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Investment Securities (Tables) | 12 Months Ended
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Dec. 31, 2020
Schedule Of Investments [Abstract] |
Summary of Fixed Maturity Securities Available for Sale | Fixed maturity securities available for sale at December 31, 2020 and 2019 consisted of the following:
December 31, 2020 (Dollars in thousands) |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Mortgage-backed securities, principally obligations of US federal agencies |  | $ | 34,929 |  |  | $ | 1,495 |  |  | $ | (45 | ) |  | $ | 36,379 |
State and municipalities |  |  | 10,226 |  |  |  | 189 |  |  |  | (2 | ) |  |  | 10,413 |
Total |  | $ | 45,155 |  |  | $ | 1,684 |  |  | $ | (47 | ) |  | $ | 46,792 |
December 31, 2019 (Dollars in thousands) |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Mortgage-backed securities, principally obligations of US federal agencies |  | $ | 36,335 |  |  | $ | 411 |  |  | $ | (112 | ) |  | $ | 36,634 |
State and municipalities |  |  | 12,279 |  |  |  | 186 |  |  |  | (101 | ) |  |  | 12,364 |
Total |  | $ | 48,614 |  |  | $ | 597 |  |  | $ | (213 | ) |  | $ | 48,998 |
Summary of Amortized Cost and Estimated Market Value of Investment Securities by Contractual Maturity | The amortized cost and estimated market value of investment securities as of December 31, 2020 by contractual maturity are shown below. Actual maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
(Dollars in thousands) |  | Amortized Cost |  |  | Fair Value |
Due in one year or less |  | $ | 25 |  |  | $ | 25 |
Due after one year through five years |  |  | 12,485 |  |  |  | 12,956 |
Due after five years through ten years |  |  | 14,499 |  |  |  | 15,214 |
Due after ten years |  |  | 18,146 |  |  |  | 18,597 |
Total |  | $ | 45,155 |  |  | $ | 46,792 |
Summary of Securities with Gross Unrealized Losses | The following tables show information pertaining to securities with gross unrealized losses at December 31, 2020 and 2019, aggregated by investment category and length of time that individual securities have been in a continuous loss position follows.
|  | Less than Twelve Months |  |  | Twelve Months and Over |
December 31, 2020 (Dollars in thousands) |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Gross Unrealized Losses |  |  | Fair Value |
Mortgage-backed securities, principally obligations of US federal agencies |  | $ | (45 | ) |  | $ | 4,028 |  |  | $ | — |  |  | $ | — |
State and municipalities |  |  | — |  |  |  | — |  |  |  | (2 | ) |  |  | 196 |
Total |  | $ | (45 | ) |  | $ | 4,028 |  |  | $ | (2 | ) |  | $ | 196 |
|  | Less than Twelve Months |  |  | Twelve Months and Over |
December 31, 2019 (Dollars in thousands) |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Gross Unrealized Losses |  |  | Fair Value |
Mortgage-backed securities, principally obligations of US federal agencies |  | $ | (74 | ) |  | $ | 8,291 |  |  | $ | (38 | ) |  | $ | 4,939 |
State and municipalities |  |  | (17 | ) |  |  | 2,099 |  |  |  | (84 | ) |  |  | 2,739 |
Total |  | $ | (91 | ) |  | $ | 10,390 |  |  | $ | (122 | ) |  | $ | 7,678 |

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