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Deposits - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Deposits [Abstract]
Overdrawn deposits	$ 4.2	$ 2.8

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- Definition

Financing Receivable, Overdrawn Deposits

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

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