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Investments Securities | 12 Months Ended
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Dec. 31, 2022
Investments Securities [Abstract] |
Investments Securities | ​ ​ 5. Investment Securities The following table shows a comparison of amortized cost and fair values of investment securities at December 31, 2022 and 2021: ​
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(in thousands) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |  | OTTI in AOCL
December 31, 2022 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available for Sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government agencies | ​ | $ | 11,044 | ​ | $ | — | ​ | $ | 1,582 | ​ | $ | 9,462 | ​ | $ | —
Residential mortgage-backed agencies | ​ | ​ | 45,052 | ​ | ​ | — | ​ | ​ | 7,651 | ​ | ​ | 37,401 | ​ | ​ | —
Commercial mortgage-backed agencies | ​ | ​ | 37,393 | ​ | ​ | — | ​ | ​ | 6,661 | ​ | ​ | 30,732 | ​ | ​ | —
Collateralized mortgage obligations | ​ | ​ | 25,828 | ​ | ​ | — | ​ | ​ | 4,784 | ​ | ​ | 21,044 | ​ | ​ | —
Obligations of states and political subdivisions | ​ | ​ | 10,848 | ​ | ​ | 4 | ​ | ​ | 360 | ​ | ​ | 10,492 | ​ | ​ | —
Corporate Bonds | ​ | ​ | 1,000 | ​ | ​ | — | ​ | ​ | 113 | ​ | ​ | 887 | ​ | ​ | —
Collateralized debt obligations | ​ | ​ | 18,664 | ​ | ​ | — | ​ | ​ | 2,793 | ​ | ​ | 15,871 | ​ | ​ | (1,695)
Total available for sale | ​ | $ | 149,829 | ​ | $ | 4 | ​ | $ | 23,944 | ​ | $ | 125,889 | ​ | $ | (1,695)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | Amortized Cost |  | Gross Unrecognized Gains |  | Gross Unrecognized Losses |  | Fair Value |  | OTTI in AOCL
December 31, 2022 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held to Maturity: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. treasuries | ​ | $ | 37,204 | ​ | $ | — | ​ | $ | 1,593 | ​ | $ | 35,611 | ​ | $ | —
U.S. government agencies | ​ | ​ | 67,734 | ​ | ​ | — | ​ | ​ | 13,261 | ​ | ​ | 54,473 | ​ | ​ | —
Residential mortgage-backed agencies | ​ | ​ | 28,624 | ​ | ​ | 1 | ​ | ​ | 3,503 | ​ | ​ | 25,122 | ​ | ​ | —
Commercial mortgage-backed agencies | ​ | ​ | 22,389 | ​ | ​ | — | ​ | ​ | 4,568 | ​ | ​ | 17,821 | ​ | ​ | —
Collateralized mortgage obligations | ​ | ​ | 57,085 | ​ | ​ | — | ​ | ​ | 10,001 | ​ | ​ | 47,084 | ​ | ​ | —
Obligations of states and political subdivisions | ​ | ​ | 22,623 | ​ | ​ | 946 | ​ | ​ | 600 | ​ | ​ | 22,969 | ​ | ​ | —
Total held to maturity | ​ | $ | 235,659 | ​ | $ | 947 | ​ | $ | 33,526 | ​ | $ | 203,080 | ​ | $ | —
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(in thousands) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |  | OTTI in AOCL
December 31, 2021 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available for Sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government agencies |  | $ | 69,602 | ​ | $ | 66 | ​ | $ | 2,499 |  | $ | 67,169 |  | $ | —
Residential mortgage-backed agencies | ​ | ​ | 49,630 | ​ | ​ | — | ​ | ​ | 969 | ​ | ​ | 48,661 | ​ | ​ | —
Commercial mortgage-backed agencies | ​ | ​ | 51,694 | ​ | ​ | 175 | ​ | ​ | 1,001 | ​ | ​ | 50,868 | ​ | ​ | —
Collateralized mortgage obligations | ​ | ​ | 93,018 | ​ | ​ | 84 | ​ | ​ | 3,025 | ​ | ​ | 90,077 | ​ | ​ | —
Obligations of states and political subdivisions | ​ | ​ | 12,439 | ​ | ​ | 371 | ​ | ​ | 6 | ​ | ​ | 12,804 | ​ | ​ | —
Collateralized debt obligations | ​ | ​ | 18,609 | ​ | ​ | 112 | ​ | ​ | 1,529 | ​ | ​ | 17,192 | ​ | ​ | (660)
Total available for sale | ​ | $ | 294,992 | ​ | $ | 808 | ​ | $ | 9,029 | ​ | $ | 286,771 | ​ | $ | (660)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | Amortized Cost |  | Gross Unrecognized Gains |  | Gross Unrecognized Losses |  | Fair Value |  | OTTI in AOCL
December 31, 2021 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held to Maturity: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential mortgage-backed agencies | ​ | $ | 30,634 | ​ | $ | 649 | ​ | $ | 436 | ​ | $ | 30,847 | ​ | $ | —
Commercial mortgage-backed agencies | ​ | ​ | 5,456 | ​ | ​ | 145 | ​ | ​ | — | ​ | ​ | 5,601 | ​ | ​ | —
Obligations of states and political subdivisions | ​ | ​ | 20,169 | ​ | ​ | 8,752 | ​ | ​ | — | ​ | ​ | 28,921 | ​ | ​ | —
Total held to maturity | ​ | $ | 56,259 | ​ | $ | 9,546 | ​ | $ | 436 | ​ | $ | 65,369 | ​ | $ | —
​ Proceeds from sales of available-for-sale securities and the realized gains and losses for the years ended December 31, 2022 and 2021 are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | 2022 |  | 2021
Proceeds | ​ | $ | 1,023 | ​ | $ | 13,687
Gross realized gains | ​ | ​ | 3 | ​ | ​ | 370
Gross realized losses | ​ | ​ | — | ​ | ​ | 216
​ The following table shows the Corporation’s securities with gross unrealized and unrecognized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized position, at December 31, 2022 and 2021: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 months | ​ | 12 months or more
(in thousands) |  | Fair Value |  | Unrealized Losses |  | Number of Investments |  | Fair Value |  | Unrealized Losses |  | Number of Investments
December 31, 2022 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available for Sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government agencies | ​ | $ | 4,598 | ​ | $ | 402 | ​ | 1 | ​ | $ | 4,865 | ​ | $ | 1,180 | ​ | 2
Residential mortgage-backed agencies | ​ | ​ | — | ​ | ​ | — | ​ | — | ​ | ​ | 37,401 | ​ | ​ | 7,651 | ​ | 5
Commercial mortgage-backed agencies | ​ | ​ | 4,044 | ​ | ​ | 455 | ​ | 3 | ​ | ​ | 26,688 | ​ | ​ | 6,206 | ​ | 6
Collateralized mortgage obligations | ​ | ​ | 1,600 | ​ | ​ | 210 | ​ | 5 | ​ | ​ | 19,444 | ​ | ​ | 4,574 | ​ | 5
Obligations of states and political subdivisions | ​ | ​ | 8,906 | ​ | ​ | 360 | ​ | 7 | ​ | ​ | — | ​ | ​ | — | ​ | —
Corporate Bonds | ​ | ​ | 887 | ​ | ​ | 113 | ​ | 1 | ​ | ​ | — | ​ | ​ | — | ​ | —
Collateralized debt obligations | ​ | ​ | — | ​ | ​ | — | ​ | — | ​ | ​ | 15,871 | ​ | ​ | 2,793 | ​ | 9
Total available for sale | ​ | $ | 20,035 | ​ | $ | 1,540 | ​ | 17 | ​ | $ | 104,269 | ​ | $ | 22,404 | ​ | 27
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 months | ​ | 12 months or more
(in thousands) |  | Fair Value |  | Unrealized Losses |  | Number of Investments |  | Fair Value |  | Unrealized Losses |  | Number of Investments
December 31, 2022 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held to Maturity: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. treasuries | ​ | $ | — | ​ | $ | — | ​ | — | ​ | $ | 35,611 | ​ | $ | 1,593 | ​ | 4
U.S. government agencies | ​ | ​ | 38,883 | ​ | ​ | 9,617 | ​ | 7 | ​ | ​ | 15,591 | ​ | ​ | 3,644 | ​ | 2
Residential mortgage-backed agencies | ​ | ​ | 16,893 | ​ | ​ | 1,425 | ​ | 29 | ​ | ​ | 8,138 | ​ | ​ | 2,078 | ​ | 7
Commercial mortgage-backed agencies | ​ | ​ | 17,821 | ​ | ​ | 4,568 | ​ | 3 | ​ | ​ | — | ​ | ​ | — | ​ | —
Collateralized mortgage obligations | ​ | ​ | 47,083 | ​ | ​ | 10,001 | ​ | 8 | ​ | ​ | — | ​ | ​ | — | ​ | —
Obligations of states and political subdivisions | ​ | ​ | 2,269 | ​ | ​ | 600 | ​ | 1 | ​ | ​ | — | ​ | ​ | — | ​ | —
Total held to maturity | ​ | $ | 122,949 | ​ | $ | 26,211 | ​ | 48 | ​ | $ | 59,340 | ​ | $ | 7,315 | ​ | 13
​ ​ ​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 months | ​ | 12 months or more
(in thousands) |  | Fair Value |  | Unrealized Losses |  | Number of Investments |  | Fair Value |  | Unrealized Losses |  | Number of Investments
December 31, 2021 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available for Sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government agencies | ​ | $ | 23,577 | ​ | $ | 122 | ​ | 3 | ​ | $ | 33,972 | ​ | $ | 2,377 | ​ | 6
Residential mortgage-backed agencies | ​ | ​ | 29,507 | ​ | ​ | 257 | ​ | 3 | ​ | ​ | 19,154 | ​ | ​ | 712 | ​ | 2
Commercial mortgage-backed agencies | ​ | ​ | 32,177 | ​ | ​ | 787 | ​ | 4 | ​ | ​ | 5,211 | ​ | ​ | 214 | ​ | 1
Collateralized mortgage obligations | ​ | ​ | 24,322 | ​ | ​ | 649 | ​ | 5 | ​ | ​ | 43,076 | ​ | ​ | 2,376 | ​ | 5
Obligations of states and political subdivisions | ​ | ​ | 3,046 | ​ | ​ | 6 | ​ | 1 | ​ | ​ | — | ​ | ​ | — | ​ | —
Collateralized debt obligations | ​ | ​ | — | ​ | ​ | — | ​ | — | ​ | ​ | 10,468 | ​ | ​ | 1,529 | ​ | 5
Total available for sale | ​ | $ | 112,629 | ​ | $ | 1,821 | ​ | 16 | ​ | $ | 111,881 | ​ | $ | 7,208 | ​ | 19
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 months | ​ | 12 months or more
(in thousands) |  | Fair Value |  | Unrecognized Losses |  | Number of Investments |  | Fair Value |  | Unrecognized Losses |  | Number of Investments
December 31, 2021 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held to Maturity: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential mortgage-backed agencies | ​ | $ | 7,395 | ​ | $ | 291 | ​ | 6 | ​ | $ | 2,782 | ​ | $ | 145 | ​ | 1
Total held to maturity | ​ | $ | 7,395 | ​ | $ | 291 | ​ | 6 | ​ | $ | 2,782 | ​ | $ | 145 | ​ | 1
​ Management systematically evaluates securities for impairment on a quarterly basis. Based upon application of Accounting Standards Codification (“ASC”) Topic 320 (Section 320-10-35) issued by the Financial Accounting Standards Board (the “FASB”), management must assess whether (i) the Corporation has the intent to sell the security and (ii) it is more likely than not that the Corporation will be required to sell the security prior to its anticipated recovery. If neither applies, then declines in the fair value of securities below their cost that are considered other-than-temporary declines are split into two components. The first is the loss attributable to declining credit quality. Credit losses are recognized in earnings as realized losses in the period in which the impairment determination is made. The second component consists of all other losses. The other losses are recognized in other comprehensive income. In estimating OTTI charges, management considers (a) the length of time and the extent to which the fair value has been less than cost, (b) adverse conditions specifically related to the security, an industry, or a geographic area, (c) the historic and implied volatility of the security, (d) changes in the rating of a security by a rating agency, (e) recoveries or additional declines in fair value subsequent to the balance sheet date, (f) failure of the issuer of the security to make scheduled interest payments, and (g) the payment structure of the debt security and the likelihood of the issuer being able to make payments that increase in the future. Due to the duration and the significant market value decline in the pooled trust preferred securities held in our portfolio, we performed more extensive testing on these securities for purposes of evaluating whether or not an OTTI has occurred. Management has concluded that no OTTI occurred for the years ended December 31, 2022 and 2021. The following table presents a cumulative roll-forward of the amount of OTTI charges related to credit losses which have been recognized in earnings for the trust preferred securities in the CDO portfolio held and not intended to be sold for the years ended December 31, 2022 and 2021: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | 2022 |  | 2021
Balance of credit-related OTTI at January 1 | ​ | $ | 2,043 | ​ | $ | 2,244
Reduction for increases in cash flows expected to be collected | ​ | ​ | (202) | ​ | ​ | (201)
Balance of credit-related OTTI at December 31 | ​ | $ | 1,841 | ​ | $ | 2,043
​ ​ The amortized cost and estimated fair value of securities by contractual maturity at December 31, 2022 are shown in the following table. Actual maturities will differ from contractual maturities because the issuers of the securities may have the right to call or prepay obligations with or without call or prepayment penalties. ​
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​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | Amortized Cost |  | Fair Value
Contractual Maturity | ​ | ​ | ​ | ​ | ​ | ​
Available for sale: | ​ | ​ | ​ | ​ | ​ | ​
Due in one year or less | ​ | $ | 340 | ​ | $ | 340
Due after one year through five years | ​ | ​ | 11,964 | ​ | ​ | 11,018
Due after five years through ten years | ​ | ​ | 1,895 | ​ | ​ | 1,778
Due after ten years | ​ | ​ | 27,357 | ​ | ​ | 23,576
​ | ​ | ​ | 41,556 | ​ | ​ | 36,712
Residential mortgage-backed agencies | ​ | ​ | 45,052 | ​ | ​ | 37,401
Commercial mortgage-backed agencies | ​ | ​ | 37,393 | ​ | ​ | 30,732
Collateralized mortgage obligations | ​ | ​ | 25,828 | ​ | ​ | 21,044
Total available for sale | ​ | $ | 149,829 | ​ | $ | 125,889
Held to Maturity: | ​ | ​ | ​ | ​ | ​ | ​
Due after one year through five years | ​ | $ | 49,704 | ​ | $ | 46,857
Due after five years through ten years | ​ | $ | 33,022 | ​ | $ | 26,825
Due after ten years | ​ | $ | 44,835 | ​ | $ | 39,371
​ | ​ | ​ | 127,561 | ​ | ​ | 113,053
Residential mortgage-backed agencies | ​ | ​ | 28,624 | ​ | ​ | 25,122
Commercial mortgage-backed agencies | ​ | ​ | 22,389 | ​ | ​ | 17,821
Collateralized mortgage obligations | ​ | ​ | 57,085 | ​ | ​ | 47,084
Total held to maturity | ​ | $ | 235,659 | ​ | $ | 203,080
​ At December 31, 2022 and 2021, investment securities with a fair value of $209.8 million and $158.7 million, respectively, were pledged as permitted or required to secure public deposits, for securities sold under agreements to repurchase as required or permitted by law and as collateral for borrowing capacity.

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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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