SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Other Narrative (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jun. 30, 2016
USD ($)
Dec. 31, 2013
USD ($)
subsidiary
Dec. 31, 2016
USD ($)
segment
office
$ / shares
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Sep. 30, 2013
Dec. 31, 2012
Summary of Significant Accounting Policies [Line Items]              
Number of subsidiaries merged into company | subsidiary   3          
Loan indemnification reserve     $ 200 $ 150      
Number of reportable segments | segment     3        
Period past due for loans to be considered as delinquent     90 days        
Minimum period loans are past due as condition for determining whether impaired     90 days        
Total loans serviced for others     $ 190 956      
Amortization taken on servicing asset     1,000 915 $ 574    
Loans serviced     296,400 334,500      
Goodwill   $ 17,779 18,480 18,480 17,779    
Other real estate     414 239      
Marketing expense     $ 1,253 1,352 1,137    
Minimum | Building and Leasehold Improvements              
Summary of Significant Accounting Policies [Line Items]              
Estimated useful lives     7 years        
Minimum | Furniture, Fixtures And Equipment              
Summary of Significant Accounting Policies [Line Items]              
Estimated useful lives     3 years        
Maximum | Building and Leasehold Improvements              
Summary of Significant Accounting Policies [Line Items]              
Estimated useful lives     40 years        
Maximum | Furniture, Fixtures And Equipment              
Summary of Significant Accounting Policies [Line Items]              
Estimated useful lives     10 years        
MVB Mortgage              
Summary of Significant Accounting Policies [Line Items]              
Number of mortgage only offices | office     11        
Subsidiary Bank              
Summary of Significant Accounting Policies [Line Items]              
FHLB stock     $ 5,800 8,600      
FHLB stock par value (in dollars per share) | $ / shares     $ 100        
Lender Service Provider, LLC              
Summary of Significant Accounting Policies [Line Items]              
Ownership interest           25.00% 50.00%
Discontinued Operations, Disposed of by Sale | USI Insurance Services              
Summary of Significant Accounting Policies [Line Items]              
Gain on sale of subsidiary $ 6,900   $ 6,926 0 0    
Core Deposit Intangible              
Summary of Significant Accounting Policies [Line Items]              
Useful life of intangible asset     10 years        
Finite-lived intangible assets, net   $ 5 $ 744 $ 845 $ 1