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2. Investment Securities (Details 3) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Estimated fair value | $ 245,249 | $ 195,746
Mortgage-backed securities |  |
Estimated fair value | 145,314 | 78,956
Level 1 valuation | 0 | 0
Level 2 valuation | 145,314 | 78,956
Level 3 valuation | 0 | 0
U.S. Government sponsored enterprises |  |
Estimated fair value | 7,507 | 28,397
Level 1 valuation | 0 | 0
Level 2 valuation | 7,507 | 28,397
Level 3 valuation | 0 | 0
State and political subdivisions |  |
Estimated fair value | 92,428 | 88,143
Level 1 valuation | 0 | 0
Level 2 valuation | 92,248 | 88,143
Level 3 valuation | 0 | 0
Trust preferred securities |  |
Estimated fair value | 0 | 250
Level 1 valuation | 0 | 0
Level 2 valuation | 0 | 250
Level 3 valuation | $ 0 | $ 0

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