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Note 3 - Loans - PCI loans (Details) - Financial Asset Acquired with Credit Deterioration [Member] - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
PCI loans, recorded investment $ 16,181 $ 18,440
PCI loans, unpaid principal balance 34,858 40,458
Peoples Bank of Virginia [Member]    
PCI loans, recorded investment 5,443 5,278
PCI loans, unpaid principal balance 7,772 8,111
Waccamaw Bank [Member]    
PCI loans, recorded investment 9,815 12,176
PCI loans, unpaid principal balance 26,137 31,335
Other Receivables [Member]    
PCI loans, recorded investment 923 986
PCI loans, unpaid principal balance $ 949 $ 1,012