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Note 6 - Allowance for Loan Losses - Allowance for Loan Losses on PCI Loans and Recorded Investment (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Acquired impaired loans evaluated for impairment | $ 61,247 | $ 12,003
Allowance for acquired impaired loans |  |
Commercial Portfolio Segment [Member] |  |
Acquired impaired loans evaluated for impairment | 41,167 | 5,273
Allowance for acquired impaired loans |  |
Commercial Portfolio Segment [Member] | Waccamaw Commercial [Member] |  |
Acquired impaired loans evaluated for impairment |  |
Allowance for acquired impaired loans |  |
Commercial Portfolio Segment [Member] | Peoples Commercial [Member] |  |
Acquired impaired loans evaluated for impairment | 4,371 | 4,405
Allowance for acquired impaired loans |  |
Commercial Portfolio Segment [Member] | 1-4 family, Senior-commercial [Member] |  |
Acquired impaired loans evaluated for impairment | 4,564 |
Allowance for acquired impaired loans |  |
Commercial Portfolio Segment [Member] | Construction and Land Development [Member] |  |
Acquired impaired loans evaluated for impairment | 1,956 |
Allowance for acquired impaired loans |  |
Commercial Portfolio Segment [Member] | Farmland and Other Agricultural [Member] |  |
Acquired impaired loans evaluated for impairment | 3,722 |
Allowance for acquired impaired loans |  |
Commercial Portfolio Segment [Member] | Multifamily [Member] |  |
Acquired impaired loans evaluated for impairment | 1,663 |
Allowance for acquired impaired loans |  |
Commercial Portfolio Segment [Member] | Commercial Real Estate-owner Occupied [Member] |  |
Acquired impaired loans evaluated for impairment | 13,024 |
Allowance for acquired impaired loans |  |
Commercial Portfolio Segment [Member] | Commercial Real Estate Non-owner Occupied [Member] |  |
Acquired impaired loans evaluated for impairment | 8,686 |
Allowance for acquired impaired loans |  |
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] |  |
Acquired impaired loans evaluated for impairment | 2,829 |
Allowance for acquired impaired loans |  |
Commercial Portfolio Segment [Member] | Other Commercial Loan [Member] |  |
Acquired impaired loans evaluated for impairment | 352 | 868
Allowance for acquired impaired loans |  |
Consumer Real Estate Portfolio Segment [Member] |  |
Acquired impaired loans evaluated for impairment | 20,080 | 6,730
Allowance for acquired impaired loans |  |
Consumer Real Estate Portfolio Segment [Member] | Waccamaw Serviced Home Equity Lines [Member] |  |
Acquired impaired loans evaluated for impairment | 2,121 | 5,017
Allowance for acquired impaired loans |  |
Consumer Real Estate Portfolio Segment [Member] | Waccamaw Residential [Member] |  |
Acquired impaired loans evaluated for impairment | 587 | 788
Allowance for acquired impaired loans |  |
Consumer Real Estate Portfolio Segment [Member] | 1-4 Family, Junior and HELOCS [Member] |  |
Acquired impaired loans evaluated for impairment | 2,157 |
Allowance for acquired impaired loans |  |
Consumer Real Estate Portfolio Segment [Member] | 1-4 Family, Senior-consumer [Member] |  |
Acquired impaired loans evaluated for impairment | 13,174 |
Allowance for acquired impaired loans |  |
Consumer Real Estate Portfolio Segment [Member] | Consumer Loan [Member] |  |
Acquired impaired loans evaluated for impairment | 1,341 |
Allowance for acquired impaired loans |  |
Consumer Real Estate Portfolio Segment [Member] | Peoples Residential [Member] |  |
Acquired impaired loans evaluated for impairment | 700 | 925
Allowance for acquired impaired loans |  |

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