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Investment Securities (Tables) | 9 Months Ended
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Sep. 30, 2017
Investment Securities [Abstract] |
Summary of amortized costs and fair value of investment securities |
|  |  |  |  |  |  | September 30, 2017
|  | Amortized |  | Gross Unrealized |  | Fair
(dollars in thousands) |  | Cost |  | Gains |  | Losses |  | Value
Available for sale |  |  |  |  |  |  |  |  |
US government agencies |  | $ | 8,754 |  | 14 |  | 58 |  | 8,710
SBA securities |  |  | 4,357 |  | - |  | 18 |  | 4,339
State and political subdivisions |  |  | 20,088 |  | 329 |  | 60 |  | 20,357
Mortgage-backed securities |  |  | 45,381 |  | 15 |  | 362 |  | 45,034
Total investment securities available for sale |  | $ | 78,580 |  | 358 |  | 498 |  | 78,440
|  |  |  |  |  |  | December 31, 2016
|  | Amortized |  | Gross Unrealized |  | Fair
|  | Cost |  | Gains |  | Losses |  | Value
Available for sale |  |  |  |  |  |  |  |  |
US government agencies |  | $ | 6,271 |  | 1 |  | 113 |  | 6,159
SBA securities |  |  | 1,453 |  | - |  | 16 |  | 1,437
State and political subdivisions |  |  | 20,625 |  | 141 |  | 292 |  | 20,474
Mortgage-backed securities |  |  | 36,895 |  | 21 |  | 506 |  | 36,410
Total investment securities available for sale |  | $ | 65,244 |  | 163 |  | 927 |  | 64,480
Summary of contractual maturities and yields |
|  | September 30, 2017
|  | Less than one year |  | One to five years |  | Five to ten years |  | Over ten years |  | Total
(dollars in thousands) |  | Amount |  | Yield |  | Amount |  | Yield |  | Amount |  | Yield |  | Amount |  | Yield |  | Amount |  | Yield
Available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
US government agencies |  | $ | 997 |  | 1.15 | % |  | 1,517 |  | 2.04 | % |  | 6,196 |  | 2.39 | % |  | - |  | - |  |  | 8,710 |  | 2.19 | %
SBA securities |  |  | - |  | - |  |  | - |  | - |  |  | - |  | - |  |  | 4,339 |  | 2.48 | % |  | 4,339 |  | 2.48 | %
State and political subdivisions |  |  | - |  | - |  |  | 3,668 |  | 1.64 | % |  | 11,730 |  | 2.44 | % |  | 4,959 |  | 2.88 | % |  | 20,357 |  | 2.40 | %
Mortgage-backed securities |  |  | 790 |  | 1.30 | % |  | - |  | - |  |  | 12,005 |  | 1.80 | % |  | 32,239 |  | 2.04 | % |  | 45,034 |  | 1.97 | %
Total |  | $ | 1,787 |  | 1.21 | % |  | 5,185 |  | 1.59 | % |  | 29,931 |  | 2.18 | % |  | 41,537 |  | 2.23 | % |  | 78,440 |  | 2.13 | %
|  | December 31, 2016
|  | Less than one year |  |  | One to five years |  | Five to ten years |  | Over ten years |  | Total
|  | Amount |  | Yield |  |  | Amount |  | Yield |  | Amount |  | Yield |  | Amount |  | Yield |  | Amount |  | Yield
Available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
US government agencies |  | $ | - |  | - |  |  | 997 |  | 1.15 | % |  | 5,162 |  | 2.23 | % |  | - |  | - |  |  | 6,159 |  | 2.06 | %
SBA securities |  |  | - |  | - |  |  | - |  | - |  |  | - |  | - |  |  | 1,437 |  | 1.32 | % |  | 1,437 |  | 1.32 | %
State and political subdivisions |  |  | - |  | - |  |  | 2,271 |  | 1.73 | % |  | 12,287 |  | 2.35 | % |  | 5,916 |  | 2.77 | % |  | 20,474 |  | 2.40 | %
Mortgage-backed securities |  |  | - |  | - |  |  | - |  | - |  |  | 8,527 |  | 1.64 | % |  | 27,883 |  | 1.68 | % |  | 36,410 |  | 1.67 | %
Total |  | $ | - |  | - |  |  | 3,268 |  | 1.55 | % |  | 25,976 |  | 2.10 | % |  | 35,236 |  | 1.85 | % |  | 64,480 |  | 1.93 | %
Summary of gross unrealized losses on investment securities and fair market value of related securities |
|  | September 30, 2017
|  | Less than 12 months |  | 12 months or longer |  | Total
|  |  |  | Fair |  | Unrealized |  |  |  | Fair |  |  | Unrealized |  |  |  | Fair |  | Unrealized
(dollars in thousands) |  | # |  | value |  | losses |  | # |  | value |  |  | losses |  | # |  | value |  | losses
Available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
US government agencies |  | 6 |  | $ | 5,250 |  | $ | 40 |  | 1 |  | $ | 740 |  |  | $ | 18 |  | 7 |  | $ | 5,990 |  | $ | 58
SBA securities |  | 1 |  |  | 2,937 |  |  | 12 |  | 1 |  |  | 1,402 |  |  |  | 6 |  | 2 |  |  | 4,339 |  |  | 18
State and political subdivisions |  | 8 |  |  | 3,652 |  |  | 12 |  | 6 |  |  | 2,910 |  |  |  | 48 |  | 14 |  |  | 6,562 |  |  | 60
Mortgage-backed securities |  | 25 |  |  | 29,392 |  |  | 230 |  | 8 |  |  | 9,839 |  |  |  | 132 |  | 33 |  |  | 39,231 |  |  | 362
Total |  | 40 |  | $ | 41,231 |  | $ | 294 |  | 16 |  | $ | 14,891 |  |  | $ | 204 |  | 56 |  | $ | 56,122 |  | $ | 498
|  | December 31, 2016
|  | Less than 12 months |  | 12 months or longer |  | Total
|  |  |  | Fair |  | Unrealized |  |  |  | Fair |  |  | Unrealized |  |  |  | Fair |  | Unrealized
|  | # |  | value |  | losses |  | # |  | value |  |  | losses |  | # |  | value |  | losses
Available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
US government agencies |  | 5 |  | $ | 5,144 |  | $ | 113 |  | - |  | $ | - |  |  | $ | - |  | 5 |  | $ | 5,144 |  | $ | 113
SBA securities |  | 1 |  |  | 1,437 |  |  | 16 |  | - |  |  | - |  |  |  | - |  | 1 |  |  | 1,437 |  |  | 16
State and political subdivisions |  | 32 |  |  | 13,936 |  |  | 292 |  | - |  |  | - |  |  |  | - |  | 32 |  |  | 13,936 |  |  | 292
Mortgage-backed securities |  | 25 |  |  | 27,292 |  |  | 476 |  | 2 |  |  | 3,991 |  |  |  | 30 |  | 27 |  |  | 31,283 |  |  | 506
Total |  | 63 |  | $ | 47,809 |  | $ | 897 |  | 2 |  | $ | 3,991 |  |  | $ | 30 |  | 65 |  | $ | 51,800 |  | $ | 927
Summary of other investments |
(dollars in thousands) |  | September 30, 2017 |  | December 31, 2016
Federal Home Loan Bank stock |  | $ | 2,479 |  | 5,173
Investment in Trust Preferred securities |  |  | 403 |  | 403
Other investments |  |  | 182 |  | 166
Total other investments |  | $ | 3,064 |  | 5,742

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