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2. Investment Securities (Tables) | 9 Months Ended
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Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract] |
Investment securities available for sale |
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |
|  | September 30, 2015
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value
Mortgage-backed securities |  | $ | 75,386 |  |  |  | 2,098 |  |  |  | 18 |  |  |  | 77,466
U.S. Government |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
sponsored enterprises |  |  | 38,793 |  |  |  | 505 |  |  |  | 129 |  |  |  | 39,169
State and political subdivisions |  |  | 143,094 |  |  |  | 5,566 |  |  |  | 338 |  |  |  | 148,322
Corporate bonds |  |  | 1,937 |  |  |  | 4 |  |  |  | 1 |  |  |  | 1,940
Trust preferred securities |  |  | 750 |  |  |  | - |  |  |  | - |  |  |  | 750
Equity securities |  |  | 748 |  |  |  | 426 |  |  |  | - |  |  |  | 1,174
Total |  | $ | 260,708 |  |  |  | 8,599 |  |  |  | 486 |  |  |  | 268,821
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | December 31, 2014
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value
Mortgage-backed securities |  | $ | 88,496 |  |  |  | 1,766 |  |  |  | 52 |  |  |  | 90,210
U.S. Government |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
sponsored enterprises |  |  | 33,766 |  |  |  | 418 |  |  |  | 136 |  |  |  | 34,048
State and political subdivisions |  |  | 145,938 |  |  |  | 6,534 |  |  |  | 226 |  |  |  | 152,246
Corporate bonds |  |  | 2,469 |  |  |  | 16 |  |  |  | 18 |  |  |  | 2,467
Trust preferred securities |  |  | 750 |  |  |  | - |  |  |  | - |  |  |  | 750
Equity securities |  |  | 748 |  |  |  | 630 |  |  |  | - |  |  |  | 1,378
Total |  | $ | 272,167 |  |  |  | 9,364 |  |  |  | 432 |  |  |  | 281,099
Current fair value and associated unrealized losses on investments in securities with unrealized losses |
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | September 30, 2015
|  | Less than 12 Months |  |  | 12 Months or More |  |  | Total
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses
Mortgage-backed securities |  | $ | 2,278 |  |  |  | 18 |  |  |  | - |  |  |  | - |  |  |  | 2,278 |  |  |  | 18
U.S. Government |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
sponsored enterprises |  |  | 2,319 |  |  |  | 20 |  |  |  | 9,064 |  |  |  | 109 |  |  |  | 11,383 |  |  |  | 129
State and political subdivisions |  |  | 15,762 |  |  |  | 170 |  |  |  | 6,668 |  |  |  | 168 |  |  |  | 22,430 |  |  |  | 338
Corporate bonds |  |  | - |  |  |  | - |  |  |  | 526 |  |  |  | 1 |  |  |  | 526 |  |  |  | 1
Total |  | $ | 20,359 |  |  |  | 208 |  |  |  | 16,258 |  |  |  | 278 |  |  |  | 36,617 |  |  |  | 486
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | December 31, 2014
|  | Less than 12 Months |  |  | 12 Months or More |  |  | Total
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses
Mortgage-backed securities |  | $ | 436 |  |  |  | 1 |  |  |  | 2,963 |  |  |  | 51 |  |  |  | 3,399 |  |  |  | 52
U.S. Government |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
sponsored enterprises |  |  | 2,996 |  |  |  | 4 |  |  |  | 9,850 |  |  |  | 132 |  |  |  | 12,846 |  |  |  | 136
State and political subdivisions |  |  | 567 |  |  |  | 1 |  |  |  | 14,998 |  |  |  | 225 |  |  |  | 15,565 |  |  |  | 226
Corporate bonds |  |  | - |  |  |  | - |  |  |  | 525 |  |  |  | 18 |  |  |  | 525 |  |  |  | 18
Total |  | $ | 3,999 |  |  |  | 6 |  |  |  | 28,336 |  |  |  | 426 |  |  |  | 32,335 |  |  |  | 432
Amortized cost and estimated fair value of investment securities available for sale by contractual maturity |
September 30, 2015 |  |  |
(Dollars in thousands) |  |  |
| Amortized Cost |  | Estimated Fair Value
Due within one year | $ | 4,431 |  | 4,440
Due from one to five years |  | 57,499 |  | 60,100
Due from five to ten years |  | 107,022 |  | 109,524
Due after ten years |  | 15,622 |  | 16,117
Mortgage-backed securities |  | 75,386 |  | 77,466
Equity securities |  | 748 |  | 1,174
Total | $ | 260,708 |  | 268,821

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