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Securities (Tables) | 12 Months Ended
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Dec. 31, 2015
Securities [Abstract] |
Book values and approximate fair values of investment securities |
|  | 2015 |  | 2014
|  | Amortized |  | Fair |  | Unrealized |  | Amortized |  | Fair |  | Unrealized
($ in thousands) |  | Cost |  | Value |  | Gains |  | (Losses) |  | Cost |  | Value |  | Gains |  | (Losses)
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Government-sponsored enterprise securities |  | $ | 19,000 |  |  | 18,972 |  |  | 1 |  |  | (29) |  |  | 27,546 |  |  | 27,521 |  |  | 33 |  |  | (58)
Mortgage-backed securities |  |  | 122,474 |  |  | 121,553 |  |  | 348 |  |  | (1,269) |  |  | 130,073 |  |  | 129,510 |  |  | 751 |  |  | (1,314)
Corporate bonds |  |  | 25,216 |  |  | 24,946 |  |  | — |  |  | (270) |  |  | 1,000 |  |  | 865 |  |  | — |  |  | (135)
Equity securities |  |  | 88 |  |  | 143 |  |  | 64 |  |  | (9) |  |  | 89 |  |  | 122 |  |  | 46 |  |  | (13)
Total available for sale |  | $ | 166,778 |  |  | 165,614 |  |  | 413 |  |  | (1,577) |  |  | 158,708 |  |  | 158,018 |  |  | 830 |  |  | (1,520)
Securities held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  | $ | 102,509 |  |  | 101,767 |  |  | — |  |  | (742) |  |  | 124,924 |  |  | 124,861 |  |  | 45 |  |  | (108)
State and local governments |  |  | 52,101 |  |  | 55,379 |  |  | 3,284 |  |  | 6 |  |  | 53,763 |  |  | 57,550 |  |  | 3,787 |  |  | —
Total held to maturity |  | $ | 154,610 |  |  | 157,146 |  |  | 3,284 |  |  | (748) |  |  | 178,687 |  |  | 182,411 |  |  | 3,832 |  |  | (108)
Schedule of information regarding securities with unrealized losses |
($ in thousands) |  | Securities in an Unrealized Loss Position for Less than 12 Months |  | Securities in an Unrealized Loss Position for More than 12 Months |  | Total
|  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
Government-sponsored enterprise securities |  | $ | 5,993 |  |  | 7 |  |  | 2,978 |  |  | 22 |  |  | 8,971 |  |  | 29
Mortgage-backed securities |  |  | 150,853 |  |  | 1,148 |  |  | 27,460 |  |  | 863 |  |  | 178,313 |  |  | 2,011
Corporate bonds |  |  | 24,006 |  |  | 210 |  |  | 940 |  |  | 60 |  |  | 24,946 |  |  | 270
Equity securities |  |  | — |  |  | — |  |  | 17 |  |  | 9 |  |  | 17 |  |  | 9
State and local governments |  |  | 840 |  |  | 6 |  |  | — |  |  | — |  |  | 840 |  |  | 6
Total temporarily impaired securities |  | $ | 181,692 |  |  | 1,371 |  |  | 31,395 |  |  | 954 |  |  | 213,087 |  |  | 2,325
($ in thousands) |  | Securities in an Unrealized Loss Position for Less than 12 Months |  | Securities in an Unrealized Loss Position for More than 12 Months |  | Total
|  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
Government-sponsored enterprise securities |  | $ | 5,489 |  |  | 11 |  |  | 2,953 |  |  | 47 |  |  | 8,442 |  |  | 58
Mortgage-backed securities |  |  | 69,985 |  |  | 318 |  |  | 33,557 |  |  | 1,104 |  |  | 103,542 |  |  | 1,422
Corporate bonds |  |  | — |  |  | — |  |  | 865 |  |  | 135 |  |  | 865 |  |  | 135
Equity securities |  |  | — |  |  | — |  |  | 17 |  |  | 13 |  |  | 17 |  |  | 13
State and local governments |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | —
Total temporarily impaired securities |  | $ | 75,474 |  |  | 329 |  |  | 37,392 |  |  | 1,299 |  |  | 112,866 |  |  | 1,628
Schedule of book values and approximate fair values of investment securities by contractual maturity |
|  | Securities Available for Sale |  | Securities Held to Maturity
|  | Amortized |  | Fair |  | Amortized |  | Fair
($ in thousands) |  | Cost |  | Value |  | Cost |  | Value
Debt securities |  |  |  |  |  |  |  |
Due within one year |  | $ | — |  |  | — |  | $ | 835 |  |  | 839
Due after one year but within five years |  |  | 19,000 |  |  | 18,972 |  |  | 12,549 |  |  | 13,190
Due after five years but within ten years |  |  | 20,216 |  |  | 20,026 |  |  | 37,286 |  |  | 39,919
Due after ten years |  |  | 5,000 |  |  | 4,920 |  |  | 1,431 |  |  | 1,431
Mortgage-backed securities |  |  | 122,474 |  |  | 121,553 |  |  | 102,509 |  |  | 101,767
Total debt securities |  |  | 166,690 |  |  | 165,471 |  |  | 154,610 |  |  | 157,146
Equity securities |  |  | 88 |  |  | 143 |  |  | — |  |  | —
Total securities |  | $ | 166,778 |  |  | 165,614 |  | $ | 154,610 |  |  | 157,146

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