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2. Investment Securities (Tables) | 6 Months Ended
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Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract] |
Investment securities available for sale |
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |
|  | June 30, 2018 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Mortgage-backed securities |  | $ | 46,213 |  |  |  | 321 |  |  |  | 813 |  |  |  | 45,721 |
U.S. Government |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
sponsored enterprises |  |  | 38,528 |  |  |  | 10 |  |  |  | 1,001 |  |  |  | 37,537 |
State and political subdivisions |  |  | 122,930 |  |  |  | 2,749 |  |  |  | 144 |  |  |  | 125,535 |
Corporate bonds |  |  | 1,000 |  |  |  | 12 |  |  |  | - |  |  |  | 1,012 |
Trust preferred securities |  |  | 250 |  |  |  | - |  |  |  | - |  |  |  | 250 |
Total |  | $ | 208,921 |  |  |  | 3,092 |  |  |  | 1,958 |  |  |  | 210,055 |
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |
|  | December 31, 2017 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Mortgage-backed securities |  | $ | 53,124 |  |  |  | 814 |  |  |  | 329 |  |  |  | 53,609 |
U.S. Government |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
sponsored enterprises |  |  | 40,504 |  |  |  | 140 |  |  |  | 264 |  |  |  | 40,380 |
State and political subdivisions |  |  | 129,276 |  |  |  | 4,310 |  |  |  | 16 |  |  |  | 133,570 |
Corporate bonds |  |  | 1,500 |  |  |  | 12 |  |  |  | - |  |  |  | 1,512 |
Trust preferred securities |  |  | 250 |  |  |  | - |  |  |  | - |  |  |  | 250 |
Total |  | $ | 224,654 |  |  |  | 5,276 |  |  |  | 609 |  |  |  | 229,321 |
Current fair value and associated unrealized losses on investments in securities with unrealized losses |
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | June 30, 2018 |
|  | Less than 12 Months |  |  | 12 Months or More |  |  | Total |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
Mortgage-backed securities |  | $ | 18,692 |  |  |  | 255 |  |  |  | 11,373 |  |  |  | 558 |  |  |  | 30,065 |  |  |  | 813 |
U.S. Government |  |  |  |  |  |  | - |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
sponsored enterprises |  |  | 26,635 |  |  |  | 663 |  |  |  | 9,891 |  |  |  | 338 |  |  |  | 36,526 |  |  |  | 1,001 |
State and political subdivisions |  |  | 9,760 |  |  |  | 117 |  |  |  | 964 |  |  |  | 27 |  |  |  | 10,724 |  |  |  | 144 |
Total |  | $ | 55,087 |  |  |  | 1,035 |  |  |  | 22,228 |  |  |  | 923 |  |  |  | 77,315 |  |  |  | 1,958 |
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | December 31, 2017 |
|  | Less than 12 Months |  |  | 12 Months or More |  |  | Total |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
Mortgage-backed securities |  | $ | 8,701 |  |  |  | 75 |  |  |  | 11,259 |  |  |  | 254 |  |  |  | 19,960 |  |  |  | 329 |
U.S. Government |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
sponsored enterprises |  |  | 12,661 |  |  |  | 98 |  |  |  | 10,067 |  |  |  | 166 |  |  |  | 22,728 |  |  |  | 264 |
State and political subdivisions |  |  | 798 |  |  |  | 2 |  |  |  | 1,501 |  |  |  | 14 |  |  |  | 2,299 |  |  |  | 16 |
Total |  | $ | 22,160 |  |  |  | 175 |  |  |  | 22,827 |  |  |  | 434 |  |  |  | 44,987 |  |  |  | 609 |
Amortized cost and estimated fair value of investment securities available for sale by contractual maturity |
June 30, 2018 |  |  |  |  |  |
(Dollars in thousands) |  |  |  |  |  |
|  | Amortized Cost |  |  | Estimated Fair Value |
Due within one year |  | $ | 22,613 |  |  |  | 22,809 |
Due from one to five years |  |  | 97,045 |  |  |  | 98,725 |
Due from five to ten years |  |  | 37,351 |  |  |  | 37,068 |
Due after ten years |  |  | 5,449 |  |  |  | 5,482 |
Mortgage-backed securities |  |  | 46,213 |  |  |  | 45,721 |
Trust preferred securities |  |  | 250 |  |  |  | 250 |
Total |  | $ | 208,921 |  |  |  | 210,055 |

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- Definition Tabular disclosure of fair value of investments in debt and equity securities in an unrealized loss position categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References No definition available. + Details
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- Definition Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 + Details
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