Nature of Operations (Details)	Sep. 30, 2012 Subsidiaries
Nature of Operations (Textual) [Abstract]
Number of wholly owned subsidiary	4

Number of wholly owned subsidiaries of the registrant's wholly owned subsidiary.

No definition available.

Name:	mtdr_NumberOfWhollyOwnedSubsidiary
Namespace Prefix:	mtdr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant