Loans - Past Due Status (Details) - USD ($) $ in Thousands	Dec. 31, 2017		Dec. 31, 2016
Loans on nonaccrual status
Total Past Due	$ 22,759		$ 25,456
PCI	3,103		9,256
Current	1,001,926	[1]	965,028
Total Loans	1,027,788		999,740
90+ days past due and accruing	306		6
Additional disclosure for nonaccrual loans
Current, nonaccrual status	890,000,000		3,040
Nonaccrual loans, 30-59 days past due	458		570
Nonaccrual loans, 60-89 days past due	14		370
Nonaccrual loans, 90+ days past due	4,700		1,520
30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	15,663		20,353
60-89 Days Past Due
Loans on nonaccrual status
Total Past Due	2,075		3,586
90+ Days Past Due
Loans on nonaccrual status
Total Past Due	5,021		1,517
Real estate - residential mortgage
Loans on nonaccrual status
Total Past Due	2,164		1,265
PCI	492		1,219
Current	182,207	[1]	185,780
Total Loans	184,863		188,264
90+ days past due and accruing	90
Real estate - residential mortgage | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	1,905		848
Real estate - residential mortgage | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due	14		233
Real estate - residential mortgage | 90+ Days Past Due
Loans on nonaccrual status
Total Past Due	245		184
Equity lines
Loans on nonaccrual status
Total Past Due	686		991
PCI	139		278
Current	54,412	[1]	51,331
Total Loans	55,237		52,600
90+ days past due and accruing	136
Equity lines | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	550		853
Equity lines | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due			138
Equity lines | 90+ Days Past Due
Loans on nonaccrual status
Total Past Due	136
Consumer Loan
Loans on nonaccrual status
Total Past Due	9		140
Current	13,009	[1]	8,259
Total Loans	13,018		8,399
90+ days past due and accruing			6
Consumer Loan | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	9		22
Consumer Loan | 90+ Days Past Due
Loans on nonaccrual status
Total Past Due			118
Consumer Finance
Loans on nonaccrual status
Total Past Due	15,098		17,852
Current	276,906	[1]	286,505
Total Loans	292,004		304,357
Consumer Finance | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	12,273		13,434
Consumer Finance | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due	2,061		3,203
Consumer Finance | 90+ Days Past Due
Loans on nonaccrual status
Total Past Due	764		1,215
Construction Lending | Real estate - construction
Loans on nonaccrual status
Current	41,449	[1]	47,062
Total Loans	41,449		47,062
Consumer lot lending | Real estate - construction
Loans on nonaccrual status
Current	3,333	[1]	8,670
Total Loans	3,333		8,670
Commercial real estate lending | Commercial, financial and agricultural
Loans on nonaccrual status
Total Past Due	4,115		5,133
PCI	2,472		7,245
Current	297,903	[1]	249,408
Total Loans	304,490		261,786
90+ days past due and accruing	78
Commercial real estate lending | Commercial, financial and agricultural | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	241		5,121
Commercial real estate lending | Commercial, financial and agricultural | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due			12
Commercial real estate lending | Commercial, financial and agricultural | 90+ Days Past Due
Loans on nonaccrual status
Total Past Due	3,874
Land acquisition and development lending | Commercial, financial and agricultural
Loans on nonaccrual status
Current	39,844	[1]	43,472
Total Loans	39,844		43,472
Builder line lending | Commercial, financial and agricultural
Loans on nonaccrual status
Total Past Due	685
Current	28,911	[1]	22,391
Total Loans	29,596		22,391
Builder line lending | Commercial, financial and agricultural | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	685
Commercial business lending | Commercial, financial and agricultural
Loans on nonaccrual status
Total Past Due	2		75
PCI			514
Current	63,952	[1]	62,150
Total Loans	63,954		62,739
90+ days past due and accruing	2
Commercial business lending | Commercial, financial and agricultural | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due			75
Commercial business lending | Commercial, financial and agricultural | 90+ Days Past Due
Loans on nonaccrual status
Total Past Due	2
CVBK
Loans on nonaccrual status
Current	42,530		52,640
CVBK | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	137		532
CVBK | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due	14		143
CVBK | 90+ Days Past Due
Loans on nonaccrual status
Total Past Due	115		17
PCI Loans
Loans on nonaccrual status
90+ days past due and accruing	90
PCI Loans | CVBK | PCI
Loans on nonaccrual status
PCI	$ 3,103		$ 9,256

[1] For the purposes of the table above, “Current” includes loans that are 1-29 days past due.Includes purchased credit impaired (PCI) loans of $90,000.