Name:	mvbf_DebtInstrumentBasisSpreadOnVariableRateAfterFifthAnniversary
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Data Type:	num:percentItemType
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The period of notice that the issuer must provide the holders of its intent to prepay.

No definition available.

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Threshold period of specified consecutive trading days after the first, second, third, fourth, or fifth anniversaries of the issuance of the debt instrument or upon a notice to prepay by the issuer within which the debt instrument may be convertible into common stock at the election of the holder.

No definition available.

Name:	mvbf_DebtInstrumentConvertibleThresholdConsecutiveTradingDaysAfterFirstSecondThirdFourthAndFifthAnniversariesOfIssuanceOrPrepaymentNotice
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Data Type:	xbrli:durationItemType
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Face (par) amount of each increment of debt instrument issued.

No definition available.

Name:	mvbf_DebtInstrumentFaceAmountOfIncrementalIssue
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The amount of investment of debtholder.

No definition available.

Name:	mvbf_DebtInstrumentInvestmentAmountOfHolder
Namespace Prefix:	mvbf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The maximum contractual rate for funds borrowed under the debt agreement after the fifth anniversary of issuance.

No definition available.

Name:	mvbf_DebtInstrumentMaximumInterestRateStatedPercentageAfterFifthAnniversary
Namespace Prefix:	mvbf_
Data Type:	num:percentItemType
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The minimum investment in the debt instrument required by investors under terms of the offering.

No definition available.

Name:	mvbf_DebtInstrumentMinimumInvestmentRequired
Namespace Prefix:	mvbf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The minimum ownership of common stock as a percentage of debt instrument principal acquired.

No definition available.

Name:	mvbf_DebtInstrumentMinimumOwnershipOfCommonStockAsPercentageOfPrincipalAcquired
Namespace Prefix:	mvbf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The period from issuance at which the issuer of the debt instrument may make prepayments on the unpaid principal and interest amounts.

No definition available.

Name:	mvbf_Debtinstrumentperiodfromissuancethatissuermayprepaydebt
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Data Type:	xbrli:durationItemType
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The period from the date of issuance at which the debt instrument may be redeemed.

No definition available.

Name:	mvbf_DebtInstrumentRedemptionPeriodFromIssuance
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Data Type:	xbrli:durationItemType
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The threshold amount of new senior debt issuances at which the issuer must obtain the consent of the holder.

No definition available.

Name:	mvbf_DebtInstrumentThresholdAmountOfNewSeniorDebtIssuanceThatIssuerMustObtainHolderConsent
Namespace Prefix:	mvbf_
Data Type:	xbrli:monetaryItemType
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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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Data Type:	num:percentItemType
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Period Type:	duration

The price per share of the conversion feature embedded in the debt instrument.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870

Name:	us-gaap_DebtInstrumentConvertibleConversionPrice1
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The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

No definition available.

Name:	us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Face (par) amount of debt instrument at time of issuance.

Reference 1: 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

Reference 2: 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

Name:	us-gaap_DebtInstrumentFaceAmount
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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentLineItems
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Data Type:	xbrli:stringItemType
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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph e

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
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Data Type:	num:percentItemType
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Period Type:	duration

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Interest expense incurred during the reporting period on subordinated notes and debentures. Includes amortization of expenses incurred in the issuance of subordinated notes and debentures.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.8)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Name:	us-gaap_InterestExpenseSubordinatedNotesAndDebentures
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Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 10

-Section F

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Article 5

-Subsection 19, 20, 22