Represents the number of borrowers defaulted.

No definition available.

Name:	mvbf_NumberOfBorrowersDefaulted
Namespace Prefix:	mvbf_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents specific reserve allocations for troubled debt restructurings.

+ References

No definition available.

+ Details

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

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13531-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13537-108611

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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_FinancingReceivableModificationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after troubled debt restructuring, of modified financing receivable.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, before troubled debt restructuring, of financing receivable to be modified.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of financing receivable modified as troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554

+ Details

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

- Definition

Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953682-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953682-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mvbf_CommercialAcquisitionAndDevelopmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mvbf_SBAPaycheckProtectionProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_HomeEquityLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis=mvbf_CommercialBorrowerTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis=mvbf_CommercialBorrowerOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=mvbf_TroubledDebtRestructuredLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	mvbf_AccrualStatusAxis=mvbf_AccruingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=mvbf_PortfolioRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Loans and Allowance for Loan Losses - Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020 USD ($) contract loan	Jun. 30, 2019 USD ($) contract	Jun. 30, 2020 USD ($) contract borrower loan	Jun. 30, 2019 USD ($) contract loan	Dec. 31, 2019 USD ($)
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Specific reserve allocations for TDR's	$ 1,200		$ 1,200		$ 527
Troubled debt restructuring loans	$ 13,900		$ 13,900		7,700
Number of Contracts \| contract	4	1	8	2
Pre-Modification Outstanding Recorded Investment	$ 6,170	$ 68	$ 6,483	$ 336
Post-Modification Outstanding Recorded Investment	$ 6,170	$ 68	6,478	$ 333
Acquisition & Development
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Loans defaulted under the restructured terms			$ 3,000
Number of loans to defaulted borrowers \| loan			4
Number of borrower defaulted \| borrower			2
Commercial and Non-Residential Real Estate
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Number of loans to defaulted borrowers \| loan	0		3	2
Number of borrower defaulted \| borrower			1
Number of Contracts \| contract	3	1	7	2
Pre-Modification Outstanding Recorded Investment	$ 6,083	$ 68	$ 6,396	$ 336
Post-Modification Outstanding Recorded Investment	$ 6,083	$ 68	$ 6,391	$ 333
Commercial and Non-Residential Real Estate \| Commercial Business
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Number of Contracts \| contract	3	1	5	2
Pre-Modification Outstanding Recorded Investment	$ 6,083	$ 68	$ 6,237	$ 336
Post-Modification Outstanding Recorded Investment	$ 6,083	$ 68	$ 6,232	$ 333
Commercial and Non-Residential Real Estate \| Commercial Real Estate
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Number of Contracts \| contract	0	0	2	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 159	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 159	$ 0
Commercial and Non-Residential Real Estate \| Acquisition & Development
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Number of Contracts \| contract	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Commercial and Non-Residential Real Estate \| SBA Paycheck Protection Program
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Number of Contracts \| contract	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Residential Real Estate
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Number of borrower defaulted \| borrower			1
Number of Contracts \| contract	1	0	1	0
Pre-Modification Outstanding Recorded Investment	$ 87	$ 0	$ 87	$ 0
Post-Modification Outstanding Recorded Investment	$ 87	$ 0	$ 87	$ 0
Home Equity
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Number of Contracts \| contract	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Consumer
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Number of Contracts \| contract	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	0	0	0	0
Commercial Borrower Two \| Acquisition & Development
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Loans defaulted under the restructured terms			2,300
Commercial Borrower One \| Acquisition & Development
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Loans defaulted under the restructured terms			657
Troubled Debt Restructured Loans \| Commercial and Non-Residential Real Estate
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Troubled debt restructuring loans	6,100	$ 336	6,100	$ 336
Troubled Debt Restructured Loans \| Residential Real Estate
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Troubled debt restructuring loans	87		87
Accruing
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Troubled debt restructuring loans	$ 4,300		$ 4,300		$ 4,400
Accruing \| Portfolio Risk \| Troubled Debt Restructured Loans
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Percentage of total impaired loans			24.00%		46.00%