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Securities (Summary of Book Values and Fair Values of Investment Securities) (Details) - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014 | Sep. 30, 2014
--- | --- | --- | ---
Securities available for sale: |  |  |
Amortized Cost | $ 179,608 | $ 158,708 |
Fair Value | 178,765 | 158,018 | $ 153,238
Unrealized Gains | 647 | 830 |
Unrealized (Losses) | (1,490) | (1,520) |
Securities held to maturity: |  |  |
Amortized Cost | 160,048 | 178,687 | 53,821
Fair Value | 162,858 | 182,411 | $ 57,601
Unrealized Gains | 3,258 | 3,832 |
Unrealized (Losses) | (448) | (108) |
Government-sponsored enterprises securities [Member] |  |  |
Securities available for sale: |  |  |
Amortized Cost | 27,789 | 27,546 |
Fair Value | 27,850 | 27,521 |
Unrealized Gains | 69 | 33 |
Unrealized (Losses) | (8) | (58) |
Mortgage-backed securities [Member] |  |  |
Securities available for sale: |  |  |
Amortized Cost | 126,508 | 130,073 |
Fair Value | 125,836 | 129,510 |
Unrealized Gains | 520 | 751 |
Unrealized (Losses) | (1,192) | (1,314) |
Securities held to maturity: |  |  |
Amortized Cost | 107,787 | 124,924 |
Fair Value | $ 107,360 | 124,861 |
Unrealized Gains |  | 45 |
Unrealized (Losses) | $ (427) | (108) |
Corporate bonds [Member] |  |  |
Securities available for sale: |  |  |
Amortized Cost | 25,223 | 1,000 |
Fair Value | 24,948 | $ 865 |
Unrealized Gains | 4 |  |
Unrealized (Losses) | (279) | $ (135) |
Equity securities [Member] |  |  |
Securities available for sale: |  |  |
Amortized Cost | 88 | 89 |
Fair Value | 131 | 122 |
Unrealized Gains | 54 | 46 |
Unrealized (Losses) | (11) | (13) |
States and local governments [Member] |  |  |
Securities held to maturity: |  |  |
Amortized Cost | 52,261 | 53,763 |
Fair Value | 55,498 | 57,550 |
Unrealized Gains | 3,258 | $ 3,787 |
Unrealized (Losses) | $ (21) |  |

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