Loans and Allowance for Loan Losses - Internal Risk Rating (Details)	9 Months Ended
Sep. 30, 2016 category
Average recorded investment in impaired loans and related interest income recognized
Number of points in internal risk rating system	9
Number of categories in internal risk rating system considered as not criticized	6

Represents the number of points in internal risk rating system used by bank management to monitor the credit quality of the overall loan portfolio.

No definition available.

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