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Investments (Tables) | 9 Months Ended
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Sep. 30, 2021
Schedule of Investments [Abstract] |
Schedule of Available-for-sale Securities | A summary of investment securities available-for-sale is as follows: Schedule of Available-for-sale Securities
|  | As of September 30, 2021
|  |  |  |  | Gross |  |  | Gross |  |  |  |
|  | Amortized |  |  | unrealized |  |  | unrealized |  |  | Estimated |
(Dollars in thousands) |  | cost |  |  | gains |  |  | losses |  |  | fair value |
U. S. treasury securities |  | $ | 40,397 |  |  | $ | 11 |  |  | $ | (94 | ) |  | $ | 40,314 |
U. S. federal agency obligations |  |  | 17,211 |  |  |  | 95 |  |  |  | (9 | ) |  |  | 17,297 |
Municipal obligations, tax exempt |  |  | 135,818 |  |  |  | 4,999 |  |  |  | (29 | ) |  |  | 140,788 |
Municipal obligations, taxable |  |  | 37,599 |  |  |  | 1,447 |  |  |  | (58 | ) |  |  | 38,988 |
Agency mortgage-backed securities |  |  | 132,034 |  |  |  | 1,904 |  |  |  | (436 | ) |  |  | 133,502 |
Certificates of deposit |  |  | 7,629 |  |  |  | - |  |  |  | - |  |  |  | 7,629 |
Total available-for-sale |  | $ | 370,688 |  |  | $ | 8,456 |  |  | $ | (626 | ) |  | $ | 378,518 |
|  | As of December 31, 2020
|  |  |  |  | Gross |  |  | Gross |  |  |  |
|  | Amortized |  |  | unrealized |  |  | unrealized |  |  | Estimated |
(Dollars in thousands) |  | cost |  |  | gains |  |  | losses |  |  | fair value |
U. S. treasury securities |  | $ | 2,000 |  |  | $ | 37 |  |  | $ | - |  |  | $ | 2,037 |
U. S. federal agency obligations |  |  | 18,804 |  |  |  | 138 |  |  |  | (18 | ) |  |  | 18,924 |
Municipal obligations, tax exempt |  |  | 136,321 |  |  |  | 6,367 |  |  |  | (12 | ) |  |  | 142,676 |
Municipal obligations, taxable |  |  | 46,643 |  |  |  | 2,892 |  |  |  | - |  |  |  | 49,535 |
Agency mortgage-backed securities |  |  | 75,530 |  |  |  | 3,108 |  |  |  | - |  |  |  | 78,638 |
Certificates of deposit |  |  | 5,460 |  |  |  | - |  |  |  | - |  |  |  | 5,460 |
Total available-for-sale |  | $ | 284,758 |  |  | $ | 12,542 |  |  | $ | (30 | ) |  | $ | 297,270 |
Schedule of Available for Sale Securities Continuous Unrealized Loss Position Fair Value | Schedule of Available for Sale Securities Continuous Unrealized Loss Position Fair Value
|  | As of September 30, 2021 |
(Dollars in thousands) |  | Less than 12 months |  |  | 12 months or longer |  |  | Total |
|  | No. of |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
|  | securities |  |  | value |  |  | losses |  |  | value |  |  | losses |  |  | value |  |  | losses |
U.S. treasury securities |  |  | 15 |  |  | $ | 28,065 |  |  | $ | (94 | ) |  | $ | - |  |  | $ | - |  |  | $ | 28,065 |  |  | $ | (94 | )
U.S. federal agency obligations |  |  | 4 |  |  |  | 7,125 |  |  |  | (7 | ) |  |  | 3,068 |  |  |  | (2 | ) |  |  | 10,193 |  |  |  | (9 | )
Municipal obligations, tax exempt |  |  | 25 |  |  |  | 8,628 |  |  |  | (28 | ) |  |  | 280 |  |  |  | (1 | ) |  |  | 8,908 |  |  |  | (29 | )
Municipal obligations, taxable |  |  | 8 |  |  |  | 4,781 |  |  |  | (58 | ) |  |  | - |  |  |  | - |  |  |  | 4,781 |  |  |  | (58 | )
Agency mortgage-backed securities |  |  | 21 |  |  |  | 72,908 |  |  |  | (436 | ) |  |  | - |  |  |  | - |  |  |  | 72,908 |  |  |  | (436 | )
Total |  |  | 73 |  |  | $ | 121,507 |  |  | $ | (623 | ) |  | $ | 3,348 |  |  | $ | (3 | ) |  | $ | 124,855 |  |  | $ | (626 | )
|  | As of December 31, 2020 |
(Dollars in thousands) |  | Less than 12 months |  |  | 12 months or longer |  |  | Total |
|  | No. of |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
|  | securities |  |  | value |  |  | losses |  |  | value |  |  | losses |  |  | value |  |  | losses |
U.S. federal agency obligations |  |  | 4 |  |  | $ | 11,772 |  |  | $ | (18 | ) |  | $ | - |  |  | $ | - |  |  | $ | 11,772 |  |  | $ | (18 | )
Municipal obligations, tax exempt |  |  | 12 |  |  |  | 4,191 |  |  |  | (12 | ) |  |  | - |  |  |  | - |  |  |  | 4,191 |  |  |  | (12 | )
Total |  |  | 16 |  |  | $ | 15,963 |  |  | $ | (30 | ) |  | $ | - |  |  | $ | - |  |  | $ | 15,963 |  |  | $ | (30 | )
Schedule of Investments Classified by Contractual Maturity Date | The table below sets forth amortized cost and fair value of investment securities at September 30, 2021. The table includes scheduled principal payments and estimated prepayments, based on observable market inputs, for agency mortgage-backed securities. Actual maturities will differ from contractual maturities because borrowers have the right to prepay obligations with or without prepayment penalties. Schedule of Investments Classified by Contractual Maturity Date
(Dollars in thousands) |  | Amortized |  |  | Estimated |
|  | cost |  |  | fair value |
Due in less than one year |  | $ | 29,938 |  |  | $ | 30,020 |
Due after one year but within five years |  |  | 232,658 |  |  |  | 235,528 |
Due after five years but within ten years |  |  | 52,948 |  |  |  | 55,177 |
Due after ten years |  |  | 55,144 |  |  |  | 57,793 |
Total |  | $ | 370,688 |  |  | $ | 378,518 |
Schedule of Realized Gain (loss) | Sales proceeds and gross realized gains and losses on sales of available-for-sale securities were as follows for the periods indicated: Schedule of Realized Gain (loss)
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
(Dollars in thousands) |  | Three months ended September 30, |  |  | Nine months ended September 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Sales proceeds |  | $ | 1,400 |  |  | $ | 16,655 |  |  | $ | 16,623 |  |  | $ | 61,164 |
Realized gains |  | $ | 30 |  |  | $ | 678 |  |  | $ | 1,138 |  |  | $ | 2,450 |
Realized losses |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (2 | )
Net realized gains |  | $ | 30 |  |  | $ | 678 |  |  | $ | 1,138 |  |  | $ | 2,448 |

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- Definition Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27357-111563 + Details
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