Allowance for Loan Losses - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Allowance for loan losses
Loans, excluding consumer finance	$ 695,383	$ 609,706
Pass
Allowance for loan losses
Loans, excluding consumer finance	652,903	563,666
Special Mention
Allowance for loan losses
Loans, excluding consumer finance	9,988	11,161
Substandard
Allowance for loan losses
Loans, excluding consumer finance	28,215	28,722
Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	4,277	6,157
CVBK | Pass
Allowance for loan losses
Loans, excluding consumer finance		71,140
CVBK | Special Mention
Allowance for loan losses
Loans, excluding consumer finance		4,090
CVBK | Substandard
Allowance for loan losses
Loans, excluding consumer finance		5,150
CVBK | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance		542
Real estate - residential mortgage
Allowance for loan losses
Loans, excluding consumer finance	188,264	186,763
Real estate - residential mortgage | Pass
Allowance for loan losses
Loans, excluding consumer finance	181,814	181,107
Real estate - residential mortgage | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	2,037	1,276
Real estate - residential mortgage | Substandard
Allowance for loan losses
Loans, excluding consumer finance	2,761	2,083
Real estate - residential mortgage | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	1,652	2,297
Real estate - construction | Construction Lending
Allowance for loan losses
Loans, excluding consumer finance	47,062	5,996
Real estate - construction | Construction Lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	47,062	5,924
Real estate - construction | Construction Lending | Special Mention
Allowance for loan losses
Loans, excluding consumer finance		72
Real estate - construction | Consumer lot lending
Allowance for loan losses
Loans, excluding consumer finance	8,670	1,763
Real estate - construction | Consumer lot lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	8,670	1,763
Commercial, financial and agricultural | Commercial real estate lending
Allowance for loan losses
Loans, excluding consumer finance	261,786	217,616
Commercial, financial and agricultural | Commercial real estate lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	243,427	195,479
Commercial, financial and agricultural | Commercial real estate lending | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	5,860	6,089
Commercial, financial and agricultural | Commercial real estate lending | Substandard
Allowance for loan losses
Loans, excluding consumer finance	10,880	13,533
Commercial, financial and agricultural | Commercial real estate lending | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	1,619	2,515
Commercial, financial and agricultural | Land acquisition and development lending
Allowance for loan losses
Loans, excluding consumer finance	43,472	46,311
Commercial, financial and agricultural | Land acquisition and development lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	29,595	45,061
Commercial, financial and agricultural | Land acquisition and development lending | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	565	856
Commercial, financial and agricultural | Land acquisition and development lending | Substandard
Allowance for loan losses
Loans, excluding consumer finance	13,312	394
Commercial, financial and agricultural | Builder line lending
Allowance for loan losses
Loans, excluding consumer finance	22,391	20,971
Commercial, financial and agricultural | Builder line lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	21,235	19,252
Commercial, financial and agricultural | Builder line lending | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	789	829
Commercial, financial and agricultural | Builder line lending | Substandard
Allowance for loan losses
Loans, excluding consumer finance	367	531
Commercial, financial and agricultural | Builder line lending | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance		359
Commercial, financial and agricultural | Commercial business lending
Allowance for loan losses
Loans, excluding consumer finance	62,739	71,164
Commercial, financial and agricultural | Commercial business lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	62,044	57,928
Commercial, financial and agricultural | Commercial business lending | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	255	1,306
Commercial, financial and agricultural | Commercial business lending | Substandard
Allowance for loan losses
Loans, excluding consumer finance	309	11,844
Commercial, financial and agricultural | Commercial business lending | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	131	86
Equity lines
Allowance for loan losses
Loans, excluding consumer finance	52,600	50,111
Equity lines | Pass
Allowance for loan losses
Loans, excluding consumer finance	51,186	48,392
Equity lines | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	480	617
Equity lines | Substandard
Allowance for loan losses
Loans, excluding consumer finance	177	221
Equity lines | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	757	881
Consumer Loan
Allowance for loan losses
Loans, excluding consumer finance	8,399	9,011
Consumer Loan | Pass
Allowance for loan losses
Loans, excluding consumer finance	7,870	8,760
Consumer Loan | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	2	116
Consumer Loan | Substandard
Allowance for loan losses
Loans, excluding consumer finance	409	116
Consumer Loan | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	$ 118	$ 19