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Securities - Available for sale Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 188,876 $ 216,650
Gross Unrealized Gains 2,145 926
Gross Unrealized Losses (152) (2,666)
Fair Value 190,869 214,910 [1]
U.S. government agencies and corporations    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 22,204 18,008
Gross Unrealized Gains 2 1
Gross Unrealized Losses (26) (536)
Fair Value 22,180 17,473
Mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 88,933 106,787
Gross Unrealized Gains 879 85
Gross Unrealized Losses (111) (1,889)
Fair Value 89,701 104,983
Obligations of states and political subdivisions    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 77,739 91,855
Gross Unrealized Gains 1,264 840
Gross Unrealized Losses (15) (241)
Fair Value $ 78,988 $ 92,454
[1] Derived from audited consolidated financial statements.