CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS’ EQUITY — UNAUDITED (Parenthetical) - USD ($) $ in Millions	3 Months Ended
Jun. 30, 2020	Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]
Contribution related to formation of San Mateo, net of tax		$ 3.1
Contributions from non-controlling interest owners of less-than-wholly-owned subsidiaries, tax	$ 0.5	$ 4.3

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