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2. Investment Securities (Details 3) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Estimated fair value $ 195,746 $ 194,578
Mortgage-backed securities    
Estimated fair value 78,956 52,103
Level 1 valuation 0 0
Level 2 valuation 78,956 52,103
Level 3 valuation 0 0
U.S. Government sponsored enterprises    
Estimated fair value 28,397 34,634
Level 1 valuation 0 0
Level 2 valuation 28,397 34,634
Level 3 valuation 0 0
State and political subdivisions    
Estimated fair value 88,143 107,591
Level 1 valuation 0 0
Level 2 valuation 88,143 107,591
Level 3 valuation 0 0
Trust preferred securities    
Estimated fair value 250 250
Level 1 valuation 0 0
Level 2 valuation 250 0
Level 3 valuation $ 0 $ 250