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Note 5 - Allowance for Loan Losses - Allowance for Loan Losses on PCI Loans and Recorded Investment in Loans (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Acquired Impaired Loans Evaluated for Impairment $ 25,558 $ 28,429
Allowance for Acquired Impaired Loans Evaluated 12 12
Commercial Portfolio Segment [Member]    
Acquired Impaired Loans Evaluated for Impairment 5,279 5,846
Allowance for Acquired Impaired Loans Evaluated
Commercial Portfolio Segment [Member] | Waccamaw Commercial [Member]    
Acquired Impaired Loans Evaluated for Impairment 194 260
Allowance for Acquired Impaired Loans Evaluated
Commercial Portfolio Segment [Member] | Peoples Commercial [Member]    
Acquired Impaired Loans Evaluated for Impairment 4,014 4,491
Allowance for Acquired Impaired Loans Evaluated
Commercial Portfolio Segment [Member] | Other Commercial Loan [Member]    
Acquired Impaired Loans Evaluated for Impairment 1,071 1,095
Allowance for Acquired Impaired Loans Evaluated
Consumer Real Estate Portfolio Segment [Member]    
Acquired Impaired Loans Evaluated for Impairment 20,279 22,583
Allowance for Acquired Impaired Loans Evaluated 12 12
Consumer Real Estate Portfolio Segment [Member] | Waccamaw Serviced Home Equity Lines [Member]    
Acquired Impaired Loans Evaluated for Impairment 18,001 20,178
Allowance for Acquired Impaired Loans Evaluated
Consumer Real Estate Portfolio Segment [Member] | Waccamaw Residential [Member]    
Acquired Impaired Loans Evaluated for Impairment 1,214 1,320
Allowance for Acquired Impaired Loans Evaluated
Consumer Real Estate Portfolio Segment [Member] | Peoples Residential [Member]    
Acquired Impaired Loans Evaluated for Impairment 1,064 1,085
Allowance for Acquired Impaired Loans Evaluated $ 12 $ 12