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6. Fair Value (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Estimated fair value | $ 201,514 | $ 195,746
Level 1 |  |
Estimated fair value | 0 | 0
Level 2 |  |
Estimated fair value | 201,264 | 195,496
Level 3 |  |
Estimated fair value | 250 | 250
Mortgage-backed securities |  |
Estimated fair value | 84,076 | 78,956
Mortgage-backed securities | Level 1 |  |
Estimated fair value | 0 | 0
Mortgage-backed securities | Level 2 |  |
Estimated fair value | 84,076 | 78,956
Mortgage-backed securities | Level 3 |  |
Estimated fair value | 0 | 0
U.S. Government sponsored enterprises |  |
Estimated fair value | 26,908 | 28,397
U.S. Government sponsored enterprises | Level 1 |  |
Estimated fair value | 0 | 0
U.S. Government sponsored enterprises | Level 2 |  |
Estimated fair value | 26,908 | 28,397
U.S. Government sponsored enterprises | Level 3 |  |
Estimated fair value | 0 | 0
State and political subdivisions |  |
Estimated fair value | 90,280 | 88,143
State and political subdivisions | Level 1 |  |
Estimated fair value | 0 | 0
State and political subdivisions | Level 2 |  |
Estimated fair value | 90,280 | 88,143
State and political subdivisions | Level 3 |  |
Estimated fair value | 0 | 0
Trust preferred securities |  |
Estimated fair value | 250 | 250
Trust preferred securities | Level 1 |  |
Estimated fair value | 0 | 0
Trust preferred securities | Level 2 |  |
Estimated fair value | 0 | 0
Trust preferred securities | Level 3 |  |
Estimated fair value | $ 250 | $ 250

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