Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] | Note 2. The Company invests in U.S. agency and mortgage-backed securities, obligations of state and political subdivisions, and corporate debt securities. Amortized costs and fair values of securities at September 30, 2019 December 31, 2018 September 30, 2019 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value Securities available for sale: U.S. agency and mortgage-backed securities $ 87,004 $ 1,112 $ (184 ) $ 87,932 Obligations of states and political subdivisions 26,118 519 (1 ) 26,636 Total securities available for sale $ 113,122 $ 1,631 $ (185 ) $ 114,568 Securities held to maturity: U.S. agency and mortgage-backed securities $ 13,119 $ 21 $ (71 ) $ 13,069 Obligations of states and political subdivisions 3,603 67 — 3,670 Corporate debt securities 1,500 20 — 1,520 Total securities held to maturity $ 18,222 $ 108 $ (71 ) $ 18,259 Total securities $ 131,344 $ 1,739 $ (256 ) $ 132,827 December 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value Securities available for sale: U.S. agency and mortgage-backed securities $ 86,944 $ 44 $ (2,066 ) $ 84,922 Obligations of states and political subdivisions 15,203 31 (299 ) 14,935 Total securities available for sale $ 102,147 $ 75 $ (2,365 ) $ 99,857 Securities held to maturity: U.S. agency and mortgage-backed securities $ 27,420 $ — $ (869 ) $ 26,551 Obligations of states and political subdivisions 14,488 20 (174 ) 14,334 Corporate debt securities 1,500 9 — 1,509 Total securities held to maturity $ 43,408 $ 29 $ (1,043 ) $ 42,394 Total securities $ 145,555 $ 104 $ (3,408 ) $ 142,251 At September 30, 2019 December 31, 2018 September 30, 2019 Less than 12 months 12 months or more Total Fair Value Unrealized (Loss) Fair Value Unrealized (Loss) Fair Value Unrealized (Loss) Securities available for sale: U.S. agency and mortgage-backed securities $ 13,786 $ (45 ) $ 14,185 $ (139 ) $ 27,971 $ (184 ) Obligations of states and political subdivisions 230 (1 ) — — 230 (1 ) Total securities available for sale $ 14,016 $ (46 ) $ 14,185 $ (139 ) $ 28,201 $ (185 ) Securities held to maturity: U.S. agency and mortgage-backed securities $ — $ — $ 7,692 $ (71 ) $ 7,692 $ (71 ) Total securities held to maturity $ — $ — $ 7,692 $ (71 ) $ 7,692 $ (71 ) Total securities $ 14,016 $ (46 ) $ 21,877 $ (210 ) $ 35,893 $ (256 ) December 31, 2018 Less than 12 months 12 months or more Total Fair Value Unrealized (Loss) Fair Value Unrealized (Loss) Fair Value Unrealized (Loss) Securities available for sale: U.S. agency and mortgage-backed securities $ 26,350 $ (215 ) $ 49,652 $ (1,851 ) $ 76,002 $ (2,066 ) Obligations of states and political subdivisions 3,761 (25 ) 5,127 (274 ) 8,888 (299 ) Total securities available for sale $ 30,111 $ (240 ) $ 54,779 $ (2,125 ) $ 84,890 $ (2,365 ) Securities held to maturity: U.S. agency and mortgage-backed securities $ — $ — $ 26,551 $ (869 ) $ 26,551 $ (869 ) Obligations of states and political subdivisions 5,326 (37 ) 6,115 (137 ) 11,441 (174 ) Total securities held to maturity $ 5,326 $ (37 ) $ 32,666 $ (1,006 ) $ 37,992 $ (1,043 ) Total securities $ 35,437 $ (277 ) $ 87,445 $ (3,131 ) $ 122,882 $ (3,408 ) The tables above provide information about securities that have been in an unrealized loss position for less than twelve twelve 1 2 not 3 not not not At September 30, 2019 thirty-three ninety one eighty-one 3.5 September 30, 2019 December 31, 2018 eighty-three ninety fifty-six eighty-two December 31, 2018 4.6 December 31, 2018 September 30, 2019 not The amortized cost and fair value of securities at September 30, 2019 may Available for Sale Held to Maturity Amortized Cost Fair Value Amortized Cost Fair Value Due within one year $ 2,034 $ 2,042 $ 437 $ 437 Due after one year through five years 7,732 7,768 4,741 4,795 Due after five years through ten years 29,875 30,591 3,415 3,445 Due after ten years 73,481 74,167 9,629 9,582 $ 113,122 $ 114,568 $ 18,222 $ 18,259 On January 1, 2019, No. 2017 12 $23.0 $431 Federal Home Loan Bank, Federal Reserve Bank, and Community Bankers’ Bank stock are generally viewed as long-term investments and as restricted securities, which are carried at cost, because there is a minimal market for the stock. Therefore, when evaluating restricted securities for impairment, their value is based on the ultimate recoverability of the par value rather than by recognizing temporary declines in value. The Company does not September 30, 2019 no The composition of restricted securities at September 30, 2019 December 31, 2018 September 30, 2019 December 31, 2018 Federal Home Loan Bank stock $ 776 $ 763 Federal Reserve Bank stock 980 875 Community Bankers’ Bank stock 50 50 $ 1,806 $ 1,688 |