$GPOR
GULFPORT ENERGY CORP Stock $gpor

$gpor Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000162828022004445 Filed on March 01, 2022

Income Statement

Concept	2021 Q4	2021 Q2	2020 Q4
Revenue	$772.6M	$5.724M	$244.7M
YoY Change	215.69%	-96.93%	-27.27%
Cost Of Revenue	$27.54M	$41.38M	$23.37M
YoY Change	17.84%	-63.66%	-3.91%
Gross Profit	$745.0M	-$35.65M	$221.4M
YoY Change	236.57%	-149.22%	-13.85%
Gross Profit Margin	96.44%	-622.85%	90.45%
Selling, General & Admin	$97.46M	$109.5M	$134.3M
YoY Change	-27.44%	-11.4%	68.97%
% of Gross Profit	13.08%		60.68%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$65.98M	$32.36M	$45.38M
YoY Change	45.41%	-50.05%	-68.37%
% of Gross Profit	8.86%		20.5%
Operating Expenses	$163.9M	$164.2M	$180.5M
YoY Change	-9.17%	-13.22%	-19.32%
Operating Profit	$581.1M	-$201.7M	$19.63M
YoY Change	2859.95%	-63.7%	-101.36%
Interest Expense	-$15.61M	$8.894M	-$20.34M
YoY Change	-23.26%	-72.52%	-75.87%
% of Operating Profit	-2.69%		-103.6%
Other Income/Expense, Net	-$5.072M	-$7.843M	-$12.50M
YoY Change	-59.42%	47.48%	-39159.38%
Pretax Income	$557.4M	-$209.6M	-$165.6M
YoY Change	-436.65%	-62.65%	-88.95%
Income Tax	-$689.0K	$0.00	$0.00
% Of Pretax Income	-0.12%
Net Earnings	$558.1M	-$209.6M	-$165.6M
YoY Change	-437.07%	-62.65%	-90.88%
Net Earnings / Revenue	72.24%	-3661.53%	-67.65%
Basic Earnings Per Share		-$10.36	-$1.03
Diluted Earnings Per Share	$27.01M	-$10.36	-$1.03
COMMON SHARES
Basic Shares Outstanding	20.59M shares	20.32M shares	160.8M shares
Diluted Shares Outstanding		160.9M shares

Balance Sheet

Concept	2021 Q4	2021 Q2	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$3.260M	$9.389M	$89.86M
YoY Change	-96.37%	233.3%	1382.85%
Cash & Equivalents	$3.260M	$1.526M	$89.86M
Short-Term Investments
Other Short-Term Assets	$17.05M	$56.10M	$187.8M
YoY Change	-90.92%	-12.42%	43.77%
Inventory
Prepaid Expenses
Receivables	$232.9M	$180.7M	$119.9M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$273.6M	$284.3M	$409.8M
YoY Change	-33.24%	87.17%	33.96%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.856B	$1.934B	$2.086B
YoY Change	-11.05%	-18.39%	-39.77%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$0.00	$0.00	$24.82M
YoY Change	-100.0%	-100.0%	-22.56%
Other Assets	$19.87M	$25.97M	$18.37M
YoY Change	8.14%	-29.82%	18.22%
Total Long-Term Assets	$1.895B	$1.969B	$2.130B
YoY Change	-11.05%	-18.93%	-40.45%
TOTAL ASSETS
Total Short-Term Assets	$273.6M	$284.3M	$409.8M
Total Long-Term Assets	$1.895B	$1.969B	$2.130B
Total Assets	$2.168B	$2.253B	$2.540B
YoY Change	-14.63%	-12.68%	-34.59%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$394.0M	$397.8M	$244.9M
YoY Change	60.89%	26.06%	-41.02%
Accrued Expenses	$182.0K	$39.00K	$0.00
YoY Change		-98.84%	-100.0%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$0.00	$60.00M	$253.7M
YoY Change	-100.0%	9144.99%	40112.84%
Total Short-Term Liabilities	$634.9M	$665.7M	$510.3M
YoY Change	24.43%	102.89%	13.1%
LONG-TERM LIABILITIES
Long-Term Debt	$712.9M	$792.8M	$0.00
YoY Change		-58.5%	-100.0%
Other Long-Term Liabilities	$213.0M	$132.8M	$2.330B
YoY Change	-90.86%	23.82%	1614.78%
Total Long-Term Liabilities	$925.9M	$892.6M	$36.60M
YoY Change	2429.59%	-53.28%	-98.27%
TOTAL LIABILITIES
Total Short-Term Liabilities	$634.9M	$665.7M	$510.3M
Total Long-Term Liabilities	$925.9M	$892.6M	$36.60M
Total Liabilities	$1.561B	$1.558B	$2.840B
YoY Change	-45.05%	-33.66%	10.6%
SHAREHOLDERS EQUITY
Retained Earnings	-$112.8M	$0.00	-$4.473B
YoY Change	-97.48%	-100.0%	57.07%
Common Stock	$2.000K	$2.000K	$1.607M
YoY Change	-99.88%	-99.88%	0.63%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$0.00	$54.11M
YoY Change
Treasury Stock Shares	0.000 shares	937.0K shares
Shareholders Equity	$549.5M	$453.1M	-$300.5M
YoY Change
Total Liabilities & Shareholders Equity	$2.168B	$2.253B	$2.540B
YoY Change	-14.63%	-12.68%	-34.59%

Cashflow Statement

Concept	2021 Q4	2021 Q2	2020 Q4
OPERATING ACTIVITIES
Net Income	$558.1M	-$209.6M	-$165.6M
YoY Change	-437.07%	-62.65%	-90.88%
Depreciation, Depletion And Amortization	$65.98M	$32.36M	$45.38M
YoY Change	45.41%	-50.05%	-68.37%
Cash From Operating Activities	$128.3M	$38.37M	-$104.7M
YoY Change	-222.59%	-67.04%	-198.18%
INVESTING ACTIVITIES
Capital Expenditures	-$87.81M	-$85.86M	-$28.72M
YoY Change	205.77%	-46.72%	-61.11%
Acquisitions
YoY Change
Other Investing Activities	$3.846M	$77.00K	$4.826M
YoY Change	-20.31%	-91.07%	-87.21%
Cash From Investing Activities	-$83.96M	-$40.28M	-$23.89M
YoY Change	251.43%	-74.87%	-33.86%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$0.00
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-45.61M	-$18.98M	167.4M
YoY Change	-127.25%	-142.11%	-324.47%
NET CHANGE
Cash From Operating Activities	128.3M	$38.37M	-104.7M
Cash From Investing Activities	-83.96M	-$40.28M	-23.89M
Cash From Financing Activities	-45.61M	-$18.98M	167.4M
Net Change In Cash	-1.225M	-$20.89M	38.82M
YoY Change	-103.16%	-1864.61%	-1055.17%
FREE CASH FLOW
Cash From Operating Activities	$128.3M	$38.37M	-$104.7M
Capital Expenditures	-$87.81M	-$85.86M	-$28.72M
Free Cash Flow	$216.2M	$124.2M	-$75.98M
YoY Change	-384.49%	-55.24%	-142.1%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000874499
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	001-19514
CY2021	dei	Entity Registrant Name EntityRegistrantName	Gulfport Energy Corp
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	86-3684669
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	3001 Quail Springs Parkway
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Oklahoma City,
CY2021Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	0	USD
CY2021	dei	Trading Symbol TradingSymbol	GPOR
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	OK
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	73134
CY2021	dei	City Area Code CityAreaCode	405
CY2021	dei	Local Phone Number LocalPhoneNumber	252-4600
CY2021	dei	Security12b Title Security12bTitle	Common Stock, $0.0001 par value per share
CY2021	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021Q2	dei	Entity Public Float EntityPublicFloat	703900000	USD
CY2021	dei	Auditor Firm AuditorFirmId	248
CY2021	dei	Auditor Name AuditorName	GRANT THORNTON LLP
CY2021	dei	Auditor Location AuditorLocation	Oklahoma City, Oklahoma
CY2022Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	21477000	shares
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3260000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	89861000	USD
CY2021Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	232854000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	119879000	USD
CY2021Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	20383000	USD
CY2020Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	12200000	USD
CY2021Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	12359000	USD
CY2020Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	160664000	USD
CY2021Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	4695000	USD
CY2020Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	27146000	USD
CY2021Q4	us-gaap	Assets Current AssetsCurrent	273551000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	409750000	USD
CY2021Q4	gpor	Proved Oil And Gas Property Full Cost Method Gross ProvedOilAndGasPropertyFullCostMethodGross	1917833000	USD
CY2020Q4	gpor	Proved Oil And Gas Property Full Cost Method Gross ProvedOilAndGasPropertyFullCostMethodGross	9359866000	USD
CY2021Q4	gpor	Unproved Oil And Gas Property Full Cost Method Gross UnprovedOilAndGasPropertyFullCostMethodGross	211007000	USD
CY2020Q4	gpor	Unproved Oil And Gas Property Full Cost Method Gross UnprovedOilAndGasPropertyFullCostMethodGross	1457043000	USD
CY2021Q4	gpor	Property Plantand Equipment Other Than Oil And Gas Property Gross PropertyPlantandEquipmentOtherThanOilAndGasPropertyGross	5329000	USD
CY2020Q4	gpor	Property Plantand Equipment Other Than Oil And Gas Property Gross PropertyPlantandEquipmentOtherThanOilAndGasPropertyGross	88538000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	2134169000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	10905447000	USD
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	278341000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	8819178000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1855828000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2086269000	USD
CY2021Q4	us-gaap	Equity Method Investments EquityMethodInvestments	0	USD
CY2020Q4	us-gaap	Equity Method Investments EquityMethodInvestments	24816000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	18372000	USD
CY2021Q4	gpor	Total Other Assets TotalOtherAssets	38853000	USD
CY2021Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	18664000	USD
CY2020Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	322000	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	322000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	342000	USD
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	19867000	USD
CY2020Q4	gpor	Total Other Assets TotalOtherAssets	43852000	USD
CY2021Q4	us-gaap	Assets Assets	2168232000	USD
CY2020Q4	us-gaap	Assets Assets	2539871000	USD
CY2021Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	394011000	USD
CY2020Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	244903000	USD
CY2021Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	240735000	USD
CY2020Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	11641000	USD
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	182000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	0	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	253743000	USD
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	634928000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	510287000	USD
CY2021Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	184580000	USD
CY2020Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	36604000	USD
CY2021Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	28264000	USD
CY2020Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	0	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	140000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	0	USD
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	712946000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	0	USD
CY2021Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	925930000	USD
CY2020Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	36604000	USD
CY2021Q4	us-gaap	Liabilities Subject To Compromise LiabilitiesSubjectToCompromise	0	USD
CY2020Q4	us-gaap	Liabilities Subject To Compromise LiabilitiesSubjectToCompromise	2293480000	USD
CY2021Q4	us-gaap	Liabilities Liabilities	1560858000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	2840371000	USD
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2021Q4	us-gaap	Temporary Equity Par Or Stated Value Per Share TemporaryEquityParOrStatedValuePerShare	0.0001
CY2021Q4	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	110000	shares
CY2021Q4	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	57900	shares
CY2021Q4	us-gaap	Temporary Equity Shares Issued TemporaryEquitySharesIssued	57900	shares
CY2021Q4	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	57896000	USD
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000.0	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	160800000	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	160800000	shares
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	1607000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-43000000	USD
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	42000000.0	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	20600000	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	20600000	shares
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	2000	USD
CY2021Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	692521000	USD
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	4213752000	USD
CY2021Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	938000	shares
CY2021Q4	us-gaap	Treasury Stock Value TreasuryStockValue	30216000	USD
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-112829000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-4472859000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	549478000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	-300500000	USD
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2168232000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2539871000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-556819000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-137239000	USD
CY2020	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	65291000	USD
CY2019	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	208360000	USD
	us-gaap	Revenues Revenues	535765000	USD
	us-gaap	Revenues Revenues	273037000	USD
CY2020	us-gaap	Revenues Revenues	866542000	USD
CY2019	us-gaap	Revenues Revenues	1563126000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	32172000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	19524000	USD
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	54235000	USD
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	73496000	USD
	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	30243000	USD
	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	12349000	USD
CY2020	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	28509000	USD
CY2019	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	40510000	USD
	us-gaap	Cost Of Revenue CostOfRevenue	212013000	USD
	us-gaap	Cost Of Revenue CostOfRevenue	161086000	USD
CY2020	us-gaap	Cost Of Revenue CostOfRevenue	456318000	USD
CY2019	us-gaap	Cost Of Revenue CostOfRevenue	508843000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	160913000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	62764000	USD
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	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	117813000	USD
	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	0	USD
CY2020	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	1357099000	USD
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	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	0	USD
	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	14568000	USD
CY2020	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	0	USD
CY2019	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	0	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	34465000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	19175000	USD
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	59329000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	45542000	USD
	us-gaap	Restructuring Charges RestructuringCharges	2858000	USD
	us-gaap	Restructuring Charges RestructuringCharges	0	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	30847000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	4611000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1214000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1229000	USD
CY2020	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	3066000	USD
CY2019	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	3939000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	591691000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	290695000	USD
CY2020	us-gaap	Costs And Expenses CostsAndExpenses	2229147000	USD
CY2019	us-gaap	Costs And Expenses CostsAndExpenses	3266819000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	-55926000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	-17658000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	-1362605000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	-1703693000	USD
	us-gaap	Interest Expense InterestExpense	40853000	USD
	us-gaap	Interest Expense InterestExpense	4159000	USD
CY2020	us-gaap	Interest Expense InterestExpense	120079000	USD
CY2019	us-gaap	Interest Expense InterestExpense	141786000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-3040000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	49579000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	48630000	USD
	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	0	USD
	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-342000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-11055000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-210148000	USD
	us-gaap	Reorganization Items ReorganizationItems	0	USD
	us-gaap	Reorganization Items ReorganizationItems	-266898000	USD
CY2020	us-gaap	Reorganization Items ReorganizationItems	152359000	USD
CY2019	us-gaap	Reorganization Items ReorganizationItems	0	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-13049000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1713000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-21324000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2924000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-56942000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	260684000	USD
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-255238000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-306228000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-112868000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	243026000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1617843000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-2009921000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-39000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-7968000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7290000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-7563000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-112829000	USD
	us-gaap	Net Income Loss NetIncomeLoss	250994000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-1625133000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-2002358000	USD
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	4573000	USD
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	0	USD
CY2020	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	0	USD
CY2019	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	0	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-117402000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	250994000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-1625133000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-2002358000	USD
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-5.71
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.56
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-10.14
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-12.49
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-5.71
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.56
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-10.14
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-12.49
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	20545000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	160834000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	160231000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	160341000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20545000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	160834000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	160231000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	160341000	shares
	us-gaap	Net Income Loss NetIncomeLoss	-112829000	USD
	us-gaap	Net Income Loss NetIncomeLoss	250994000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-1625133000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-2002358000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	0	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	2570000	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	3833000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	9193000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	0	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2570000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3833000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	9193000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-112829000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	253564000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-1621300000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-1993165000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	3327768000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-2002358000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	9193000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	10677000	USD
CY2019	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	30688000	USD
CY2019	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1314592000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-1625133000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3833000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	6444000	USD
CY2020	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	236000	USD
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	-300500000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	-300500000	USD
	us-gaap	Net Income Loss NetIncomeLoss	250994000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2570000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	6514000	USD
	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	8000	USD
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	1000	USD
	gpor	Accumulated Other Comprehensive Income Loss Extinguishment AccumulatedOtherComprehensiveIncomeLossExtinguishment	40430000	USD
	gpor	Reorganization Value Cancellation Of Equity ReorganizationValueCancellationOfEquity	0	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	693775000	USD
	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	54109000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	639667000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	639667000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-112829000	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	23893000	USD
	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	171000	USD
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	4573000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3149000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	549478000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-112829000	USD
	us-gaap	Net Income Loss NetIncomeLoss	250994000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-1625133000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-2002358000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	160913000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	62764000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	239744000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	550108000	USD
	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	117813000	USD
	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	0	USD
CY2020	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	1357099000	USD
CY2019	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	2039770000	USD
	gpor	Impairment Of Other Properties And Equipment ImpairmentOfOtherPropertiesAndEquipment	0	USD
	gpor	Impairment Of Other Properties And Equipment ImpairmentOfOtherPropertiesAndEquipment	14568000	USD
CY2020	gpor	Impairment Of Other Properties And Equipment ImpairmentOfOtherPropertiesAndEquipment	0	USD
CY2019	gpor	Impairment Of Other Properties And Equipment ImpairmentOfOtherPropertiesAndEquipment	0	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-342000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-11055000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-210289000	USD
	gpor	Equity Method Investment Realized Gain Losson Disposaland Other Assets EquityMethodInvestmentRealizedGainLossonDisposalandOtherAssets	0	USD
	gpor	Equity Method Investment Realized Gain Losson Disposaland Other Assets EquityMethodInvestmentRealizedGainLossonDisposalandOtherAssets	0	USD
CY2020	gpor	Equity Method Investment Realized Gain Losson Disposaland Other Assets EquityMethodInvestmentRealizedGainLossonDisposalandOtherAssets	0	USD
CY2019	gpor	Equity Method Investment Realized Gain Losson Disposaland Other Assets EquityMethodInvestmentRealizedGainLossonDisposalandOtherAssets	220000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	0	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	0	USD
CY2020	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	0	USD
CY2019	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	2457000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-3040000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	49579000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	48630000	USD
	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-556819000	USD
	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-137239000	USD
CY2020	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	65291000	USD
CY2019	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	208360000	USD
	gpor	Cash Settlement On Derivative Instruments CashSettlementOnDerivativeInstruments	-322857000	USD
	gpor	Cash Settlement On Derivative Instruments CashSettlementOnDerivativeInstruments	-3361000	USD
CY2020	gpor	Cash Settlement On Derivative Instruments CashSettlementOnDerivativeInstruments	159394000	USD
CY2019	gpor	Cash Settlement On Derivative Instruments CashSettlementOnDerivativeInstruments	123130000	USD
	gpor	Non Cash Reorganization Items NonCashReorganizationItems	0	USD
	gpor	Non Cash Reorganization Items NonCashReorganizationItems	-446012000	USD
CY2020	gpor	Non Cash Reorganization Items NonCashReorganizationItems	21956000	USD
CY2019	gpor	Non Cash Reorganization Items NonCashReorganizationItems	0	USD
	gpor	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	0	USD
	gpor	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	0	USD
CY2020	gpor	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	7290000	USD
CY2019	gpor	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	-7563000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	3130000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	1727000	USD
CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	31984000	USD
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	15178000	USD
	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	113044000	USD
	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-153894000	USD
CY2020	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-6785000	USD
CY2019	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-50192000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	292985000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	172155000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	95304000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	723993000	USD
	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	207113000	USD
	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	102330000	USD
CY2020	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	367287000	USD
CY2019	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	720057000	USD
	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	4339000	USD
	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	15000	USD
CY2020	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	50971000	USD
CY2019	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	48527000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-2669000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-4484000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-1729000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	3241000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-200105000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-97831000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-314587000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-674771000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	8783000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	7100000	USD
CY2020	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	0	USD
	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	0	USD
CY2020	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	22827000	USD
CY2019	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	138786000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	30000000	USD
	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	0	USD
	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	50000000	USD
CY2020	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	-2988000	USD
CY2019	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	0	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1503000	USD
CY2021	gpor	Accounts Receivable Collection Period AccountsReceivableCollectionPeriod	P30D
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	0	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	0	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-8000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1512000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1673000	USD
CY2021	gpor	Conversion Ratio Gas To Barrels Of Oil ConversionRatioGasToBarrelsOfOil	6	bbl
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-149037000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-104768000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	303084000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-95459000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-56157000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-30444000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	83801000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-46237000	USD
CY2021Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	59417000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	89861000	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
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3260000	USD
CY2021Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	59417000	USD
CY2021Q4	gpor	Unproved Oil And Gas Property Full Cost Method Gross UnprovedOilAndGasPropertyFullCostMethodGross	211000000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	89861000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	6060000	USD
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2021Q2	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	117800000	USD
CY2020Q4	gpor	Unproved Oil And Gas Property Full Cost Method Gross UnprovedOilAndGasPropertyFullCostMethodGross	1500000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-45484000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-41651000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	0	USD
	gpor	Payments For Reorganization Items PaymentsForReorganizationItems	85706000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	0	USD
CY2021	gpor	Accounts Receivable Collection Period AccountsReceivableCollectionPeriod	P30D
CY2021	us-gaap	Use Of Estimates UseOfEstimates	Use of EstimatesThe preparation of financial statements in conformity with GAAP 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, the fair value determination of acquired assets and liabilities 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. Although management believes these estimates are reasonable, actual results could differ from these estimates.
	gpor	Payments For Reorganization Items PaymentsForReorganizationItems	87199000	USD
CY2020	gpor	Payments For Reorganization Items PaymentsForReorganizationItems	24553000	USD
CY2019	gpor	Payments For Reorganization Items PaymentsForReorganizationItems	0	USD
	us-gaap	Interest Paid Net InterestPaidNet	33295000	USD
	us-gaap	Interest Paid Net InterestPaidNet	7272000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	84823000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	142664000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-9381000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	0	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	0	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-1794000	USD
	gpor	Increase Decreasein Accounts Receivable Oiland Natural Gas IncreaseDecreaseinAccountsReceivableOilandNaturalGas	52143000	USD
	gpor	Increase Decreasein Accounts Receivable Oiland Natural Gas IncreaseDecreaseinAccountsReceivableOilandNaturalGas	60832000	USD
CY2020	gpor	Increase Decreasein Accounts Receivable Oiland Natural Gas IncreaseDecreaseinAccountsReceivableOilandNaturalGas	-1331000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-915000	USD
	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	113044000	USD
	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-153894000	USD
CY2019	gpor	Increase Decreasein Accounts Receivable Oiland Natural Gas IncreaseDecreaseinAccountsReceivableOilandNaturalGas	-88990000	USD
	gpor	Increase Decreasein Accounts Receivable Joint Operationsand Other IncreaseDecreaseinAccountsReceivableJointOperationsandOther	5178000	USD
	gpor	Increase Decreasein Accounts Receivable Joint Operationsand Other IncreaseDecreaseinAccountsReceivableJointOperationsandOther	3005000	USD
CY2020	gpor	Increase Decreasein Accounts Receivable Joint Operationsand Other IncreaseDecreaseinAccountsReceivableJointOperationsandOther	-36055000	USD
CY2019	gpor	Increase Decreasein Accounts Receivable Joint Operationsand Other IncreaseDecreaseinAccountsReceivableJointOperationsandOther	25478000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-72912000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	79193000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	126434000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-19821000	USD
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-13559000	USD
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-135471000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	154948000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-5586000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-3630000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-3067000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2087000	USD
CY2020	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-6785000	USD
CY2019	us-gaap	Increase Decrease In Operating Capital IncreaseDecreaseInOperatingCapital	-50192000	USD
	gpor	Capitalized Stock Based Compensation CapitalizedStockBasedCompensation	1101000	USD
	gpor	Capitalized Stock Based Compensation CapitalizedStockBasedCompensation	930000	USD
CY2020	gpor	Capitalized Stock Based Compensation CapitalizedStockBasedCompensation	2860000	USD
CY2019	gpor	Capitalized Stock Based Compensation CapitalizedStockBasedCompensation	5766000	USD
	us-gaap	Asset Retirement Obligation Period Increase Decrease AssetRetirementObligationPeriodIncreaseDecrease	7964000	USD
	us-gaap	Asset Retirement Obligation Period Increase Decrease AssetRetirementObligationPeriodIncreaseDecrease	546000	USD
CY2020	us-gaap	Asset Retirement Obligation Period Increase Decrease AssetRetirementObligationPeriodIncreaseDecrease	2358000	USD
CY2019	us-gaap	Asset Retirement Obligation Period Increase Decrease AssetRetirementObligationPeriodIncreaseDecrease	6883000	USD
	gpor	Asset Retirement Obligation Removed Due To Divestiture AssetRetirementObligationRemovedDueToDivestiture	0	USD
	gpor	Asset Retirement Obligation Removed Due To Divestiture AssetRetirementObligationRemovedDueToDivestiture	0	USD
CY2020	gpor	Asset Retirement Obligation Removed Due To Divestiture AssetRetirementObligationRemovedDueToDivestiture	2213000	USD
CY2019	gpor	Asset Retirement Obligation Removed Due To Divestiture AssetRetirementObligationRemovedDueToDivestiture	30146000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	198000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	0	USD
CY2020	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	907000	USD
CY2021Q2	us-gaap	Reorganization Value ReorganizationValue	2300000000	USD
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	3372000	USD
	gpor	Transfer Of Debt To Dip Credit Facility TransferOfDebtToDIPCreditFacility	0	USD
	gpor	Transfer Of Debt To Dip Credit Facility TransferOfDebtToDIPCreditFacility	0	USD
CY2020	gpor	Transfer Of Debt To Dip Credit Facility TransferOfDebtToDIPCreditFacility	157500000	USD
CY2019	gpor	Transfer Of Debt To Dip Credit Facility TransferOfDebtToDIPCreditFacility	0	USD
	gpor	Noncash Or Part Noncash Acquisition Contingent Consideration NoncashOrPartNoncashAcquisitionContingentConsideration	0	USD
	gpor	Noncash Or Part Noncash Acquisition Contingent Consideration NoncashOrPartNoncashAcquisitionContingentConsideration	0	USD
CY2020	gpor	Noncash Or Part Noncash Acquisition Contingent Consideration NoncashOrPartNoncashAcquisitionContingentConsideration	23090000	USD
CY2019	gpor	Noncash Or Part Noncash Acquisition Contingent Consideration NoncashOrPartNoncashAcquisitionContingentConsideration	-1137000	USD
	us-gaap	Stock Issued1 StockIssued1	23893000	USD
	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2020	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2019	us-gaap	Stock Issued1 StockIssued1	0	USD
	gpor	Foreign Currency Translation Gain Loss On Investment In Equity Method Investment ForeignCurrencyTranslationGainLossOnInvestmentInEquityMethodInvestment	0	USD
	gpor	Foreign Currency Translation Gain Loss On Investment In Equity Method Investment ForeignCurrencyTranslationGainLossOnInvestmentInEquityMethodInvestment	2570000	USD
CY2020	gpor	Foreign Currency Translation Gain Loss On Investment In Equity Method Investment ForeignCurrencyTranslationGainLossOnInvestmentInEquityMethodInvestment	3833000	USD
CY2019	gpor	Foreign Currency Translation Gain Loss On Investment In Equity Method Investment ForeignCurrencyTranslationGainLossOnInvestmentInEquityMethodInvestment	9193000	USD
CY2021Q4	us-gaap	Accounts Payable And Other Accrued Liabilities Current AccountsPayableAndOtherAccruedLiabilitiesCurrent	143938000	USD
CY2020Q4	us-gaap	Accounts Payable And Other Accrued Liabilities Current AccountsPayableAndOtherAccruedLiabilitiesCurrent	120275000	USD
CY2021Q4	gpor	Revenue Payable And Suspense Current RevenuePayableAndSuspenseCurrent	180857000	USD
CY2020Q4	gpor	Revenue Payable And Suspense Current RevenuePayableAndSuspenseCurrent	124628000	USD
CY2021Q4	gpor	Accrued Contract Damages And Treasury Shares Current AccruedContractDamagesAndTreasurySharesCurrent	69216000	USD
CY2020Q4	gpor	Accrued Contract Damages And Treasury Shares Current AccruedContractDamagesAndTreasurySharesCurrent	0	USD
CY2021Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	394011000	USD
CY2020Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	244903000	USD
CY2021Q2	gpor	Reorganization Post Petition Liabilities And Allowed Claims ReorganizationPostPetitionLiabilitiesAndAllowedClaims	3100000000	USD
CY2021Q2	gpor	Enterprise Value EnterpriseValue	1600000000	USD
CY2021Q2	gpor	Enterprise Value EnterpriseValue	1600000000	USD
CY2021Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1526000	USD
CY2021Q2	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	852751000	USD
CY2021Q2	gpor	Stockholders Equity Including Mezzanine Equity StockholdersEquityIncludingMezzanineEquity	748775000	USD
CY2021Q2	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	55000000	USD
CY2021Q2	gpor	Enterprise Value EnterpriseValue	1600000000	USD
CY2021Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1526000	USD
CY2021Q2	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	686489000	USD
CY2021Q2	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	19084000	USD
CY2021Q2	us-gaap	Common Stock Value Outstanding CommonStockValueOutstanding	54109000	USD
CY2021Q2	us-gaap	Reorganization Value ReorganizationValue	2252990000	USD
CY2021Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1526000	USD
CY2021Q2	us-gaap	Restricted Cash Current RestrictedCashCurrent	57891000	USD
CY2021Q2	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	180711000	USD
CY2021Q2	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	15431000	USD
CY2021Q2	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	25295000	USD
CY2021Q2	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	3465000	USD
CY2021Q2	us-gaap	Assets Current AssetsCurrent	284319000	USD
CY2021Q2	gpor	Proved Oil And Gas Property Full Cost Method Gross ProvedOilAndGasPropertyFullCostMethodGross	1697408000	USD
CY2021Q2	gpor	Unproved Oil And Gas Property Full Cost Method Gross UnprovedOilAndGasPropertyFullCostMethodGross	230174000	USD
CY2021Q2	gpor	Property Plantand Equipment Other Than Oil And Gas Property Gross PropertyPlantandEquipmentOtherThanOilAndGasPropertyGross	6893000	USD
CY2021Q2	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1934475000	USD
CY2021Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	0	USD
CY2021Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1934475000	USD
CY2021Q2	us-gaap	Equity Method Investments EquityMethodInvestments	0	USD
CY2021Q2	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	8183000	USD
CY2021Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	47000	USD
CY2021Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	25966000	USD
CY2021Q2	gpor	Total Other Assets TotalOtherAssets	34196000	USD
CY2021Q2	us-gaap	Assets Assets	2252990000	USD
CY2021Q2	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	506799000	USD
CY2021Q2	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	98900000	USD
CY2021Q2	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	38000	USD
CY2021Q2	us-gaap	Long Term Debt Current LongTermDebtCurrent	60000000	USD
CY2021Q2	us-gaap	Liabilities Current LiabilitiesCurrent	665737000	USD
CY2021Q2	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	80742000	USD
CY2021Q2	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	19084000	USD
CY2021Q2	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	9000	USD
CY2021Q2	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	792751000	USD
CY2021Q2	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	892586000	USD
CY2021Q2	us-gaap	Liabilities Liabilities	1558323000	USD
CY2021Q2	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2021Q2	us-gaap	Temporary Equity Carrying Amount Attributable To Parent TemporaryEquityCarryingAmountAttributableToParent	55000000	USD
CY2021Q2	us-gaap	Common Stock Value CommonStockValue	2000	USD
CY2021Q2	us-gaap	Common Stock Value CommonStockValue	2000	USD
CY2021Q2	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	693774000	USD
CY2021Q2	us-gaap	Treasury Stock Value TreasuryStockValue	54109000	USD
CY2021Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	0	USD
CY2021Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	0	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	639667000	USD
CY2021Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2252990000	USD
CY2021Q2	us-gaap	Liabilities Subject To Compromise LiabilitiesSubjectToCompromise	2224449000	USD
	us-gaap	Debtor Reorganization Items Legal And Advisory Professional Fees DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees	0	USD
	us-gaap	Debtor Reorganization Items Legal And Advisory Professional Fees DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees	81565000	USD
	us-gaap	Debtor Reorganization Items Gain Loss On Settlement Of Other Claims Net1 DebtorReorganizationItemsGainLossOnSettlementOfOtherClaimsNet1	0	USD
	us-gaap	Debtor Reorganization Items Gain Loss On Settlement Of Other Claims Net1 DebtorReorganizationItemsGainLossOnSettlementOfOtherClaimsNet1	575182000	USD
	gpor	Debtor Reorganization Items Elimination Predecessor Accumulated Other Comprehensive Income DebtorReorganizationItemsEliminationPredecessorAccumulatedOtherComprehensiveIncome	40430000	USD
	us-gaap	Debtor Reorganization Items Debtor In Possession Facility Financing Costs DebtorReorganizationItemsDebtorInPossessionFacilityFinancingCosts	0	USD
	us-gaap	Debtor Reorganization Items Debtor In Possession Facility Financing Costs DebtorReorganizationItemsDebtorInPossessionFacilityFinancingCosts	3150000	USD
	us-gaap	Debtor Reorganization Items Other Expense Income DebtorReorganizationItemsOtherExpenseIncome	0	USD
	us-gaap	Debtor Reorganization Items Other Expense Income DebtorReorganizationItemsOtherExpenseIncome	22383000	USD
	us-gaap	Reorganization Items ReorganizationItems	0	USD
	us-gaap	Reorganization Items ReorganizationItems	-266898000	USD
CY2021Q4	gpor	Proved Oil And Gas Property Full Cost Method Gross ProvedOilAndGasPropertyFullCostMethodGross	1917833000	USD
CY2020Q4	gpor	Proved Oil And Gas Property Full Cost Method Gross ProvedOilAndGasPropertyFullCostMethodGross	9359866000	USD
CY2021Q4	gpor	Unproved Oil And Gas Property Full Cost Method Gross UnprovedOilAndGasPropertyFullCostMethodGross	211007000	USD
CY2020Q4	gpor	Unproved Oil And Gas Property Full Cost Method Gross UnprovedOilAndGasPropertyFullCostMethodGross	1457043000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	4943000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	85530000	USD
CY2021Q4	us-gaap	Land Land	386000	USD
CY2020Q4	us-gaap	Land Land	3008000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	2134169000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	10905447000	USD
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	278341000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	8819178000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1855828000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2086269000	USD
	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	117800000	USD
CY2020	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	1400000000	USD
CY2019	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	2000000000	USD
	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	8000000	USD
	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	11900000	USD
CY2020	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	25000000	USD
CY2019	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	30100000	USD
	gpor	Depletionper Mc Fof Gas Equivalent DepletionperMCFofGasEquivalent	0.69	usd_per_mcf
	gpor	Depletionper Mc Fof Gas Equivalent DepletionperMCFofGasEquivalent	0.45	usd_per_mcf
CY2020	gpor	Depletionper Mc Fof Gas Equivalent DepletionperMCFofGasEquivalent	0.61	usd_per_mcf
CY2019	gpor	Depletionper Mc Fof Gas Equivalent DepletionperMCFofGasEquivalent	1.08	usd_per_mcf
	us-gaap	Acquisition Costs AcquisitionCosts	8687000	USD
	us-gaap	Acquisition Costs AcquisitionCosts	202296000	USD
CY2021Q4	us-gaap	Acquisition Costs Cumulative AcquisitionCostsCumulative	210983000	USD
	us-gaap	Exploration Costs ExplorationCosts	0	USD
	us-gaap	Exploration Costs ExplorationCosts	0	USD
CY2021Q4	us-gaap	Exploration Costs Cumulative ExplorationCostsCumulative	0	USD
	us-gaap	Development Costs DevelopmentCosts	18000	USD
	us-gaap	Development Costs DevelopmentCosts	0	USD
CY2021Q4	us-gaap	Development Costs Cumulative DevelopmentCostsCumulative	18000	USD
	gpor	Interest Cost Capitalized Not Subjectto Amortization InterestCostCapitalizedNotSubjecttoAmortization	6000	USD
	gpor	Interest Cost Capitalized Not Subjectto Amortization InterestCostCapitalizedNotSubjecttoAmortization	0	USD
CY2021Q4	us-gaap	Accumulated Capitalized Interest Costs AccumulatedCapitalizedInterestCosts	6000	USD
	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization	8711000	USD
	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization	202296000	USD
CY2021Q4	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	211007000	USD
CY2021Q4	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	211007000	USD
CY2020Q4	gpor	Unproved Oil And Gas Property Full Cost Method Gross UnprovedOilAndGasPropertyFullCostMethodGross	1500000000	USD
CY2020	gpor	Non Producing Leases Extension Term NonProducingLeasesExtensionTerm	P5Y
CY2020	gpor	Non Producing Leases Extension Term NonProducingLeasesExtensionTerm	P5Y
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	60355000	USD
CY2020	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	2358000	USD
CY2020	gpor	Asset Retirement Obligation Removed Due To Divestiture AssetRetirementObligationRemovedDueToDivestiture	2213000	USD
CY2020	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	3066000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	63566000	USD
CY2020Q4	gpor	Liabilities Subject To Compromise Asset Retirement Obligation LiabilitiesSubjectToCompromiseAssetRetirementObligation	63566000	USD
CY2020Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	0	USD
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	63566000	USD
	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	546000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1229000	USD
CY2021Q2	us-gaap	Asset Retirement Obligation AssetRetirementObligation	65341000	USD
CY2021Q2	gpor	Asset Retirement Obligation Less Adjustments AssetRetirementObligationLessAdjustments	19084000	USD
	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	204000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1214000	USD
	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	7762000	USD
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	28264000	USD
CY2021Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	1054000	USD
CY2020Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	0	USD
CY2021Q4	us-gaap	Long Term Debt LongTermDebt	712946000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	2258962000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	253743000	USD
CY2021Q4	gpor	Liabilities Subject To Compromise Debt LiabilitiesSubjectToCompromiseDebt	0	USD
CY2020Q4	gpor	Liabilities Subject To Compromise Debt LiabilitiesSubjectToCompromiseDebt	2005219000	USD
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	712946000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	0	USD
CY2021Q4	us-gaap	Debtor In Possession Financing Letters Of Credit Outstanding DebtorInPossessionFinancingLettersOfCreditOutstanding	262500000	USD
CY2021Q4	us-gaap	Debtor In Possession Financing Amount Arranged DebtorInPossessionFinancingAmountArranged	105000000	USD
CY2021Q4	us-gaap	Debtor In Possession Financing Borrowings Outstanding DebtorInPossessionFinancingBorrowingsOutstanding	157500000	USD
	us-gaap	Interest Paid Net InterestPaidNet	33295000	USD
	us-gaap	Interest Paid Net InterestPaidNet	7272000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	84823000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	142664000	USD
	gpor	Debt Instrument Increase Decrease Accrued Interest DebtInstrumentIncreaseDecreaseAccruedInterest	6061000	USD
	gpor	Debt Instrument Increase Decrease Accrued Interest DebtInstrumentIncreaseDecreaseAccruedInterest	-1503000	USD
CY2020	gpor	Debt Instrument Increase Decrease Accrued Interest DebtInstrumentIncreaseDecreaseAccruedInterest	30600000	USD
CY2019	gpor	Debt Instrument Increase Decrease Accrued Interest DebtInstrumentIncreaseDecreaseAccruedInterest	-3834000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	198000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	0	USD
CY2020	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	907000	USD
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	3372000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1663000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	0	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	5563000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	6328000	USD
	us-gaap	Interest Expense Other InterestExpenseOther	32000	USD
	us-gaap	Interest Expense Other InterestExpenseOther	-1610000	USD
CY2020	us-gaap	Interest Expense Other InterestExpenseOther	0	USD
CY2019	us-gaap	Interest Expense Other InterestExpenseOther	0	USD
	us-gaap	Interest Expense InterestExpense	40853000	USD
	us-gaap	Interest Expense InterestExpense	4159000	USD
CY2020	us-gaap	Interest Expense InterestExpense	120079000	USD
CY2019	us-gaap	Interest Expense InterestExpense	141786000	USD
CY2021Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	42000000	shares
CY2021Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2021Q2	us-gaap	Temporary Equity Shares Authorized TemporaryEquitySharesAuthorized	110000	shares
CY2021Q2	us-gaap	Temporary Equity Par Or Stated Value Per Share TemporaryEquityParOrStatedValuePerShare	0.0001
CY2021Q2	us-gaap	Temporary Equity Liquidation Preference Per Share TemporaryEquityLiquidationPreferencePerShare	1000
CY2021Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	19800000	shares
CY2021Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	55000	shares
	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.10
	gpor	Preferred Stock Dividend Rate Percentage Paid In Kind PreferredStockDividendRatePercentagePaidInKind	0.15
CY2021Q2	gpor	Dividends Paid In Kind Ratio DividendsPaidInKindRatio	1.50
CY2021Q2	gpor	Dividends Paid In Kind Ratio DividendsPaidInKindRatio	1.50
CY2021Q2	us-gaap	Preferred Stock Convertible Conversion Price PreferredStockConvertibleConversionPrice	14.00
CY2021Q2	gpor	Preferred Stock Value Outstanding Payment Period PreferredStockValueOutstandingPaymentPeriod	P3D
	us-gaap	Preferred Stock Dividends Shares PreferredStockDividendsShares	3071	shares
	us-gaap	Dividends Preferred Stock Paidinkind DividendsPreferredStockPaidinkind	55000	USD
	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	1500000	USD
CY2021Q2	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	55000	shares
	gpor	Temporary Equity Stock Issued During Period Shares New Issues TemporaryEquityStockIssuedDuringPeriodSharesNewIssues	3071	shares
	us-gaap	Stock Issued During Period Shares Conversion Of Units StockIssuedDuringPeriodSharesConversionOfUnits	175	shares
CY2021Q4	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	57896	shares
CY2021Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	100000000	USD
CY2021	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	0	shares
CY2021Q2	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4400000	USD
CY2021Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	232900000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	119900000	USD
CY2021	us-gaap	Revenue Performance Obligation Description Of Timing RevenuePerformanceObligationDescriptionOfTiming	However, settlement statements for certain sales may be received 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.
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	187000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	142000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	329000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	7000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	322000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	48000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	41000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	9658000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	3000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	0	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	586000	USD
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	11507000	USD
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	4496000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	9361000	USD
	us-gaap	Lease Cost LeaseCost	11558000	USD
	us-gaap	Lease Cost LeaseCost	4537000	USD
CY2020	us-gaap	Lease Cost LeaseCost	19605000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	78000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	48000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	140000	USD
	us-gaap	Operating Lease Payments Use OperatingLeasePaymentsUse	0	USD
	us-gaap	Operating Lease Payments Use OperatingLeasePaymentsUse	0	USD
CY2020	us-gaap	Operating Lease Payments Use OperatingLeasePaymentsUse	10272000	USD
	gpor	Operating Lease Payments Use Related Party OperatingLeasePaymentsUseRelatedParty	0	USD
	gpor	Operating Lease Payments Use Related Party OperatingLeasePaymentsUseRelatedParty	0	USD
CY2020	gpor	Operating Lease Payments Use Related Party OperatingLeasePaymentsUseRelatedParty	6800000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P1Y9M10D
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0242
	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-39000	USD
	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-7968000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0	USD
	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-273000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-7000	USD
	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	7563000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-7556000	USD
	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-39000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-7968000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7290000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-7563000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-112868000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	243026000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1617843000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-2009921000	USD
	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-23702000	USD
	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	51036000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-339747000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-422083000	USD
	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-3177000	USD
	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-12484000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-14696000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-28316000	USD
	gpor	Effective Income Tax Rate Reconciliation Bankruptcy Adjustments EffectiveIncomeTaxRateReconciliationBankruptcyAdjustments	44748000	USD
	gpor	Effective Income Tax Rate Reconciliation Bankruptcy Adjustments EffectiveIncomeTaxRateReconciliationBankruptcyAdjustments	-111285000	USD
	gpor	Effective Income Tax Rate Reconciliation Remeasurement Of State Deferred Tax Asset EffectiveIncomeTaxRateReconciliationRemeasurementOfStateDeferredTaxAsset	-7966000	USD
	gpor	Effective Income Tax Rate Reconciliation Remeasurement Of State Deferred Tax Asset EffectiveIncomeTaxRateReconciliationRemeasurementOfStateDeferredTaxAsset	0	USD
	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	2841000	USD
	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	445000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	10800000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	3372000	USD
	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-12783000	USD
	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	64320000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	350933000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	439464000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-39000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-7968000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7290000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-7563000	USD
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.033
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-8000000	USD
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.0003
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-39000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	298127000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	415719000	USD
CY2021Q4	gpor	Deferred Tax Asset Oiland Gas Property Basis Difference DeferredTaxAssetOilandGasPropertyBasisDifference	432959000	USD
CY2020Q4	gpor	Deferred Tax Asset Oiland Gas Property Basis Difference DeferredTaxAssetOilandGasPropertyBasisDifference	463705000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Investment In Subsidiaries DeferredTaxAssetsInvestmentInSubsidiaries	58751000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Investment In Subsidiaries DeferredTaxAssetsInvestmentInSubsidiaries	61078000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Hedging Transactions DeferredTaxAssetsHedgingTransactions	86296000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Hedging Transactions DeferredTaxAssetsHedgingTransactions	7656000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	31298000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	41292000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	907431000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	989450000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	907358000	USD
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	3900000	shares
	us-gaap	Net Income Loss NetIncomeLoss	-112829000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	985528000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	73000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	3922000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	73000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	3922000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	73000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	3922000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	907400000	USD
CY2021Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	661000000	USD
CY2021Q4	gpor	Operating Loss Carryforwards Not Subject To Expiration OperatingLossCarryforwardsNotSubjectToExpiration	1100000000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3800000	USD
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
	us-gaap	Net Income Loss NetIncomeLoss	250994000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-1625133000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-2002358000	USD
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	4573000	USD
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	0	USD
CY2020	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	0	USD
CY2019	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	0	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	0	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	0	USD
CY2020	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	0	USD
CY2019	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	0	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-117402000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-117402000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	250994000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	250994000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-1625133000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-1625133000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-2002358000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-2002358000	USD
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	20545000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	160834000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	160231000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	160341000	shares
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-5.71
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-5.71
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.56
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.56
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-10.14
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-10.14
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-12.49
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-12.49
CY2021Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	23359000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-556819000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-137239000	USD
CY2020	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	65291000	USD
CY2019	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	208360000	USD
CY2021Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	20265000	USD
CY2021Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	3094000	USD
CY2021Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	425315000	USD
CY2021Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	20265000	USD
CY2021Q4	us-gaap	Derivative Liability Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	405050000	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	27468000	USD
CY2020Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	25730000	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	1738000	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	48245000	USD
CY2020Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	25730000	USD
CY2020Q4	us-gaap	Derivative Liability Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	22515000	USD
CY2020Q3	us-gaap	Restructuring And Related Cost Number Of Positions Eliminated Inception To Date Percent RestructuringAndRelatedCostNumberOfPositionsEliminatedInceptionToDatePercent	0.10
CY2019Q4	us-gaap	Restructuring And Related Cost Number Of Positions Eliminated Inception To Date Percent RestructuringAndRelatedCostNumberOfPositionsEliminatedInceptionToDatePercent	0.13
CY2021Q3	us-gaap	Restructuring And Related Cost Number Of Positions Eliminated Inception To Date Percent RestructuringAndRelatedCostNumberOfPositionsEliminatedInceptionToDatePercent	0.03
	us-gaap	Severance Costs1 SeveranceCosts1	2858000	USD
	us-gaap	Severance Costs1 SeveranceCosts1	0	USD
CY2020	us-gaap	Severance Costs1 SeveranceCosts1	1460000	USD
CY2019	us-gaap	Severance Costs1 SeveranceCosts1	4611000	USD
	us-gaap	Other Restructuring Costs OtherRestructuringCosts	0	USD
	us-gaap	Other Restructuring Costs OtherRestructuringCosts	0	USD
CY2020	us-gaap	Other Restructuring Costs OtherRestructuringCosts	29387000	USD
CY2019	us-gaap	Other Restructuring Costs OtherRestructuringCosts	0	USD
	us-gaap	Restructuring Costs RestructuringCosts	2858000	USD
	us-gaap	Restructuring Costs RestructuringCosts	0	USD
CY2020	us-gaap	Restructuring Costs RestructuringCosts	30847000	USD
CY2019	us-gaap	Restructuring Costs RestructuringCosts	4611000	USD
CY2020Q4	us-gaap	Equity Method Investments EquityMethodInvestments	24816000	USD
	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-342000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-11055000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-210148000	USD
CY2021Q4	gpor	Contingent Consideration Asset Fair Value ContingentConsiderationAssetFairValue	5800000	USD
	gpor	Contingent Consideration Change In Amount Asset ContingentConsiderationChangeInAmountAsset	400000	USD
	gpor	Contingent Consideration Asset Settlements ContingentConsiderationAssetSettlements	600000	USD
	gpor	Contingent Consideration Asset Settlements ContingentConsiderationAssetSettlements	200000	USD
	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	200000	USD
	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	500000	USD
CY2021Q4	gpor	Supply Commitment Duein Next Twelve Months SupplyCommitmentDueinNextTwelveMonths	4000	MMBTU
CY2021	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	1
CY2021	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.50
	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	700000	USD
	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	700000	USD
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2600000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2900000	USD
CY2021	us-gaap	Loss Contingency Disclosures LossContingencyDisclosures	CONTINGENCIES<div style="margin-bottom:12pt;margin-top:12pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company is involved in litigation and regulatory proceedings including those described below. Many of these proceedings are in early stages, and many of them seek or may seek damages and penalties, the amount of which is indeterminate. The Company's total accrued liabilities in respect of litigation and regulatory proceedings is determined on a case-by-case basis and represents an estimate of probable losses after considering, among other factors, the progress of each case or proceeding, its experience and the experience of others in similar cases or proceedings, and the opinions and views of legal counsel. Significant judgment is required in making these estimates and their final liabilities may ultimately be materially different. In accordance with ASC Topic 450, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Contingencies</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, an accrual is recorded for a material loss contingency when its occurrence is probable and damages are reasonably estimable based on the anticipated most likely outcome or the minimum amount within a range of possible outcomes.</span></div><div style="margin-bottom:12pt;margin-top:12pt"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Litigation and Regulatory Proceedings</span></div><div style="margin-bottom:12pt;margin-top:12pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Commencement of the Chapter 11 Cases automatically stayed the proceedings and actions against us that are described below, in addition to actions seeking to collect pre-petition indebtedness or to exercise control over the property of the Company's bankruptcy estates.</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:120%"> </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Plan in the Chapter 11 Cases, which became effective on May 17, 2021, provided for the treatment of claims against the Company's bankruptcy estates, including pre-petition liabilities that had not been satisfied or addressed during the Chapter 11 Cases.</span></div><div style="margin-bottom:12pt;margin-top:12pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As part of its Chapter 11 Cases and restructuring efforts as discussed in </span><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="#ifd300d69835d4f718b5ab7c33ba7684f_91" style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Note 2</a></span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, the Company filed motions to reject certain firm transportation agreements between the Company and affiliates of TC Energy Corporation ("TC") and Rover Pipeline LLC ("Rover") or jointly as the “Pending Motions to Reject”. The Pending Motions to Reject were removed to the United States District Court for the Southern District of Texas. While the Pending Motions to Reject are litigated, the Company isn’t required to perform under these firm transportation agreements. During the third quarter of 2021, Gulfport finalized a settlement agreement with TC that was approved by the Bankruptcy Court on September 21, 2021. Pursuant to the settlement agreement, Gulfport and TC agreed that the firm transportation contracts between Gulfport and TC would be rejected without any further payment or obligation by Gulfport or TC, and TC assigned its damages claims from such rejection to Gulfport. In exchange, Gulfport agreed to make a payment of $43.8 million in cash to TC. The $43.8 million was paid to TC on October 7, 2021. Gulfport expects to receive distributions for a significant portion of such amounts through future distributions with respect to the assigned claims pursuant to Gulfport’s Chapter 11 plan of reorganization that became effective in May 2021. Any future distributions will be recognized once received by Gulfport. In February 2022, Gulfport received an initial distribution of $11.5 million from the above mentioned claim. The timing and amount of any future distributions are not certain, and the total amount received will be impacted by the bankruptcy trustee's liquidation of Mammoth Energy shares and other bankruptcy claims. The Company believes that the Pending Motion to Reject with respect to Rover will be ultimately granted, and that the Company does not have any ongoing obligation pursuant to the contract; however, in the event that the Company is not permitted to reject the Rover firm transportation contract, it could be liable for demand charges, attorneys' fees and interest in excess of approximately $55 million.</span></div><div style="margin-bottom:12pt;margin-top:12pt;text-indent:18pt"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company, along with a number of other oil and gas companies, has been named as a defendant in two separate complaints, one filed by the State of Louisiana and the Parish of Cameron in the 38th Judicial District Court for the Parish of Cameron on February 9, 2016 and the other filed by the State of Louisiana and the District Attorney for the 15</span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:6.5pt;font-weight:400;line-height:120%;position:relative;top:-3.5pt;vertical-align:baseline">th</span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> Judicial District of the State of Louisiana in the 15</span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:6.5pt;font-weight:400;line-height:120%;position:relative;top:-3.5pt;vertical-align:baseline">th</span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> Judicial District Court for the Parish of Vermilion on July 29, 2016 (together, the "Complaints"). The Complaints allege that certain of the defendants’ operations violated the State and Local Coastal Resources Management Act of 1978, as amended, and the rules, regulations, orders and ordinances adopted thereunder (the "CZM Laws") by causing substantial damage to land and </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">waterbodies located in the coastal zone of the relevant Parish. The plaintiffs seek damages and other relief under the CZM Laws, including the payment of costs necessary to clear, re-vegetate, detoxify and otherwise restore the affected coastal zone of the relevant Parish to its original condition, actual restoration of such coastal zone to its original condition, and the payment of reasonable attorney fees and legal expenses and interest. The case is stayed pending a ruling on plaintiff's motion to remand the lawsuit to state court. On September 9, 2021, the State of Louisiana and Cameron Parish dismissed all claims against Gulfport without prejudice. </span></div><div style="margin-bottom:12pt;margin-top:12pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In March 2020, Robert F. Woodley, individually and on behalf of all others similarly situated, filed a federal securities class action against the Company, David M. Wood, Keri Crowell and Quentin R. Hicks in the United States District Court for the Southern District of New York. The complaint alleges that the Company made materially false and misleading statements regarding the Company’s business and operations in violation of the federal securities laws and seeks unspecified damages, the payment of reasonable attorneys’ fees, expert fees and other costs, pre-judgment and post-judgment interest, and such other and further relief that may be deemed just and proper. On January 11, 2022, the court granted Gulfport's motion to dismiss and the case was closed by the court on February 14, 2022. The plaintiff's deadline to appeal the dismissal is March 16, 2022.</span></div><div style="margin-bottom:12pt;margin-top:12pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In September 2019, a stockholder of Mammoth Energy filed a derivative action on behalf of Mammoth Energy against members of Mammoth Energy’s Board of Directors, including a director designated by the Company, and its significant stockholders, including the Company, in the United States District Court for the Western District of Oklahoma. The complaint alleges, among other things, that the members of Mammoth Energy’s Board of Directors breached their fiduciary duties and violated the Securities Exchange Act of 1934, as amended, in connection with Mammoth Energy’s activities in Puerto Rico following Hurricane Maria. The complaint seeks unspecified damages, the payment of reasonable attorney fees and legal expenses and interest and to force Mammoth Energy and its Board of Directors to make specified corporate governance reforms. On January 25, 2022, the court signed a final order and judgment dismissing all claims against Gulfport. </span></div><div style="margin-bottom:12pt;margin-top:12pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In December 2019, the Company filed a lawsuit against Stingray Pressure Pumping LLC, a subsidiary of Mammoth Energy (“Stingray”), for breach of contract and to terminate the Master Services Agreement for pressure pumping services, effective as of October 1, 2014, as amended (the “Master Services Agreement”), between Stingray and the Company. In March 2020, Stingray filed a counterclaim against the Company in the Superior Court of the State of Delaware. The counterclaim alleges that the Company has breached the Master Services Agreement. The counterclaim seeks actual damages, and Stingray filed claims in the Chapter 11 proceedings exceeding $80 million related to breach of contract damages, attorneys' fees and interest. In September 2021, Gulfport reached an agreement in principle with Stingray that fully resolves the litigation between the parties. Pursuant to the settlement, Stingray and Gulfport have agreed to drop all of the claims brought against each other in Delaware Court and Bankruptcy Court. On September 22, 2021, the parties announced to the bankruptcy court that all Stingray claims </span></div><div style="margin-bottom:12pt;margin-top:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">would be withdrawn. On December 15, 2021, the parties filed a Joint Stipulation and Agreed Order with the bankruptcy court resolving all claims. </span></div><div style="margin-bottom:12pt;margin-top:12pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In August 2020, Muskie filed an action against the Company in the Superior Court of the State of Delaware for breach of contract. The complaint alleges that the Company breached its obligation to purchase a certain amount of proppant sand each month or make designated shortfall payments under the Sand Supply Agreement, effective October 1, 2014, as amended (the “Sand Supply Agreement”), between Muskie and the Company, and seeks payment of unpaid shortfall payments, and Muskie filed a claim in the Chapter 11 proceedings for $3.4 million. On September 22, 2021, the parties announced to the bankruptcy court that an agreed claim for $3.1 million would resolve the matter. On December 15, 2021, the parties filed a Joint Stipulation and Agreed Order with the bankruptcy court resolving all claims. </span></div><div style="margin-bottom:12pt;margin-top:12pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In April 2020, Bryon Lefort, individually and on behalf of similarly situated individuals, filed an action against the Company in the United States District Court for the Southern District of Ohio Eastern Division. The complaint alleges that the Company violated the Fair Labor Standards Act (“FLSA”), the Ohio Wage Act and the Ohio Prompt Pay Act by classifying the plaintiffs as independent contractors and paying them a daily rate with no overtime compensation for hours worked in excess of 40 hours per week. The complaint seeks to recover unpaid regular and overtime wages, liquidated damages in an amount equal to six percent of all unpaid overtime compensation, the payment of reasonable attorney fees and legal expenses and pre-judgment and post-judgment interest, and such other damages that may be owed to the workers, and claims were filed in the Chapter 11 proceedings totaling $5.8 million. On October 1, 2021, the bankruptcy court approved the parties' settlement resolving all claims for a bankruptcy claim of approximately $0.7 million. The United States District Court for the Southern District of Ohio Eastern Division terminated the civil case on November 3, 2021. </span></div><div style="margin-bottom:12pt;margin-top:12pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company, along with other oil and gas companies, have been named as a defendant in J&R Passmore, LLC, individually and on behalf of all others similarly situated, in the United States District Court for the Southern District of Ohio on December 6, 2018. Plaintiffs assert their respective leases are limited to the Marcellus and Utica shale geological formations and allege that Defendants have willfully trespassed and illegally produced oil, natural gas, and other hydrocarbon products beyond these respective formations. Plaintiffs seek the full value of any production from below the Marcellus and Utica shale formations, unspecified damages from the diminution of value to their mineral estate, unspecified punitive damages, and the payment of reasonable attorney fees, legal expenses, and interest. On April 27, 2021, the Bankruptcy Court for the Southern District of Texas approved a settlement agreement in which the plaintiffs fully released the Company from all claims for amounts allegedly owed to the plaintiffs through the effective date of the Company’s chapter 11 plan, which occurred on May 17, 2021. The plaintiffs are continuing to pursue alleged damages after May 17, 2021.</span></div><div style="margin-bottom:12pt;margin-top:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Business Operations</span></div><div style="margin-bottom:12pt;margin-top:12pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company is involved in various lawsuits and disputes incidental to its business operations, including commercial disputes, personal injury claims, royalty claims, property damage claims and contract actions. </span></div><div style="margin-bottom:12pt;margin-top:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Environmental Contingencies</span></div><div style="margin-bottom:12pt;margin-top:12pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The nature of the oil and gas business carries with it certain environmental risks for Gulfport and its subsidiaries. Gulfport and its subsidiaries have implemented various policies, programs, procedures, training and audits to reduce and mitigate environmental risks. The Company conducts periodic reviews, on a company-wide basis, to assess changes in their environmental risk profile. Environmental reserves are established for environmental liabilities for which economic losses are probable and reasonably estimable. The Company manages its exposure to environmental liabilities in acquisitions by using an evaluation process that seeks to identify pre-existing contamination or compliance concerns and address the potential liability. Depending on the extent of an identified environmental concern, they may, among other things, exclude a property from the transaction, require the seller to remediate the property to their satisfaction in an acquisition or agree to assume liability for the remediation of the property.</span></div><div style="margin-bottom:12pt;margin-top:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Other Matters</span></div><div style="margin-bottom:12pt;margin-top:12pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Based on management’s current assessment, they are of the opinion that no pending or threatened lawsuit or dispute relating to its business operations is likely to have a material adverse effect on their future consolidated financial position, results of operations or cash flows. The final resolution of such matters could exceed amounts accrued, however, and actual results could differ materially from management’s estimates.</span></div><div style="margin-bottom:12pt;margin-top:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Concentration of Credit Risk</span></div><div style="margin-bottom:12pt;margin-top:12pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Gulfport operates in the oil and natural gas industry principally in the states of Ohio and Oklahoma with sales to refineries, re-sellers such as marketers, and other end users. 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.</span></div><div style="margin-bottom:12pt;margin-top:12pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company maintains cash balances at several banks. Accounts at each institution are insured by the Federal Deposit Insurance Corporation. At December 31, 2021, Gulfport held no cash in excess of insured limits in these banks.</span></div>During the Predecessor Period, three customers accounted for approximately 37% of the Company's total sales. During the Successor Period, two customers accounted for approximately 30% of the Company's total sales. During the year ended December 31, 2020, one customer accounted for approximately 12% of the Company's total sales. During the year ended December 31, 2019, one customer accounted for approximately 14% of the Company's total sales. The Company does not believe that the loss of any of these customers would have a material adverse effect on its natural gas, oil and condensate and NGL sales as alternative customers are readily available.
CY2021	us-gaap	Loss Contingency New Claims Filed Number LossContingencyNewClaimsFiledNumber	2	claim
CY2021Q4	gpor	Proved Oil And Gas Property Full Cost Method Gross ProvedOilAndGasPropertyFullCostMethodGross	1917833000	USD
CY2020Q4	us-gaap	Capitalized Costs Proved Properties CapitalizedCostsProvedProperties	9359866000	USD
CY2021Q4	gpor	Unproved Oil And Gas Property Full Cost Method Gross UnprovedOilAndGasPropertyFullCostMethodGross	211007000	USD
CY2020Q4	us-gaap	Capitalized Costs Unproved Properties CapitalizedCostsUnprovedProperties	1457043000	USD
CY2021Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Gross CapitalizedCostsOilAndGasProducingActivitiesGross	2128840000	USD
CY2020Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Gross CapitalizedCostsOilAndGasProducingActivitiesGross	10816909000	USD
CY2021Q4	us-gaap	Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities	277331000	USD
CY2020Q4	us-gaap	Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities	8778759000	USD
CY2021Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Net CapitalizedCostsOilAndGasProducingActivitiesNet	1851509000	USD
CY2020Q4	us-gaap	Capitalized Costs Oil And Gas Producing Activities Net CapitalizedCostsOilAndGasProducingActivitiesNet	2038150000	USD
	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	13411000	USD
	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	3922000	USD
CY2020	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	15260000	USD
CY2019	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	37598000	USD
	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	191193000	USD
	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	112986000	USD
CY2020	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	276622000	USD
CY2019	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	594673000	USD
	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	0	USD
	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	0	USD
CY2020	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	0	USD
CY2019	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	9762000	USD
	gpor	Total Costs Incurred In Oil And Gas Properties Acquisition And Development Activities TotalCostsIncurredInOilAndGasPropertiesAcquisitionAndDevelopmentActivities	204604000	USD
	gpor	Total Costs Incurred In Oil And Gas Properties Acquisition And Development Activities TotalCostsIncurredInOilAndGasPropertiesAcquisitionAndDevelopmentActivities	116908000	USD
CY2020	gpor	Total Costs Incurred In Oil And Gas Properties Acquisition And Development Activities TotalCostsIncurredInOilAndGasPropertiesAcquisitionAndDevelopmentActivities	291882000	USD
CY2019	gpor	Total Costs Incurred In Oil And Gas Properties Acquisition And Development Activities TotalCostsIncurredInOilAndGasPropertiesAcquisitionAndDevelopmentActivities	642033000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	0	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	200000	USD
CY2020	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	900000	USD
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	3400000	USD
	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	8000000	USD
	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	11900000	USD
CY2020	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	25000000	USD
CY2019	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	30100000	USD
	us-gaap	Results Of Operations Revenue From Oil And Gas Producing Activities ResultsOfOperationsRevenueFromOilAndGasProducingActivities	1092584000	USD
	us-gaap	Results Of Operations Revenue From Oil And Gas Producing Activities ResultsOfOperationsRevenueFromOilAndGasProducingActivities	410276000	USD
CY2020	us-gaap	Results Of Operations Revenue From Oil And Gas Producing Activities ResultsOfOperationsRevenueFromOilAndGasProducingActivities	801251000	USD
CY2019	us-gaap	Results Of Operations Revenue From Oil And Gas Producing Activities ResultsOfOperationsRevenueFromOilAndGasProducingActivities	1354766000	USD
	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	274428000	USD
	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	192959000	USD
CY2020	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	537609000	USD
CY2019	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	620412000	USD
	us-gaap	Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions	159518000	USD
	us-gaap	Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions	60831000	USD
CY2020	us-gaap	Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions	229702000	USD
CY2019	us-gaap	Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions	539379000	USD
	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	117813000	USD
	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	0	USD
CY2020	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	1357099000	USD
CY2019	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	2039770000	USD
	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	-39000	USD
	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	-7968000	USD
CY2020	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	7290000	USD
CY2019	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	-7563000	USD
	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	540864000	USD
	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	164454000	USD
CY2020	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	-1330449000	USD
CY2019	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	-1837232000	USD
	gpor	Depletionper Mc Fof Gas Equivalent DepletionperMCFofGasEquivalent	0.69	usd_per_mcf
	gpor	Depletionper Mc Fof Gas Equivalent DepletionperMCFofGasEquivalent	0.45	usd_per_mcf
CY2020	gpor	Depletionper Mc Fof Gas Equivalent DepletionperMCFofGasEquivalent	0.61	usd_per_mcf
CY2019	gpor	Depletionper Mc Fof Gas Equivalent DepletionperMCFofGasEquivalent	1.08	usd_per_mcf
CY2018Q4	srt	Proved Developed And Undeveloped Reserves Net ProvedDevelopedAndUndevelopedReservesNet	4743000000	Bcf
CY2019	srt	Proved Developed And Undeveloped Reserves Purchases Of Minerals In Place ProvedDevelopedAndUndevelopedReservesPurchasesOfMineralsInPlace	0	Bcf
CY2019	srt	Proved Developed And Undeveloped Reserves Extensions Discoveries And Additions ProvedDevelopedAndUndevelopedReservesExtensionsDiscoveriesAndAdditions	1097000000	Bcf
CY2019	srt	Proved Developed And Undeveloped Reserves Sales Of Minerals In Place ProvedDevelopedAndUndevelopedReservesSalesOfMineralsInPlace	77000000	Bcf
CY2019	srt	Proved Developed And Undeveloped Reserves Revisions Of Previous Estimates Increase Decrease ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease	734000000	Bcf
CY2019	srt	Proved Developed And Undeveloped Reserves Production ProvedDevelopedAndUndevelopedReservesProduction	502000000	Bcf
CY2019Q4	srt	Proved Developed And Undeveloped Reserves Net ProvedDevelopedAndUndevelopedReservesNet	4528000000	Bcf
CY2020	srt	Proved Developed And Undeveloped Reserves Purchases Of Minerals In Place ProvedDevelopedAndUndevelopedReservesPurchasesOfMineralsInPlace	0	Bcf
CY2020	srt	Proved Developed And Undeveloped Reserves Extensions Discoveries And Additions ProvedDevelopedAndUndevelopedReservesExtensionsDiscoveriesAndAdditions	240000000	Bcf
CY2020	srt	Proved Developed And Undeveloped Reserves Sales Of Minerals In Place ProvedDevelopedAndUndevelopedReservesSalesOfMineralsInPlace	75000000	Bcf
CY2020	srt	Proved Developed And Undeveloped Reserves Revisions Of Previous Estimates Increase Decrease ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease	1725000000	Bcf
CY2020	srt	Proved Developed And Undeveloped Reserves Production ProvedDevelopedAndUndevelopedReservesProduction	380000000	Bcf
CY2020Q4	srt	Proved Developed And Undeveloped Reserves Net ProvedDevelopedAndUndevelopedReservesNet	2588000000	Bcf
CY2021	srt	Proved Developed And Undeveloped Reserves Purchases Of Minerals In Place ProvedDevelopedAndUndevelopedReservesPurchasesOfMineralsInPlace	0	Bcf
CY2021	srt	Proved Developed And Undeveloped Reserves Extensions Discoveries And Additions ProvedDevelopedAndUndevelopedReservesExtensionsDiscoveriesAndAdditions	695000000	Bcf
CY2021	srt	Proved Developed And Undeveloped Reserves Sales Of Minerals In Place ProvedDevelopedAndUndevelopedReservesSalesOfMineralsInPlace	0	Bcf
CY2021	srt	Proved Developed And Undeveloped Reserves Revisions Of Previous Estimates Increase Decrease ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease	-982000000	Bcf
CY2021	srt	Proved Developed And Undeveloped Reserves Production ProvedDevelopedAndUndevelopedReservesProduction	366000000	Bcf
CY2021Q4	srt	Proved Developed And Undeveloped Reserves Net ProvedDevelopedAndUndevelopedReservesNet	3898000000	Bcf
CY2019Q4	srt	Proved Developed Reserves Volume ProvedDevelopedReservesVolume	1984000000	Bcf
CY2020Q4	srt	Proved Developed Reserves Volume ProvedDevelopedReservesVolume	1527000000	Bcf
CY2020Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows	425000000	USD
CY2019Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows	1844000000	USD
CY2021Q4	srt	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	4138000000	USD
CY2021Q4	srt	Proved Developed Reserves Volume ProvedDevelopedReservesVolume	2165000000	Bcf
CY2019Q4	srt	Proved Undeveloped Reserve Volume ProvedUndevelopedReserveVolume	2544000000	Bcf
CY2020Q4	srt	Proved Undeveloped Reserve Volume ProvedUndevelopedReserveVolume	1061000000	Bcf
CY2021Q4	srt	Proved Undeveloped Reserve Volume ProvedUndevelopedReserveVolume	1733000000	Bcf
CY2021	srt	Proved Developed And Undeveloped Reserve Extension And Discovery Energy ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy	694.6	Bcfe
CY2020	srt	Proved Developed And Undeveloped Reserve Extension And Discovery Energy ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy	239.8	Bcfe
CY2019	srt	Proved Developed And Undeveloped Reserve Extension And Discovery Energy ProvedDevelopedAndUndevelopedReserveExtensionAndDiscoveryEnergy	1.1	Tcfe
CY2021Q4	gpor	Proved Developed And Undeveloped Reserve Cost Next Twelve Months ProvedDevelopedAndUndevelopedReserveCostNextTwelveMonths	234100000	USD
CY2021Q4	gpor	Proved Developed And Undeveloped Reserve Cost Year Two ProvedDevelopedAndUndevelopedReserveCostYearTwo	184000000	USD
CY2021Q4	gpor	Proved Developed And Undeveloped Reserve Cost Year Three ProvedDevelopedAndUndevelopedReserveCostYearThree	178700000	USD
CY2021Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	14938000000	USD
CY2020Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	4079000000	USD
CY2019Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	10451000000	USD
CY2021Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts	1141000000	USD
CY2020Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts	652000000	USD
CY2019Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts	2058000000	USD
CY2021Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts	5227000000	USD
CY2020Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts	2325000000	USD
CY2019Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts	4513000000	USD
CY2021Q4	gpor	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production Taxes DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionTaxes	336000000	USD
CY2020Q4	gpor	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production Taxes DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionTaxes	137000000	USD
CY2019Q4	gpor	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production Taxes DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionTaxes	333000000	USD
CY2021Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	437000000	USD
CY2020Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	0	USD
CY2019Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	0	USD
CY2021Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	7797000000	USD
CY2020Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	965000000	USD
CY2019Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	3547000000	USD
CY2021Q4	srt	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows	3659000000	USD
CY2020Q4	srt	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	540000000	USD
CY2019Q4	srt	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	1703000000	USD
CY2021	srt	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	1035000000	USD
CY2020	srt	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	264000000	USD
CY2019	srt	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	734000000	USD
CY2021	gpor	Net Changes In Prices Production Costs And Development NetChangesInPricesProductionCostsAndDevelopment	2596000000	USD
CY2020	gpor	Net Changes In Prices Production Costs And Development NetChangesInPricesProductionCostsAndDevelopment	-954000000	USD
CY2019	gpor	Net Changes In Prices Production Costs And Development NetChangesInPricesProductionCostsAndDevelopment	-1372000000	USD
CY2021	srt	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	0	USD
CY2020	srt	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	0	USD
CY2019	srt	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	0	USD
CY2021	srt	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	639000000	USD
CY2020	srt	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	38000000	USD
CY2019	srt	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	388000000	USD
CY2021	srt	Previously Estimated Development Costs Incurred PreviouslyEstimatedDevelopmentCostsIncurred	149000000	USD
CY2020	srt	Previously Estimated Development Costs Incurred PreviouslyEstimatedDevelopmentCostsIncurred	215000000	USD
CY2019	srt	Previously Estimated Development Costs Incurred PreviouslyEstimatedDevelopmentCostsIncurred	406000000	USD
CY2021	srt	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	858000000	USD
CY2020	srt	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-255000000	USD
CY2019	srt	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-321000000	USD
CY2021	srt	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	1000000	USD
CY2020	srt	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	6000000	USD
CY2019	srt	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	49000000	USD
CY2021	srt	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	54000000	USD
CY2020	srt	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	170000000	USD
CY2019	srt	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	298000000	USD
CY2021	srt	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	-178000000	USD
CY2020	srt	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	0	USD
CY2019	srt	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	425000000	USD
CY2021	gpor	Change In Production Rates And Other ChangeInProductionRatesAndOther	516000000	USD
CY2020	gpor	Change In Production Rates And Other ChangeInProductionRatesAndOther	-109000000	USD
CY2019	gpor	Change In Production Rates And Other ChangeInProductionRatesAndOther	-319000000	USD
CY2021	srt	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Period Increase Decrease StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesPeriodIncreaseDecrease	3598000000	USD
CY2020	srt	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Period Increase Decrease StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesPeriodIncreaseDecrease	-1165000000	USD
CY2019	srt	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Period Increase Decrease StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesPeriodIncreaseDecrease	-1278000000	USD

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$GPOR
GULFPORT ENERGY CORP Stock $gpor

2021 Q4 Form 10-K Financial Statement

#000162828022004445 Filed on March 01, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GPOR GULFPORT ENERGY CORP Stock $gpor

2021 Q4 Form 10-K Financial Statement

#000162828022004445 Filed on March 01, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GPOR
GULFPORT ENERGY CORP Stock $gpor