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Derivative Financial Instruments Derivative Financial Instruments - Narrative (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
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Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
Derivative liability | $ (132,550) | $ 3,881

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- Definition Derivative Asset (Liability), Net + References No definition available. + Details
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Namespace Prefix: | mtdr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration