Name:	mpo_DebtorReorganizationItemsGainLossOnFreshStartAdjustments
Namespace Prefix:	mpo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents the debtor reorganization items for legal, professional fees and expenses related to bankruptcy.

No definition available.

Name:	mpo_DebtorReorganizationItemsLegalAndProfessionalFeesAndExpenses
Namespace Prefix:	mpo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents the debtor reorganization items for other expenses related to bankruptcy.

No definition available.

Name:	mpo_DebtorReorganizationItemsOther
Namespace Prefix:	mpo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents information about the abandoned office fixed assets included with other reorganization items.

No definition available.

Name:	mpo_ReorganizationItemsAbandonedOfficeFixedAssets
Namespace Prefix:	mpo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents information about the abandoned office lease included with other reorganization items.

No definition available.

Name:	mpo_ReorganizationItemsAbandonedOfficeLease
Namespace Prefix:	mpo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of net gain (loss) on settlement of other claims for entities in bankruptcy, reported as a reorganization item.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 45
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=49172455&loc=d3e55730-112764

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=34712771&loc=d3e56145-112766

Name:	us-gaap_DebtorReorganizationItemsGainLossOnSettlementOfOtherClaimsNet1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Total amount of reorganization items.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=34712771&loc=d3e56145-112766

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 45
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=49172455&loc=d3e55730-112764

Name:	us-gaap_ReorganizationItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

Name:	us-gaap_ReorganizationItemsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

For a debtor, the aggregate gain (loss) recognized on the restructuring of payables, after the impact of income tax expense or benefit, arising from the difference between the book value of the debt before the restructuring and the fair value of the payments on the debt after restructuring is complete.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 60
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6402221&loc=d3e15743-112638

Name:	us-gaap_TroubledDebtRestructuringDebtorCurrentPeriodGainLossOnRestructuringNetOfTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_UnamortizedDebtIssuanceExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Name:	us-gaap_StatementScenarioAxis=us-gaap_PredecessorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_DebtInstrumentAxis=mpo_SeniorNotesUnsecured10.75PercentDue2020Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_DebtInstrumentAxis=mpo_SeniorNotesUnsecured9.25PercentDue2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_FreshStartAdjustmentsTypeOfFreshStartAdjustmentAxis=mpo_FreshStartAdjustmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_DebtInstrumentAxis=mpo_SecondLienNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: