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Securities (Tables) | 12 Months Ended
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Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract] |
Summary of Amortized Costs and Fair Values of Securities | Amortized costs and fair values of securities at December 31, 2016 and 2015 were as follows (in thousands):
|  | 2016 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized (Losses) |  |  | Fair Value |
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. agency and mortgage-backed securities |  | $ | 81,451 |  |  | $ | 177 |  |  | $ | (1,457 | ) |  | $ | 80,171 |
Obligations of states and political subdivisions |  |  | 14,654 |  |  |  | 146 |  |  |  | (180 | ) |  |  | 14,620 |
Corporate equity securities |  |  | 1 |  |  |  | 10 |  |  |  | — |  |  |  | 11 |
Total securities available for sale |  | $ | 96,106 |  |  | $ | 333 |  |  | $ | (1,637 | ) |  | $ | 94,802 |
Securities held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. agency and mortgage-backed securities |  | $ | 37,269 |  |  | $ | 1 |  |  | $ | (483 | ) |  | $ | 36,787 |
Obligations of states and political subdivisions |  |  | 14,629 |  |  |  | 18 |  |  |  | (211 | ) |  |  | 14,436 |
Corporate debt securities |  |  | 1,500 |  |  |  | — |  |  |  | (14 | ) |  |  | 1,486 |
Total securities held to maturity |  | $ | 53,398 |  |  | $ | 19 |  |  | $ | (708 | ) |  | $ | 52,709 |
Total securities |  | $ | 149,504 |  |  | $ | 352 |  |  | $ | (2,345 | ) |  | $ | 147,511 |
|  | 2015 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized (Losses) |  |  | Fair Value |
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. agency and mortgage-backed securities |  | $ | 89,919 |  |  | $ | 261 |  |  | $ | (843 | ) |  | $ | 89,337 |
Obligations of states and political subdivisions |  |  | 15,931 |  |  |  | 333 |  |  |  | (50 | ) |  |  | 16,214 |
Corporate equity securities |  |  | 1 |  |  |  | 7 |  |  |  | — |  |  |  | 8 |
Total securities available for sale |  | $ | 105,851 |  |  | $ | 601 |  |  | $ | (893 | ) |  | $ | 105,559 |
Securities held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. agency and mortgage-backed securities |  | $ | 49,662 |  |  | $ | 36 |  |  | $ | (326 | ) |  | $ | 49,372 |
Obligations of states and political subdivisions |  |  | 15,357 |  |  |  | 228 |  |  |  | (19 | ) |  |  | 15,566 |
Corporate debt securities |  |  | 1,500 |  |  |  | — |  |  |  | — |  |  |  | 1,500 |
Total securities held to maturity |  | $ | 66,519 |  |  | $ | 264 |  |  | $ | (345 | ) |  | $ | 66,438 |
Total securities |  | $ | 172,370 |  |  | $ | 865 |  |  | $ | (1,238 | ) |  | $ | 171,997 |
Summary of Investments in an Unrealized Loss Position that were Temporarily Impaired | At December 31, 2016 and 2015, investments in an unrealized loss position that were temporarily impaired were as follows (in thousands):
|  | 2016 |
|  | Less than 12 months |  |  | 12 months or more |  |  | Total |
|  |  |  |  | Unrealized |  |  |  |  |  | Unrealized |  |  |  |  |  | Unrealized |
|  | Fair Value |  |  | (Loss) |  |  | Fair Value |  |  | (Loss) |  |  | Fair Value |  |  | (Loss) |
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. agency and mortgage-backed securities |  | $ | 60,943 |  |  | $ | (1,249 | ) |  | $ | 5,499 |  |  | $ | (208 | ) |  | $ | 66,442 |  |  | $ | (1,457 | )
Obligations of states and political subdivisions |  |  | 5,130 |  |  |  | (180 | ) |  |  | — |  |  |  | — |  |  |  | 5,130 |  |  |  | (180 | )
Total securities available for sale |  | $ | 66,073 |  |  | $ | (1,429 | ) |  | $ | 5,499 |  |  | $ | (208 | ) |  | $ | 71,572 |  |  | $ | (1,637 | )
Securities held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. agency and mortgage-backed securities |  | $ | 34,770 |  |  | $ | (483 | ) |  | $ | — |  |  | $ | — |  |  | $ | 34,770 |  |  | $ | (483 | )
Obligations of states and political subdivisions |  |  | 12,724 |  |  |  | (211 | ) |  |  | — |  |  |  | — |  |  |  | 12,724 |  |  |  | (211 | )
Corporate debt securities |  |  | 1,486 |  |  |  | (14 | ) |  |  | — |  |  |  | — |  |  |  | 1,486 |  |  |  | (14 | )
Total securities held to maturity |  | $ | 48,980 |  |  | $ | (708 | ) |  | $ | — |  |  | $ | — |  |  | $ | 48,980 |  |  | $ | (708 | )
Total securities |  | $ | 115,053 |  |  | $ | (2,137 | ) |  | $ | 5,499 |  |  | $ | (208 | ) |  | $ | 120,552 |  |  | $ | (2,345 | )
|  | 2015 |
|  | Less than 12 months |  |  | 12 months or more |  |  | Total |
|  |  |  |  | Unrealized |  |  |  |  |  | Unrealized |  |  |  |  |  | Unrealized |
|  | Fair Value |  |  | (Loss) |  |  | Fair Value |  |  | (Loss) |  |  | Fair Value |  |  | (Loss) |
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. agency and mortgage-backed securities |  | $ | 50,185 |  |  | $ | (464 | ) |  | $ | 13,409 |  |  | $ | (379 | ) |  | $ | 63,594 |  |  | $ | (843 | )
Obligations of states and political subdivisions |  |  | 2,395 |  |  |  | (15 | ) |  |  | 1,053 |  |  |  | (35 | ) |  |  | 3,448 |  |  |  | (50 | )
Total securities available for sale |  | $ | 52,580 |  |  | $ | (479 | ) |  | $ | 14,462 |  |  | $ | (414 | ) |  | $ | 67,042 |  |  | $ | (893 | )
Securities held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. agency and mortgage-backed securities |  | $ | 32,791 |  |  | $ | (326 | ) |  | $ | — |  |  | $ | — |  |  | $ | 32,791 |  |  | $ | (326 | )
Obligations of states and political subdivisions |  |  | 3,052 |  |  |  | (19 | ) |  |  | — |  |  |  | — |  |  |  | 3,052 |  |  |  | (19 | )
Total securities held to maturity |  | $ | 35,843 |  |  | $ | (345 | ) |  | $ | — |  |  | $ | — |  |  | $ | 35,843 |  |  | $ | (345 | )
Total securities |  | $ | 88,423 |  |  | $ | (824 | ) |  | $ | 14,462 |  |  | $ | (414 | ) |  | $ | 102,885 |  |  | $ | (1,238 | )
Amortized Cost and Fair Value of Securities | The amortized cost and fair value of securities at December 31, 2016 by contractual maturity are shown below (in thousands). Expected maturities of mortgage-backed securities will differ from contractual maturities because borrowers may have the right to prepay obligations with or without call or prepayment penalties. Corporate equity securities are not included in the maturity categories in the following maturity summary because they do not have a stated maturity date.
|  | Available for Sale |  |  | Held to Maturity |
|  | Amortized |  |  | Fair |  |  | Amortized |  |  | Fair |
|  | Cost |  |  | Value |  |  | Cost |  |  | Value |
Due within one year |  | $ | 471 |  |  | $ | 473 |  |  | $ | — |  |  | $ | — |
Due after one year through five years |  |  | 10,550 |  |  |  | 10,520 |  |  |  | 1,776 |  |  |  | 1,771 |
Due after five years through ten years |  |  | 13,984 |  |  |  | 13,825 |  |  |  | 18,174 |  |  |  | 18,029 |
Due after ten years |  |  | 71,100 |  |  |  | 69,973 |  |  |  | 33,448 |  |  |  | 32,909 |
Corporate equity securities |  |  | 1 |  |  |  | 11 |  |  |  | — |  |  |  | — |
|  | $ | 96,106 |  |  | $ | 94,802 |  |  | $ | 53,398 |  |  | $ | 52,709 |
Composition of Restricted Securities | The composition of restricted securities at December 31, 2016 and 2015 was as follows (in thousands):
|  | 2016 |  |  | 2015 |
Federal Home Loan Bank stock |  | $ | 623 |  |  | $ | 466 |
Federal Reserve Bank stock |  |  | 875 |  |  |  | 875 |
Community Bankers’ Bank stock |  |  | 50 |  |  |  | 50 |
|  | $ | 1,548 |  |  | $ | 1,391 |

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