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Securities (Tables) | 9 Months Ended
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Sep. 30, 2018
Investments Debt And Equity Securities [Abstract] |
Available for Sale Securities | The amortized cost and fair market value of available for sale securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive loss were as follows:
September 30, 2018 |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
U.S. Treasury securities and obligations of U.S. government agencies |  | $ | 29,069 |  |  | $ | 139 |  |  | $ | (233 | ) |  | $ | 28,975 |
Obligations of states and political subdivisions |  |  | 153,285 |  |  |  | 1,862 |  |  |  | (1,277 | ) |  |  | 153,870 |
Mortgage-backed securities in government sponsored entities |  |  | 135,764 |  |  |  | 316 |  |  |  | (1,959 | ) |  |  | 134,121 |
Total debt securities |  | $ | 318,118 |  |  | $ | 2,317 |  |  | $ | (3,469 | ) |  | $ | 316,966 |
December 31, 2017 |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
U.S. Treasury securities and obligations of U.S. government agencies |  | $ | 30,450 |  |  | $ | 100 |  |  | $ | (192 | ) |  | $ | 30,358 |
Obligations of states and political subdivisions |  |  | 114,002 |  |  |  | 4,226 |  |  |  | (172 | ) |  |  | 118,056 |
Mortgage-backed securities in government sponsored entities |  |  | 82,098 |  |  |  | 408 |  |  |  | (690 | ) |  |  | 81,816 |
Total debt securities |  | $ | 226,550 |  |  | $ | 4,734 |  |  | $ | (1,054 | ) |  | $ | 230,230 |
Fair Value of Securities by Contractual Maturity | The amortized cost and fair value of securities at September 30, 2018, by contractual maturity, is shown below. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations. Securities not due at a single maturity date, primarily mortgage-backed securities and equity securities are shown separately.
Available for sale |  | Amortized Cost |  |  | Fair Value |
Due in one year or less |  | $ | 15,294 |  |  | $ | 15,226 |
Due after one year through five years |  |  | 16,910 |  |  |  | 16,856 |
Due after five years through ten years |  |  | 30,844 |  |  |  | 31,729 |
Due after ten years |  |  | 119,306 |  |  |  | 119,034 |
Mortgage-backed securities |  |  | 135,764 |  |  |  | 134,121 |
Total securities available for sale |  | $ | 318,118 |  |  | $ | 316,966 |
Proceeds from Sales of Securities, Gross Realized Gains and Losses | Proceeds from sales of securities, gross realized gains and gross realized losses were as follows:
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Sale proceeds |  | $ | 12,063 |  |  | $ | 953 |  |  | $ | 12,063 |  |  | $ | 953 |
Gross realized gains |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Gross realized losses |  |  | 392 |  |  |  | — |  |  |  | 392 |  |  |  | — |
Gains (losses) from securities called or settled by the issuer |  |  | — |  |  |  | (9 | ) |  |  | 6 |  |  |  | (9 | )
Securities with Unrealized Losses Not Recognized in Income | Securities with unrealized losses at September 30, 2018 and December 31, 2017 not recognized in income are as follows:
September 30, 2018 |  | 12 Months or less |  |  | More than 12 months |  |  | Total |
Description of Securities |  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |
U.S. Treasury securities and obligations of U.S. government agencies |  | $ | 7,156 |  |  | $ | (107 | ) |  | $ | 13,774 |  |  | $ | (126 | ) |  | $ | 20,930 |  |  | $ | (233 | )
Obligations of states and political subdivisions |  |  | 58,768 |  |  |  | (967 | ) |  |  | 7,374 |  |  |  | (310 | ) |  |  | 66,142 |  |  |  | (1,277 | )
Mortgage-backed securities in gov’t sponsored entities |  |  | 59,325 |  |  |  | (714 | ) |  |  | 33,218 |  |  |  | (1,245 | ) |  |  | 92,543 |  |  |  | (1,959 | )
Total temporarily impaired |  | $ | 125,249 |  |  | $ | (1,788 | ) |  | $ | 54,366 |  |  | $ | (1,681 | ) |  | $ | 179,615 |  |  | $ | (3,469 | )
December 31, 2017 |  | 12 Months or less |  |  | More than 12 months |  |  | Total |
Description of Securities |  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |
U.S. Treasury securities and obligations of U.S. government agencies |  | $ | 20,449 |  |  | $ | (100 | ) |  | $ | 6,617 |  |  | $ | (92 | ) |  | $ | 27,066 |  |  | $ | (192 | )
Obligations of states and political subdivisions |  |  | 4,057 |  |  |  | (41 | ) |  |  | 7,309 |  |  |  | (131 | ) |  |  | 11,366 |  |  |  | (172 | )
Mortgage-backed securities in gov’t sponsored entities |  |  | 29,534 |  |  |  | (195 | ) |  |  | 22,199 |  |  |  | (495 | ) |  |  | 51,733 |  |  |  | (690 | )
Total temporarily impaired |  | $ | 54,040 |  |  | $ | (336 | ) |  | $ | 36,125 |  |  | $ | (718 | ) |  | $ | 90,165 |  |  | $ | (1,054 | )
Schedule of Net Gains and Losses on Equity Investments Recognized in Earnings and Portion of Unrealized Gains and Losses for Period that Relates to Equity Investments | The following table presents the net gains and losses on equity investments recognized in earnings for the three and nine-months ended September 30, 2018, and the portion of unrealized gains and losses for the period that relates to equity investments held at September 30, 2018:
|  | Three months ended |  |  | Nine months ended |
|  | September 30, 2018 |  |  | September 30, 2018 |
Net gains recognized on equity securities during the period |  | $ | 27 |  |  | $ | 102 |
Less: Net gains (losses) realized on the sale of equity securities during the period |  |  | — |  |  |  | — |
Unrealized gains recognized in equity securities held at reporting date |  | $ | 27 |  |  | $ | 102 |

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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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