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Investment Securities (Tables) | 9 Months Ended
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Sep. 30, 2020
Investment Securities [Abstract] |
Summary of Amortized Cost of Investment Securities Classified as Available-for-sale and their Approximate Fair Values |
| Amortized |  | Gross |  | Gross |  |
| Cost |  | Unrealized |  | Unrealized |  | Fair
(In thousands) | Basis |  | Gains |  | Losses |  | Value
September 30, 2020 |  |  |  |  |  |  |  |  |  |  |
State and municipal securities | $ | 10,225 |  | $ | 605 |  | $ | — |  | $ | 10,830
Asset-backed securities |  | 4,704 |  |  | 321 |  |  | — |  |  | 5,025
Government mortgage-backed securities |  | 18,086 |  |  | 491 |  |  | 11 |  |  | 18,566
Total debt securities available-for-sale | $ | 33,015 |  | $ | 1,417 |  | $ | 11 |  | $ | 34,421
December 31, 2019 |  |  |  |  |  |  |  |  |  |  |
State and municipal securities | $ | 10,808 |  | $ | 398 |  | $ | — |  | $ | 11,206
Asset-backed securities |  | 5,433 |  |  | 71 |  |  | 4 |  |  | 5,500
Government mortgage-backed securities |  | 24,954 |  |  | 197 |  |  | 67 |  |  | 25,084
Total debt securities available-for-sale | $ | 41,195 |  | $ | 666 |  | $ | 71 |  | $ | 41,790
Schedule of Maturities of Debt Securities |
| Available-for-Sale
| Amortized |  | Fair
(In thousands) | Cost |  | Value
Due after one year through five years | $ | 921 |  | $ | 947
Due after five years through ten years |  | 912 |  |  | 918
Due after ten years |  | 8,392 |  |  | 8,965
Government mortgage-backed securities |  | 18,086 |  |  | 18,566
Asset-backed securities |  | 4,704 |  |  | 5,025
| $ | 33,015 |  | $ | 34,421
Schedule of Aggregate Fair Value and Unrealized Losses of Securities |
| Less than 12 Months |  | 12 Months or Longer |  | Total
| Fair |  | Unrealized |  | Fair |  | Unrealized |  | Fair |  | Unrealized
(In thousands) | Value |  | Losses |  | Value |  | Losses |  | Value |  | Losses
September 30, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporarily impaired securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Government mortgage-backed securities | $ | — |  | $ | — |  | $ | 867 |  | $ | 11 |  | $ | 867 |  | $ | 11
Total temporarily impaired debt securities | $ | — |  | $ | — |  | $ | 867 |  | $ | 11 |  | $ | 867 |  | $ | 11
December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporarily impaired securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset-backed securities | $ | 606 |  | $ | 4 |  | $ | — |  | $ | — |  | $ | 606 |  | $ | 4
Government mortgage-backed securities |  | 5,207 |  |  | 8 |  |  | 5,418 |  |  | 59 |  |  | 10,625 |  |  | 67
Total temporarily impaired debt securities | $ | 5,813 |  | $ | 12 |  | $ | 5,418 |  | $ | 59 |  | $ | 11,231 |  | $ | 71

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