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Investment Securities (Tables) | 6 Months Ended
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Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract] |
Schedule of Investment Available-For-Sale | The amortized cost and estimated fair values of investment securities are summarized below. For the three and six months ended June 30, 2023, there was no allowance for credit losses on available-for-sale securities. AVAILABLE-FOR-SALE: Schedule of Investment Available-For-Sale
|  |  |  |  | Gross |  |  | Gross |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  |  |
(Dollars in thousands) |  | Cost |  |  | Gains |  |  | Losses |  |  | Fair Value |
June 30, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
US Treasury securities |  | $ | 60,649 |  |  | $ | — |  |  | $ | (4,173 | ) |  | $ | 56,476 |
Government Sponsored Enterprises |  |  | 2,500 |  |  |  | — |  |  |  | (396 | ) |  |  | 2,104 |
Mortgage-backed securities |  |  | 262,719 |  |  |  | 30 |  |  |  | (18,959 | ) |  |  | 243,790 |
Small Business Administration pools |  |  | 18,605 |  |  |  | 97 |  |  |  | (536 | ) |  |  | 18,166 |
Corporate and other securities |  |  | 8,770 |  |  |  | — |  |  |  | (1,067 | ) |  |  | 7,703 |
Total |  | $ | 353,243 |  |  | $ | 127 |  |  | $ | (25,131 | ) |  | $ | 328,239 |
|  |  |  |  | Gross |  |  | Gross |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  |  |
(Dollars in thousands) |  | Cost |  |  | Gains |  |  | Losses |  |  | Fair Value |
December 31, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
US Treasury securities |  | $ | 60,552 |  |  | $ | — |  |  | $ | (4,569 | ) |  | $ | 55,983 |
Government Sponsored Enterprises |  |  | 2,500 |  |  |  | — |  |  |  | (426 | ) |  |  | 2,074 |
Mortgage-backed securities |  |  | 263,704 |  |  |  | 10 |  |  |  | (19,114 | ) |  |  | 244,600 |
Small Business Administration pools |  |  | 21,657 |  |  |  | 60 |  |  |  | (630 | ) |  |  | 21,087 |
Corporate and other securities |  |  | 8,772 |  |  |  | 12 |  |  |  | (666 | ) |  |  | 8,118 |
Total |  | $ | 357,185 |  |  | $ | 82 |  |  | $ | (25,405 | ) |  | $ | 331,862 |
Schedule of gross unrealized losses and fair values of available-for-sale securities | The following tables show gross unrealized losses and fair values of available-for-sale securities for which an allowance for credit losses has not been recorded, aggregated by investment category and length of time that individual securities have been in a continuous loss position, as of June 30, 2023. Schedule of gross unrealized losses and fair values of available-for-sale securities
June 30, 2023 |  | Less than 12 months |  |  | 12 months or more |  |  | Total |
Available-for-sale securities: |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
(Dollars in thousands) |  | Value |  |  | Loss |  |  | Value |  |  | Loss |  |  | Value |  |  | Loss |
US Treasury Securities |  | $ | — |  |  | $ | — |  |  | $ | 56,476 |  |  | $ | 4,173 |  |  | $ | 56,476 |  |  | $ | 4,173 |
Government Sponsored Enterprise |  |  | — |  |  |  | — |  |  |  | 2,104 |  |  |  | 396 |  |  |  | 2,104 |  |  |  | 396 |
Mortgage-backed securities |  |  | 43,304 |  |  |  | 2,013 |  |  |  | 197,311 |  |  |  | 16,946 |  |  |  | 240,615 |  |  |  | 18,959 |
Small Business Administration pools |  |  | 2,426 |  |  |  | 48 |  |  |  | 9,949 |  |  |  | 488 |  |  |  | 12,375 |  |  |  | 536 |
Corporate and other securities |  |  | 3,037 |  |  |  | 229 |  |  |  | 3,912 |  |  |  | 838 |  |  |  | 6,949 |  |  |  | 1,067 |
Total |  | $ | 48,767 |  |  | $ | 2,290 |  |  | $ | 269,752 |  |  | $ | 22,841 |  |  | $ | 318,519 |  |  | $ | 25,131 |
The following table shows gross unrealized losses by fair values of available-for-sale securities, aggregated by investment category and length of time that individual securities have been in a continuous loss position as of December 31, 2022.
December 31, 2022 |  | Less than 12 months |  |  | 12 months or more |  |  | Total |
Available-for-sale securities: |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
(Dollars in thousands) |  | Value |  |  | Loss |  |  | Value |  |  | Loss |  |  | Value |  |  | Loss |
US Treasury Securities |  | $ | 28,827 |  |  | $ | 1,032 |  |  | $ | 27,156 |  |  | $ | 3,537 |  |  | $ | 55,983 |  |  | $ | 4,569 |
Government Sponsored Enterprise |  |  | — |  |  |  | — |  |  |  | 2,074 |  |  |  | 426 |  |  |  | 2,074 |  |  |  | 426 |
Mortgage-backed securities |  |  | 81,961 |  |  |  | 4,435 |  |  |  | 159,227 |  |  |  | 14,679 |  |  |  | 241,188 |  |  |  | 19,114 |
Small Business Administration pools |  |  | 16,066 |  |  |  | 453 |  |  |  | 2,592 |  |  |  | 177 |  |  |  | 18,658 |  |  |  | 630 |
Corporate and other securities |  |  | 2,128 |  |  |  | 146 |  |  |  | 3,230 |  |  |  | 520 |  |  |  | 5,358 |  |  |  | 666 |
Total |  | $ | 128,982 |  |  | $ | 6,066 |  |  | $ | 194,279 |  |  | $ | 19,339 |  |  | $ | 323,261 |  |  | $ | 25,405 |
Schedule of allowance for credit losses on held to maturity securities | The following table shows a roll forward of the allowance for credit losses on held to maturity securities for the six months ended June 30, 2023. Schedule of allowance for credit losses on held to maturity securities
|  | State and |
Held-to-Maturity securities |  | local |
(Dollars in thousands) |  | government |
Allowance for Credit Losses on Held-to-Maturity Securities: |  |  |  |
Beginning balance, December 31, 2022 |  | $ | — |
Adjustment for adoption of ASU 2016-13 |  |  | (43 | )
Provision for credit losses |  |  | 6 |
Ending balance, June 30, 2023 |  | $ | (37 | )
Schedule of Amortized Cost and Fair Value of Investment Securities | The following table shows the amortized cost and fair value of investment securities at June 30, 2023, by expected maturity. Expected maturities differ from contractual maturities because borrowers may have the right to call or prepay the obligations with or without prepayment penalties. Mortgage-backed securities are included in the year corresponding with the remaining expected life. Schedule of Amortized Cost and Fair Value of Investment Securities
|  | Available-for-sale |
June 30, 2023 |  | Amortized |  |  | Fair |
(Dollars in thousands) |  | Cost |  |  | Value |
Due in one year or less |  | $ | 30,689 |  |  | $ | 29,991 |
Due after one year through five years |  |  | 66,774 |  |  |  | 63,993 |
Due after five years through ten years |  |  | 227,657 |  |  |  | 209,216 |
Due after ten years |  |  | 28,123 |  |  |  | 25,039 |
Total |  | $ | 353,243 |  |  | $ | 328,239 |
|  | Held-To-Maturity |
June 30, 2023 |  | Amortized |  |  | Fair |
(Dollars in thousands) |  | Cost |  |  | Value |
Due in one year or less |  | $ | 2,598 |  |  | $ | 2,574 |
Due after one year through five years |  |  | 45,364 |  |  |  | 43,770 |
Due after five years through ten years |  |  | 131,370 |  |  |  | 123,365 |
Due after ten years |  |  | 42,097 |  |  |  | 38,648 |
Allowance for Credit Losses on Held-to-Maturity Securities |  |  | (37 | ) |  |  | (37 | )
Total |  | $ | 221,392 |  |  | $ | 208,320 |

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