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Note 3 - Loans - PCI loans (Details) - Financial Asset Acquired with Credit Deterioration [Member] - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
PCI loans, recorded investment $ 13,673 $ 18,440
PCI loans, unpaid principal balance 31,401 40,458
Peoples Bank of Virginia [Member]    
PCI loans, recorded investment 5,420 5,278
PCI loans, unpaid principal balance 7,546 8,111
Waccamaw Bank [Member]    
PCI loans, recorded investment 7,354 12,176
PCI loans, unpaid principal balance 22,930 31,335
Other Receivables [Member]    
PCI loans, recorded investment 899 986
PCI loans, unpaid principal balance $ 925 $ 1,012