LOANS AND ALLOWANCE FOR LOAN LOSSES - Primary Segments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Primary segments of the loan portfolio:
Individually evaluated for impairment	$ 22,455	$ 15,394
Collectively evaluated for impairment	1,830,317	1,399,968
Total loans	1,852,772	1,415,362
Purchased credit impaired loans
Primary segments of the loan portfolio:
Collectively evaluated for impairment	18,700
Commercial
Primary segments of the loan portfolio:
Individually evaluated for impairment	13,800	13,334
Collectively evaluated for impairment	1,466,727	1,127,780
Total loans	1,480,527	1,141,114
Commercial \| Purchased credit impaired loans
Primary segments of the loan portfolio:
Collectively evaluated for impairment	13,900
Residential
Primary segments of the loan portfolio:
Individually evaluated for impairment	8,179	1,960
Collectively evaluated for impairment	297,961	238,304
Total loans	306,140	240,264
Residential \| Purchased credit impaired loans
Primary segments of the loan portfolio:
Collectively evaluated for impairment	4,400
Home equity
Primary segments of the loan portfolio:
Individually evaluated for impairment	217	95
Collectively evaluated for impairment	21,969	30,733
Total loans	22,186	30,828
Consumer
Primary segments of the loan portfolio:
Individually evaluated for impairment	259	5
Collectively evaluated for impairment	43,660	3,151
Total loans	43,919	$ 3,156
Consumer \| Purchased credit impaired loans
Primary segments of the loan portfolio:
Collectively evaluated for impairment	$ 400

Financing Receivable, Before Allowance For Credit Loss And Fee, Excluding Purchased Credit Deteriorated Loans Acquired

No definition available.

Name:	mvbf_FinancingReceivableBeforeAllowanceForCreditLossAndFeeExcludingPurchasedCreditDeterioratedLoansAcquired
Namespace Prefix:	mvbf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

- Definition

The balance of financing receivables that were collectively evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

+ Details

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

- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

+ Details

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

- Details

Name:	us-gaap_CreditLossStatusAxis=us-gaap_FinancialAssetAcquiredWithCreditDeteriorationMember
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_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: