Condensed Consolidated Statement of Changes in Shareholders' Equity - Unaudited (Parenthetical) $ in Millions	3 Months Ended
Mar. 31, 2019 USD ($)
Statement of Stockholders' Equity [Abstract]
Contribution related to formation of San Mateo, tax	$ 3.1

Adjustment To Additional Paid In Capital, Formation Of Joint Venture, Tax

No definition available.

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Namespace Prefix:	mtdr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration