Condensed Consolidated Statement of Changes in Shareholders' Equity - Unaudited (Parenthetical) - USD ($) $ in Millions	3 Months Ended
Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Contribution related to formation of San Mateo, tax		$ 3.1	$ 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.

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