$MTDR
Matador Resources Co Stock $mtdr

$mtdr Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-K Financial Statement

#000152000619000048 Filed on March 01, 2019

Income Statement

Concept	2017 Q4	2016 Q4	2016
Revenue	$153.6M	$85.00M	$264.4M
YoY Change	80.71%	25.55%	-16.86%
Cost Of Revenue	$41.40M	$29.00M	$104.6M
YoY Change	42.76%	19.83%	11.51%
Gross Profit	$112.2M	$56.00M	$159.8M
YoY Change	100.36%	28.74%	-28.72%
Gross Profit Margin	73.05%	65.88%	60.43%
Selling, General & Admin	$16.30M	$15.60M	$55.10M
YoY Change	4.49%	34.48%	9.98%
% of Gross Profit	14.53%	27.86%	34.48%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$54.40M	$31.80M	$122.0M
YoY Change	71.07%	-9.92%	-31.76%
% of Gross Profit	48.48%	56.79%	76.38%
Operating Expenses	$71.10M	$47.80M	$178.4M
YoY Change	48.74%	1.27%	-22.33%
Operating Profit	$41.10M	$8.200M	-$177.2M
YoY Change	401.22%	-321.62%	-78.04%
Interest Expense	-$8.300M	-$8.000M	$28.20M
YoY Change	3.75%	21.21%	29.63%
% of Operating Profit	-20.19%	-97.56%
Other Income/Expense, Net	$1.600M	$0.00	$79.07M
YoY Change			-490.87%
Pretax Income	$34.30M	$104.4M	-$98.09M
YoY Change	-67.15%	-145.67%	-88.14%
Income Tax	-$59.70M	$100.0K	-$1.036M
% Of Pretax Income	-174.05%	0.1%
Net Earnings	$38.30M	$104.2M	-$97.42M
YoY Change	-63.24%	-145.23%	-85.66%
Net Earnings / Revenue	24.93%	122.59%	-36.84%
Basic Earnings Per Share			-$1.07
Diluted Earnings Per Share	$353.3K	$1.097M	-$1.07
COMMON SHARES
Basic Shares Outstanding	108.4M shares	93.47M shares	91.27M shares
Diluted Shares Outstanding			91.27M shares

Balance Sheet

Concept	2017 Q4	2016 Q4	2016
SHORT-TERM ASSETS
Cash & Short-Term Investments	$96.50M	$212.9M	$212.9M
YoY Change	-54.67%	1174.85%	1174.85%
Cash & Equivalents	$96.51M	$212.9M
Short-Term Investments
Other Short-Term Assets	$257.2M	$279.2M	$4.600M
YoY Change	-7.88%	337.59%	-92.79%
Inventory	$6.000M	$3.000M	$3.000M
Prepaid Expenses
Receivables	$65.96M	$34.15M	$53.50M
Other Receivables	$8.031M	$5.167M	$5.200M
Total Short-Term Assets	$257.2M	$279.2M	$279.2M
YoY Change	-7.88%	119.82%	119.84%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.881B	$1.185B	$1.185B
YoY Change	58.84%	17.0%	17.0%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$7.064M	$958.0K	$1.000M
YoY Change	637.37%	-33.84%	-28.57%
Total Long-Term Assets	$1.889B	$1.185B	$1.186B
YoY Change	59.3%	16.93%	16.92%
TOTAL ASSETS
Total Short-Term Assets	$257.2M	$279.2M	$279.2M
Total Long-Term Assets	$1.889B	$1.185B	$1.186B
Total Assets	$2.146B	$1.465B	$1.465B
YoY Change	46.5%	28.38%	28.38%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$11.76M	$4.674M	$6.400M
YoY Change	151.54%	-57.38%	-45.3%
Accrued Expenses	$174.3M	$101.5M	$101.5M
YoY Change	71.84%	9.84%	9.85%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$282.6M	$169.5M	$169.5M
YoY Change	66.72%	23.88%	23.9%
LONG-TERM LIABILITIES
Long-Term Debt	$574.1M	$573.9M	$573.9M
YoY Change	0.03%	46.66%	46.66%
Other Long-Term Liabilities	$6.385M	$7.544M	$29.80M
YoY Change	-15.36%	244.47%	-75.93%
Total Long-Term Liabilities	$605.5M	$603.7M	$603.7M
YoY Change	0.3%	17.21%	17.2%
TOTAL LIABILITIES
Total Short-Term Liabilities	$282.6M	$169.5M	$169.5M
Total Long-Term Liabilities	$605.5M	$603.7M	$603.7M
Total Liabilities	$888.1M	$773.2M	$774.5M
YoY Change	14.86%	18.61%	18.62%
SHAREHOLDERS EQUITY
Retained Earnings	-$510.5M	-$636.4M
YoY Change	-19.78%	18.08%
Common Stock	$1.085M	$995.0K
YoY Change	9.05%	16.24%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$69.00K	$0.00
YoY Change
Treasury Stock Shares	3.437K shares	6.833K shares
Shareholders Equity	$1.157B	$690.1M	$690.1M
YoY Change
Total Liabilities & Shareholders Equity	$2.146B	$1.465B	$1.465B
YoY Change	46.5%	28.38%	28.38%

Cashflow Statement

Concept	2017 Q4	2016 Q4	2016
OPERATING ACTIVITIES
Net Income	$38.30M	$104.2M	-$97.42M
YoY Change	-63.24%	-145.23%	-85.66%
Depreciation, Depletion And Amortization	$54.40M	$31.80M	$122.0M
YoY Change	71.07%	-9.92%	-31.76%
Cash From Operating Activities	$76.60M	$37.60M	$134.1M
YoY Change	103.72%	66.37%	-35.7%
INVESTING ACTIVITIES
Capital Expenditures	-$222.5M	-$108.6M	-$453.9M
YoY Change	104.88%	-5.97%	-8.71%
Acquisitions			$0.00
YoY Change			-100.0%
Other Investing Activities	-$4.700M	-$42.50M	$5.200M
YoY Change	-88.94%	-144.27%	-92.79%
Cash From Investing Activities	-$227.1M	-$151.1M	-$448.7M
YoY Change	50.3%	670.92%	5.55%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$288.5M
YoY Change			52.88%
Debt Paid & Issued, Net			$120.0M
YoY Change			-74.84%
Cash From Financing Activities	217.4M	262.7M	$467.7M
YoY Change	-17.24%	-131450.0%	107.92%
NET CHANGE
Cash From Operating Activities	76.60M	37.60M	$134.1M
Cash From Investing Activities	-227.1M	-151.1M	-$448.7M
Cash From Financing Activities	217.4M	262.7M	$467.7M
Net Change In Cash	66.90M	149.2M	$153.1M
YoY Change	-55.16%	5228.57%	1738.47%
FREE CASH FLOW
Cash From Operating Activities	$76.60M	$37.60M	$134.1M
Capital Expenditures	-$222.5M	-$108.6M	-$453.9M
Free Cash Flow	$299.1M	$146.2M	$588.0M
YoY Change	104.58%	5.87%	-16.68%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0001520006
CY2019Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	116388317	shares
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018Q2	dei	Entity Public Float EntityPublicFloat	3305546848	USD
CY2018	dei	Entity Registrant Name EntityRegistrantName	Matador Resources Co
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	dei	Entity Small Business EntitySmallBusiness	false
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2017Q4	mtdr	Accumulated Depreciation And Amortization Of Other Property And Equipment AccumulatedDepreciationAndAmortizationOfOtherPropertyAndEquipment	20637000	USD
CY2018Q4	mtdr	Accumulated Depreciation And Amortization Of Other Property And Equipment AccumulatedDepreciationAndAmortizationOfOtherPropertyAndEquipment	33939000	USD
CY2017	mtdr	Adjustmentsto Additional Paidin Capital Formationof Joint Venture AdjustmentstoAdditionalPaidinCapitalFormationofJointVenture	171500000	USD
CY2018	mtdr	Adjustmentsto Additional Paidin Capital Formationof Joint Venture AdjustmentstoAdditionalPaidinCapitalFormationofJointVenture	14700000	USD
CY2017Q4	mtdr	Advances From Joint Interest Owners For Costs Incurred On Joint Interest Wells AdvancesFromJointInterestOwnersForCostsIncurredOnJointInterestWells	2789000	USD
CY2018Q4	mtdr	Advances From Joint Interest Owners For Costs Incurred On Joint Interest Wells AdvancesFromJointInterestOwnersForCostsIncurredOnJointInterestWells	10968000	USD
CY2018	mtdr	Billing Date BillingDate	P30D
CY2016	mtdr	Capital Contributedto Corporate Joint Ventures CapitalContributedtoCorporateJointVentures	0	USD
CY2017	mtdr	Capital Contributedto Corporate Joint Ventures CapitalContributedtoCorporateJointVentures	171500000	USD
CY2018	mtdr	Capital Contributedto Corporate Joint Ventures CapitalContributedtoCorporateJointVentures	14700000	USD
CY2016	mtdr	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	15700000	USD
CY2017	mtdr	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	23100000	USD
CY2018	mtdr	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	29900000	USD
CY2016	mtdr	Common Stock And Restricted Stock Expense CommonStockAndRestrictedStockExpense	1000000	USD
CY2017	mtdr	Common Stock And Restricted Stock Expense CommonStockAndRestrictedStockExpense	3000000	USD
CY2018	mtdr	Common Stock And Restricted Stock Expense CommonStockAndRestrictedStockExpense	1600000	USD
CY2018	mtdr	Cost Incurred On Proved Reserves Transferred To Amortization Base CostIncurredOnProvedReservesTransferredToAmortizationBase	44500000	USD
CY2018	mtdr	Debt Instrument Secured Debt Percentage Of O Il And Gas Properties DebtInstrumentSecuredDebtPercentageOfOIlAndGasProperties	0.80
CY2017Q4	mtdr	Deferred Tax Asset Noncurrent Attributableto Percentage Depletion Carryover DeferredTaxAssetNoncurrentAttributabletoPercentageDepletionCarryover	1582000	USD
CY2018Q4	mtdr	Deferred Tax Asset Noncurrent Attributableto Percentage Depletion Carryover DeferredTaxAssetNoncurrentAttributabletoPercentageDepletionCarryover	1624000	USD
CY2017Q4	mtdr	Deferred Tax Assets Basis Increase Relatedtothe San Mateo Transaction DeferredTaxAssetsBasisIncreaseRelatedtotheSanMateoTransaction	18382000	USD
CY2018Q4	mtdr	Deferred Tax Assets Basis Increase Relatedtothe San Mateo Transaction DeferredTaxAssetsBasisIncreaseRelatedtotheSanMateoTransaction	0	USD
CY2017Q4	mtdr	Deferred Tax Assets Derivative Noncurrent DeferredTaxAssetsDerivativeNoncurrent	3200000	USD
CY2018Q4	mtdr	Deferred Tax Assets Derivative Noncurrent DeferredTaxAssetsDerivativeNoncurrent	0	USD
CY2017Q4	mtdr	Deferred Tax Assets Liabilities Netof Valuation Allowance Noncurrent DeferredTaxAssetsLiabilitiesNetofValuationAllowanceNoncurrent	0	USD
CY2018Q4	mtdr	Deferred Tax Assets Liabilities Netof Valuation Allowance Noncurrent DeferredTaxAssetsLiabilitiesNetofValuationAllowanceNoncurrent	7236000	USD
CY2017Q4	mtdr	Deferred Tax Assets Operating Loss Carryforwards Noncurrent DeferredTaxAssetsOperatingLossCarryforwardsNoncurrent	118134000	USD
CY2018Q4	mtdr	Deferred Tax Assets Operating Loss Carryforwards Noncurrent DeferredTaxAssetsOperatingLossCarryforwardsNoncurrent	116374000	USD
CY2017Q4	mtdr	Deferred Tax Liabilities Derivatives Non Current DeferredTaxLiabilitiesDerivativesNonCurrent	0	USD
CY2018Q4	mtdr	Deferred Tax Liabilities Derivatives Non Current DeferredTaxLiabilitiesDerivativesNonCurrent	10468000	USD
CY2017Q4	mtdr	Deferred Tax Liabilities Other Noncurrent DeferredTaxLiabilitiesOtherNoncurrent	11248000	USD
CY2018Q4	mtdr	Deferred Tax Liabilities Other Noncurrent DeferredTaxLiabilitiesOtherNoncurrent	2256000	USD
CY2016	mtdr	Defined Contribution Plan Employer Additional Discretionary Contribution Amount DefinedContributionPlanEmployerAdditionalDiscretionaryContributionAmount	0	USD
CY2017	mtdr	Defined Contribution Plan Employer Additional Discretionary Contribution Amount DefinedContributionPlanEmployerAdditionalDiscretionaryContributionAmount	0	USD
CY2018	mtdr	Defined Contribution Plan Employer Additional Discretionary Contribution Amount DefinedContributionPlanEmployerAdditionalDiscretionaryContributionAmount	0	USD
CY2016	mtdr	Defined Contribution Plan Employer Matching Contribution Amount DefinedContributionPlanEmployerMatchingContributionAmount	700000	USD
CY2017	mtdr	Defined Contribution Plan Employer Matching Contribution Amount DefinedContributionPlanEmployerMatchingContributionAmount	900000	USD
CY2018	mtdr	Defined Contribution Plan Employer Matching Contribution Amount DefinedContributionPlanEmployerMatchingContributionAmount	1100000	USD
CY2018Q4	mtdr	Derivative Asset Liability Net DerivativeAssetLiabilityNet	49846000	USD
CY2018Q4	mtdr	Derivative Asset Liability Subjectto Master Netting Arrangement DerivativeAssetLiabilitySubjecttoMasterNettingArrangement	-3207000	USD
CY2018	mtdr	Discounting Rate Present Value Of Future Revenue From Proved Oil And Gas Reserves DiscountingRatePresentValueOfFutureRevenueFromProvedOilAndGasReserves	0.1
CY2017Q4	mtdr	Dueto Joint Ventures Current DuetoJointVenturesCurrent	4873000	USD
CY2018Q4	mtdr	Dueto Joint Ventures Current DuetoJointVenturesCurrent	2373000	USD
CY2016	mtdr	Effective Income Tax Rate Reconciliation Changein State Deferred Tax Assets Valuation Allowance Amount EffectiveIncomeTaxRateReconciliationChangeinStateDeferredTaxAssetsValuationAllowanceAmount	-539000	USD
CY2017	mtdr	Effective Income Tax Rate Reconciliation Changein State Deferred Tax Assets Valuation Allowance Amount EffectiveIncomeTaxRateReconciliationChangeinStateDeferredTaxAssetsValuationAllowanceAmount	1139000	USD
CY2018	mtdr	Effective Income Tax Rate Reconciliation Changein State Deferred Tax Assets Valuation Allowance Amount EffectiveIncomeTaxRateReconciliationChangeinStateDeferredTaxAssetsValuationAllowanceAmount	-2924000	USD
CY2016	mtdr	Effective Income Tax Reconciliation Refundable Credit EffectiveIncomeTaxReconciliationRefundableCredit	0	USD
CY2017	mtdr	Effective Income Tax Reconciliation Refundable Credit EffectiveIncomeTaxReconciliationRefundableCredit	8178000	USD
CY2018	mtdr	Effective Income Tax Reconciliation Refundable Credit EffectiveIncomeTaxReconciliationRefundableCredit	455000	USD
CY2018Q3	mtdr	Gain Loss On Extinguishment Of Debt Premium On Debt Redemption GainLossOnExtinguishmentOfDebtPremiumOnDebtRedemption	31200000	USD
CY2016	mtdr	Gain Loss On Extinguishment Of Debt Premium On Debt Redemption GainLossOnExtinguishmentOfDebtPremiumOnDebtRedemption	0	USD
CY2017	mtdr	Gain Loss On Extinguishment Of Debt Premium On Debt Redemption GainLossOnExtinguishmentOfDebtPremiumOnDebtRedemption	0	USD
CY2018	mtdr	Gain Loss On Extinguishment Of Debt Premium On Debt Redemption GainLossOnExtinguishmentOfDebtPremiumOnDebtRedemption	-31226000	USD
CY2016	mtdr	Income Tax Reconciliation Income Federal Alternative Minimum Tax IncomeTaxReconciliationIncomeFederalAlternativeMinimumTax	1144000	USD
CY2017	mtdr	Income Tax Reconciliation Income Federal Alternative Minimum Tax IncomeTaxReconciliationIncomeFederalAlternativeMinimumTax	0	USD
CY2018	mtdr	Income Tax Reconciliation Income Federal Alternative Minimum Tax IncomeTaxReconciliationIncomeFederalAlternativeMinimumTax	0	USD
CY2016	mtdr	Income Tax Reconciliation Permanent Differences IncomeTaxReconciliationPermanentDifferences	-499000	USD
CY2017	mtdr	Income Tax Reconciliation Permanent Differences IncomeTaxReconciliationPermanentDifferences	-4740000	USD
CY2018	mtdr	Income Tax Reconciliation Permanent Differences IncomeTaxReconciliationPermanentDifferences	-2488000	USD
CY2016	mtdr	Increase Decrease In Liabilities For Support Equipment And Facilities IncreaseDecreaseInLiabilitiesForSupportEquipmentAndFacilities	-588000	USD
CY2017	mtdr	Increase Decrease In Liabilities For Support Equipment And Facilities IncreaseDecreaseInLiabilitiesForSupportEquipmentAndFacilities	-955000	USD
CY2018	mtdr	Increase Decrease In Liabilities For Support Equipment And Facilities IncreaseDecreaseInLiabilitiesForSupportEquipmentAndFacilities	2499000	USD
CY2016	mtdr	Increase Decrease In Payments Made In Advance By Joint Interest Partners In Oil And Gas Properties IncreaseDecreaseInPaymentsMadeInAdvanceByJointInterestPartnersInOilAndGasProperties	-1000000	USD
CY2017	mtdr	Increase Decrease In Payments Made In Advance By Joint Interest Partners In Oil And Gas Properties IncreaseDecreaseInPaymentsMadeInAdvanceByJointInterestPartnersInOilAndGasProperties	-1089000	USD
CY2018	mtdr	Increase Decrease In Payments Made In Advance By Joint Interest Partners In Oil And Gas Properties IncreaseDecreaseInPaymentsMadeInAdvanceByJointInterestPartnersInOilAndGasProperties	-8179000	USD
CY2016	mtdr	Increase Decreasein Asset Retirement Obligations Mineral Properties IncreaseDecreaseinAssetRetirementObligationsMineralProperties	3817000	USD
CY2017	mtdr	Increase Decreasein Asset Retirement Obligations Mineral Properties IncreaseDecreaseinAssetRetirementObligationsMineralProperties	4385000	USD
CY2018	mtdr	Increase Decreasein Asset Retirement Obligations Mineral Properties IncreaseDecreaseinAssetRetirementObligationsMineralProperties	2614000	USD
CY2016	mtdr	Increase Decreasein Asset Retirement Obligations Support Equipmentand Facilities IncreaseDecreaseinAssetRetirementObligationsSupportEquipmentandFacilities	222000	USD
CY2017	mtdr	Increase Decreasein Asset Retirement Obligations Support Equipmentand Facilities IncreaseDecreaseinAssetRetirementObligationsSupportEquipmentandFacilities	-60000	USD
CY2018	mtdr	Increase Decreasein Asset Retirement Obligations Support Equipmentand Facilities IncreaseDecreaseinAssetRetirementObligationsSupportEquipmentandFacilities	686000	USD
CY2016	mtdr	Increase Decreasein Liabilitiesfor Accrued Costto Issue Equity IncreaseDecreaseinLiabilitiesforAccruedCosttoIssueEquity	343000	USD
CY2017	mtdr	Increase Decreasein Liabilitiesfor Accrued Costto Issue Equity IncreaseDecreaseinLiabilitiesforAccruedCosttoIssueEquity	-343000	USD
CY2018	mtdr	Increase Decreasein Liabilitiesfor Accrued Costto Issue Equity IncreaseDecreaseinLiabilitiesforAccruedCosttoIssueEquity	0	USD
CY2016	mtdr	Increase Decreasein Liabilitiesfor Oiland Natural Gas Properties Capital Expenditures IncreaseDecreaseinLiabilitiesforOilandNaturalGasPropertiesCapitalExpenditures	1775000	USD
CY2017	mtdr	Increase Decreasein Liabilitiesfor Oiland Natural Gas Properties Capital Expenditures IncreaseDecreaseinLiabilitiesforOilandNaturalGasPropertiesCapitalExpenditures	48929000	USD
CY2018	mtdr	Increase Decreasein Liabilitiesfor Oiland Natural Gas Properties Capital Expenditures IncreaseDecreaseinLiabilitiesforOilandNaturalGasPropertiesCapitalExpenditures	-16802000	USD
CY2016	mtdr	Increasedecreaseinliabilitiesforaccruedcosttoissueseniornotes Increasedecreaseinliabilitiesforaccruedcosttoissueseniornotes	0	USD
CY2017	mtdr	Increasedecreaseinliabilitiesforaccruedcosttoissueseniornotes Increasedecreaseinliabilitiesforaccruedcosttoissueseniornotes	0	USD
CY2018	mtdr	Increasedecreaseinliabilitiesforaccruedcosttoissueseniornotes Increasedecreaseinliabilitiesforaccruedcosttoissueseniornotes	232000	USD
CY2016	mtdr	Issuance Of Restricted Stock Units For Board And Advisor Services IssuanceOfRestrictedStockUnitsForBoardAndAdvisorServices	992000	USD
CY2017	mtdr	Issuance Of Restricted Stock Units For Board And Advisor Services IssuanceOfRestrictedStockUnitsForBoardAndAdvisorServices	0	USD
CY2018	mtdr	Issuance Of Restricted Stock Units For Board And Advisor Services IssuanceOfRestrictedStockUnitsForBoardAndAdvisorServices	0	USD
CY2016	mtdr	Lease And Well Equipment Inventories LeaseAndWellEquipmentInventories	700000	USD
CY2017	mtdr	Lease And Well Equipment Inventories LeaseAndWellEquipmentInventories	3623000	USD
CY2018	mtdr	Lease And Well Equipment Inventories LeaseAndWellEquipmentInventories	12176000	USD
CY2016	mtdr	Lease Bonus Mineral Acreage Income LeaseBonusMineralAcreageIncome	0	USD
CY2017	mtdr	Lease Bonus Mineral Acreage Income LeaseBonusMineralAcreageIncome	0	USD
CY2018	mtdr	Lease Bonus Mineral Acreage Income LeaseBonusMineralAcreageIncome	2489000	USD
CY2018Q4	mtdr	Minimum Outstanding Aggregate Commitments MinimumOutstandingAggregateCommitments	24300000	USD
CY2016	mtdr	Netgainlossonassetsalesandinventoryimpairment Netgainlossonassetsalesandinventoryimpairment	-107277000	USD
CY2017	mtdr	Netgainlossonassetsalesandinventoryimpairment Netgainlossonassetsalesandinventoryimpairment	-23000	USD
CY2018	mtdr	Netgainlossonassetsalesandinventoryimpairment Netgainlossonassetsalesandinventoryimpairment	196000	USD
CY2016	mtdr	Number Of Purchasers NumberOfPurchasers	3	Purchasers
CY2017	mtdr	Number Of Purchasers NumberOfPurchasers	4	Purchasers
CY2018	mtdr	Number Of Purchasers NumberOfPurchasers	4	Purchasers
CY2017Q4	mtdr	Oil And Gas Property Full Cost Method Including Unproved And Unevaluated Gross OilAndGasPropertyFullCostMethodIncludingUnprovedAndUnevaluatedGross	3642166000	USD
CY2018Q4	mtdr	Oil And Gas Property Full Cost Method Including Unproved And Unevaluated Gross OilAndGasPropertyFullCostMethodIncludingUnprovedAndUnevaluatedGross	4979747000	USD
CY2016	mtdr	Oil And Gas Purchases Of Natural Gas OilAndGasPurchasesOfNaturalGas	0	USD
CY2017	mtdr	Oil And Gas Purchases Of Natural Gas OilAndGasPurchasesOfNaturalGas	0	USD
CY2018	mtdr	Oil And Gas Purchases Of Natural Gas OilAndGasPurchasesOfNaturalGas	6635000	USD
CY2018	mtdr	Past Due Days Of Account Receivable Considered Delinquent PastDueDaysOfAccountReceivableConsideredDelinquent	P60D
CY2017Q4	mtdr	Payables Intercompany PayablesIntercompany	0	USD
CY2018Q4	mtdr	Payables Intercompany PayablesIntercompany	0	USD
CY2016	mtdr	Prepayment Premium On Extinguishment Of Debt PrepaymentPremiumOnExtinguishmentOfDebt	0	USD
CY2017	mtdr	Prepayment Premium On Extinguishment Of Debt PrepaymentPremiumOnExtinguishmentOfDebt	0	USD
CY2018	mtdr	Prepayment Premium On Extinguishment Of Debt PrepaymentPremiumOnExtinguishmentOfDebt	31226000	USD
CY2016	mtdr	Production Taxes And Marketing ProductionTaxesAndMarketing	43046000	USD
CY2017	mtdr	Production Taxes And Marketing ProductionTaxesAndMarketing	58275000	USD
CY2018	mtdr	Production Taxes And Marketing ProductionTaxesAndMarketing	76138000	USD
CY2017Q4	mtdr	Receivables Intercompany ReceivablesIntercompany	0	USD
CY2018Q4	mtdr	Receivables Intercompany ReceivablesIntercompany	0	USD
CY2018	mtdr	Repay Deficit In Agreement Period RepayDeficitInAgreementPeriod	P6M
CY2018Q4	mtdr	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingAggregateIntrinsicValue	22000000	USD
CY2016	mtdr	Stock Based Compensation Expense Recognized As Liability StockBasedCompensationExpenseRecognizedAsLiability	569000	USD
CY2017	mtdr	Stock Based Compensation Expense Recognized As Liability StockBasedCompensationExpenseRecognizedAsLiability	362000	USD
CY2018	mtdr	Stock Based Compensation Expense Recognized As Liability StockBasedCompensationExpenseRecognizedAsLiability	-1069000	USD
CY2016	mtdr	Stock Issued During Period Value Common Stock To Board Members And Advisors StockIssuedDuringPeriodValueCommonStockToBoardMembersAndAdvisors	0	USD
CY2017	mtdr	Stock Issued During Period Value Common Stock To Board Members And Advisors StockIssuedDuringPeriodValueCommonStockToBoardMembersAndAdvisors	0	USD
CY2018	mtdr	Stock Issued During Period Value Common Stock To Board Members And Advisors StockIssuedDuringPeriodValueCommonStockToBoardMembersAndAdvisors	0	USD
CY2016	mtdr	Stock Issued During Period Value Stock Options Settled StockIssuedDuringPeriodValueStockOptionsSettled	255000	USD
CY2016	mtdr	Swing Sale Profit SwingSaleProfit	184625000	USD
CY2017	mtdr	Swing Sale Profit SwingSaleProfit	0	USD
CY2018	mtdr	Swing Sale Profit SwingSaleProfit	1051500000	USD
CY2017	mtdr	Tax Cutsand Jobs Actof2017 Incomplete Accounting Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit	51500000	USD
CY2016	mtdr	Transfer Of Inventory From Oil And Natural Gas Properties TransferOfInventoryFromOilAndNaturalGasProperties	395000	USD
CY2017	mtdr	Transfer Of Inventory From Oil And Natural Gas Properties TransferOfInventoryFromOilAndNaturalGasProperties	-374000	USD
CY2018	mtdr	Transfer Of Inventory From Oil And Natural Gas Properties TransferOfInventoryFromOilAndNaturalGasProperties	409000	USD
CY2016	mtdr	Transferofinventorytootherpropertyandequipment Transferofinventorytootherpropertyandequipment	0	USD
CY2017	mtdr	Transferofinventorytootherpropertyandequipment Transferofinventorytootherpropertyandequipment	-317000	USD
CY2018	mtdr	Transferofinventorytootherpropertyandequipment Transferofinventorytootherpropertyandequipment	0	USD
CY2018Q4	mtdr	Unamortized Deferred Finance Costs UnamortizedDeferredFinanceCosts	2000000	USD
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	11757000	USD
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	66970000	USD
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	65962000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	68161000	USD
CY2017	us-gaap	Accretion Expense AccretionExpense	1290000	USD
CY2018	us-gaap	Accretion Expense AccretionExpense	1530000	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	174348000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	170855000	USD
CY2017Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	61358000	USD
CY2018Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	64776000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2041806000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2306949000	USD
CY2017Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1666024000	USD
CY2018Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1924408000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	11958000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	19594000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	22660000	USD
CY2016Q1	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	800000	USD
CY2016Q4	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	400000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	1190000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	280000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	204000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	17200000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	0	USD
CY2016	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	1148000	USD
CY2017	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	468000	USD
CY2018	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	1357000	USD
CY2016Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	20640000	USD
CY2017Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	26256000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	31086000	USD
CY2016	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1182000	USD
CY2017	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1290000	USD
CY2018	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1530000	USD
CY2017Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	1176000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	1350000	USD
CY2017	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	2920000	USD
CY2017Q4	us-gaap	Assets Assets	2145690000	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	3566000	USD
CY2017	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	430000	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	708000	USD
CY2017	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	1836000	USD
CY2018	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	442000	USD
CY2017Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	25080000	USD
CY2018Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	29736000	USD
CY2016Q4	us-gaap	Assets Assets	1464665000	USD
CY2018Q4	us-gaap	Assets Assets	3455518000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	257170000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	305685000	USD
CY2016	us-gaap	Average Sales Prices AverageSalesPrices	2.48
CY2016	us-gaap	Average Sales Prices AverageSalesPrices	39.25
CY2017	us-gaap	Average Sales Prices AverageSalesPrices	2.98
CY2017	us-gaap	Average Sales Prices AverageSalesPrices	47.79
CY2018	us-gaap	Average Sales Prices AverageSalesPrices	3.10
CY2018	us-gaap	Average Sales Prices AverageSalesPrices	62.04
CY2017Q4	us-gaap	Capitalized Costs Unproved Properties CapitalizedCostsUnprovedProperties	637396000	USD
CY2018Q4	us-gaap	Capitalized Costs Unproved Properties CapitalizedCostsUnprovedProperties	1199511000	USD
CY2018Q4	us-gaap	Capitalized Costs Wells And Related Equipment And Facilities CapitalizedCostsWellsAndRelatedEquipmentAndFacilities	44500000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	212884000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	96505000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	64545000	USD
CY2015Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	61089000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	214142000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	102482000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	83984000	USD
CY2016	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	153053000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-111660000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-18498000	USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	160000000	shares
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	160000000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	108513597	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	116374503	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	108510160	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	116353590	shares
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	1085000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	1164000	USD
CY2016	us-gaap	Cost Of Services Oil And Gas CostOfServicesOilAndGas	5389000	USD
CY2017	us-gaap	Cost Of Services Oil And Gas CostOfServicesOilAndGas	13039000	USD
CY2018	us-gaap	Cost Of Services Oil And Gas CostOfServicesOilAndGas	24609000	USD
CY2016	us-gaap	Costs And Expenses CostsAndExpenses	441589000	USD
CY2017	us-gaap	Costs And Expenses CostsAndExpenses	383435000	USD
CY2018	us-gaap	Costs And Expenses CostsAndExpenses	536328000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-1144000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-8178000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-455000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-1036000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-8157000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-8200000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-455000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-500000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	108000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	21000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0	USD
CY2017Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	574073000	USD
CY2018Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	1037837000	USD
CY2016Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	1400000	USD
CY2017Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	400000	USD
CY2018Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	-1100000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-20457000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-7236000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	13221000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross Noncurrent DeferredTaxAssetsGrossNoncurrent	141298000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross Noncurrent DeferredTaxAssetsGrossNoncurrent	127113000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	51816000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	120594000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	20457000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	9115000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance Noncurrent DeferredTaxAssetsValuationAllowanceNoncurrent	89482000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance Noncurrent DeferredTaxAssetsValuationAllowanceNoncurrent	6519000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Gross Noncurrent DeferredTaxLiabilitiesGrossNoncurrent	51816000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Gross Noncurrent DeferredTaxLiabilitiesGrossNoncurrent	113358000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	0	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	13221000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	40568000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	100634000	USD
CY2016	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	900000	USD
CY2017	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1100000	USD
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1400000	USD
CY2018	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.03
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	122048000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	177502000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	265142000	USD
CY2017Q4	us-gaap	Derivative Assets DerivativeAssets	0	USD
CY2017Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	1190000	USD
CY2018Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	49929000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	53053000	USD
CY2017Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	15239000	USD
CY2017Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	16429000	USD
CY2018Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	0	USD
CY2017Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	0	USD
CY2018Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	83000	USD
CY2017Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	10302000	USD
CY2018Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	13052000	USD
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.07
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.23
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.41
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.07
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.23
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.41
CY2018	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	4400000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y7M25D
CY2018Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	9300000	USD
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4300000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	6800000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4800000	USD
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	500000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	5000000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	5700000	USD
CY2018Q4	us-gaap	Equity Method Investment Ownership Percentage EquityMethodInvestmentOwnershipPercentage	1.0
CY2016	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	9286000	USD
CY2017	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	-4321000	USD
CY2018	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	2334000	USD
CY2016	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	107277000	USD
CY2017	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	23000	USD
CY2018	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	-196000	USD
CY2016	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	55089000	USD
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	66016000	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	69308000	USD
CY2016	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	158633000	USD
CY2017	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	0	USD
CY2018	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	0	USD
CY2016	us-gaap	Income Loss Attributable To Noncontrolling Interest IncomeLossAttributableToNoncontrollingInterest	364000	USD
CY2017	us-gaap	Income Loss Attributable To Noncontrolling Interest IncomeLossAttributableToNoncontrollingInterest	12140000	USD
CY2018	us-gaap	Income Loss Attributable To Noncontrolling Interest IncomeLossAttributableToNoncontrollingInterest	25557000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-98093000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	129850000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	292073000	USD
CY2016	us-gaap	Income Loss From Subsidiaries Before Tax IncomeLossFromSubsidiariesBeforeTax	0	USD
CY2017	us-gaap	Income Loss From Subsidiaries Before Tax IncomeLossFromSubsidiariesBeforeTax	0	USD
CY2018	us-gaap	Income Loss From Subsidiaries Before Tax IncomeLossFromSubsidiariesBeforeTax	0	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1036000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-8157000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-7691000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	33688000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-101917000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-80003000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	51525000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-34333000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	45447000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	61543000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	539000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	368000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	16181000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	2895000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	USD
CY2016	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	14259000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	82549000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	4934000	USD
CY2016	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	-2848000	USD
CY2017	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	0	USD
CY2018	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	0	USD
CY2016	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	6611000	USD
CY2017	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	33559000	USD
CY2018	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	68647000	USD
CY2016	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	4144000	USD
CY2017	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	-1519000	USD
CY2018	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	-353000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-490000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	6425000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-3418000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	124000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	2960000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	1770000	USD
CY2016	us-gaap	Increase Decrease In Royalties Payable IncreaseDecreaseInRoyaltiesPayable	7495000	USD
CY2017	us-gaap	Increase Decrease In Royalties Payable IncreaseDecreaseInRoyaltiesPayable	37370000	USD
CY2018	us-gaap	Increase Decrease In Royalties Payable IncreaseDecreaseInRoyaltiesPayable	3418000	USD
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	514000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	111000	shares
CY2016	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	3700000	USD
CY2017	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	7300000	USD
CY2018	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	8800000	USD
CY2016	us-gaap	Interest Expense InterestExpense	28199000	USD
CY2017	us-gaap	Interest Expense InterestExpense	34565000	USD
CY2018	us-gaap	Interest Expense InterestExpense	41327000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	27464000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	32760000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	29474000	USD
CY2017Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	0	USD
CY2018Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	0	USD
CY2018Q4	us-gaap	Lessee Operating Lease Term Of Contract LesseeOperatingLeaseTermOfContract	P5Y
CY2018Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	3000000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2145690000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3455518000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	282606000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	330022000	USD
CY2017Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	605538000	USD
CY2018Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	1345839000	USD
CY2018Q4	us-gaap	Line Of Credit LineOfCredit	220000000	USD
CY2017Q4	us-gaap	Long Term Line Of Credit LongTermLineOfCredit	0	USD
CY2018Q4	us-gaap	Long Term Line Of Credit LongTermLineOfCredit	40000000	USD
CY2017Q4	us-gaap	Minority Interest MinorityInterest	100990000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	90777000	USD
CY2017	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	10045000	USD
CY2018	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	121520000	USD
CY2017	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	2653000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	467706000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	408499000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	888232000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-448739000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-819284000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1515253000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	134086000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	299125000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	608523000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	-97421000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	125867000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	274207000	USD
CY2016	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	364000	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	12140000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	25557000	USD
CY2017	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	44100000	USD
CY2018	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	85750000	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	79074000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-30991000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-71198000	USD
CY2017Q4	us-gaap	Notes Payable Fair Value Disclosure NotesPayableFairValueDisclosure	614100000	USD
CY2018Q4	us-gaap	Notes Payable Fair Value Disclosure NotesPayableFairValueDisclosure	968900000	USD
CY2018	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2017Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	67225000	USD
CY2018Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	61831000	USD
CY2017Q4	us-gaap	Oil And Gas Property Full Cost Method Depletion OilAndGasPropertyFullCostMethodDepletion	2021169000	USD
CY2018Q4	us-gaap	Oil And Gas Property Full Cost Method Depletion OilAndGasPropertyFullCostMethodDepletion	2273010000	USD
CY2017Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	3004770000	USD
CY2018Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	3780236000	USD
CY2017Q4	us-gaap	Oil And Gas Property Full Cost Method Net OilAndGasPropertyFullCostMethodNet	1620997000	USD
CY2018Q4	us-gaap	Oil And Gas Property Full Cost Method Net OilAndGasPropertyFullCostMethodNet	2706737000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	-177167000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	160841000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	363271000	USD
CY2016	us-gaap	Operating Lease Expense OperatingLeaseExpense	56202000	USD
CY2017	us-gaap	Operating Lease Expense OperatingLeaseExpense	67313000	USD
CY2018	us-gaap	Operating Lease Expense OperatingLeaseExpense	92966000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	28953000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	3091000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	4141000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	4009000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	3877000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	3914000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	9921000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	2900000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	2600000	USD
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	2700000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	4418000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	14189000	USD
CY2017Q4	us-gaap	Other Assets OtherAssets	7064000	USD
CY2018Q4	us-gaap	Other Assets OtherAssets	26969000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	257170000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	305685000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	7064000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	6512000	USD
CY2016	us-gaap	Other Income OtherIncome	-4000	USD
CY2017	us-gaap	Other Income OtherIncome	3551000	USD
CY2018	us-gaap	Other Income OtherIncome	1551000	USD
CY2017Q4	us-gaap	Other Inventory Net Of Reserves OtherInventoryNetOfReserves	5993000	USD
CY2018Q4	us-gaap	Other Inventory Net Of Reserves OtherInventoryNetOfReserves	17564000	USD
CY2017Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	750000	USD
CY2018Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	1028000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	6385000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	4962000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-4000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	3551000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1551000	USD
CY2017Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	8031000	USD
CY2018Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	16159000	USD
CY2017Q4	us-gaap	Other Sundry Liabilities Current OtherSundryLiabilitiesCurrent	282606000	USD
CY2018Q4	us-gaap	Other Sundry Liabilities Current OtherSundryLiabilitiesCurrent	330022000	USD
CY2017Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	31465000	USD
CY2018Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	308002000	USD
CY2016	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	0	USD
CY2017	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	10045000	USD
CY2018	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	121520000	USD
CY2016	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	2734000	USD
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	14098000	USD
CY2016	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2017	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	3077000	USD
CY2017Q4	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	300000	USD
CY2018Q2	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	200000	USD
CY2016	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	847000	USD
CY2017	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	280000	USD
CY2018	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	204000	USD
CY2016	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1948000	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	5763000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	6466000	USD
CY2016	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	74845000	USD
CY2017	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	120816000	USD
CY2018	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	165784000	USD
CY2016	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	454360000	USD
CY2017	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	872958000	USD
CY2018	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1504659000	USD
CY2016	us-gaap	Payments To Explore And Develop Oil And Gas Properties PaymentsToExploreAndDevelopOilAndGasProperties	379067000	USD
CY2017	us-gaap	Payments To Explore And Develop Oil And Gas Properties PaymentsToExploreAndDevelopOilAndGasProperties	699445000	USD
CY2018	us-gaap	Payments To Explore And Develop Oil And Gas Properties PaymentsToExploreAndDevelopOilAndGasProperties	1357802000	USD
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	2000000	shares
CY2017Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	6287000	USD
CY2018Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	8057000	USD
CY2016	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	288510000	USD
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	208720000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	226612000	USD
CY2016	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
CY2017	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	220000000	USD
CY2016Q4	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	181500000	USD
CY2016	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	120000000	USD
CY2017	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	0	USD
CY2018	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	410000000	USD
CY2016	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	0	USD
CY2017	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	44100000	USD
CY2018	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	85750000	USD
CY2016	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	0	USD
CY2017	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-2653000	USD
CY2018	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	0	USD
CY2016	us-gaap	Proceeds From Sales Of Assets Investing Activities ProceedsFromSalesOfAssetsInvestingActivities	5173000	USD
CY2017	us-gaap	Proceeds From Sales Of Assets Investing Activities ProceedsFromSalesOfAssetsInvestingActivities	977000	USD
CY2018	us-gaap	Proceeds From Sales Of Assets Investing Activities ProceedsFromSalesOfAssetsInvestingActivities	8333000	USD
CY2016	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	100000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	2920000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	815000	USD
CY2016	us-gaap	Profit Loss ProfitLoss	-97057000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	138007000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	299764000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1881456000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3122864000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net Excluding Capital Leased Assets PropertyPlantAndEquipmentNetExcludingCapitalLeasedAssets	260459000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net Excluding Capital Leased Assets PropertyPlantAndEquipmentNetExcludingCapitalLeasedAssets	416127000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	281096000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	450066000	USD
CY2016	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	120000000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	370000000	USD
CY2018	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	45000000	USD
CY2016	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	0	USD
CY2017	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	0	USD
CY2018	us-gaap	Repayments Of Unsecured Debt RepaymentsOfUnsecuredDebt	605780000	USD
CY2016Q4	us-gaap	Restricted Cash RestrictedCash	1258000	USD
CY2017Q4	us-gaap	Restricted Cash RestrictedCash	5977000	USD
CY2018Q4	us-gaap	Restricted Cash RestrictedCash	19439000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-510484000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-236277000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	829691000	USD
CY2016	us-gaap	Revenues Revenues	264422000	USD
CY2017	us-gaap	Revenues Revenues	544276000	USD
CY2018	us-gaap	Revenues Revenues	899599000	USD
CY2016Q1	us-gaap	Sale Of Stock Consideration Received On Transaction SaleOfStockConsiderationReceivedOnTransaction	141500000	USD
CY2016Q4	us-gaap	Sale Of Stock Consideration Received On Transaction SaleOfStockConsiderationReceivedOnTransaction	145800000	USD
CY2017Q4	us-gaap	Secured Long Term Debt SecuredLongTermDebt	0	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	12362000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	16654000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	17200000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	8700000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	15.53
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	1600000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	13200000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	7000000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	1000	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	18000	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	26.33
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	563000	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	5.65
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	10.49
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	12.64
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	800000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3064000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3225000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	21.14
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	23.48
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	13.84
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	26.86
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	29.68
CY2018Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	400000	USD
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y10M16D
CY2016	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	3000000	USD
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	2100000	USD
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	11800000	USD
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	383000	shares
CY2016	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	0	USD
CY2017	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	0	USD
CY2018	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	0	USD
CY2016	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	288510000	USD
CY2017	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	208720000	USD
CY2018	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	226612000	USD
CY2016	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	USD
CY2017	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	1658000	USD
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	4384000	USD
CY2016	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	10000	USD
CY2017	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	-1184000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	-1267000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	1156556000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1688880000	USD
CY2015Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	488959000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	691445000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1257546000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1779657000	USD
CY2016	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	0	USD
CY2017	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	0	USD
CY2018	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	0	USD
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	3437	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	20913	shares
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	69000	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	415000	USD
CY2016	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-41238000	USD
CY2017	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	9715000	USD
CY2018	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	65085000	USD
CY2017Q4	us-gaap	Unsecured Long Term Debt UnsecuredLongTermDebt	574073000	USD
CY2018Q4	us-gaap	Unsecured Long Term Debt UnsecuredLongTermDebt	1037837000	USD
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	91273000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	102543000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	113691000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	91273000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	102029000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	113580000	shares
CY2018	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:8pt;"></font><font style="font-family:inherit;font-size:10pt;font-style:italic;text-decoration:underline;">Credit Risk</font></div><div style="line-height:120%;padding-top:8px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company’s cash is held in financial institutions and at times these amounts exceed the insurance limits of the Federal Deposit Insurance Corporation. Management believes, however, that the Company’s counterparty risks are minimal based on the reputation and history of the institutions selected.</font></div><div style="line-height:120%;padding-top:8px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company uses derivative financial instruments to mitigate its exposure to oil, natural gas and NGL price volatility. These transactions expose the Company to potential credit risk from its counterparties. The Company manages counterparty credit risk through established internal derivatives policies that are reviewed on an ongoing basis. Additionally, all of the Company’s commodity derivative contracts at </font><font style="font-family:inherit;font-size:10pt;">December 31, 2018</font><font style="font-family:inherit;font-size:10pt;"> were with The Bank of Nova Scotia and SunTrust Bank (or affiliates thereof), parties that are lenders (or affiliates thereof) under the Company’s revolving credit agreement.</font></div><div style="line-height:120%;padding-top:8px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Accounts receivable constitute the principal component of additional credit risk to which the Company may be exposed. The Company attempts to minimize credit risk exposure to counterparties by monitoring the financial condition and payment history of its purchasers and joint interest partners.</font></div><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;text-decoration:underline;"></font></div></div>
CY2018	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:8px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Matador Resources Company, a Texas corporation (“Matador” and, collectively with its subsidiaries, the “Company”), is an independent energy company engaged in the exploration, development, production and acquisition of oil and natural gas resources in the United States, with an emphasis on oil and natural gas shale and other unconventional plays. The Company’s current operations are focused primarily on the oil and liquids-rich portion of the Wolfcamp and Bone Spring plays in the Delaware Basin in Southeast New Mexico and West Texas. The Company also operates in the Eagle Ford shale play in South Texas and the Haynesville shale and Cotton Valley plays in Northwest Louisiana and East Texas. Additionally, the Company conducts midstream operations, primarily through its midstream joint venture, San Mateo Midstream, LLC (“San Mateo” or the “Joint Venture”), in support of the Company’s exploration, development and production operations and provides natural gas processing, oil transportation services, oil, natural gas and salt water gathering services and salt water disposal services to third parties.</font></div></div>
CY2018	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:8px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;text-decoration:underline;">Use of Estimates</font></div><div style="line-height:120%;padding-top:8px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. These estimates and assumptions may also affect disclosure of contingent assets and liabilities at the date of the financial statements, purchase price allocations and the reported amounts of revenues and expenses during the reporting period. While the Company believes its estimates are reasonable, changes in facts and assumptions or the discovery of new information may result in revised estimates. Actual results could differ from these estimates.</font></div><div style="line-height:120%;padding-top:8px;text-indent:32px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company’s consolidated financial statements are based on a number of significant estimates, including oil and natural gas revenues, accrued assets and liabilities, stock-based compensation, valuation of derivative instruments, deferred tax assets and liabilities, purchase price allocations and oil and natural gas reserves. The estimates of oil and natural gas reserves quantities and future net cash flows are the basis for the calculations of depletion and impairment of oil and natural gas properties, as well as estimates of asset retirement obligations and certain tax accruals. The Company’s oil and natural gas reserves estimates, which are inherently imprecise and based upon many factors that are beyond the Company’s control, including oil and natural gas prices, are prepared by the Company’s engineering staff in accordance with guidelines established by the Securities and Exchange Commission (“SEC”) and then audited for their reasonableness and conformance with SEC guidelines by Netherland, Sewell & Associates, Inc., independent reservoir engineers.</font></div></div>

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Matador Resources Co Stock $mtdr

2017 Q4 Form 10-K Financial Statement

#000152000619000048 Filed on March 01, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MTDR Matador Resources Co Stock $mtdr

2017 Q4 Form 10-K Financial Statement

#000152000619000048 Filed on March 01, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MTDR
Matador Resources Co Stock $mtdr