Debt Instrument, Covenant, Default Period, When Due Of Interest

No definition available.

Name:	mtdr_DebtInstrumentCovenantDefaultPeriodWhenDueOfInterest
Namespace Prefix:	mtdr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Covenant, Failure To Comply With Other Agreements, Period After Notice

+ References

No definition available.

+ Details

Name:	mtdr_DebtInstrumentCovenantFailureToComplyWithOtherAgreementsPeriodAfterNotice
Namespace Prefix:	mtdr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Covenant, Failure To Comply With Reporting Obligations, Period After Notice

+ References

No definition available.

+ Details

Name:	mtdr_DebtInstrumentCovenantFailureToComplyWithReportingObligationsPeriodAfterNotice
Namespace Prefix:	mtdr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Covenant, Maximum Aggregate Payment Defaults And Accelerations

+ References

No definition available.

+ Details

Name:	mtdr_DebtInstrumentCovenantMaximumAggregatePaymentDefaultsAndAccelerations
Namespace Prefix:	mtdr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Covenant, Maximum Outstanding Judgements

+ References

No definition available.

+ Details

Name:	mtdr_DebtInstrumentCovenantMaximumOutstandingJudgements
Namespace Prefix:	mtdr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Covenant, Maximum Outstanding Judgements, Payment Period

+ References

No definition available.

+ Details

Name:	mtdr_DebtInstrumentCovenantMaximumOutstandingJudgementsPaymentPeriod
Namespace Prefix:	mtdr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Covenant, Threshold Percentage Of Principle

+ References

No definition available.

+ Details

Name:	mtdr_DebtInstrumentCovenantThresholdPercentageOfPrinciple
Namespace Prefix:	mtdr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Redemption Period

+ References

No definition available.

+ Details

Name:	mtdr_DebtInstrumentRedemptionPeriod
Namespace Prefix:	mtdr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Redemption Price, Threshold Percentage of Outstanding Principal Amount Remaining

+ References

No definition available.

+ Details

Name:	mtdr_DebtInstrumentRedemptionPriceThresholdPercentageofOutstandingPrincipalRemaining
Namespace Prefix:	mtdr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Gain (Loss) On Extinguishment Of Debt, Premium On Debt Redemption

+ References

No definition available.

+ Details

Name:	mtdr_GainLossOnExtinguishmentOfDebtPremiumOnDebtRedemption
Namespace Prefix:	mtdr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfUnsecuredDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=mtdr_SeniorNotesDue2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=mtdr_A2026NotesOfferingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=mtdr_SeniorNotesDue2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=mtdr_Additional2026NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt Senior Unsecured Notes (Details) - USD ($)			3 Months Ended		9 Months Ended
Debt Senior Unsecured Notes (Details) - USD ($)	Oct. 04, 2018	Aug. 21, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Oct. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Debt issued			$ 740,063,000		$ 740,063,000				$ 574,073,000
Proceeds from issuance of debt					750,000,000	$ 0
Prepayment premium on extinguishment of debt			(31,226,000)	$ 0	(31,226,000)	$ 0
Senior Notes \| Senior Notes Due 2023
Debt Instrument [Line Items]
Long-term debt outstanding								$ 575,000,000
Interest rate								6.875%
Payments on debt			$ 30,400,000
Senior Notes \| Senior Notes Due 2023 \| Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Redemption price, percentage of principal amount			105.156%
Senior Notes \| 2026 Notes Offering
Debt Instrument [Line Items]
Interest rate		5.875%
Debt issued		$ 750,000,000
Proceeds from issuance of debt		$ 740,000,000
Senior Notes \| Senior Notes Due 2026
Debt Instrument [Line Items]
Long-term debt outstanding			$ 750,000,000		$ 750,000,000
Interest rate			5.875%		5.875%
Subsequent Event \| Senior Notes \| Additional 2026 Notes
Debt Instrument [Line Items]
Interest rate	5.875%
Debt issued	$ 300,000,000
Proceeds from issuance of debt	$ 297,600,000
Redemption price, percentage of principal amount	100.50%
Subsequent Event \| Senior Notes \| Additional 2026 Notes \| Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Basis spread on variable rate	5.00%
Debt covenant, threshold percentage of principal	25.00%
Debt covenant, default period, when due of interest	30 days
Debt covenant, failure to comply with reporting obligations, period after notice	180 days
Debt covenant, failure to comply with other agreements, period after notice	60 days
Debt covenant, maximum aggregate payment defaults and accelerations	$ 50,000,000
Debt covenant, maximum outstanding judgements	$ 50,000,000.0
Debt covenant, maximum outstanding judgements, payment period	60 days
Subsequent Event \| Senior Notes \| Senior Notes Due 2026
Debt Instrument [Line Items]
Long-term debt outstanding							$ 1,050,000,000
Subsequent Event \| Senior Notes \| Senior Notes Due 2026 \| Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Redemption price, percentage of principal amount	35.00%
Redemption price, percentage	105.875%
Redemption price, threshold percentage of outstanding principal	65.00%
Subsequent Event \| Senior Notes \| Senior Notes Due 2026 \| Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Redemption price, percentage	104.406%
Redemption period	180 days