Loans - Past Due Status (Details) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Loans on nonaccrual status
Total Past Due	$ 20,794,000	$ 23,155,000
Current	966,032,000	964,817,000
Total Loans	993,568,000	997,228,000
90+ days past due and accruing	211,000	6,000
Additional disclosure for nonaccrual loans
Current, nonaccrual status	3,180,000	3,040,000
Nonaccrual loans, 30-59 days past due	103,000	570,000
Nonaccrual loans, 60-89 days past due	4,820,000	370,000
Nonaccrual loans, 90+ days past due	1,000,000	867,000
PCI
Loans on nonaccrual status
PCI	6,742,000	9,256,000
30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	11,976,000	19,930,000
60-89 Days Past Due
Loans on nonaccrual status
Total Past Due	7,616,000	2,358,000
90+ Days Past Due
Loans on nonaccrual status
Total Past Due	1,202,000	867,000
Real estate - residential mortgage
Loans on nonaccrual status
Total Past Due	1,745,000	1,265,000
Current	184,057,000	185,780,000
Total Loans	186,952,000	188,264,000
90+ days past due and accruing	201,000
Real estate - residential mortgage | PCI
Loans on nonaccrual status
PCI	1,150,000	1,219,000
Real estate - residential mortgage | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	916,000	848,000
Real estate - residential mortgage | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due	126,000	233,000
Real estate - residential mortgage | 90+ Days Past Due
Loans on nonaccrual status
Total Past Due	703,000	184,000
Equity lines
Loans on nonaccrual status
Total Past Due	165,000	991,000
Current	52,458,000	51,331,000
Total Loans	52,893,000	52,600,000
Equity lines | PCI
Loans on nonaccrual status
PCI	270,000	278,000
Equity lines | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	140,000	853,000
Equity lines | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due	25,000	138,000
Consumer Loan
Loans on nonaccrual status
Total Past Due	79,000	140,000
Current	12,255,000	8,259,000
Total Loans	12,334,000	8,399,000
90+ days past due and accruing	10,000	6,000
Consumer Loan | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	75,000	22,000
Consumer Loan | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due	2,000
Consumer Loan | 90+ Days Past Due
Loans on nonaccrual status
Total Past Due	2,000	118,000
Consumer Finance
Loans on nonaccrual status
Total Past Due	12,809,000	15,551,000
Current	278,448,000	286,294,000
Total Loans	291,257,000	301,845,000
Consumer Finance | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	10,501,000	13,011,000
Consumer Finance | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due	1,811,000	1,975,000
Consumer Finance | 90+ Days Past Due
Loans on nonaccrual status
Total Past Due	497,000	565,000
Construction Lending | Real estate - construction
Loans on nonaccrual status
Current	29,095,000	47,062,000
Total Loans	29,095,000	47,062,000
Consumer lot lending | Real estate - construction
Loans on nonaccrual status
Current	5,588,000	8,670,000
Total Loans	5,588,000	8,670,000
Commercial real estate lending | Commercial, financial and agricultural
Loans on nonaccrual status
Total Past Due	5,874,000	5,133,000
Current	278,037,000	249,408,000
Total Loans	289,233,000	261,786,000
Commercial real estate lending | Commercial, financial and agricultural | PCI
Loans on nonaccrual status
PCI	5,322,000	7,245,000
Commercial real estate lending | Commercial, financial and agricultural | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	274,000	5,121,000
Commercial real estate lending | Commercial, financial and agricultural | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due	5,600,000	12,000
Land acquisition and development lending | Commercial, financial and agricultural
Loans on nonaccrual status
Current	40,546,000	43,472,000
Total Loans	40,546,000	43,472,000
Builder line lending | Commercial, financial and agricultural
Loans on nonaccrual status
Current	26,368,000	22,391,000
Total Loans	26,368,000	22,391,000
Commercial business lending | Commercial, financial and agricultural
Loans on nonaccrual status
Total Past Due	122,000	75,000
Current	59,180,000	62,150,000
Total Loans	59,302,000	62,739,000
Commercial business lending | Commercial, financial and agricultural | PCI
Loans on nonaccrual status
PCI		514,000
Commercial business lending | Commercial, financial and agricultural | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	70,000	75,000
Commercial business lending | Commercial, financial and agricultural | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due	52,000
CVBK | 1-29 Days Past Due
Loans on nonaccrual status
Total Past Due	49,300,000	52,640,000
CVBK | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	56,000	532,000
CVBK | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due	125,000	143,000
CVBK | 90+ Days Past Due
Loans on nonaccrual status
Total Past Due		$ 17,000
PCI Loans
Loans on nonaccrual status
90+ days past due and accruing	$ 188,000