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Investment Securities and Other Investments (Tables) | 12 Months Ended
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Dec. 31, 2020
Schedule Of Investments [Abstract] |
Summary of Amortized Cost and Fair Values of Investment Securities | Investment securities available for sale are carried in the consolidated balance sheets at their fair value and investment securities held to maturity are carried in the consolidated balance sheets at their amortized cost. The amortized cost and fair values of investment securities at December 31, 2020 and December 31, 2019 were as follows:
|  | December 31, 2020 |
(Dollars in thousands) |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
State and municipal |  | $ | 14,069 |  |  | $ | 258 |  |  | $ | 68 |  |  | $ | 14,259 |
U.S. Treasury and agencies |  |  | 2,500 |  |  |  | — |  |  |  | 91 |  |  |  | 2,409 |
Mortgage backed securities |  |  | 72,337 |  |  |  | 696 |  |  |  | 398 |  |  |  | 72,635 |
Corporate bonds |  |  | 19,755 |  |  |  | 469 |  |  |  | 52 |  |  |  | 20,172 |
Total investment securities |  | $ | 108,661 |  |  | $ | 1,423 |  |  | $ | 609 |  |  | $ | 109,475 |
|  | December 31, 2019 |
(Dollars in thousands) |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury and agencies |  | $ | 2,500 |  |  | $ | — |  |  | $ | 51 |  |  | $ | 2,449 |
Mortgage backed securities |  |  | 94,983 |  |  |  | 654 |  |  |  | 152 |  |  |  | 95,485 |
Corporate bonds |  |  | 10,554 |  |  |  | 87 |  |  |  | 4 |  |  |  | 10,637 |
|  | $ | 108,037 |  |  | $ | 741 |  |  | $ | 207 |  |  | $ | 108,571 |
Held to maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
State and municipal |  | $ | 12,192 |  |  | $ | 464 |  |  | $ | 2 |  |  | $ | 12,654 |
Total investment securities |  | $ | 120,229 |  |  | $ | 1,205 |  |  | $ | 209 |  |  | $ | 121,225 |
Summary of Fair Value and Gross Unrealized Losses of Securities in Continuous Unrealized Loss Position | The following table shows fair value and gross unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2020 and 2019. The reference point for determining when securities are in an unrealized loss position is period-end; therefore, it is possible that a security's market value exceeded its amortized cost on other days during the past twelve-month period.
|  | December 31, 2020 |
|  | Less than 12 Months |  |  | 12 Months or Greater |  |  | Total |
(Dollars in thousands) |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
State and municipal |  | $ | 3,111 |  |  | $ | (68 | ) |  | $ | — |  |  | $ | — |  |  | $ | 3,111 |  |  | $ | (68 | )
U.S. Treasury and agencies |  |  | 2,410 |  |  |  | (91 | ) |  |  | — |  |  |  | — |  |  |  | 2,410 |  |  |  | (91 | )
Mortgage backed securities |  |  | 20,545 |  |  |  | (65 | ) |  |  | 8,592 |  |  |  | (333 | ) |  |  | 29,137 |  |  |  | (398 | )
Corporate bonds |  |  | 3,242 |  |  |  | (7 | ) |  |  | 1,955 |  |  |  | (45 | ) |  |  | 5,197 |  |  |  | (52 | )
Total |  | $ | 29,308 |  |  | $ | (231 | ) |  | $ | 10,547 |  |  | $ | (378 | ) |  | $ | 39,855 |  |  | $ | (609 | )
|  | December 31, 2019 |
|  | Less than 12 Months |  |  | 12 Months or Greater |  |  | Total |
(Dollars in thousands) |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
State and municipal |  | $ | 333 |  |  | $ | (2 | ) |  | $ | — |  |  | $ | — |  |  | $ | 333 |  |  | $ | (2 | )
U.S. Treasury and agencies |  |  | — |  |  |  | — |  |  |  | 1,949 |  |  |  | (51 | ) |  |  | 1,949 |  |  |  | (51 | )
Mortgage backed securities |  |  | 27,901 |  |  |  | (82 | ) |  |  | 5,348 |  |  |  | (70 | ) |  |  | 33,249 |  |  |  | (152 | )
Corporate bonds |  |  | — |  |  |  | — |  |  |  | 896 |  |  |  | (4 | ) |  |  | 896 |  |  |  | (4 | )
Total |  | $ | 28,234 |  |  | $ | (84 | ) |  | $ | 8,193 |  |  | $ | (125 | ) |  | $ | 36,427 |  |  | $ | (209 | )
Summary of Investments Classified by Contractual Maturity Date | The amortized cost and fair value of securities at December 31, 2020, by contractual maturity are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
|  | December 31, 2020 |
|  | Securities Available for Sale |
(Dollars in thousands) |  | Amortized Cost |  |  | Fair Value |
Due in one year or less |  | $ | 3,427 |  |  | $ | 930 |
Due after one year through five years |  |  | 6,305 |  |  |  | 6,963 |
Due after five years through ten years |  |  | 32,003 |  |  |  | 34,057 |
Due after ten years |  |  | 66,926 |  |  |  | 67,525 |
Total |  | $ | 108,661 |  |  | $ | 109,475 |

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