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BORROWED FUNDS - Term notes from the FHLB (Details) (USD $)
In Thousands, unless otherwise specified
24 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Borrowed funds    
Borrowings from the FHLB $ 5,458us-gaap_FederalHomeLoanBankAdvancesLongTerm $ 6,619us-gaap_FederalHomeLoanBankAdvancesLongTerm
Interest rate on debt security (as a percent) 7.00%us-gaap_DebtInstrumentInterestRateStatedPercentage  
Fixed interest rate note, originating between April 1999 and December 2007, due between April 2014 and April 2022    
Borrowed funds    
Borrowings from the FHLB 4,618us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_DebtInstrumentAxis
= mvbf_FederalHomeLoanBankFixedInterestRateNoteOriginatingApril1999AndDecember2007Member
5,759us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_DebtInstrumentAxis
= mvbf_FederalHomeLoanBankFixedInterestRateNoteOriginatingApril1999AndDecember2007Member
Fixed interest rate note, originating between April 1999 and December 2007, due between April 2014 and April 2022 | Minimum    
Borrowed funds    
Interest rate on debt security (as a percent) 4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mvbf_FederalHomeLoanBankFixedInterestRateNoteOriginatingApril1999AndDecember2007Member
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Fixed interest rate note, originating between April 1999 and December 2007, due between April 2014 and April 2022 | Maximum    
Borrowed funds    
Interest rate on debt security (as a percent) 5.90%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mvbf_FederalHomeLoanBankFixedInterestRateNoteOriginatingApril1999AndDecember2007Member
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Amortizing fixed interest rate note, originating February 2007, due February 2022    
Borrowed funds    
Borrowings from the FHLB 840us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_DebtInstrumentAxis
= mvbf_FederalHomeLoanBankFixedInterestRateNoteOriginatingFebruary2007Member
860us-gaap_FederalHomeLoanBankAdvancesLongTerm
/ us-gaap_DebtInstrumentAxis
= mvbf_FederalHomeLoanBankFixedInterestRateNoteOriginatingFebruary2007Member
Interest rate on debt security (as a percent) 5.22%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= mvbf_FederalHomeLoanBankFixedInterestRateNoteOriginatingFebruary2007Member
 
Monthly installments $ 5us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= mvbf_FederalHomeLoanBankFixedInterestRateNoteOriginatingFebruary2007Member