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Note 5 - Allowance for Loan Losses - Allowance for Loan Losses on PCI Loans and Recorded Investment (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Acquired impaired loans evaluated for impairment | $ 21,093 | $ 28,429
Allowance for acquired impaired loans |  | 12
Commercial Portfolio Segment [Member] |  |
Acquired impaired loans evaluated for impairment | 5,622 | 5,846
Allowance for acquired impaired loans |  |
Commercial Portfolio Segment [Member] | Waccamaw Commercial [Member] |  |
Acquired impaired loans evaluated for impairment | 452 | 260
Allowance for acquired impaired loans |  |
Commercial Portfolio Segment [Member] | Peoples Commercial [Member] |  |
Acquired impaired loans evaluated for impairment | 4,159 | 4,491
Allowance for acquired impaired loans |  |
Commercial Portfolio Segment [Member] | Other Commercial Loan [Member] |  |
Acquired impaired loans evaluated for impairment | 1,011 | 1,095
Allowance for acquired impaired loans |  |
Consumer Real Estate Portfolio Segment [Member] |  |
Acquired impaired loans evaluated for impairment | 15,471 | 22,583
Allowance for acquired impaired loans |  | 12
Consumer Real Estate Portfolio Segment [Member] | Waccamaw Serviced Home Equity Lines [Member] |  |
Acquired impaired loans evaluated for impairment | 13,270 | 20,178
Allowance for acquired impaired loans |  |
Consumer Real Estate Portfolio Segment [Member] | Waccamaw Residential [Member] |  |
Acquired impaired loans evaluated for impairment | 1,181 | 1,320
Allowance for acquired impaired loans |  |
Consumer Real Estate Portfolio Segment [Member] | Peoples Residential [Member] |  |
Acquired impaired loans evaluated for impairment | 1,020 | 1,085
Allowance for acquired impaired loans |  | $ 12

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