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Securities | 6 Months Ended
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Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract] |
Securities | Note 4. Securities The amortized cost, gross unrealized gains and losses and fair value of securities available-for-sale are summarized as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2021
​ |  | ​ | ​ |  | Gross |  | Gross |  | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
​ | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Value
U.S. Treasury | ​ | $ | 6,381 | ​ | $ | 57 | ​ | $ | — | ​ | $ | 6,438
U.S. Government-sponsored enterprises (GSEs) | ​ | ​ | 73,503 | ​ | ​ | 191 | ​ | ​ | (1,074) | ​ | ​ | 72,620
Municipal securities | ​ |  | 86,720 | ​ |  | 2,188 | ​ |  | — | ​ |  | 88,908
Other debt securities | ​ |  | 29,019 | ​ |  | 414 | ​ |  | (82) | ​ |  | 29,351
Mortgage-backed securities (GSEs) | ​ |  | 52,430 | ​ |  | 1,201 | ​ |  | (131) | ​ |  | 53,500
Total | ​ | $ | 248,053 | ​ | $ | 4,051 | ​ | $ | (1,287) | ​ | $ | 250,817
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ |  | ​ | ​ |  | Gross |  | Gross |  | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
​ | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Value
U.S. Government-sponsored enterprises (GSEs) | ​ | $ | 30,526 | ​ | $ | 10 | ​ | $ | (6) | ​ | $ | 30,530
Municipal securities | ​ |  | 89,644 | ​ |  | 2,345 | ​ |  | — | ​ |  | 91,989
Other debt securities | ​ |  | 25,019 | ​ |  | 112 | ​ |  | (13) | ​ |  | 25,118
Mortgage-backed securities (GSEs) | ​ |  | 66,425 | ​ |  | 1,754 | ​ |  | (182) | ​ |  | 67,997
Total | ​ | $ | 211,614 | ​ | $ | 4,221 | ​ | $ | (201) | ​ | $ | 215,634
​ At June 30, 2021 and December 31, 2020, securities with a carrying value totaling approximately $122.4 million and $80.2 million, respectively, were pledged to secure public funds and securities sold under agreements to repurchase. The Company has entered into various fair value hedging transactions to mitigate the impact of changing interest rates on the fair values of available for sale securities. See Note 11 – Derivatives Financial Instruments for disclosure of the gains and losses recognized on derivative instruments and the cumulative fair value hedging adjustments to the carrying amount of the hedged securities. ​ Proceeds from sale of securities available for sale, gross gains and gross losses on sales and redemptions for the three and six months ended June 30, 2021 and 2020 were as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended
​ | ​ | June 30, | ​ | June 30,
​ |  | 2021 |  | 2020 | ​ | 2021 |  | 2020
Proceeds from sales | ​ | $ | - | ​ | $ | 4,760 | ​ | $ | - | ​ | $ | 6,875
Gross gains | ​ | $ | - | ​ | $ | 16 | ​ | $ | - | ​ | $ | 16
Gross losses | ​ | $ | - | ​ | $ | - | ​ | $ | - | ​ | $ | -
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Proceeds from maturities and calls | ​ | $ | 2,178 | ​ | $ | 12,200 | ​ | $ | 11,275 | ​ | $ | 15,450
​ The amortized cost and estimated fair value of securities at June 30, 2021, by contractual maturity for non-mortgage backed securities are shown below (in thousands). Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2021
​ |  | Amortized |  | Fair
​ | ​ | Cost | ​ | Value
Due in one year or less | ​ | $ | 5,025 | ​ | $ | 5,041
Due from one year to five years | ​ |  | 4,039 | ​ |  | 4,058
Due from five years to ten years | ​ |  | 66,493 | ​ |  | 67,152
Due after ten years | ​ |  | 120,066 | ​ |  | 121,066
​ | ​ |  | 195,623 | ​ |  | 197,317
Mortgage-backed securities | ​ |  | 52,430 | ​ |  | 53,500
Total | ​ | $ | 248,053 | ​ | $ | 250,817
​ The following tables present the gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities available-for-sale have been in a continuous unrealized loss position (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2021
​ | ​ | Less than 12 Months | ​ | 12 Months or Greater | ​ | Total
​ |  | ​ | ​ |  | Gross | ​ | Number |  | ​ | ​ |  | Gross | ​ | Number |  | ​ | ​ |  | Gross | ​ | Number
​ | ​ | Fair | ​ | Unrealized | ​ | of | ​ | Fair | ​ | Unrealized | ​ | of | ​ | Fair | ​ | Unrealized | ​ | of
​ | ​ | Value | ​ | Losses | ​ | Securities | ​ | Value | ​ | Losses | ​ | Securities | ​ | Value | ​ | Losses | ​ | Securities
U.S. Government-sponsored enterprises (GSEs) | ​ | $ | 35,861 | ​ | $ | (1,071) | ​ | 9 | ​ | $ | 841 | ​ | $ | (3) | ​ | 3 | ​ | $ | 36,702 | ​ | $ | (1,074) | ​ | 12
Municipal securities | ​ |  | — | ​ |  | — | ​ | — | ​ |  | — | ​ |  | — | ​ | — | ​ |  | — | ​ |  | — | ​ | —
Other debt securities | ​ |  | 10,918 | ​ |  | (82) | ​ | 5 | ​ |  | — | ​ |  | — | ​ | — | ​ |  | 10,918 | ​ |  | (82) | ​ | 5
Mortgage-backed securities (GSEs) | ​ |  | 36 | ​ |  | — | ​ | 1 | ​ |  | 9,862 | ​ |  | (131) | ​ | 6 | ​ |  | 9,898 | ​ |  | (131) | ​ | 7
Total | ​ | $ | 46,815 | ​ | $ | (1,153) | ​ | 15 | ​ | $ | 10,703 | ​ | $ | (134) | ​ | 9 | ​ | $ | 57,518 | ​ | $ | (1,287) | ​ | 24
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ | ​ | Less than 12 Months | ​ | 12 Months or Greater | ​ | Total
​ |  | ​ | ​ |  | Gross | ​ | Number |  | ​ | ​ |  | Gross | ​ | Number |  | ​ | ​ |  | Gross | ​ | Number
​ | ​ | Fair | ​ | Unrealized | ​ | of | ​ | Fair | ​ | Unrealized | ​ | of | ​ | Fair | ​ | Unrealized | ​ | of
​ | ​ | Value | ​ | Losses | ​ | Securities | ​ | Value | ​ | Losses | ​ | Securities | ​ | Value | ​ | Losses | ​ | Securities
U.S. Government-sponsored enterprises (GSEs) | ​ | $ | 15,510 | ​ | $ | (5) | ​ | 3 | ​ | $ | 132 | ​ | $ | (1) | ​ | 1 | ​ | $ | 15,642 | ​ | $ | (6) | ​ | 4
Municipal securities | ​ |  | — | ​ |  | — | ​ | — | ​ |  | — | ​ |  | — | ​ | — | ​ |  | — | ​ |  | — | ​ | —
Other debt securities | ​ |  | 1,495 | ​ |  | (5) | ​ | 1 | ​ |  | 977 | ​ |  | (8) | ​ | 1 | ​ |  | 2,472 | ​ |  | (13) | ​ | 2
Mortgage-backed securities (GSEs) | ​ |  | 9,790 | ​ |  | (87) | ​ | 6 | ​ |  | 6,083 | ​ |  | (95) | ​ | 3 | ​ |  | 15,873 | ​ |  | (182) | ​ | 9
Total | ​ | $ | 26,795 | ​ | $ | (97) | ​ | 10 | ​ | $ | 7,192 | ​ | $ | (104) | ​ | 5 | ​ | $ | 33,987 | ​ | $ | (201) | ​ | 15
​ The Company reviews the securities portfolio on a quarterly basis to monitor its exposure to other-than-temporary impairment. A determination as to whether a security’s decline in fair value is other-than-temporary takes into consideration numerous factors and the relative significance of any single factor can vary by security. Some factors the Company may consider in the other-than-temporary impairment analysis include the length of time and extent to which the security has been in an unrealized loss position, changes in security ratings, financial condition and near-term prospects of the issuer, as well as security and industry specific economic conditions. Based on this evaluation, the Company concluded that any unrealized losses at June 30, 2021, represented a temporary impairment, as these unrealized losses are primarily attributable to changes in interest rates and current market conditions, and not credit deterioration of the issuers. As of June 30, 2021, the Company does not intend to sell any of the securities, does not expect to be required to sell any of the securities, and expects to recover the entire amortized cost of all of the securities. The following is the amortized cost and carrying value of other investments (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
​ |  | 2021 |  | 2020
Federal Reserve Bank stock | ​ | $ | 8,316 |  | $ | 8,606
Federal Home Loan Bank stock | ​ |  | 5,918 |  | ​ | 5,838
First National Bankers Bank stock | ​ |  | 350 |  | ​ | 350
Total | ​ | $ | 14,584 | ​ | $ | 14,794
​ Our restricted investments consist of non-marketable equity securities that have no readily determinable market value. Accordingly, when evaluating these securities for impairment, management considers the ultimate recoverability of the par value rather than recognizing temporary declines in value. As of June 30, 2021, the Company determined that there was no impairment on its other investments.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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