Loans and Allowance for Loan Losses - Impaired Loans Additional Information (Details)	3 Months Ended
Mar. 31, 2015 item
LOANS AND ALLOWANCE FOR LOAN LOSSES
Number of points in internal risk rating system	9
Number of categories in internal risk rating system considered as not criticized	6
Maximum period above which loans past due are considered Substandard	90 days

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