$GPOR
GULFPORT ENERGY CORP Stock $gpor

$gpor Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-Q Financial Statement

#000162828019013027 Filed on November 01, 2019

Income Statement

Concept	2019 Q4	2019 Q3	2018 Q3
Revenue	$336.5M	$341.7M	$361.0M
YoY Change	-19.11%	-5.32%	35.96%
Cost Of Revenue	$24.32M	$135.0M	$78.91M
YoY Change	-34.48%	71.08%	210.68%
Gross Profit	$256.9M	$206.7M	$282.0M
YoY Change	-32.18%	-26.7%	17.47%
Gross Profit Margin	76.37%	60.5%	78.14%
Selling, General & Admin	$79.49M	$148.2M	$94.76M
YoY Change	-3.86%	56.4%	15.0%
% of Gross Profit	30.94%	71.69%	33.6%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$143.5M	$163.3M	$119.9M
YoY Change	7.2%	36.15%	12.44%
% of Gross Profit	55.83%	78.97%	42.52%
Operating Expenses	$223.7M	$304.0M	$247.4M
YoY Change	2.83%	22.89%	15.06%
Operating Profit	-$1.444B	-$571.0M	$115.1M
YoY Change	-1022.93%	-595.98%	128.03%
Interest Expense	-$84.30M	$35.56M	$33.25M
YoY Change	221.54%	6.93%	22.57%
% of Operating Profit			28.89%
Other Income/Expense, Net	$32.00K	-$57.89M	-$18.43M
YoY Change	-103.03%	214.2%	-37.51%
Pretax Income	-$1.499B	-$628.8M	$95.15M
YoY Change	-1218.6%	-760.9%	353.14%
Income Tax	$315.8M	-$144.0M	$0.00
% Of Pretax Income			0.0%
Net Earnings	-$1.815B	-$484.8M	$95.15M
YoY Change	-1454.28%	-609.51%	421.8%
Net Earnings / Revenue	-539.35%	-141.86%	26.36%
Basic Earnings Per Share	-$11.36	-$3.04	$0.55
Diluted Earnings Per Share	-$11.36	-$3.04	$0.55
COMMON SHARES
Basic Shares Outstanding	159.7M shares	159.5M shares	173.1M shares
Diluted Shares Outstanding		159.5M shares	173.3M shares

Balance Sheet

Concept	2019 Q4	2019 Q3	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$6.060M	$10.12M	$124.6M
YoY Change	-88.41%	-91.87%	-0.58%
Cash & Equivalents	$6.060M	$10.12M	$124.6M
Short-Term Investments
Other Short-Term Assets	$130.6M	$140.2M	$29.55M
YoY Change	316.44%	374.53%	-27.92%
Inventory
Prepaid Expenses
Receivables	$121.2M	$112.7M	$157.4M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$305.9M	$304.3M	$351.1M
YoY Change	-3.31%	-13.32%	1.26%
LONG-TERM ASSETS
Property, Plant & Equipment	$3.464B	$5.585B	$5.523B
YoY Change	-36.79%	1.12%	12.54%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$32.04M	$73.96M	$232.5M
YoY Change	-86.43%	-68.19%	-16.74%
Other Assets	$15.54M	$11.65M	$17.04M
YoY Change	12.58%	-31.61%	-10.26%
Total Long-Term Assets	$3.577B	$5.969B	$5.784B
YoY Change	-37.63%	3.19%	10.58%
TOTAL ASSETS
Total Short-Term Assets	$305.9M	$304.3M	$351.1M
Total Long-Term Assets	$3.577B	$5.969B	$5.784B
Total Assets	$3.883B	$6.273B	$6.135B
YoY Change	-35.83%	2.25%	10.0%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$415.2M	$439.0M	$582.5M
YoY Change	-19.9%	-24.63%	-0.07%
Accrued Expenses	$35.05M	$33.87M	$0.00
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$631.0K	$622.0K	$647.0K
YoY Change	-3.07%	-3.86%	13.51%
Total Short-Term Liabilities	$451.2M	$473.9M	$645.8M
YoY Change	-16.36%	-26.62%	5.39%
LONG-TERM LIABILITIES
Long-Term Debt	$1.978B	$2.077B	$2.101B
YoY Change	-5.21%	-1.15%	7.29%
Other Long-Term Liabilities	$135.9M	$160.4M	$0.00
YoY Change			-100.0%
Total Long-Term Liabilities	$2.117B	$2.077B	$2.101B
YoY Change	1.45%	-1.15%	7.29%
TOTAL LIABILITIES
Total Short-Term Liabilities	$451.2M	$473.9M	$645.8M
Total Long-Term Liabilities	$2.117B	$2.077B	$2.101B
Total Liabilities	$2.568B	$2.714B	$2.843B
YoY Change	-5.69%	-4.54%	7.9%
SHAREHOLDERS EQUITY
Retained Earnings	-$2.848B	-$596.9M	-$979.4M
YoY Change	236.86%	-39.05%	-31.63%
Common Stock	$1.597M	$1.597M	$1.732M
YoY Change	-2.02%	-7.79%	-5.41%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.315B	$3.123B	$3.292B
YoY Change
Total Liabilities & Shareholders Equity	$3.883B	$6.273B	$6.135B
YoY Change	-35.83%	2.25%	10.0%

Cashflow Statement

Concept	2019 Q4	2019 Q3	2018 Q3
OPERATING ACTIVITIES
Net Income	-$1.815B	-$484.8M	$95.15M
YoY Change	-1454.28%	-609.51%	421.8%
Depreciation, Depletion And Amortization	$143.5M	$163.3M	$119.9M
YoY Change	7.2%	36.15%	12.44%
Cash From Operating Activities	$106.6M	$217.6M	$219.8M
YoY Change	-31.41%	-1.01%	7.22%
INVESTING ACTIVITIES
Capital Expenditures	-$73.85M	-$138.6M	-$198.2M
YoY Change	-39.82%	-30.08%	-40.81%
Acquisitions
YoY Change
Other Investing Activities	$37.73M	$10.19M	$4.152M
YoY Change	8735.13%	145.5%	-124.42%
Cash From Investing Activities	-$36.12M	-$128.4M	-$194.1M
YoY Change	-70.46%	-33.83%	-44.85%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-74.58M	-99.82M	-20.30M
YoY Change	-29.28%	391.78%	-113.15%
NET CHANGE
Cash From Operating Activities	106.6M	217.6M	219.8M
Cash From Investing Activities	-36.12M	-128.4M	-194.1M
Cash From Financing Activities	-74.58M	-99.82M	-20.30M
Net Change In Cash	-4.064M	-10.65M	5.414M
YoY Change	-94.38%	-296.77%	-27.81%
FREE CASH FLOW
Cash From Operating Activities	$106.6M	$217.6M	$219.8M
Capital Expenditures	-$73.85M	-$138.6M	-$198.2M
Free Cash Flow	$180.5M	$356.2M	$418.0M
YoY Change	-35.12%	-14.79%	-22.57%

Facts In Submission

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	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
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CY2019Q2	gpor	Site Contingency Numberof Siteswith Violation SiteContingencyNumberofSiteswithViolation	1	violation
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	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	73-1521290
	dei	Entity Address City Or Town EntityAddressCityOrTown	Oklahoma City,
	dei	Entity Address Address Line1 EntityAddressAddressLine1	3001 Quail Springs Parkway
	dei	Entity Address State Or Province EntityAddressStateOrProvince	OK
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	73134
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	dei	Document Period End Date DocumentPeriodEndDate	2019-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	000-19514
	dei	Entity Registrant Name EntityRegistrantName	Gulfport Energy Corp
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
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	dei	City Area Code CityAreaCode	405
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	dei	Security12b Title Security12bTitle	Common stock, par value $0.01 per share
	dei	Trading Symbol TradingSymbol	GPOR
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2018Q3	us-gaap	Interest Expense InterestExpense	33253000	USD
	us-gaap	Interest Expense InterestExpense	103095000	USD
	us-gaap	Interest Expense InterestExpense	100922000	USD
CY2019Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	338000	USD
CY2018Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	92000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	649000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	162000	USD
CY2019Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	23600000	USD
CY2018Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	23600000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019Q3	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	0	USD
CY2018Q3	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	2733000	USD
	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	0	USD
	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	124768000	USD
CY2019Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-43082000	USD
CY2018Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	12858000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-164391000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	35282000	USD
CY2019Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-3194000	USD
CY2018Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-856000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-3757000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-485000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-75274000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	95150000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	42593000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	296490000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-26522000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2019Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-56433000	USD
CY2018Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-18426000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-246994000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	58805000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-205853000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-69000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-48752000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	95150000	USD
	us-gaap	Net Income Loss NetIncomeLoss	248446000	USD
	us-gaap	Net Income Loss NetIncomeLoss	296559000	USD
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.31
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.55
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.55
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.69
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.31
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.55
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.51
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.68
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	159548477	shares
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	173057538	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	160553796	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	175776312	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	159548477	shares
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	173304914	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	164820002	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	176440461	shares
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	95150000	USD
	us-gaap	Net Income Loss NetIncomeLoss	248446000	USD
	us-gaap	Net Income Loss NetIncomeLoss	296559000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-2064000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	3052000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	5347000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-5815000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2064000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3052000	USD
CY2018Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3614000	USD
CY2018Q3	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	5000000	USD
CY2018Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	5347000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-5815000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-50816000	USD
CY2018Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	98202000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	253793000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	290744000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	3327768000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	62242000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3801000	USD
CY2019Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2785000	USD
CY2019Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	28330000	USD
CY2019Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	3368266000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	234956000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3610000	USD
CY2019Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2846000	USD
CY2019Q2	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	2270000	USD
CY2019Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	3607408000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-48752000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2064000	USD
CY2019Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2651000	USD
CY2019Q3	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	89000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	3559154000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	3101614000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	90090000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-5503000	USD
CY2018Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2685000	USD
CY2018Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	99997000	USD
CY2018Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2018Q1	us-gaap	Stockholders Equity StockholdersEquity	3088889000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	111319000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-3364000	USD
CY2018Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3355000	USD
CY2018Q2	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	5000000	USD
CY2018Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	3195199000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	95150000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3052000	USD
	us-gaap	Net Income Loss NetIncomeLoss	248446000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	3292015000	USD
	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	777104000	USD
	us-gaap	Net Income Loss NetIncomeLoss	296559000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	3173000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	3056000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	388874000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	352848000	USD
	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	35647000	USD
	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	0	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	4969000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	5792000	USD
	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-164532000	USD
	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	35040000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	23600000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	97425000	USD
	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-106373000	USD
	gpor	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	-205853000	USD
	gpor	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	-69000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	4821000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	4554000	USD
	gpor	Equity Method Investment Realized Gain Losson Disposaland Other Assets EquityMethodInvestmentRealizedGainLossonDisposalandOtherAssets	178000	USD
	gpor	Equity Method Investment Realized Gain Losson Disposaland Other Assets EquityMethodInvestmentRealizedGainLossonDisposalandOtherAssets	124768000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	2457000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	1978000	USD
	gpor	Increase Decreasein Accounts Receivable Oiland Natural Gas IncreaseDecreaseinAccountsReceivableOilandNaturalGas	-97543000	USD
	gpor	Increase Decreasein Accounts Receivable Oiland Natural Gas IncreaseDecreaseinAccountsReceivableOilandNaturalGas	10618000	USD
	gpor	Increase Decreasein Accounts Receivable Joint Operationsand Other IncreaseDecreaseinAccountsReceivableJointOperationsandOther	18830000	USD
	gpor	Increase Decreasein Accounts Receivable Joint Operationsand Other IncreaseDecreaseinAccountsReceivableJointOperationsandOther	2277000	USD
	us-gaap	Increase Decrease In Accounts Receivable Related Parties IncreaseDecreaseInAccountsReceivableRelatedParties	0	USD
	us-gaap	Increase Decrease In Accounts Receivable Related Parties IncreaseDecreaseInAccountsReceivableRelatedParties	79000	USD
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-4359000	USD
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	4830000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	30000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-1228000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	8567000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	36809000	USD
	gpor	Increase Decrease In Asset Retirement Obligation IncreaseDecreaseInAssetRetirementObligation	-117000	USD
	gpor	Increase Decrease In Asset Retirement Obligation IncreaseDecreaseInAssetRetirementObligation	-719000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	617355000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	630797000	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	4694000	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	7134000	USD
	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	646535000	USD
	us-gaap	Proceeds From Sale Of Other Property Plant And Equipment ProceedsFromSaleOfOtherPropertyPlantAndEquipment	204000	USD
	us-gaap	Proceeds From Sale Of Other Property Plant And Equipment ProceedsFromSaleOfOtherPropertyPlantAndEquipment	217000	USD
	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	10864000	USD
	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	4820000	USD
	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	0	USD
	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	226487000	USD
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	432000	USD
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	2318000	USD
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	1945000	USD
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	446000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-638648000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-554586000	USD
	us-gaap	Repayments Of Debt RepaymentsOfDebt	550500000	USD
	us-gaap	Repayments Of Debt RepaymentsOfDebt	165428000	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	640000000	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	225000000	USD
	us-gaap	Early Repayment Of Senior Debt EarlyRepaymentOfSeniorDebt	79480000	USD
	us-gaap	Early Repayment Of Senior Debt EarlyRepaymentOfSeniorDebt	0	USD
	us-gaap	Payments Of Loan Costs PaymentsOfLoanCosts	211000	USD
	us-gaap	Payments Of Loan Costs PaymentsOfLoanCosts	772000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	30689000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	109997000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-20880000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-51197000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-42173000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	25014000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	52297000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	99557000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	10124000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	124571000	USD
	us-gaap	Interest Paid Net InterestPaidNet	85272000	USD
	us-gaap	Interest Paid Net InterestPaidNet	75045000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-1794000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	0	USD
	gpor	Capitalized Stock Based Compensation CapitalizedStockBasedCompensation	3313000	USD
	gpor	Capitalized Stock Based Compensation CapitalizedStockBasedCompensation	3862000	USD
	gpor	Asset Retirement Obligation Liabilities Incurred Including Revisionof Estimate AssetRetirementObligationLiabilitiesIncurredIncludingRevisionofEstimate	6846000	USD
	gpor	Asset Retirement Obligation Liabilities Incurred Including Revisionof Estimate AssetRetirementObligationLiabilitiesIncurredIncludingRevisionofEstimate	1094000	USD
	gpor	Asset Retirement Obligation Removed Due To Divestiture AssetRetirementObligationRemovedDueToDivestiture	30035000	USD
	gpor	Asset Retirement Obligation Removed Due To Divestiture AssetRetirementObligationRemovedDueToDivestiture	0	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	2782000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	3956000	USD
	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	26300000	USD
	gpor	Noncashor Part Noncash Acquisition Contingent Consideration NoncashorPartNoncashAcquisitionContingentConsideration	-1137000	USD
	gpor	Noncashor Part Noncash Acquisition Contingent Consideration NoncashorPartNoncashAcquisitionContingentConsideration	0	USD
	gpor	Foreign Currency Translation Gain Loss On Investment In Equity Method Investment ForeignCurrencyTranslationGainLossOnInvestmentInEquityMethodInvestment	5347000	USD
	gpor	Foreign Currency Translation Gain Loss On Investment In Equity Method Investment ForeignCurrencyTranslationGainLossOnInvestmentInEquityMethodInvestment	-5815000	USD
CY2019Q3	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	10551713000	USD
CY2018Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	10026836000	USD
CY2019Q3	gpor	Property Plantand Equipment Other Gross Excluding Land PropertyPlantandEquipmentOtherGrossExcludingLand	90712000	USD
CY2018Q4	gpor	Property Plantand Equipment Other Gross Excluding Land PropertyPlantandEquipmentOtherGrossExcludingLand	87146000	USD
CY2019Q3	us-gaap	Land Land	5521000	USD
CY2018Q4	us-gaap	Land Land	5521000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	10647946000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	10119503000	USD
CY2019Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	5063413000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	4640098000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5584533000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5479405000	USD
CY2019Q3	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	35600000	USD
	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	0	USD
CY2019Q3	gpor	Cumulative Capitalization Of General And Administrative Costs Incurred And Capitalized To Full Cost Pool CumulativeCapitalizationOfGeneralAndAdministrativeCostsIncurredAndCapitalizedToFullCostPool	229600000	USD
CY2019Q3	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	9800000	USD
CY2018Q3	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	10600000	USD
	gpor	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	28800000	USD
	gpor	Depletionper Mc Fof Gas Equivalent DepletionperMCFofGasEquivalent	1.01	usd_per_mcf
	gpor	Depletionper Mc Fof Gas Equivalent DepletionperMCFofGasEquivalent	0.94	usd_per_mcf
CY2019Q3	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	2814334000	USD
CY2018Q4	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	2900000000	USD
CY2019Q3	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	9200000	USD
CY2019Q3	gpor	Disposal Group Including Discontinued Operation Contingent Payment Period DisposalGroupIncludingDiscontinuedOperationContingentPaymentPeriod	P2Y
	gpor	Asset Retirement Obligation Liabilities Removed Due To Divestitures AssetRetirementObligationLiabilitiesRemovedDueToDivestitures	30000000.0	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	79952000	USD
CY2017Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	75100000	USD
	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	5769000	USD
	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	1468000	USD
	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	117000	USD
	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	719000	USD
	gpor	Asset Retirement Obligation Removed Due To Divestiture AssetRetirementObligationRemovedDueToDivestiture	30035000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	3173000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	3056000	USD
	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	1077000	USD
	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-374000	USD
CY2019Q3	us-gaap	Asset Retirement Obligation AssetRetirementObligation	59819000	USD
CY2018Q3	us-gaap	Asset Retirement Obligation AssetRetirementObligation	78531000	USD
CY2019Q3	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	0	USD
CY2018Q3	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	120000	USD
CY2019Q3	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	59819000	USD
CY2018Q3	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	78411000	USD
CY2019Q3	us-gaap	Equity Method Investments EquityMethodInvestments	73962000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	236121000	USD
CY2019Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-43082000	USD
CY2018Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	12858000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-164391000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	35282000	USD
CY2019Q3	us-gaap	Equity Method Investment Summarized Financial Information Current Assets EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	427643000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Assets EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	471733000	USD
CY2019Q3	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Assets EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets	1309729000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Assets EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets	1302488000	USD
CY2019Q3	us-gaap	Equity Method Investment Summarized Financial Information Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	130465000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	239975000	USD
CY2019Q3	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Liabilities EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities	176145000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Liabilities EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities	94575000	USD
CY2019Q3	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	113417000	USD
CY2018Q3	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	384043000	USD
	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	557375000	USD
	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	1451580000	USD
CY2019Q3	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	-35730000	USD
CY2018Q3	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	68414000	USD
	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	-15046000	USD
	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	181884000	USD
CY2019Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	26052000	USD
CY2018Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	30733000	USD
CY2019Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	622000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	651000	USD
CY2019Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2076569000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2086765000	USD
CY2019Q3	gpor	Interest Cost Capitalized Undeveloped Properties InterestCostCapitalizedUndevelopedProperties	1000000.0	USD
	gpor	Interest Cost Capitalized Undeveloped Properties InterestCostCapitalizedUndevelopedProperties	2800000	USD
CY2018Q3	gpor	Interest Cost Capitalized Undeveloped Properties InterestCostCapitalizedUndevelopedProperties	1600000	USD
	gpor	Interest Cost Capitalized Undeveloped Properties InterestCostCapitalizedUndevelopedProperties	4000000.0	USD
CY2018Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	100000000	USD
CY2018	gpor	Stock Repurchasedand Retired During Period Value Net Of Tax StockRepurchasedandRetiredDuringPeriodValueNetOfTax	200000000.0	USD
CY2019Q1	us-gaap	Stock Repurchase Program Period In Force1 StockRepurchaseProgramPeriodInForce1	P24M
CY2019Q3	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	100000	shares
CY2019Q3	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	100000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	700000	USD
CY2019Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2700000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8300000	USD
CY2019Q3	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	1100000	USD
	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	3300000	USD
CY2018Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3600000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9700000	USD
CY2018Q3	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	1400000	USD
	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	3900000	USD
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	gpor	Sharebased Compensation Arrangementby Sharebased Payment Award Relative Total Shareholder Return Target Award Maximum SharebasedCompensationArrangementbySharebasedPaymentAwardRelativeTotalShareholderReturnTargetAwardMaximum	2
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-48752000	USD
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	159548477	shares
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.31
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	95150000	USD
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	173057538	shares
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.55
CY2019Q3	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
CY2019Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2018Q3	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
CY2018Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	247376	shares
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-48752000	USD
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	159548477	shares
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.31
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	95150000	USD
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	173304914	shares
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.55
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	248446000	USD
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	160553796	shares
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.55
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	296559000	USD
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	175776312	shares
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.69
	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	4266206	shares
	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	664149	shares
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	248446000	USD
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	164820002	shares
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.51
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	296559000	USD
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	176440461	shares
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.68
CY2019Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2073638	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2019Q3	gpor	Supply Commitment Remainderof Fiscal Year SupplyCommitmentRemainderofFiscalYear	424000	MMBTU
CY2019Q3	gpor	Supply Commitment Duein Year Two SupplyCommitmentDueinYearTwo	314000	MMBTU
CY2019Q3	gpor	Supply Commitment Duein Year Three SupplyCommitmentDueinYearThree	192000	MMBTU
CY2019Q3	gpor	Supply Commitment Duein Year Four SupplyCommitmentDueinYearFour	70000	MMBTU
CY2019Q3	gpor	Supply Commitment Duein Year Five SupplyCommitmentDueinYearFive	17000	MMBTU
CY2019Q3	gpor	Supply Commitment Due After Fifth Year SupplyCommitmentDueAfterFifthYear	0	MMBTU
CY2019Q3	gpor	Supply Commitment Total SupplyCommitmentTotal	1017000	MMBTU
CY2019Q3	us-gaap	Other Commitment Due In Next Twelve Months OtherCommitmentDueInNextTwelveMonths	6000000	USD
CY2019Q3	us-gaap	Other Commitment Due In Second Year OtherCommitmentDueInSecondYear	24000000	USD
CY2019Q3	us-gaap	Other Commitment Due In Third Year OtherCommitmentDueInThirdYear	24000000	USD
CY2019Q3	us-gaap	Other Commitment OtherCommitment	54000000	USD
	gpor	Site Contingency Numberof Siteswith Violation SiteContingencyNumberofSiteswithViolation	12	site
CY2013Q4	gpor	Site Contingency Numberof Siteswith Violation SiteContingencyNumberofSiteswithViolation	1	site
CY2019Q3	us-gaap	Loss Contingency Accrual Carrying Value Current LossContingencyAccrualCarryingValueCurrent	100000	USD
	gpor	Contingent Consideration Fair Value ContingentConsiderationFairValue	-1100000	USD
CY2019Q3	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	134571000	USD
CY2018Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	21352000	USD
CY2019Q3	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	23419000	USD
CY2018Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	0	USD
CY2019Q3	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	429000	USD
CY2018Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	20401000	USD
CY2019Q3	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	72040000	USD
CY2018Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	13992000	USD
CY2019Q3	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	27074000	USD
CY2018Q3	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-9663000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	178169000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-96737000	USD
CY2019Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	157990000	USD
CY2019Q3	us-gaap	Derivative Asset Not Offset Policy Election Deduction DerivativeAssetNotOffsetPolicyElectionDeduction	72469000	USD
CY2019Q3	us-gaap	Derivative Asset Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	85521000	USD
CY2019Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	72469000	USD
CY2019Q3	us-gaap	Derivative Liability Not Offset Policy Election Deduction DerivativeLiabilityNotOffsetPolicyElectionDeduction	72469000	USD
CY2019Q3	us-gaap	Derivative Liability Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	0	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	21352000	USD
CY2018Q4	us-gaap	Derivative Asset Not Offset Policy Election Deduction DerivativeAssetNotOffsetPolicyElectionDeduction	19289000	USD
CY2018Q4	us-gaap	Derivative Asset Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	2063000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	34393000	USD
CY2018Q4	us-gaap	Derivative Liability Not Offset Policy Election Deduction DerivativeLiabilityNotOffsetPolicyElectionDeduction	19289000	USD
CY2018Q4	us-gaap	Derivative Liability Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	15104000	USD
	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	5800000	USD
CY2019Q3	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	112700000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	210200000	USD
	us-gaap	Revenue Performance Obligation Description Of Timing RevenuePerformanceObligationDescriptionOfTiming	However, settlement statements for certain sales may be received for 30 to 90 days after the date production is delivered, and as a result, the Company is required to estimate the amount of production that was delivered to the purchaser and the price that will be received for the sale of the product.
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	10190000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	31460000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	22731000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	115000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	90000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	30000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	64616000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	2247000	USD
CY2019Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	62369000	USD
CY2019Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	4551000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	20835000	USD
CY2019Q3	gpor	Operating Lease Cost Related Party OperatingLeaseCostRelatedParty	5610000	USD
	gpor	Operating Lease Cost Related Party OperatingLeaseCostRelatedParty	16830000	USD
CY2019Q3	us-gaap	Variable Lease Cost VariableLeaseCost	105000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	1065000	USD
CY2019Q3	gpor	Variable Lease Cost Related Party VariableLeaseCostRelatedParty	5357000	USD
	gpor	Variable Lease Cost Related Party VariableLeaseCostRelatedParty	64968000	USD
CY2019Q3	us-gaap	Short Term Lease Cost ShortTermLeaseCost	224000	USD
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	407000	USD
CY2019Q3	us-gaap	Lease Cost LeaseCost	15847000	USD
	us-gaap	Lease Cost LeaseCost	104105000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	146000	USD
	us-gaap	Operating Lease Payments Use OperatingLeasePaymentsUse	18998000	USD
	gpor	Operating Lease Payments Use Related Party OperatingLeasePaymentsUseRelatedParty	78518000	USD
CY2019Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P1Y9M25D
CY2019Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0366
CY2019Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	207400000	USD
CY2019Q3	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	28000000.0	USD
	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	207400000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	4800000	USD
CY2019Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	2.734
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.621
CY2019Q3	us-gaap	Operating Loss Carryforwards Valuation Allowance OperatingLossCarryforwardsValuationAllowance	207400000	USD
CY2019Q3	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	1600000	USD
	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	1700000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	10124000	USD
CY2019Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	112657000	USD
CY2019Q3	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	41327000	USD
CY2019Q3	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	0	USD
CY2019Q3	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	5658000	USD
CY2019Q3	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	134571000	USD
CY2019Q3	us-gaap	Assets Current AssetsCurrent	304337000	USD
CY2019Q3	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	10551713000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	96233000	USD
CY2019Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	5063413000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5584533000	USD
CY2019Q3	us-gaap	Equity Method Investments EquityMethodInvestments	73962000	USD
CY2019Q3	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	23419000	USD
CY2019Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	205853000	USD
CY2019Q3	us-gaap	Inventory Noncurrent InventoryNoncurrent	7022000	USD
CY2019Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	13920000	USD
CY2019Q3	gpor	Operating Lease Rightof Use Asset Related Parties OperatingLeaseRightofUseAssetRelatedParties	48449000	USD
CY2019Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	11653000	USD
CY2019Q3	gpor	Total Other Assets TotalOtherAssets	384278000	USD
CY2019Q3	us-gaap	Assets Assets	6273148000	USD
CY2019Q3	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	439019000	USD
CY2019Q3	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2019Q3	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	429000	USD
CY2019Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	12848000	USD
CY2019Q3	gpor	Operating Lease Liability Current Related Parties OperatingLeaseLiabilityCurrentRelatedParties	21017000	USD
CY2019Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	622000	USD
CY2019Q3	us-gaap	Liabilities Current LiabilitiesCurrent	473935000	USD
CY2019Q3	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	72040000	USD
CY2019Q3	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	59819000	USD
CY2019Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	3127000	USD
CY2019Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	1072000	USD
CY2019Q3	gpor	Operating Lease Liability Noncurrent Related Parties OperatingLeaseLiabilityNoncurrentRelatedParties	27432000	USD
CY2019Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2076569000	USD
CY2019Q3	us-gaap	Liabilities Liabilities	2713994000	USD
CY2019Q3	us-gaap	Common Stock Value CommonStockValue	1597000	USD
CY2019Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	4205158000	USD
CY2019Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-50679000	USD
CY2019Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-596922000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	3559154000	USD
CY2019Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6273148000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	52297000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	210200000	USD
CY2018Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	22497000	USD
CY2018Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	0	USD
CY2018Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	10017000	USD
CY2018Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	21352000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	316363000	USD
CY2018Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	10026836000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	92667000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	4640098000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5479405000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	236121000	USD
CY2018Q4	us-gaap	Inventory Noncurrent InventoryNoncurrent	5344000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	13803000	USD
CY2018Q4	gpor	Total Other Assets TotalOtherAssets	255268000	USD
CY2018Q4	us-gaap	Assets Assets	6051036000	USD
CY2018Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	518380000	USD
CY2018Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2018Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	20401000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	651000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	539432000	USD
CY2018Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	13992000	USD
CY2018Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	79952000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	3127000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2086765000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	2723268000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	1630000	USD
CY2018Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	4227532000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-56026000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-845368000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	3327768000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6051036000	USD
CY2019Q3	us-gaap	Revenues Revenues	285175000	USD
CY2019Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	22473000	USD
CY2019Q3	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	6565000	USD
CY2019Q3	us-gaap	Cost Of Revenue CostOfRevenue	78435000	USD
CY2019Q3	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	145490000	USD
CY2019Q3	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	35647000	USD
CY2019Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	14659000	USD
CY2019Q3	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	747000	USD
CY2019Q3	us-gaap	Operating Expenses OperatingExpenses	304016000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-18841000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	34095000	USD
CY2019Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	338000	USD
CY2019Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	23600000	USD
CY2019Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-43082000	USD
CY2019Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-3194000	USD
CY2019Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-56433000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-75274000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-26522000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-48752000	USD
CY2018Q3	us-gaap	Revenues Revenues	360962000	USD
CY2018Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	22325000	USD
CY2018Q3	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	9348000	USD
CY2018Q3	us-gaap	Cost Of Revenue CostOfRevenue	78913000	USD
CY2018Q3	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	119915000	USD
CY2018Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	15848000	USD
CY2018Q3	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1037000	USD
CY2018Q3	us-gaap	Operating Expenses OperatingExpenses	247386000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	113576000	USD
CY2018Q3	us-gaap	Interest Expense InterestExpense	33253000	USD
CY2018Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	92000	USD
CY2018Q3	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	2733000	USD
CY2018Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	12858000	USD
CY2018Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-856000	USD
CY2018Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-18426000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	95150000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	95150000	USD
	us-gaap	Revenues Revenues	1064747000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	64668000	USD
	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	22584000	USD
	us-gaap	Cost Of Revenue CostOfRevenue	220732000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	388874000	USD
	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	35647000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	39482000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	3173000	USD
	us-gaap	Operating Expenses OperatingExpenses	775160000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	289587000	USD
	us-gaap	Interest Expense InterestExpense	103095000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	649000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	23600000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-164391000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-3757000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-246994000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	42593000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-205853000	USD
	us-gaap	Net Income Loss NetIncomeLoss	248446000	USD
	us-gaap	Revenues Revenues	939094000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	64143000	USD
	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	23861000	USD
	us-gaap	Cost Of Revenue CostOfRevenue	214546000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	352848000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	42955000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	3056000	USD
	us-gaap	Operating Expenses OperatingExpenses	701409000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	237685000	USD
	us-gaap	Interest Expense InterestExpense	100922000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	162000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3052000	USD
CY2018Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	98202000	USD
	us-gaap	Net Income Loss NetIncomeLoss	248446000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	5347000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	5347000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	253793000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-2064000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2064000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-50816000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	95150000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	3052000	USD
	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	124768000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	35282000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-485000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	58805000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	296490000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-69000	USD
	us-gaap	Net Income Loss NetIncomeLoss	296559000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-48752000	USD
	us-gaap	Net Income Loss NetIncomeLoss	296559000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-5815000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-5815000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	290744000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	617355000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-638648000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-20880000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-42173000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	52297000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	10124000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	630797000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-554586000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-51197000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	25014000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	99557000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	124571000	USD

Files In Submission

Name	View Source	Status
0001628280-19-013027-index-headers.html	Edgar Link	pending
0001628280-19-013027-index.html	Edgar Link	pending
0001628280-19-013027.txt	Edgar Link	pending
0001628280-19-013027-xbrl.zip	Edgar Link	pending
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Financial_Report.xlsx	Edgar Link	pending
gpor-09302019x10xq.htm	Edgar Link	pending
gpor-09302019x10xq_htm.xml	Edgar Link	completed
gpor-09302019xex311.htm	Edgar Link	pending
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gpor-09302019xex321.htm	Edgar Link	pending
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gpor-20190930.xsd	Edgar Link	pending
gpor-20190930_cal.xml	Edgar Link	unprocessable
gpor-20190930_def.xml	Edgar Link	unprocessable
gpor-20190930_lab.xml	Edgar Link	unprocessable
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$GPOR
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2019 Q4 Form 10-Q Financial Statement

#000162828019013027 Filed on November 01, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GPOR GULFPORT ENERGY CORP Stock $gpor

2019 Q4 Form 10-Q Financial Statement

#000162828019013027 Filed on November 01, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GPOR
GULFPORT ENERGY CORP Stock $gpor