DERIVATIVE FINANCIAL INSTRUMENTS - Summary of Contracts for Oil and Natural Gas (Details)	Jun. 30, 2021 USD ($) bbl $ / bbl
Open costless collar contracts
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability) \| $	$ (94,122,000)
Open Swap Contracts
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability) \| $	(36,590,000)
Open Basis Swap Contracts
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability) \| $	$ 8,596,000
Derivative Contract, Calculation Period One \| Open costless collar contracts \| Oil
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl	4,740,000
Weighted Average Price Floor ($/Bbl or $/MMBtu)	42.06
Weighted Average Price Ceiling ($/Bbl or $/MMBtu)	55.15
Fair Value of Asset (Liability) \| $	$ (80,256,000)
Derivative Contract, Calculation Period One \| Open costless collar contracts \| Natural Gas
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl	21,200,000
Weighted Average Price Floor ($/Bbl or $/MMBtu)	2.45
Weighted Average Price Ceiling ($/Bbl or $/MMBtu)	3.68
Fair Value of Asset (Liability) \| $	$ (5,148,000)
Derivative Contract, Calculation Period One \| Open Swap Contracts \| Oil
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl	1,020,000
Fair Value of Asset (Liability) \| $	$ (36,590,000)
Fixed Price ($/Bbl)	35.26
Derivative Contract, Calculation Period One \| Open Basis Swap Contracts \| Oil Basis
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl	4,200,000
Fair Value of Asset (Liability) \| $	$ 3,714,000
Fixed Price ($/Bbl)	0.87
Derivative Contract, Calculation Period Two \| Open costless collar contracts \| Natural Gas
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl	3,000,000
Weighted Average Price Floor ($/Bbl or $/MMBtu)	2.60
Weighted Average Price Ceiling ($/Bbl or $/MMBtu)	4.22
Fair Value of Asset (Liability) \| $	$ (952,000)
Derivative Contract, Calculation Period Three \| Open costless collar contracts \| Oil
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl	2,040,000
Weighted Average Price Floor ($/Bbl or $/MMBtu)	50.00
Weighted Average Price Ceiling ($/Bbl or $/MMBtu)	67.85
Fair Value of Asset (Liability) \| $	$ (7,766,000)
Derivative Contract, Calculation Period Three \| Open Basis Swap Contracts \| Oil Basis
Summary of contracts for oil and natural gas
Notional Quantity (Bbl or MMBtu) \| bbl	5,520,000
Fair Value of Asset (Liability) \| $	$ 4,882,000
Fixed Price ($/Bbl)	0.95

Open costless collar contracts for oil and natural gas.

No definition available.

Name:	mtdr_OpenCostlessCollarContractsForOilAndNaturalGasAbstract
Namespace Prefix:	mtdr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=117331979&loc=d3e41228-113958

+ Details

Name:	us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cap rate on a price risk derivative such as a cap or collar. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeCapPrice
Namespace Prefix:	us-gaap_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant

- Definition

Floor rate on a price risk derivative such as a floor or a collar. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFloorPrice
Namespace Prefix:	us-gaap_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant

- Definition

Nominal number of units used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 40
-Section 50
-Paragraph 5
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123477628&loc=d3e90205-114008

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 18
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1I
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495371-112611

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

+ Details

Name:	us-gaap_DerivativeNonmonetaryNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Average fixed price related to the group of price risk swap derivatives.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeSwapTypeAverageFixedPrice
Namespace Prefix:	us-gaap_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_OpenOptionContractsWrittenTypeAxis=mtdr_OpenCostlessCollarContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_OpenOptionContractsWrittenTypeAxis=mtdr_OpenSwapContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_OpenOptionContractsWrittenTypeAxis=mtdr_OpenBasisSwapContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	mtdr_DerivativeContractPeriodAxis=mtdr_DerivativeContractCalculationPeriodOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ReserveQuantitiesByTypeOfReserveAxis=srt_OilReservesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ReserveQuantitiesByTypeOfReserveAxis=srt_NaturalGasReservesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ReserveQuantitiesByTypeOfReserveAxis=mtdr_OilBasisSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	mtdr_DerivativeContractPeriodAxis=mtdr_DerivativeContractCalculationPeriodTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	mtdr_DerivativeContractPeriodAxis=mtdr_DerivativeContractCalculationPeriodThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: