Trust preferred securities (Details Textual) - USD ($)
3 Months Ended
Mar. 31, 2016
Mar. 15, 2016
Dec. 31, 2015
Debt Instrument [Line Items]      
Trust preferred capital notes $ 8,764,000   $ 8,764,000
Deferred interest payments on the junior subordinated debt securities $ 91,000   $ 1,346,000
Percentage of Tier one risk based capital required for capital adequacy (in hundredths) 25.00%    
Southern Community Financial Capital Trust I [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Issuance Date Feb. 24, 2005    
Trust preferred capital notes $ 5,200,000    
Debt Instrument, description of variable rate basis three-month LIBOR plus 2.15%    
Interest rate (in hundredths) 2.78%    
Maturity date Mar. 15, 2035    
Principal assets of the trust $ 5,200,000    
Village Financial Statutory Trust II [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Issuance Date Sep. 20, 2007    
Trust preferred capital notes $ 3,600,000    
Debt Instrument, description of variable rate basis three-month LIBOR plus 1.4%    
Interest rate (in hundredths) 2.03%    
Maturity date Dec. 31, 2037    
Principal assets of the trust $ 3,600,000    
Trust Preferred Securities [Member]      
Debt Instrument [Line Items]      
Deferred interest payments on the junior subordinated debt securities   $ 1,332,633