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Securities - Available for sale Securities (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 208,925 $ 216,650
Gross Unrealized Gains 1,284 926
Gross Unrealized Losses (1,202) (2,666)
Fair Value 209,007 214,910 [1]
U.S. government agencies and corporations    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 17,650 18,008
Gross Unrealized Gains   1
Gross Unrealized Losses (256) (536)
Fair Value 17,394 17,473
Mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 101,159 106,787
Gross Unrealized Gains 279 85
Gross Unrealized Losses (848) (1,889)
Fair Value 100,590 104,983
Obligations of states and political subdivisions    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 90,116 91,855
Gross Unrealized Gains 1,005 840
Gross Unrealized Losses (98) (241)
Fair Value $ 91,023 $ 92,454
[1] Derived from audited consolidated financial statements.