$GPOR
GULFPORT ENERGY CORP Stock $gpor

$gpor Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-Q Financial Statement

#000162828020016083 Filed on November 09, 2020

Income Statement

Concept	2020 Q4	2020 Q3	2019 Q3
Revenue	$244.7M	$136.2M	$341.7M
YoY Change	-27.27%	-60.15%	-5.32%
Cost Of Revenue	$23.37M	$110.6M	$135.0M
YoY Change	-3.91%	-18.1%	71.08%
Gross Profit	$221.4M	$25.61M	$206.7M
YoY Change	-13.85%	-87.61%	-26.7%
Gross Profit Margin	90.45%	18.81%	60.5%
Selling, General & Admin	$134.3M	$131.1M	$148.2M
YoY Change	68.97%	-11.55%	56.4%
% of Gross Profit	60.68%	511.89%	71.69%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$45.38M	$51.55M	$163.3M
YoY Change	-68.37%	-68.43%	36.15%
% of Gross Profit	20.5%	201.3%	78.97%
Operating Expenses	$180.5M	$183.4M	$304.0M
YoY Change	-19.32%	-39.67%	22.89%
Operating Profit	$19.63M	-$346.4M	-$571.0M
YoY Change	-101.36%	-39.33%	-595.98%
Interest Expense	-$20.34M	$34.32M	$35.56M
YoY Change	-75.87%	-3.47%	6.93%
% of Operating Profit	-103.6%
Other Income/Expense, Net	-$12.50M	-$34.56M	-$57.89M
YoY Change	-39159.38%	-40.3%	214.2%
Pretax Income	-$165.6M	-$381.0M	-$628.8M
YoY Change	-88.95%	-39.42%	-760.9%
Income Tax	$0.00	$0.00	-$144.0M
% Of Pretax Income
Net Earnings	-$165.6M	-$381.0M	-$484.8M
YoY Change	-90.88%	-21.42%	-609.51%
Net Earnings / Revenue	-67.65%	-279.76%	-141.86%
Basic Earnings Per Share	-$1.03	-$2.37	-$3.04
Diluted Earnings Per Share	-$1.03	-$2.37	-$3.04
COMMON SHARES
Basic Shares Outstanding	160.8M shares	160.7M shares	159.5M shares
Diluted Shares Outstanding		160.7M shares	159.5M shares

Balance Sheet

Concept	2020 Q4	2020 Q3	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$89.86M	$51.04M	$10.12M
YoY Change	1382.85%	404.18%	-91.87%
Cash & Equivalents	$89.86M	$51.04M	$10.12M
Short-Term Investments
Other Short-Term Assets	$187.8M	$57.43M	$140.2M
YoY Change	43.77%	-59.04%	374.53%
Inventory
Prepaid Expenses
Receivables	$119.9M	$92.44M	$112.7M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$409.8M	$216.3M	$304.3M
YoY Change	33.96%	-28.91%	-13.32%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.086B	$2.103B	$5.585B
YoY Change	-39.77%	-62.35%	1.12%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$24.82M	$16.56M	$73.96M
YoY Change	-22.56%	-77.61%	-68.19%
Other Assets	$18.37M	$37.03M	$11.65M
YoY Change	18.22%	217.76%	-31.61%
Total Long-Term Assets	$2.130B	$2.159B	$5.969B
YoY Change	-40.45%	-63.82%	3.19%
TOTAL ASSETS
Total Short-Term Assets	$409.8M	$216.3M	$304.3M
Total Long-Term Assets	$2.130B	$2.159B	$5.969B
Total Assets	$2.540B	$2.376B	$6.273B
YoY Change	-34.59%	-62.13%	2.25%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$244.9M	$295.4M	$439.0M
YoY Change	-41.02%	-32.72%	-24.63%
Accrued Expenses	$0.00	$1.757M	$33.87M
YoY Change	-100.0%	-94.81%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$253.7M	$656.0K	$622.0K
YoY Change	40112.84%	5.47%	-3.86%
Total Short-Term Liabilities	$510.3M	$321.9M	$473.9M
YoY Change	13.1%	-32.07%	-26.62%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$2.068B	$2.077B
YoY Change	-100.0%	-0.41%	-1.15%
Other Long-Term Liabilities	$2.330B	$127.0M	$160.4M
YoY Change	1614.78%	-20.81%
Total Long-Term Liabilities	$36.60M	$2.068B	$2.077B
YoY Change	-98.27%	-0.41%	-1.15%
TOTAL LIABILITIES
Total Short-Term Liabilities	$510.3M	$321.9M	$473.9M
Total Long-Term Liabilities	$36.60M	$2.068B	$2.077B
Total Liabilities	$2.840B	$2.520B	$2.714B
YoY Change	10.6%	-7.14%	-4.54%
SHAREHOLDERS EQUITY
Retained Earnings	-$4.473B	-$4.307B	-$596.9M
YoY Change	57.07%	621.58%	-39.05%
Common Stock	$1.607M	$1.607M	$1.597M
YoY Change	0.63%	0.63%	-7.79%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	-$300.5M	-$144.8M	$3.123B
YoY Change
Total Liabilities & Shareholders Equity	$2.540B	$2.376B	$6.273B
YoY Change	-34.59%	-62.13%	2.25%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2019 Q3
OPERATING ACTIVITIES
Net Income	-$165.6M	-$381.0M	-$484.8M
YoY Change	-90.88%	-21.42%	-609.51%
Depreciation, Depletion And Amortization	$45.38M	$51.55M	$163.3M
YoY Change	-68.37%	-68.43%	36.15%
Cash From Operating Activities	-$104.7M	-$47.22M	$217.6M
YoY Change	-198.18%	-121.7%	-1.01%
INVESTING ACTIVITIES
Capital Expenditures	-$28.72M	-$63.14M	-$138.6M
YoY Change	-61.11%	-54.45%	-30.08%
Acquisitions
YoY Change
Other Investing Activities	$4.826M	$2.538M	$10.19M
YoY Change	-87.21%	-75.1%	145.5%
Cash From Investing Activities	-$23.89M	-$60.61M	-$128.4M
YoY Change	-33.86%	-52.81%	-33.83%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	167.4M	156.1M	-99.82M
YoY Change	-324.47%	-256.34%	391.78%
NET CHANGE
Cash From Operating Activities	-104.7M	-47.22M	217.6M
Cash From Investing Activities	-23.89M	-60.61M	-128.4M
Cash From Financing Activities	167.4M	156.1M	-99.82M
Net Change In Cash	38.82M	48.23M	-10.65M
YoY Change	-1055.17%	-552.7%	-296.77%
FREE CASH FLOW
Cash From Operating Activities	-$104.7M	-$47.22M	$217.6M
Capital Expenditures	-$28.72M	-$63.14M	-$138.6M
Free Cash Flow	-$75.98M	$15.92M	$356.2M
YoY Change	-142.1%	-95.53%	-14.79%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
	dei	Amendment Flag AmendmentFlag	false
	dei	Entity Central Index Key EntityCentralIndexKey	0000874499
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2020-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-19514
	dei	Entity Registrant Name EntityRegistrantName	Gulfport Energy Corp
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	73-1521290
	dei	Entity Address Address Line1 EntityAddressAddressLine1	3001 Quail Springs Parkway
	dei	Entity Address City Or Town EntityAddressCityOrTown	Oklahoma City,
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000.0	shares
CY2020Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	160800000	shares
CY2020Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	160800000	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	159700000	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	159700000	shares
CY2020Q3	us-gaap	Common Stock Value CommonStockValue	1607000	USD
CY2020Q3	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	15421000	USD
CY2019Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	47975000	USD
CY2020Q3	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	51187000	USD
CY2019Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	4431000	USD
CY2020Q3	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	6245000	USD
CY2019Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	126201000	USD
CY2020Q3	us-gaap	Assets Current AssetsCurrent	216339000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	305877000	USD
CY2020Q3	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	1526941000	USD
CY2019Q4	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	1686666000	USD
CY2020Q3	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	10786305000	USD
CY2019Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	10595735000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	95921000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	96719000	USD
CY2020Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	8779704000	USD
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CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2102522000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3463794000	USD
CY2020Q3	us-gaap	Equity Method Investments EquityMethodInvestments	16560000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	32044000	USD
CY2020Q3	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	1098000	USD
CY2019Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	563000	USD
CY2020Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	0	USD
CY2019Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	7563000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2012000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	14168000	USD
CY2020Q3	gpor	Operating Lease Rightof Use Asset Related Parties OperatingLeaseRightofUseAssetRelatedParties	0	USD
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CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	15540000	USD
CY2020Q3	gpor	Total Other Assets TotalOtherAssets	56698000	USD
CY2019Q4	gpor	Total Other Assets TotalOtherAssets	113148000	USD
CY2020Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	3371000	USD
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CY2019Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	415218000	USD
CY2020Q3	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	24164000	USD
CY2019Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	303000	USD
CY2020Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1757000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	13826000	USD
CY2020Q3	gpor	Operating Lease Liability Current Related Parties OperatingLeaseLiabilityCurrentRelatedParties	0	USD
CY2019Q4	gpor	Operating Lease Liability Current Related Parties OperatingLeaseLiabilityCurrentRelatedParties	21220000	USD
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CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	631000	USD
CY2020Q3	us-gaap	Liabilities Current LiabilitiesCurrent	321936000	USD
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CY2020Q3	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	63803000	USD
CY2019Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	53135000	USD
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CY2020Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	255000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	342000	USD
CY2020Q3	gpor	Operating Lease Liability Noncurrent Related Parties OperatingLeaseLiabilityNoncurrentRelatedParties	0	USD
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CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1978020000	USD
CY2020Q3	us-gaap	Liabilities Liabilities	2520336000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	2568227000	USD
CY2020Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
	dei	City Area Code CityAreaCode	405
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CY2020Q3	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	30000	shares
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	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.12
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	dei	Entity Address State Or Province EntityAddressStateOrProvince	OK
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	73134
	dei	Local Phone Number LocalPhoneNumber	252-4600
	dei	Security12b Title Security12bTitle	Common stock, par value $0.01 per share
	dei	Trading Symbol TradingSymbol	GPOR
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
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	us-gaap	Operating Lease Expense OperatingLeaseExpense	46946000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	64668000	USD
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	us-gaap	Costs And Expenses CostsAndExpenses	2004052000	USD
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	us-gaap	Interest Expense InterestExpense	99677000	USD
CY2020Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	52000	USD
CY2019Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	338000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	282000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	649000	USD
CY2020Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	23600000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	49579000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	23600000	USD
CY2020Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-153000	USD
CY2019Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-43082000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-10987000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-164391000	USD
CY2020Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-141000	USD
CY2019Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-3194000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-9239000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-3757000	USD
CY2020Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-34563000	USD
CY2019Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-57894000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-70042000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-251494000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-380963000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-628849000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1452279000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-510982000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-144047000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7290000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-323378000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-380963000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-484802000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-1459569000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-187604000	USD
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.37
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-3.04
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-9.12
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.17
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.37
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-3.04
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-9.12
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.17
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	160683000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	159548000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	160053000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	160554000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	160683000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	159548000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	160053000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	160554000	shares
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-484802000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-1459569000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-187604000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	3661000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-2064000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-4497000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	5347000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3661000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2064000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4497000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	5347000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-377302000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-486866000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-1464066000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-182257000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1314592000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-517538000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-15030000	USD
CY2020Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2104000	USD
CY2020Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	79000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	784049000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	-561068000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	6872000	USD
CY2020Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1515000	USD
CY2020Q2	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	28000	USD
CY2020Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	231340000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-380963000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3661000	USD
CY2020Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1314000	USD
CY2020Q3	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	129000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	-144777000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	3327768000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	62242000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3801000	USD
CY2019Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2785000	USD
CY2019Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	28330000	USD
CY2019Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	3368266000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	234956000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3610000	USD
CY2019Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2846000	USD
CY2019Q2	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	2270000	USD
CY2019Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	3607408000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-484802000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2064000	USD
CY2019Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2651000	USD
CY2019Q3	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	89000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	3123104000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-1459569000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-187604000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	194369000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	406654000	USD
	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	1357099000	USD
	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	571442000	USD
	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-10987000	USD
	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-164532000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	49579000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	23600000	USD
	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	71414000	USD
	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	178169000	USD
	gpor	Cash Settlement On Derivative Instruments CashSettlementOnDerivativeInstruments	225364000	USD
	gpor	Cash Settlement On Derivative Instruments CashSettlementOnDerivativeInstruments	80744000	USD
	gpor	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	7290000	USD
	gpor	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	-323378000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	12753000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	15242000	USD
	gpor	Increase Decreasein Accounts Receivable Oiland Natural Gas IncreaseDecreaseinAccountsReceivableOilandNaturalGas	-28767000	USD
	gpor	Increase Decreasein Accounts Receivable Oiland Natural Gas IncreaseDecreaseinAccountsReceivableOilandNaturalGas	-97543000	USD
	gpor	Increase Decreasein Accounts Receivable Joint Operationsand Other IncreaseDecreaseinAccountsReceivableJointOperationsandOther	-32827000	USD
	gpor	Increase Decreasein Accounts Receivable Joint Operationsand Other IncreaseDecreaseinAccountsReceivableJointOperationsandOther	18830000	USD
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	45620000	USD
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-4359000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-40552000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	8567000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	2721000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	147000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	200001000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	617355000	USD
	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	337979000	USD
	gpor	Decrease In Capital Spending Percentage DecreaseInCapitalSpendingPercentage	0.50
	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	646535000	USD
	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	46932000	USD
	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	10864000	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	591000	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	4694000	USD
	us-gaap	Proceeds From Sale Of Other Property Plant And Equipment ProceedsFromSaleOfOtherPropertyPlantAndEquipment	942000	USD
	us-gaap	Proceeds From Sale Of Other Property Plant And Equipment ProceedsFromSaleOfOtherPropertyPlantAndEquipment	204000	USD
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	432000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	0	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	1945000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-290696000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-638648000	USD
	us-gaap	Repayments Of Debt RepaymentsOfDebt	372484000	USD
	us-gaap	Repayments Of Debt RepaymentsOfDebt	550500000	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	531857000	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	640000000	USD
	us-gaap	Early Repayment Of Senior Debt EarlyRepaymentOfSeniorDebt	22827000	USD
	us-gaap	Early Repayment Of Senior Debt EarlyRepaymentOfSeniorDebt	79480000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	30000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-868000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-900000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	135678000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-20880000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	44983000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-42173000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6060000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	52297000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	51043000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	10124000	USD
	us-gaap	Interest Paid Net InterestPaidNet	73979000	USD
	us-gaap	Interest Paid Net InterestPaidNet	85272000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	0	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-1794000	USD
	gpor	Capitalized Stock Based Compensation CapitalizedStockBasedCompensation	2189000	USD
	gpor	Capitalized Stock Based Compensation CapitalizedStockBasedCompensation	3313000	USD
	gpor	Asset Retirement Obligation Liabilities Incurred Including Revisionof Estimate AssetRetirementObligationLiabilitiesIncurredIncludingRevisionofEstimate	2343000	USD
	gpor	Asset Retirement Obligation Liabilities Incurred Including Revisionof Estimate AssetRetirementObligationLiabilitiesIncurredIncludingRevisionofEstimate	6846000	USD
	gpor	Asset Retirement Obligation Removed Due To Divestiture AssetRetirementObligationRemovedDueToDivestiture	2033000	USD
	gpor	Asset Retirement Obligation Removed Due To Divestiture AssetRetirementObligationRemovedDueToDivestiture	30035000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	907000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	2782000	USD
	gpor	Noncashor Part Noncash Acquisition Contingent Consideration NoncashorPartNoncashAcquisitionContingentConsideration	23090000	USD
	gpor	Noncashor Part Noncash Acquisition Contingent Consideration NoncashorPartNoncashAcquisitionContingentConsideration	1137000	USD
	gpor	Foreign Currency Translation Gain Loss On Investment In Equity Method Investment ForeignCurrencyTranslationGainLossOnInvestmentInEquityMethodInvestment	-4497000	USD
	gpor	Foreign Currency Translation Gain Loss On Investment In Equity Method Investment ForeignCurrencyTranslationGainLossOnInvestmentInEquityMethodInvestment	5347000	USD
CY2020Q3	us-gaap	Oil And Gas Property Full Cost Method Depletion OilAndGasPropertyFullCostMethodDepletion	8735750000	USD
CY2019Q4	us-gaap	Oil And Gas Property Full Cost Method Depletion OilAndGasPropertyFullCostMethodDepletion	7191957000	USD
CY2020Q3	us-gaap	Long Term Debt LongTermDebt	2100000000	USD
CY2019Q3	us-gaap	Revenues Revenues	341746000	USD
CY2019Q3	us-gaap	Cost Of Revenue CostOfRevenue	135006000	USD
CY2019Q3	us-gaap	Costs And Expenses CostsAndExpenses	912701000	USD
	us-gaap	Revenues Revenues	1226658000	USD
	us-gaap	Cost Of Revenue CostOfRevenue	382643000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	1486146000	USD
CY2020Q3	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	10786305000	USD
CY2019Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	10595735000	USD
CY2020Q3	us-gaap	Oil And Gas Property Full Cost Method Net OilAndGasPropertyFullCostMethodNet	2050555000	USD
CY2019Q4	us-gaap	Oil And Gas Property Full Cost Method Net OilAndGasPropertyFullCostMethodNet	3403778000	USD
CY2020Q3	gpor	Property Plantand Equipment Other Gross Excluding Land PropertyPlantandEquipmentOtherGrossExcludingLand	91101000	USD
CY2019Q4	gpor	Property Plantand Equipment Other Gross Excluding Land PropertyPlantandEquipmentOtherGrossExcludingLand	91198000	USD
CY2020Q3	us-gaap	Land Land	4820000	USD
CY2019Q4	us-gaap	Land Land	5521000	USD
CY2020Q3	gpor	Property Plantand Equipment Other Accumulated Depreciation Depletion And Amortization PropertyPlantandEquipmentOtherAccumulatedDepreciationDepletionAndAmortization	43954000	USD
CY2019Q4	gpor	Property Plantand Equipment Other Accumulated Depreciation Depletion And Amortization PropertyPlantandEquipmentOtherAccumulatedDepreciationDepletionAndAmortization	36703000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	51967000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	60016000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2102522000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3463794000	USD
CY2020Q3	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	270900000	USD
	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	1400000000	USD
	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	571400000	USD
CY2020Q3	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	6200000	USD
	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	19800000	USD
CY2019Q3	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	9800000	USD
	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	26300000	USD
CY2020Q3	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	1526941000	USD
CY2019Q4	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	1700000000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	60355000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	79952000	USD
	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	2343000	USD
	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	5769000	USD
	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	0	USD
	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	117000	USD
	gpor	Asset Retirement Obligation Removed Due To Divestiture AssetRetirementObligationRemovedDueToDivestiture	2033000	USD
	gpor	Asset Retirement Obligation Removed Due To Divestiture AssetRetirementObligationRemovedDueToDivestiture	30035000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	2270000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	3173000	USD
	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	0	USD
	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	1077000	USD
CY2020Q3	us-gaap	Asset Retirement Obligation AssetRetirementObligation	62935000	USD
CY2019Q3	us-gaap	Asset Retirement Obligation AssetRetirementObligation	59819000	USD
CY2020Q1	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	50000000.0	USD
CY2020Q1	gpor	Sale Of Assets Incentive Payments Term SaleOfAssetsIncentivePaymentsTerm	P15Y
CY2020Q1	gpor	Contingent Consideration Asset Fair Value ContingentConsiderationAssetFairValue	23100000	USD
	us-gaap	Disposal Group Not Discontinued Operation Gain Loss On Disposal DisposalGroupNotDiscontinuedOperationGainLossOnDisposal	0	USD
CY2020Q3	us-gaap	Equity Method Investments EquityMethodInvestments	16560000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	32044000	USD
CY2020Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-153000	USD
CY2019Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-43082000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-10987000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-164391000	USD
CY2020Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	19772000	USD
CY2019Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	23751000	USD
CY2020Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	656000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	631000	USD
CY2020Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2068036000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1978020000	USD
CY2020Q3	gpor	Interest Cost Capitalized Undeveloped Properties InterestCostCapitalizedUndevelopedProperties	200000	USD
	gpor	Interest Cost Capitalized Undeveloped Properties InterestCostCapitalizedUndevelopedProperties	900000	USD
CY2019Q3	gpor	Interest Cost Capitalized Undeveloped Properties InterestCostCapitalizedUndevelopedProperties	1000000.0	USD
	gpor	Interest Cost Capitalized Undeveloped Properties InterestCostCapitalizedUndevelopedProperties	2800000	USD
CY2019Q4	us-gaap	Debt Instrument Repurchase Amount DebtInstrumentRepurchaseAmount	200000000	USD
CY2019Q1	us-gaap	Stock Repurchase Program Period In Force1 StockRepurchaseProgramPeriodInForce1	P24M
CY2020Q3	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	136000	shares
	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	243000	shares
CY2020Q3	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	100000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	200000	USD
CY2019Q3	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	36000	shares
	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	123000	shares
CY2019Q3	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	100000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	700000	USD
CY2020Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8900000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	13200000	USD
CY2020Q3	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	300000	USD
	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	2200000	USD
CY2019Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2700000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8300000	USD
CY2019Q3	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	1100000	USD
	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	3300000	USD
	gpor	Sharebased Compensation Arrangementby Sharebased Payment Award Relative Total Shareholder Return Target Award Minimum SharebasedCompensationArrangementbySharebasedPaymentAwardRelativeTotalShareholderReturnTargetAwardMinimum	0
	gpor	Sharebased Compensation Arrangementby Sharebased Payment Award Relative Total Shareholder Return Target Award Maximum SharebasedCompensationArrangementbySharebasedPaymentAwardRelativeTotalShareholderReturnTargetAwardMaximum	2
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-380963000	USD
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	160682629	shares
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.37
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-484802000	USD
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	159548477	shares
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-3.04
CY2020Q3	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
CY2020Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2019Q3	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
CY2019Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-380963000	USD
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	160682629	shares
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.37
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-484802000	USD
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	159548477	shares
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-3.04
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-1459569000	USD
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	160053093	shares
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-9.12
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-187604000	USD
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	160553796	shares
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.17
	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-1459569000	USD
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	160053093	shares
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-9.12
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-187604000	USD
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	160553796	shares
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.17
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2020Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2019Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2073638	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	4266206	shares
CY2020Q3	gpor	Supply Commitment Remainderof Fiscal Year SupplyCommitmentRemainderofFiscalYear	286000	MMBTU
CY2020Q3	gpor	Supply Commitment Due In Year One SupplyCommitmentDueInYearOne	183000	MMBTU
CY2020Q3	gpor	Supply Commitment Due In Year Two SupplyCommitmentDueInYearTwo	70000	MMBTU
CY2020Q3	gpor	Supply Commitment Due In Year Three SupplyCommitmentDueInYearThree	17000	MMBTU
CY2020Q3	gpor	Supply Commitment Total SupplyCommitmentTotal	556000	MMBTU
CY2020Q3	us-gaap	Other Commitments Future Minimum Payments Remainder Of Fiscal Year OtherCommitmentsFutureMinimumPaymentsRemainderOfFiscalYear	1875000	USD
CY2020Q3	us-gaap	Other Commitment Due In Next Twelve Months OtherCommitmentDueInNextTwelveMonths	7500000	USD
CY2020Q3	us-gaap	Other Commitment OtherCommitment	9375000	USD
	us-gaap	Loss Contingency New Claims Filed Number LossContingencyNewClaimsFiledNumber	2	complaint
CY2020Q2	gpor	Loss Contingency Damages Sought Percentage Of Unpaid Overtime Compensation LossContingencyDamagesSoughtPercentageOfUnpaidOvertimeCompensation	0.06
CY2018Q4	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	180000	USD
CY2020Q3	gpor	Derivative Credit Risk Related Contingent Features Payment To Be Received Denominator DerivativeCreditRiskRelatedContingentFeaturesPaymentToBeReceivedDenominator	8.03
CY2020Q3	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	-80624000	USD
CY2019Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	73326000	USD
CY2020Q3	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-53823000	USD
CY2019Q3	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	27074000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	71414000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	178169000	USD
CY2020Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	7343000	USD
CY2020Q3	us-gaap	Derivative Asset Not Offset Policy Election Deduction DerivativeAssetNotOffsetPolicyElectionDeduction	6948000	USD
CY2020Q3	us-gaap	Derivative Asset Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	395000	USD
CY2020Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	87967000	USD
CY2020Q3	us-gaap	Derivative Liability Not Offset Policy Election Deduction DerivativeLiabilityNotOffsetPolicyElectionDeduction	6948000	USD
CY2020Q3	us-gaap	Derivative Liability Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	81019000	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	126764000	USD
CY2019Q4	us-gaap	Derivative Asset Not Offset Policy Election Deduction DerivativeAssetNotOffsetPolicyElectionDeduction	53438000	USD
CY2019Q4	us-gaap	Derivative Asset Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	73326000	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	53438000	USD
CY2019Q4	us-gaap	Derivative Liability Not Offset Policy Election Deduction DerivativeLiabilityNotOffsetPolicyElectionDeduction	53438000	USD
CY2019Q4	us-gaap	Derivative Liability Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	0	USD
CY2020Q3	us-gaap	Restructuring And Related Cost Number Of Positions Eliminated Inception To Date Percent RestructuringAndRelatedCostNumberOfPositionsEliminatedInceptionToDatePercent	0.10
	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	2300000	USD
CY2020Q3	us-gaap	Severance Costs1 SeveranceCosts1	1460000	USD
	us-gaap	Severance Costs1 SeveranceCosts1	1460000	USD
CY2020Q3	us-gaap	Other Restructuring Costs OtherRestructuringCosts	7524000	USD
	us-gaap	Other Restructuring Costs OtherRestructuringCosts	8141000	USD
CY2020Q3	us-gaap	Restructuring Costs RestructuringCosts	8984000	USD
	us-gaap	Restructuring Costs RestructuringCosts	9601000	USD
	gpor	Contingent Consideration Asset Fair Value ContingentConsiderationAssetFairValue	19700000	USD
CY2020Q3	gpor	Contingent Consideration Change In Amount Asset ContingentConsiderationChangeInAmountAsset	-200000	USD
	gpor	Contingent Consideration Change In Amount Asset ContingentConsiderationChangeInAmountAsset	-3100000	USD
	gpor	Contingent Consideration Asset Settlements ContingentConsiderationAssetSettlements	300000	USD
CY2020Q3	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	92400000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	121200000	USD
	us-gaap	Revenue Performance Obligation Description Of Timing RevenuePerformanceObligationDescriptionOfTiming	However, settlement statements for certain sales may be received for 30 to 90 days after the date production is delivered, and as a result, the Company is required to estimate the amount of production that was delivered to the purchaser and the price that will be received for the sale of the product
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	1664000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	142000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	115000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	90000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	30000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	2041000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	29000	USD
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	2012000	USD
CY2020Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	1692000	USD
CY2019Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	4551000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	7970000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	20835000	USD
CY2020Q3	gpor	Operating Lease Cost Related Party OperatingLeaseCostRelatedParty	0	USD
CY2019Q3	gpor	Operating Lease Cost Related Party OperatingLeaseCostRelatedParty	5610000	USD
	gpor	Operating Lease Cost Related Party OperatingLeaseCostRelatedParty	0	USD
	gpor	Operating Lease Cost Related Party OperatingLeaseCostRelatedParty	16830000	USD
CY2020Q3	us-gaap	Variable Lease Cost VariableLeaseCost	245000	USD
CY2019Q3	us-gaap	Variable Lease Cost VariableLeaseCost	105000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	705000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	1065000	USD
CY2020Q3	gpor	Variable Lease Cost Related Party VariableLeaseCostRelatedParty	0	USD
CY2019Q3	gpor	Variable Lease Cost Related Party VariableLeaseCostRelatedParty	5357000	USD
	gpor	Variable Lease Cost Related Party VariableLeaseCostRelatedParty	0	USD
	gpor	Variable Lease Cost Related Party VariableLeaseCostRelatedParty	64968000	USD
CY2020Q3	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2259000	USD
CY2019Q3	us-gaap	Short Term Lease Cost ShortTermLeaseCost	224000	USD
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	7698000	USD
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	407000	USD
CY2020Q3	us-gaap	Lease Cost LeaseCost	4196000	USD
CY2019Q3	us-gaap	Lease Cost LeaseCost	15847000	USD
	us-gaap	Lease Cost LeaseCost	16373000	USD
	us-gaap	Lease Cost LeaseCost	104105000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	109000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	146000	USD
	us-gaap	Operating Lease Payments Use OperatingLeasePaymentsUse	9786000	USD
	us-gaap	Operating Lease Payments Use OperatingLeasePaymentsUse	18998000	USD
	gpor	Operating Lease Payments Use Related Party OperatingLeasePaymentsUseRelatedParty	6800000	USD
	gpor	Operating Lease Payments Use Related Party OperatingLeasePaymentsUseRelatedParty	78518000	USD
CY2020Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P0Y9M21D
CY2020Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0265
CY2020Q1	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	7300000	USD
	gpor	Testing Period Section382a TestingPeriodSection382a	P3Y
CY2020Q2	gpor	Tax Benefits Preservation Plan Maximum Percentage Of Companys Securities Allowed To Be Owned By Third Party TaxBenefitsPreservationPlanMaximumPercentageOfCompanysSecuritiesAllowedToBeOwnedByThirdParty	0.049
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	51043000	USD
CY2020Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	92443000	USD
CY2020Q3	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	15421000	USD
CY2020Q3	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	0	USD
CY2020Q3	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	51187000	USD
CY2020Q3	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	6245000	USD
CY2020Q3	us-gaap	Assets Current AssetsCurrent	216339000	USD
CY2020Q3	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	10786305000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	95921000	USD
CY2020Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	8779704000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2102522000	USD
CY2020Q3	us-gaap	Equity Method Investments EquityMethodInvestments	16560000	USD
CY2020Q3	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	1098000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2012000	USD
CY2020Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	37028000	USD
CY2020Q3	gpor	Total Other Assets TotalOtherAssets	56698000	USD
CY2020Q3	us-gaap	Assets Assets	2375559000	USD
CY2020Q3	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	295359000	USD
CY2020Q3	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2020Q3	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	24164000	USD
CY2020Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1757000	USD
CY2020Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	656000	USD
CY2020Q3	us-gaap	Liabilities Current LiabilitiesCurrent	321936000	USD
CY2020Q3	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	63803000	USD
CY2020Q3	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	62935000	USD
CY2020Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	3371000	USD
CY2020Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	255000	USD
CY2020Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2068036000	USD
CY2020Q3	us-gaap	Liabilities Liabilities	2520336000	USD
CY2020Q3	us-gaap	Common Stock Value CommonStockValue	1607000	USD
CY2020Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	4212241000	USD
CY2020Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-51330000	USD
CY2020Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-4307295000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	-144777000	USD
CY2020Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2375559000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6060000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	121210000	USD
CY2019Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	47975000	USD
CY2019Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	0	USD
CY2019Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	4431000	USD
CY2019Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	126201000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	305877000	USD
CY2019Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	10595735000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	96719000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	7228660000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3463794000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	32044000	USD
CY2019Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	563000	USD
CY2019Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	7563000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	14168000	USD
CY2019Q4	gpor	Operating Lease Rightof Use Asset Related Parties OperatingLeaseRightofUseAssetRelatedParties	43270000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	15540000	USD
CY2019Q4	gpor	Total Other Assets TotalOtherAssets	113148000	USD
CY2019Q4	us-gaap	Assets Assets	3882819000	USD
CY2019Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	415218000	USD
CY2019Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2019Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	303000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	13826000	USD
CY2019Q4	gpor	Operating Lease Liability Current Related Parties OperatingLeaseLiabilityCurrentRelatedParties	21220000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	631000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	451198000	USD
CY2019Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	53135000	USD
CY2019Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	60355000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	3127000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	342000	USD
CY2019Q4	gpor	Operating Lease Liability Noncurrent Related Parties OperatingLeaseLiabilityNoncurrentRelatedParties	22050000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1978020000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	2568227000	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	1597000	USD
CY2019Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	4207554000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-46833000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-2847726000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1314592000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3882819000	USD
CY2020Q3	us-gaap	Revenues Revenues	136176000	USD
CY2020Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	15274000	USD
CY2020Q3	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	4028000	USD
CY2020Q3	us-gaap	Cost Of Revenue CostOfRevenue	110567000	USD
CY2020Q3	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	51551000	USD
CY2020Q3	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	270874000	USD
CY2020Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	20524000	USD
CY2020Q3	us-gaap	Restructuring Charges RestructuringCharges	8984000	USD
CY2020Q3	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	774000	USD
CY2020Q3	us-gaap	Costs And Expenses CostsAndExpenses	482576000	USD
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-346400000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	34321000	USD
CY2020Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	52000	USD
CY2020Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-153000	USD
CY2020Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-141000	USD
CY2020Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-34563000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-380963000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-380963000	USD
CY2019Q3	us-gaap	Revenues Revenues	341746000	USD
CY2019Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	22473000	USD
CY2019Q3	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	6565000	USD
CY2019Q3	us-gaap	Cost Of Revenue CostOfRevenue	135006000	USD
CY2019Q3	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	163270000	USD
CY2019Q3	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	571442000	USD
CY2019Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	13198000	USD
CY2019Q3	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	747000	USD
CY2019Q3	us-gaap	Costs And Expenses CostsAndExpenses	912701000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-570955000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	35556000	USD
CY2019Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	338000	USD
CY2019Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	23600000	USD
CY2019Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-43082000	USD
CY2019Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-3194000	USD
CY2019Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-57894000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-628849000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-144047000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-484802000	USD
	us-gaap	Revenues Revenues	621815000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	46946000	USD
	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	12432000	USD
	us-gaap	Cost Of Revenue CostOfRevenue	334789000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	194369000	USD
	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	1357099000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	46546000	USD
	us-gaap	Restructuring Charges RestructuringCharges	9601000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	2270000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	2004052000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	-1382237000	USD
	us-gaap	Interest Expense InterestExpense	99677000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	282000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	49579000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-10987000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-9239000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-70042000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1452279000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7290000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-1459569000	USD
	us-gaap	Revenues Revenues	1226658000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	64668000	USD
	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	22584000	USD
	us-gaap	Cost Of Revenue CostOfRevenue	382643000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	406654000	USD
	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	571442000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	34982000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	3173000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	1486146000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	-259488000	USD
	us-gaap	Interest Expense InterestExpense	107595000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	649000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	23600000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-164391000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-3757000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-251494000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-510982000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-323378000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-187604000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-380963000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	3661000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3661000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-377302000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-484802000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-2064000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2064000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-486866000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-1459569000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-4497000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4497000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-1464066000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-187604000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	5347000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	5347000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-182257000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	200001000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-290696000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	135678000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	44983000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6060000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	51043000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	617355000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-638648000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-42173000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-20880000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	52297000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	10124000	USD

Files In Submission

Name	View Source	Status
0001628280-20-016083-index-headers.html	Edgar Link	pending
0001628280-20-016083-index.html	Edgar Link	pending
0001628280-20-016083.txt	Edgar Link	pending
0001628280-20-016083-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
gpor-09302020xex311.htm	Edgar Link	pending
gpor-09302020xex312.htm	Edgar Link	pending
gpor-09302020xex321.htm	Edgar Link	pending
gpor-09302020xex322.htm	Edgar Link	pending
gpor-20200930.htm	Edgar Link	pending
gpor-20200930.xsd	Edgar Link	pending
gpor-20200930_cal.xml	Edgar Link	unprocessable
gpor-20200930_def.xml	Edgar Link	unprocessable
gpor-20200930_htm.xml	Edgar Link	completed
gpor-20200930_lab.xml	Edgar Link	unprocessable
gpor-20200930_pre.xml	Edgar Link	unprocessable
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$GPOR
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2020 Q4 Form 10-Q Financial Statement

#000162828020016083 Filed on November 09, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GPOR GULFPORT ENERGY CORP Stock $gpor

2020 Q4 Form 10-Q Financial Statement

#000162828020016083 Filed on November 09, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GPOR
GULFPORT ENERGY CORP Stock $gpor