Loans - Loans Acquired (Details) - CVBK - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Loans
Outstanding principal balance	$ 57,939	$ 75,983
Carrying amount
Acquired Loans	45,896	62,585
Real estate - residential mortgage
Carrying amount
Acquired Loans	11,347	14,641
Commercial, financial and agricultural
Carrying amount
Acquired Loans	24,777	36,374
Equity lines
Carrying amount
Acquired Loans	9,760	11,456
Consumer Loan
Carrying amount
Acquired Loans	12	114
PCI Loans
Loans
Outstanding principal balance	12,856	19,770
Carrying amount
Acquired Loans	3,103	9,256
PCI Loans | Real estate - residential mortgage
Carrying amount
Acquired Loans	492	1,219
PCI Loans | Commercial, financial and agricultural
Carrying amount
Acquired Loans	2,472	7,759
PCI Loans | Equity lines
Carrying amount
Acquired Loans	139	278
Purchased Performing Loans
Loans
Outstanding principal balance	45,083	56,213
Carrying amount
Acquired Loans	42,793	53,329
Purchased Performing Loans | Real estate - residential mortgage
Carrying amount
Acquired Loans	10,855	13,422
Purchased Performing Loans | Commercial, financial and agricultural
Carrying amount
Acquired Loans	22,305	28,615
Purchased Performing Loans | Equity lines
Carrying amount
Acquired Loans	9,621	11,178
Purchased Performing Loans | Consumer Loan
Carrying amount
Acquired Loans	$ 12	$ 114