FAIR VALUE MEASUREMENTS - Quantitative Information About Level III Significant Unobservable Inputs (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Non-recurring \| Impaired loans
Quantitative Information about Level III Fair Value Measurements
Fair value	$ 11,609	$ 14,362
Non-recurring \| Impaired loans \| Level III
Quantitative Information about Level III Fair Value Measurements
Fair value	$ 11,609	$ 14,362
Non-recurring \| Impaired loans \| Appraisal of collateral \| Level III \| Minimum
Unobservable Input
Appraisal adjustments	20.00%	20.00%
Liquidation expense	5.00%	5.00%
Non-recurring \| Impaired loans \| Appraisal of collateral \| Level III \| Maximum
Unobservable Input
Appraisal adjustments	62.00%	62.00%
Liquidation expense	10.00%	10.00%
Non-recurring \| Other real estate owned
Quantitative Information about Level III Fair Value Measurements
Fair value	$ 414	$ 239
Non-recurring \| Other real estate owned \| Level III
Quantitative Information about Level III Fair Value Measurements
Fair value	$ 414	$ 239
Non-recurring \| Other real estate owned \| Appraisal of collateral \| Level III \| Minimum
Unobservable Input
Appraisal adjustments	20.00%	20.00%
Liquidation expense	5.00%	5.00%
Non-recurring \| Other real estate owned \| Appraisal of collateral \| Level III \| Maximum
Unobservable Input
Appraisal adjustments	30.00%	30.00%
Liquidation expense	10.00%	10.00%
Recurring \| Interest rate lock commitment \| Level III
Quantitative Information about Level III Fair Value Measurements
Fair value	$ 1,546	$ 1,537
Recurring \| Interest rate lock commitment \| Pricing model \| Level III \| Minimum
Unobservable Input
Pull through rates	73.00%	76.00%
Recurring \| Interest rate lock commitment \| Pricing model \| Level III \| Maximum
Unobservable Input
Pull through rates	85.00%	85.00%

Represents the appraisal adjustment as a percentage of appraisal, used as an input to measure fair value.

No definition available.

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

- Definition

Represents the liquidation expenses as a percentage of appraisal, used as an input to measure fair value.

+ References

No definition available.

+ Details

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

- Definition

Fair Value Inputs, Pull Through Rate

+ References

No definition available.

+ Details

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

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

+ Details

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

- References

No definition available.

+ Details

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

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=mvbf_ImpairedFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationTechniqueAxis=mvbf_AppraisalOfCollateralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=mvbf_OtherRealEstateOwnedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_InterestRateLockCommitmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationTechniqueAxis=us-gaap_MarketApproachValuationTechniqueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: