$MTDR
Matador Resources Co Stock $mtdr

$mtdr Overview Financials Valuation SEC Filings Company Website

2017 Form 10-K Financial Statement

#000152000618000053 Filed on March 01, 2018

Income Statement

Concept	2017	2016 Q4	2016
Revenue	$544.3M	$85.00M	$264.4M
YoY Change	105.84%	25.55%	-16.86%
Cost Of Revenue	$138.6M	$29.00M	$104.6M
YoY Change	32.5%	19.83%	11.51%
Gross Profit	$405.6M	$56.00M	$159.8M
YoY Change	153.82%	28.74%	-28.72%
Gross Profit Margin	74.52%	65.88%	60.43%
Selling, General & Admin	$66.00M	$15.60M	$55.10M
YoY Change	19.78%	34.48%	9.98%
% of Gross Profit	16.27%	27.86%	34.48%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$177.5M	$31.80M	$122.0M
YoY Change	45.44%	-9.92%	-31.76%
% of Gross Profit	43.76%	56.79%	76.38%
Operating Expenses	$244.8M	$47.80M	$178.4M
YoY Change	37.22%	1.27%	-22.33%
Operating Profit	$160.8M	$8.200M	-$177.2M
YoY Change	-190.78%	-321.62%	-78.04%
Interest Expense	$34.57M	-$8.000M	$28.20M
YoY Change	22.58%	21.21%	29.63%
% of Operating Profit	21.49%	-97.56%
Other Income/Expense, Net	-$30.99M	$0.00	$79.07M
YoY Change	-139.19%		-490.87%
Pretax Income	$129.9M	$104.4M	-$98.09M
YoY Change	-232.37%	-145.67%	-88.14%
Income Tax	-$8.157M	$100.0K	-$1.036M
% Of Pretax Income	-6.28%	0.1%
Net Earnings	$125.9M	$104.2M	-$97.42M
YoY Change	-229.2%	-145.23%	-85.66%
Net Earnings / Revenue	23.13%	122.59%	-36.84%
Basic Earnings Per Share	$1.23		-$1.07
Diluted Earnings Per Share	$1.23	$1.097M	-$1.07
COMMON SHARES
Basic Shares Outstanding	102.0M shares	93.47M shares	91.27M shares
Diluted Shares Outstanding	102.5M shares		91.27M shares

Balance Sheet

Concept	2017	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		$212.9M
Short-Term Investments
Other Short-Term Assets	$13.50M	$279.2M	$4.600M
YoY Change	193.48%	337.59%	-92.79%
Inventory	$6.000M	$3.000M	$3.000M
Prepaid Expenses
Receivables	$133.2M	$34.15M	$53.50M
Other Receivables	$8.000M	$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	$1.882B	$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	$7.100M	$958.0K	$1.000M
YoY Change	610.0%	-33.84%	-28.57%
Total Long-Term Assets	$1.888B	$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	$1.888B	$1.185B	$1.186B
Total Assets	$2.146B	$1.465B	$1.465B
YoY Change	46.49%	28.38%	28.38%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$14.50M	$4.674M	$6.400M
YoY Change	126.56%	-57.38%	-45.3%
Accrued Expenses	$174.3M	$101.5M	$101.5M
YoY Change	71.72%	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	66.73%	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	$31.50M	$7.544M	$29.80M
YoY Change	5.7%	244.47%	-75.93%
Total Long-Term Liabilities	$605.6M	$603.7M	$603.7M
YoY Change	0.31%	17.21%	17.2%
TOTAL LIABILITIES
Total Short-Term Liabilities	$282.6M	$169.5M	$169.5M
Total Long-Term Liabilities	$605.6M	$603.7M	$603.7M
Total Liabilities	$989.1M	$773.2M	$774.5M
YoY Change	27.71%	18.61%	18.62%
SHAREHOLDERS EQUITY
Retained Earnings		-$636.4M
YoY Change		18.08%
Common Stock		$995.0K
YoY Change		16.24%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$0.00
YoY Change
Treasury Stock 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	46.49%	28.38%	28.38%

Cashflow Statement

Concept	2017	2016 Q4	2016
OPERATING ACTIVITIES
Net Income	$125.9M	$104.2M	-$97.42M
YoY Change	-229.2%	-145.23%	-85.66%
Depreciation, Depletion And Amortization	$177.5M	$31.80M	$122.0M
YoY Change	45.44%	-9.92%	-31.76%
Cash From Operating Activities	$299.1M	$37.60M	$134.1M
YoY Change	123.08%	66.37%	-35.7%
INVESTING ACTIVITIES
Capital Expenditures	-$820.3M	-$108.6M	-$453.9M
YoY Change	80.72%	-5.97%	-8.71%
Acquisitions	$0.00		$0.00
YoY Change			-100.0%
Other Investing Activities	-$3.700M	-$42.50M	$5.200M
YoY Change	-171.15%	-144.27%	-92.79%
Cash From Investing Activities	-$819.3M	-$151.1M	-$448.7M
YoY Change	82.57%	670.92%	5.55%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$208.7M		$288.5M
YoY Change	-27.66%		52.88%
Debt Paid & Issued, Net	$0.00		$120.0M
YoY Change	-100.0%		-74.84%
Cash From Financing Activities	$408.5M	262.7M	$467.7M
YoY Change	-12.66%	-131450.0%	107.92%
NET CHANGE
Cash From Operating Activities	$299.1M	37.60M	$134.1M
Cash From Investing Activities	-$819.3M	-151.1M	-$448.7M
Cash From Financing Activities	$408.5M	262.7M	$467.7M
Net Change In Cash	-$111.7M	149.2M	$153.1M
YoY Change	-172.96%	5228.57%	1738.47%
FREE CASH FLOW
Cash From Operating Activities	$299.1M	$37.60M	$134.1M
Capital Expenditures	-$820.3M	-$108.6M	-$453.9M
Free Cash Flow	$1.119B	$146.2M	$588.0M
YoY Change	90.38%	5.87%	-16.68%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2017	dei	Amendment Flag AmendmentFlag	false
CY2017	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2017	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2017	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	dei	Document Type DocumentType	10-K
CY2017	dei	Entity Central Index Key EntityCentralIndexKey	0001520006
CY2018Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	109248747	shares
CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2017	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2017Q2	dei	Entity Public Float EntityPublicFloat	1910451565	USD
CY2017	dei	Entity Registrant Name EntityRegistrantName	Matador Resources Co
CY2017	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2017	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2016Q4	mtdr	Accumulated Depreciation And Amortization Of Other Property And Equipment AccumulatedDepreciationAndAmortizationOfOtherPropertyAndEquipment	13429000	USD
CY2017Q4	mtdr	Accumulated Depreciation And Amortization Of Other Property And Equipment AccumulatedDepreciationAndAmortizationOfOtherPropertyAndEquipment	20637000	USD
CY2017	mtdr	Adjustmentsto Additional Paidin Capital Formationof Joint Venture AdjustmentstoAdditionalPaidinCapitalFormationofJointVenture	171500000	USD
CY2016Q4	mtdr	Advances From Joint Interest Owners For Costs Incurred On Joint Interest Wells AdvancesFromJointInterestOwnersForCostsIncurredOnJointInterestWells	1700000	USD
CY2017Q4	mtdr	Advances From Joint Interest Owners For Costs Incurred On Joint Interest Wells AdvancesFromJointInterestOwnersForCostsIncurredOnJointInterestWells	2789000	USD
CY2017	mtdr	Billing Date BillingDate	P30D
CY2015	mtdr	Capital Contributedto Corporate Joint Ventures CapitalContributedtoCorporateJointVentures	0	USD
CY2016	mtdr	Capital Contributedto Corporate Joint Ventures CapitalContributedtoCorporateJointVentures	0	USD
CY2017	mtdr	Capital Contributedto Corporate Joint Ventures CapitalContributedtoCorporateJointVentures	171500000	USD
CY2015	mtdr	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	6900000	USD
CY2016	mtdr	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	15700000	USD
CY2017	mtdr	Capitalized General And Administrative Costs CapitalizedGeneralAndAdministrativeCosts	23100000	USD
CY2015Q4	mtdr	Carrying Valueofthe Assets Soldinthe Saleand Leaseback Transaction CarryingValueoftheAssetsSoldintheSaleandLeasebackTransaction	31000000	USD
CY2015	mtdr	Common Stock And Restricted Stock Expense CommonStockAndRestrictedStockExpense	900000	USD
CY2016	mtdr	Common Stock And Restricted Stock Expense CommonStockAndRestrictedStockExpense	1000000	USD
CY2017	mtdr	Common Stock And Restricted Stock Expense CommonStockAndRestrictedStockExpense	3000000	USD
CY2017	mtdr	Cost Incurred On Proved Reserves Transferred To Amortization Base CostIncurredOnProvedReservesTransferredToAmortizationBase	29900000	USD
CY2016Q4	mtdr	Deferred Tax Asset Noncurrent Attributableto Percentage Depletion Carryover DeferredTaxAssetNoncurrentAttributabletoPercentageDepletionCarryover	2595000	USD
CY2017Q4	mtdr	Deferred Tax Asset Noncurrent Attributableto Percentage Depletion Carryover DeferredTaxAssetNoncurrentAttributabletoPercentageDepletionCarryover	1582000	USD
CY2016Q4	mtdr	Deferred Tax Assets Basis Increase Relatedtothe San Mateo Transaction DeferredTaxAssetsBasisIncreaseRelatedtotheSanMateoTransaction	0	USD
CY2017Q4	mtdr	Deferred Tax Assets Basis Increase Relatedtothe San Mateo Transaction DeferredTaxAssetsBasisIncreaseRelatedtotheSanMateoTransaction	18382000	USD
CY2016Q4	mtdr	Deferred Tax Assets Derivative Noncurrent DeferredTaxAssetsDerivativeNoncurrent	8734000	USD
CY2017Q4	mtdr	Deferred Tax Assets Derivative Noncurrent DeferredTaxAssetsDerivativeNoncurrent	3200000	USD
CY2016Q4	mtdr	Deferred Tax Assets Liabilities Netof Valuation Allowance Noncurrent DeferredTaxAssetsLiabilitiesNetofValuationAllowanceNoncurrent	0	USD
CY2017Q4	mtdr	Deferred Tax Assets Liabilities Netof Valuation Allowance Noncurrent DeferredTaxAssetsLiabilitiesNetofValuationAllowanceNoncurrent	0	USD
CY2016Q4	mtdr	Deferred Tax Assets Operating Loss Carryforwards Noncurrent DeferredTaxAssetsOperatingLossCarryforwardsNoncurrent	137757000	USD
CY2017Q4	mtdr	Deferred Tax Assets Operating Loss Carryforwards Noncurrent DeferredTaxAssetsOperatingLossCarryforwardsNoncurrent	118134000	USD
CY2016Q4	mtdr	Deferred Tax Liabilities Other Noncurrent DeferredTaxLiabilitiesOtherNoncurrent	11855000	USD
CY2017Q4	mtdr	Deferred Tax Liabilities Other Noncurrent DeferredTaxLiabilitiesOtherNoncurrent	11248000	USD
CY2015	mtdr	Defined Contribution Plan Employer Additional Discretionary Contribution Amount DefinedContributionPlanEmployerAdditionalDiscretionaryContributionAmount	0	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
CY2015	mtdr	Defined Contribution Plan Employer Matching Contribution Amount DefinedContributionPlanEmployerMatchingContributionAmount	600000	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
CY2017	mtdr	Discounting Rate Present Value Of Future Revenue From Proved Oil And Gas Reserves DiscountingRatePresentValueOfFutureRevenueFromProvedOilAndGasReserves	0.1
CY2016Q4	mtdr	Dueto Joint Ventures Current DuetoJointVenturesCurrent	4251000	USD
CY2017Q4	mtdr	Dueto Joint Ventures Current DuetoJointVenturesCurrent	4873000	USD
CY2016Q4	mtdr	Dueto Joint Ventures Non Current DuetoJointVenturesNonCurrent	1771000	USD
CY2017Q4	mtdr	Dueto Joint Ventures Non Current DuetoJointVenturesNonCurrent	0	USD
CY2015	mtdr	Effective Income Tax Rate Reconciliation Changein State Deferred Tax Assets Valuation Allowance Amount EffectiveIncomeTaxRateReconciliationChangeinStateDeferredTaxAssetsValuationAllowanceAmount	8413000	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
CY2015	mtdr	Effective Income Tax Reconciliation Refundable Credit EffectiveIncomeTaxReconciliationRefundableCredit	0	USD
CY2016	mtdr	Effective Income Tax Reconciliation Refundable Credit EffectiveIncomeTaxReconciliationRefundableCredit	0	USD
CY2017	mtdr	Effective Income Tax Reconciliation Refundable Credit EffectiveIncomeTaxReconciliationRefundableCredit	8178000	USD
CY2015	mtdr	Income Tax Reconciliation Income Federal Alternative Minimum Tax IncomeTaxReconciliationIncomeFederalAlternativeMinimumTax	-2588000	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
CY2015	mtdr	Income Tax Reconciliation Permanent Differences IncomeTaxReconciliationPermanentDifferences	698000	USD
CY2016	mtdr	Income Tax Reconciliation Permanent Differences IncomeTaxReconciliationPermanentDifferences	-499000	USD
CY2017	mtdr	Income Tax Reconciliation Permanent Differences IncomeTaxReconciliationPermanentDifferences	-4740000	USD
CY2015	mtdr	Increase Decrease In Liabilities For Support Equipment And Facilities IncreaseDecreaseInLiabilitiesForSupportEquipmentAndFacilities	12076000	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
CY2015	mtdr	Increase Decrease In Payments Made In Advance By Joint Interest Partners In Oil And Gas Properties IncreaseDecreaseInPaymentsMadeInAdvanceByJointInterestPartnersInOilAndGasProperties	-700000	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
CY2015	mtdr	Increase Decreasein Asset Retirement Obligations Mineral Properties IncreaseDecreaseinAssetRetirementObligationsMineralProperties	2510000	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
CY2015	mtdr	Increase Decreasein Asset Retirement Obligations Support Equipmentand Facilities IncreaseDecreaseinAssetRetirementObligationsSupportEquipmentandFacilities	383000	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
CY2015	mtdr	Increase Decreasein Liabilitiesfor Accrued Costto Issue Equity IncreaseDecreaseinLiabilitiesforAccruedCosttoIssueEquity	0	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
CY2015	mtdr	Increase Decreasein Liabilitiesfor Oiland Natural Gas Properties Capital Expenditures IncreaseDecreaseinLiabilitiesforOilandNaturalGasPropertiesCapitalExpenditures	-30683000	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
CY2015	mtdr	Increase Decreasein Restricted Cashlessthanwhollyownedsubsidiaries IncreaseDecreaseinRestrictedCashlessthanwhollyownedsubsidiaries	650000	USD
CY2016	mtdr	Increase Decreasein Restricted Cashlessthanwhollyownedsubsidiaries IncreaseDecreaseinRestrictedCashlessthanwhollyownedsubsidiaries	-1000	USD
CY2017	mtdr	Increase Decreasein Restricted Cashlessthanwhollyownedsubsidiaries IncreaseDecreaseinRestrictedCashlessthanwhollyownedsubsidiaries	4719000	USD
CY2015	mtdr	Interestand Other Income Expense InterestandOtherIncomeExpense	616000	USD
CY2016	mtdr	Interestand Other Income Expense InterestandOtherIncomeExpense	-4000	USD
CY2017	mtdr	Interestand Other Income Expense InterestandOtherIncomeExpense	3551000	USD
CY2015	mtdr	Issuance Of Restricted Stock Units For Board And Advisor Services IssuanceOfRestrictedStockUnitsForBoardAndAdvisorServices	584000	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
CY2015	mtdr	Lease And Well Equipment Inventories LeaseAndWellEquipmentInventories	180000	USD
CY2016	mtdr	Lease And Well Equipment Inventories LeaseAndWellEquipmentInventories	700000	USD
CY2017	mtdr	Lease And Well Equipment Inventories LeaseAndWellEquipmentInventories	3623000	USD
CY2017Q4	mtdr	Minimum Outstanding Aggregate Commitments MinimumOutstandingAggregateCommitments	24800000	USD
CY2017	mtdr	Minimum Percentage Likelihood Of Tax Benefit To Be Realized Upon Final Settlement MinimumPercentageLikelihoodOfTaxBenefitToBeRealizedUponFinalSettlement	0.50
CY2017Q4	mtdr	Net Acres NetAcres	6600	acre
CY2015	mtdr	Netgainlossonassetsalesandinventoryimpairment Netgainlossonassetsalesandinventoryimpairment	-908000	USD
CY2016	mtdr	Netgainlossonassetsalesandinventoryimpairment Netgainlossonassetsalesandinventoryimpairment	-107277000	USD
CY2017	mtdr	Netgainlossonassetsalesandinventoryimpairment Netgainlossonassetsalesandinventoryimpairment	-23000	USD
CY2015	mtdr	Number Of Purchasers NumberOfPurchasers	3	Purchasers
CY2016	mtdr	Number Of Purchasers NumberOfPurchasers	3	Purchasers
CY2017	mtdr	Number Of Purchasers NumberOfPurchasers	4	Purchasers
CY2016Q4	mtdr	Oil And Gas Property Full Cost Method Including Unproved And Unevaluated Gross OilAndGasPropertyFullCostMethodIncludingUnprovedAndUnevaluatedGross	2888041000	USD
CY2017Q4	mtdr	Oil And Gas Property Full Cost Method Including Unproved And Unevaluated Gross OilAndGasPropertyFullCostMethodIncludingUnprovedAndUnevaluatedGross	3642166000	USD
CY2017	mtdr	Oiland Gas Deficiency Fees OilandGasDeficiencyFees	0	USD
CY2017	mtdr	Past Due Days Of Account Receivable Considered Delinquent PastDueDaysOfAccountReceivableConsideredDelinquent	P60D
CY2016Q4	mtdr	Payables Intercompany PayablesIntercompany	0	USD
CY2017Q4	mtdr	Payables Intercompany PayablesIntercompany	0	USD
CY2015	mtdr	Proceedsfrom Capital Commitmentsfrom Noncontrolling Interest ProceedsfromCapitalCommitmentsfromNoncontrollingInterest	562000	USD
CY2016	mtdr	Proceedsfrom Capital Commitmentsfrom Noncontrolling Interest ProceedsfromCapitalCommitmentsfromNoncontrollingInterest	0	USD
CY2017	mtdr	Proceedsfrom Capital Commitmentsfrom Noncontrolling Interest ProceedsfromCapitalCommitmentsfromNoncontrollingInterest	0	USD
CY2015	mtdr	Production Taxes And Marketing ProductionTaxesAndMarketing	35650000	USD
CY2016	mtdr	Production Taxes And Marketing ProductionTaxesAndMarketing	43046000	USD
CY2017	mtdr	Production Taxes And Marketing ProductionTaxesAndMarketing	58275000	USD
CY2015Q2	mtdr	Public Offering Underwriting Discounts Commissionsand Direct Offering Costs PublicOfferingUnderwritingDiscountsCommissionsandDirectOfferingCosts	1200000	USD
CY2016Q4	mtdr	Receivables Intercompany ReceivablesIntercompany	0	USD
CY2017Q4	mtdr	Receivables Intercompany ReceivablesIntercompany	0	USD
CY2017	mtdr	Repay Deficit In Agreement Period RepayDeficitInAgreementPeriod	P6M
CY2017Q4	mtdr	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingAggregateIntrinsicValue	36400000	USD
CY2015	mtdr	Stock Based Compensation Expense Recognized As Liability StockBasedCompensationExpenseRecognizedAsLiability	79000	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
CY2015	mtdr	Stock Issued During Period Value Stock Options Settled StockIssuedDuringPeriodValueStockOptionsSettled	446000	USD
CY2016	mtdr	Stock Issued During Period Value Stock Options Settled StockIssuedDuringPeriodValueStockOptionsSettled	255000	USD
CY2015	mtdr	Swing Sale Profit SwingSaleProfit	400000000	USD
CY2016	mtdr	Swing Sale Profit SwingSaleProfit	184625000	USD
CY2017	mtdr	Swing Sale Profit SwingSaleProfit	0	USD
CY2017	mtdr	Tax Cutsand Jobs Actof2017 Incomplete Accounting Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit	51500000	USD
CY2015	mtdr	Transfer Of Inventory From Oil And Natural Gas Properties TransferOfInventoryFromOilAndNaturalGasProperties	615000	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
CY2015	mtdr	Transferofinventorytootherpropertyandequipment Transferofinventorytootherpropertyandequipment	0	USD
CY2016	mtdr	Transferofinventorytootherpropertyandequipment Transferofinventorytootherpropertyandequipment	0	USD
CY2017	mtdr	Transferofinventorytootherpropertyandequipment Transferofinventorytootherpropertyandequipment	-317000	USD
CY2017Q4	mtdr	Unamortized Deferred Finance Costs UnamortizedDeferredFinanceCosts	1000000	USD
CY2016Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	4674000	USD
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	11757000	USD
CY2016Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	34154000	USD
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	65962000	USD
CY2016	us-gaap	Accretion Expense AccretionExpense	1182000	USD
CY2017	us-gaap	Accretion Expense AccretionExpense	1290000	USD
CY2016Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	101460000	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	174348000	USD
CY2016Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	23988000	USD
CY2017Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	61358000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1864311000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2041806000	USD
CY2017Q4	us-gaap	Acquisition Costs AcquisitionCosts	38000000	USD
CY2016Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1325481000	USD
CY2017Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1666024000	USD
CY2015	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	9333000	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
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
CY2015	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	1151000	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
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	16700000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	0	USD
CY2015	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	852000	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
CY2015Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	15420000	USD
CY2016Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	20640000	USD
CY2017Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	26256000	USD
CY2015	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	734000	USD
CY2016	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1182000	USD
CY2017	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1290000	USD
CY2016Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	915000	USD
CY2017Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	1176000	USD
CY2016	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	1791000	USD
CY2017	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	2920000	USD
CY2016	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	375000	USD
CY2017	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	430000	USD
CY2016	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	2622000	USD
CY2017	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	1836000	USD
CY2016Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	19725000	USD
CY2017Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	25080000	USD
CY2015Q4	us-gaap	Assets Assets	1140861000	USD
CY2016Q4	us-gaap	Assets Assets	1464665000	USD
CY2017Q4	us-gaap	Assets Assets	2145690000	USD
CY2016Q4	us-gaap	Assets Current AssetsCurrent	279182000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	257170000	USD
CY2015	us-gaap	Average Sales Prices AverageSalesPrices	46.79
CY2015	us-gaap	Average Sales Prices AverageSalesPrices	2.59
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
CY2016Q4	us-gaap	Capitalized Costs Unproved Properties CapitalizedCostsUnprovedProperties	479736000	USD
CY2017Q4	us-gaap	Capitalized Costs Unproved Properties CapitalizedCostsUnprovedProperties	637396000	USD
CY2017Q4	us-gaap	Capitalized Costs Wells And Related Equipment And Facilities CapitalizedCostsWellsAndRelatedEquipmentAndFacilities	29900000	USD
CY2016Q4	us-gaap	Cash Cash	212884000	USD
CY2017Q4	us-gaap	Cash Cash	96505000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	8407000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	16732000	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
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	8325000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	196152000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-116379000	USD
CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	120000000	shares
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	160000000	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	99518764	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	108513597	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	99511931	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	108510160	shares
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	995000	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	1085000	USD
CY2015	us-gaap	Costs And Expenses CostsAndExpenses	1124695000	USD
CY2016	us-gaap	Costs And Expenses CostsAndExpenses	441589000	USD
CY2017	us-gaap	Costs And Expenses CostsAndExpenses	383435000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	2588000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-1144000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-8178000	USD
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2959000	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
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	371000	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
CY2015Q2	us-gaap	Debt Instrument Basis Spread On Variable Rate1 DebtInstrumentBasisSpreadOnVariableRate1	0.5
CY2016Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	573924000	USD
CY2017Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	574073000	USD
CY2015Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	0	USD
CY2016Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	1400000	USD
CY2017Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	400000	USD
CY2015Q4	us-gaap	Deferred Compensation Liability Current DeferredCompensationLiabilityCurrent	1000000	USD
CY2016Q4	us-gaap	Deferred Compensation Liability Current DeferredCompensationLiabilityCurrent	0	USD
CY2017Q4	us-gaap	Deferred Compensation Liability Current DeferredCompensationLiabilityCurrent	0	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-150327000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-13215000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	539000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	368000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Gross Noncurrent DeferredTaxAssetsGrossNoncurrent	202110000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross Noncurrent DeferredTaxAssetsGrossNoncurrent	141298000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	11855000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	51816000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	44391000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	0	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	8633000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	0	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance Noncurrent DeferredTaxAssetsValuationAllowanceNoncurrent	190255000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance Noncurrent DeferredTaxAssetsValuationAllowanceNoncurrent	89482000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Gross Noncurrent DeferredTaxLiabilitiesGrossNoncurrent	11855000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Gross Noncurrent DeferredTaxLiabilitiesGrossNoncurrent	51816000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	0	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	40568000	USD
CY2015	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	800000	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
CY2017	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.03
CY2015	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	178847000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	122048000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	177502000	USD
CY2016Q4	us-gaap	Derivative Assets DerivativeAssets	0	USD
CY2017Q4	us-gaap	Derivative Assets DerivativeAssets	0	USD
CY2016Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	0	USD
CY2017Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	1190000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-15239000	USD
CY2016Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	24954000	USD
CY2017Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	15239000	USD
CY2016Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	24203000	USD
CY2017Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	16429000	USD
CY2016Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	751000	USD
CY2017Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	0	USD
CY2016Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	8651000	USD
CY2017Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	10302000	USD
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-8.34
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.07
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.23
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-8.34
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.07
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.23
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2017	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	3300000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P9M12D
CY2017Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	9800000	USD
CY2015	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	3400000	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
CY2015	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	300000	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
CY2017Q4	us-gaap	Equity Method Investment Ownership Percentage EquityMethodInvestmentOwnershipPercentage	1.0
CY2015	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	77094000	USD
CY2016	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	9286000	USD
CY2017	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	-4321000	USD
CY2015	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	908000	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
CY2015	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	50105000	USD
CY2016	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	55089000	USD
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	66016000	USD
CY2015	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	801200000	USD
CY2015	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	801166000	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
CY2015	us-gaap	Income Loss Attributable To Noncontrolling Interest IncomeLossAttributableToNoncontrollingInterest	261000	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
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-826892000	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
CY2015	us-gaap	Income Loss From Subsidiaries Before Tax IncomeLossFromSubsidiariesBeforeTax	0	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
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-147368000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1036000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-8157000	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	145777000	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
CY2015	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	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
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-289412000	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
CY2015	us-gaap	Income Taxes Paid IncomeTaxesPaid	506000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	2895000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	USD
CY2015	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-3633000	USD
CY2016	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	14259000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	82549000	USD
CY2015	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	2405000	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
CY2015	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	1375000	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
CY2015	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	489000	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
CY2015	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	552000	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
CY2015	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	544000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	124000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	2960000	USD
CY2015	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	43098000	USD
CY2016	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-43098000	USD
CY2017	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	0	USD
CY2015	us-gaap	Increase Decrease In Royalties Payable IncreaseDecreaseInRoyaltiesPayable	1654000	USD
CY2016	us-gaap	Increase Decrease In Royalties Payable IncreaseDecreaseInRoyaltiesPayable	7495000	USD
CY2017	us-gaap	Increase Decrease In Royalties Payable IncreaseDecreaseInRoyaltiesPayable	37370000	USD
CY2015	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
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
CY2015	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	3900000	USD
CY2016	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	3700000	USD
CY2017	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	7300000	USD
CY2015	us-gaap	Interest Expense InterestExpense	21754000	USD
CY2016	us-gaap	Interest Expense InterestExpense	28199000	USD
CY2017	us-gaap	Interest Expense InterestExpense	34565000	USD
CY2015	us-gaap	Interest Paid Net InterestPaidNet	16154000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	27464000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	32760000	USD
CY2016Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	0	USD
CY2017Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	0	USD
CY2015	us-gaap	Lease Operating Expense LeaseOperatingExpense	54704000	USD
CY2016	us-gaap	Lease Operating Expense LeaseOperatingExpense	56202000	USD
CY2017	us-gaap	Lease Operating Expense LeaseOperatingExpense	67313000	USD
CY2017	us-gaap	Lessee Leasing Arrangements Operating Leases Term Of Contract LesseeLeasingArrangementsOperatingLeasesTermOfContract	P5Y
CY2017Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	2100000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1464665000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2145690000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	169505000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	282606000	USD
CY2016Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	603715000	USD
CY2017Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	605538000	USD
CY2017Q4	us-gaap	Long Term Line Of Credit LongTermLineOfCredit	0	USD
CY2016Q4	us-gaap	Minority Interest MinorityInterest	1320000	USD
CY2017Q4	us-gaap	Minority Interest MinorityInterest	100990000	USD
CY2017	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	10045000	USD
CY2017	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	2653000	USD
CY2015	us-gaap	Natural Gas Midstream Costs NaturalGasMidstreamCosts	3489000	USD
CY2016	us-gaap	Natural Gas Midstream Costs NaturalGasMidstreamCosts	5389000	USD
CY2017	us-gaap	Natural Gas Midstream Costs NaturalGasMidstreamCosts	13039000	USD
CY2015	us-gaap	Natural Gas Midstream Revenue NaturalGasMidstreamRevenue	1864000	USD
CY2016	us-gaap	Natural Gas Midstream Revenue NaturalGasMidstreamRevenue	5218000	USD
CY2017	us-gaap	Natural Gas Midstream Revenue NaturalGasMidstreamRevenue	10198000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	224944000	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
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-425154000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-405640000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-824003000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	208535000	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
CY2015	us-gaap	Net Income Loss NetIncomeLoss	-679524000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	-97057000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	138007000	USD
CY2015	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	261000	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
CY2015	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	562000	USD
CY2017	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	44100000	USD
CY2016Q4	us-gaap	Notes Payable Fair Value Disclosure NotesPayableFairValueDisclosure	605200000	USD
CY2017Q4	us-gaap	Notes Payable Fair Value Disclosure NotesPayableFairValueDisclosure	614100000	USD
CY2017	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2016Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	19347000	USD
CY2017Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	67225000	USD
CY2016Q4	us-gaap	Oil And Gas Property Full Cost Method Depletion OilAndGasPropertyFullCostMethodDepletion	1850882000	USD
CY2017Q4	us-gaap	Oil And Gas Property Full Cost Method Depletion OilAndGasPropertyFullCostMethodDepletion	2021169000	USD
CY2016Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	2408305000	USD
CY2017Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	3004770000	USD
CY2016Q4	us-gaap	Oil And Gas Property Full Cost Method Net OilAndGasPropertyFullCostMethodNet	1037159000	USD
CY2017Q4	us-gaap	Oil And Gas Property Full Cost Method Net OilAndGasPropertyFullCostMethodNet	1620997000	USD
CY2015	us-gaap	Oil And Gas Sales Revenue OilAndGasSalesRevenue	278340000	USD
CY2016	us-gaap	Oil And Gas Sales Revenue OilAndGasSalesRevenue	291156000	USD
CY2017	us-gaap	Oil And Gas Sales Revenue OilAndGasSalesRevenue	528684000	USD
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	-806662000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	-177167000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	160841000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	22620000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	2495000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	2774000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	2660000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	2602000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	2528000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	9561000	USD
CY2015	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	1700000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	2900000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	2600000	USD
CY2016Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	3011000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	4418000	USD
CY2016Q4	us-gaap	Other Assets OtherAssets	958000	USD
CY2017Q4	us-gaap	Other Assets OtherAssets	7064000	USD
CY2016Q4	us-gaap	Other Assets Current OtherAssetsCurrent	279182000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	257170000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	958000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	7064000	USD
CY2015	us-gaap	Other Income OtherIncome	616000	USD
CY2016	us-gaap	Other Income OtherIncome	-4000	USD
CY2017	us-gaap	Other Income OtherIncome	3551000	USD
CY2016Q4	us-gaap	Other Inventory Net Of Reserves OtherInventoryNetOfReserves	3045000	USD
CY2017Q4	us-gaap	Other Inventory Net Of Reserves OtherInventoryNetOfReserves	5993000	USD
CY2016Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	578000	USD
CY2017Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	750000	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	7544000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	6385000	USD
CY2015	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-20230000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	79074000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-30991000	USD
CY2016Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	5167000	USD
CY2017Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	8031000	USD
CY2016Q4	us-gaap	Other Sundry Liabilities Current OtherSundryLiabilitiesCurrent	169505000	USD
CY2017Q4	us-gaap	Other Sundry Liabilities Current OtherSundryLiabilitiesCurrent	282606000	USD
CY2016Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	29791000	USD
CY2017Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	31465000	USD
CY2015	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	0	USD
CY2016	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	0	USD
CY2017	us-gaap	Payments Of Capital Distribution PaymentsOfCapitalDistribution	10045000	USD
CY2015	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	9598000	USD
CY2016	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	2734000	USD
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2017Q4	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	300000	USD
CY2015	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	1158000	USD
CY2016	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	847000	USD
CY2017	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	280000	USD
CY2015	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1610000	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
CY2015	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	24028000	USD
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2015	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	64499000	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
CY2015	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	698437000	USD
CY2016	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	454360000	USD
CY2017	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	872958000	USD
CY2015	us-gaap	Payments To Explore And Develop Oil And Gas Properties PaymentsToExploreAndDevelopOilAndGasProperties	432715000	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
CY2016Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	3327000	USD
CY2017Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	6287000	USD
CY2015Q2	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	187600000	USD
CY2015	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	188720000	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
CY2016Q4	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	181500000	USD
CY2015	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	125000000	USD
CY2016	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	120000000	USD
CY2017	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	0	USD
CY2015	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	0	USD
CY2016	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	0	USD
CY2017	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	44100000	USD
CY2015	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	0	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
CY2015	us-gaap	Proceeds From Sales Of Assets Investing Activities ProceedsFromSalesOfAssetsInvestingActivities	139836000	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
CY2015	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	10000	USD
CY2016	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	100000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	2920000	USD
CY2015	us-gaap	Profit Loss ProfitLoss	-679785000	USD
CY2016	us-gaap	Profit Loss ProfitLoss	-97421000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	125867000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1184525000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1881456000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net Excluding Capital Leased Assets PropertyPlantAndEquipmentNetExcludingCapitalLeasedAssets	147366000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net Excluding Capital Leased Assets PropertyPlantAndEquipmentNetExcludingCapitalLeasedAssets	260459000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	160795000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	281096000	USD
CY2015	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	476982000	USD
CY2016	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	120000000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2016Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	1258000	USD
CY2017Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	5977000	USD
CY2015	us-gaap	Restricted Stock Expense RestrictedStockExpense	0	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-636351000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-510484000	USD
CY2015	us-gaap	Revenues Revenues	318033000	USD
CY2016	us-gaap	Revenues Revenues	264422000	USD
CY2017	us-gaap	Revenues Revenues	544276000	USD
CY2017	us-gaap	Sale Leaseback Transaction Current Period Gain Recognized SaleLeasebackTransactionCurrentPeriodGainRecognized	107300000	USD
CY2017	us-gaap	Sale Leaseback Transaction Transaction Costs Investing Activities SaleLeasebackTransactionTransactionCostsInvestingActivities	400000	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
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	9450000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	12362000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	16654000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Accelerated Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost	1500000	USD
CY2015Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	8700000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	31.13
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	1300000	USD
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
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	0	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	24000	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	23.81
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	1034000	shares
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	9.90
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
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	30600000	USD
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	2887000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3064000	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	15.59
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	21.14
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	9.20
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	0.00
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	27.09
CY2017Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	8500000	USD
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P1Y25D
CY2015	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	1300000	USD
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
CY2015Q2	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	7000000	shares
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	833000	shares
CY2015	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	0	USD
CY2015	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	260252000	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
CY2015	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	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
CY2015	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2015	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	10000	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
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	690125000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	1156556000	USD
CY2014Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	866541000	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
CY2015	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	0	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
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	6833	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	3437	shares
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	0	USD
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	69000	USD
CY2015	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-39265000	USD
CY2016	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-41238000	USD
CY2017	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	9715000	USD
CY2016Q4	us-gaap	Unsecured Long Term Debt UnsecuredLongTermDebt	573924000	USD
CY2017Q4	us-gaap	Unsecured Long Term Debt UnsecuredLongTermDebt	574073000	USD
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	81537000	shares
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
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	81537000	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
CY2017	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 natural gas liquids 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, 2017</font><font style="font-family:inherit;font-size:10pt;"> were with Royal Bank of Canada (“RBC”), The Bank of Nova Scotia, BMO Harris Financing (Bank of Montreal) 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>
CY2017	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>
CY2017	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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$MTDR
Matador Resources Co Stock $mtdr

2017 Form 10-K Financial Statement

#000152000618000053 Filed on March 01, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MTDR Matador Resources Co Stock $mtdr

2017 Form 10-K Financial Statement

#000152000618000053 Filed on March 01, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MTDR
Matador Resources Co Stock $mtdr