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Trust preferred securities (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 20, 2007
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]      
Trust preferred capital notes   $ 8,764 $ 8,764
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  
Interest rate (in hundredths)   2.36% 2.38%
Maturity date   Mar. 15, 2035  
Principal assets of the trust   $ 5,200  
Southern Community Financial Capital Trust I [Member] | LIBOR      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate   2.15%  
Village Financial Statutory Trust II [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Issuance Date   Sep. 20, 2007  
Trust preferred capital notes $ 3,600    
Interest rate (in hundredths)   1.61% 1.63%
Principal assets of the trust   $ 3,600  
Village Financial Statutory Trust II [Member] | LIBOR      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 1.40%