2012Q3	invest	Derivative Nonmonetary Notional Amount DerivativeNonmonetaryNotionalAmount	3000
CY2012Q4	invest	Derivative Nonmonetary Notional Amount DerivativeNonmonetaryNotionalAmount	4000
CY2011Q4	invest	Derivative Nonmonetary Notional Amount DerivativeNonmonetaryNotionalAmount	2000
CY2012Q1	invest	Derivative Nonmonetary Notional Amount DerivativeNonmonetaryNotionalAmount	2000
CY2010Q4	invest	Derivative Nonmonetary Notional Amount DerivativeNonmonetaryNotionalAmount	2300
CY2010Q1	invest	Derivative Nonmonetary Notional Amount DerivativeNonmonetaryNotionalAmount	3000

Files In Submission

Name	View Source	Status
0001445305-13-000396-index-headers.html	Edgar Link	pending
0001445305-13-000396-index.html	Edgar Link	pending
0001445305-13-000396.txt	Edgar Link	pending
0001445305-13-000396-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
gpor-12312012x10k.htm	Edgar Link	pending
gpor-20121231.xml	Edgar Link	completed
gpor-20121231.xsd	Edgar Link	pending
gpor-20121231xex21.htm	Edgar Link	pending
gpor-20121231xex231.htm	Edgar Link	pending
gpor-20121231xex232.htm	Edgar Link	pending
gpor-20121231xex233.htm	Edgar Link	pending
gpor-20121231xex234.htm	Edgar Link	pending
gpor-20121231xex311.htm	Edgar Link	pending
gpor-20121231xex312.htm	Edgar Link	pending
gpor-20121231xex321.htm	Edgar Link	pending
gpor-20121231xex322.htm	Edgar Link	pending
gpor-20121231xex992.htm	Edgar Link	pending
gpor-20121231_cal.xml	Edgar Link	unprocessable
gpor-20121231_def.xml	Edgar Link	unprocessable
gpor-20121231_lab.xml	Edgar Link	unprocessable
gpor-20121231_pre.xml	Edgar Link	unprocessable
gpor-20121331xex991.htm	Edgar Link	pending
nsaigulfporttotalprov_image1.gif	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R86.htm	Edgar Link	pending
R87.htm	Edgar Link	pending
R88.htm	Edgar Link	pending
R89.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$GPOR
GULFPORT ENERGY CORP Stock $gpor

2012 Q4 Form 10-K Financial Statement

#000144530513000396 Filed on March 01, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GPOR GULFPORT ENERGY CORP Stock $gpor

2012 Q4 Form 10-K Financial Statement

#000144530513000396 Filed on March 01, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GPOR
GULFPORT ENERGY CORP Stock $gpor