The amount of amortization of gain (loss) on restructuring of debt instrument recorded during the period.

No definition available.

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

- Definition

Face (par) amount of the original debt instrument that was exchanged with other debt issued during the period.

+ References

No definition available.

+ Details

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

- Definition

Percentage of par value of debt exchanged.

+ References

No definition available.

+ Details

Name:	mpo_DebtInstrumentExchangedPercentageOfPrincipalAmount
Namespace Prefix:	mpo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the amount of deferred gain on debt forgiven that is yet to be amortized.

+ References

No definition available.

+ Details

Name:	mpo_DebtInstrumentUnamortizedDeferredGainOnDebt
Namespace Prefix:	mpo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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

- Definition

For a debtor, the aggregate gain (loss) recognized on the restructuring of payables arises 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.

+ References

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

+ Details

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

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Details

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

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=mpo_ThirdLienNotes12PercentDue2020Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

Debt - Debt Restructuring (Details) - USD ($) $ in Thousands				10 Months Ended	12 Months Ended
	Jun. 02, 2015	Jun. 02, 2015	May 21, 2015	Oct. 20, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	May 31, 2013	Oct. 01, 2012
Debt Restructuring
Gain (loss) on restructuring of debt					$ 0
Principle Balance Outstanding					$ 128,059
Predecessor
Debt Restructuring
Borrowings						$ 625,000
Repayment of revolving credit facility				$ (121,324)		(468,150)	$ (131,000)
Amortization of Forgiven Debt				$ (8,246)		(14,948)
Unamortized Deferred Gain on Debt Forgiven						119,654
Principle Balance Outstanding						1,795,930
Predecessor \| Second Lien Notes
Debt Restructuring
Borrowings			$ 625,000
Unamortized Deferred Gain on Debt Forgiven						42,293
Principle Balance Outstanding						625,000
Predecessor \| Third Lien Notes
Debt Restructuring
Unamortized Deferred Gain on Debt Forgiven						77,361
Principle Balance Outstanding	$ 20,000	$ 20,000	504,100			529,653
Predecessor \| 2020 Senior Notes
Debt Restructuring
Principal amount extinguished		63,900
Exchanges	306,400	26,600	279,800
Principle Balance Outstanding						293,625			$ 600,000
Predecessor \| 2021 Senior Notes
Debt Restructuring
Principal amount extinguished		70,700
Exchanges	$ 352,300	$ 2,000	$ 350,300
Principle Balance Outstanding						$ 347,652		$ 700,000
Predecessor \| Unsecured Notes
Debt Restructuring
Percentage of exchanged debt's par value		70.00%	80.00%