Loans and Allowance for Loan Losses - Primary Segments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Primary segments of the loan portfolio:
Individually evaluated for impairment	$ 15,860	$ 25,966
Collectively evaluated for impairment	2,354,802	1,845,481
Total loans	2,370,662	1,871,447
Purchased credit impaired loans
Primary segments of the loan portfolio:
Collectively evaluated for impairment	2,482	18,675
Total Commercial
Primary segments of the loan portfolio:
Individually evaluated for impairment	11,816	16,552
Collectively evaluated for impairment	1,599,094	1,477,879
Total loans	1,610,910	1,494,431
Total Commercial \| Business
Primary segments of the loan portfolio:
Individually evaluated for impairment	10,451	12,954
Collectively evaluated for impairment	840,621	808,661
Total loans	851,072	821,615
Total Commercial \| Real estate
Primary segments of the loan portfolio:
Individually evaluated for impairment	1,365	2,206
Collectively evaluated for impairment	631,474	570,530
Total loans	632,839	572,736
Total Commercial \| Acquisition, development and construction
Primary segments of the loan portfolio:
Individually evaluated for impairment	0	1,392
Collectively evaluated for impairment	126,999	98,688
Total loans	126,999	100,080
Total Commercial \| Purchased credit impaired loans
Primary segments of the loan portfolio:
Collectively evaluated for impairment	0	13,904
Total Commercial \| Purchased credit impaired loans \| Business
Primary segments of the loan portfolio:
Collectively evaluated for impairment	0	2,629
Total Commercial \| Purchased credit impaired loans \| Real estate
Primary segments of the loan portfolio:
Collectively evaluated for impairment	0	11,018
Total Commercial \| Purchased credit impaired loans \| Acquisition, development and construction
Primary segments of the loan portfolio:
Collectively evaluated for impairment	0	257
Residential
Primary segments of the loan portfolio:
Individually evaluated for impairment	2,603	8,765
Collectively evaluated for impairment	606,849	301,733
Total loans	609,452	310,498
Residential \| Purchased credit impaired loans
Primary segments of the loan portfolio:
Collectively evaluated for impairment	2,482	4,358
Home equity lines of credit
Primary segments of the loan portfolio:
Individually evaluated for impairment	90	217
Collectively evaluated for impairment	18,644	21,969
Total loans	18,734	22,186
Consumer
Primary segments of the loan portfolio:
Individually evaluated for impairment	1,351	432
Collectively evaluated for impairment	130,215	43,900
Total loans	131,566	44,332
Consumer \| Purchased credit impaired loans
Primary segments of the loan portfolio:
Collectively evaluated for impairment	$ 0	$ 413

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.

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 https://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

Amortized cost excluding accrued interest, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 20
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=6378536&loc=d3e10095-111533

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess
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_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_CommercialAcquisitionAndDevelopmentMember
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: