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Income Taxes, Reconciliation of Statutory to Effective Tax Rates (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Reconciliation of Statutory to Effective Tax Rates [Abstract]      
Computed “expected” tax expense (benefit) $ 1,445 $ 1,828 $ 1,568
Impact of the Tax Cuts and Jobs Act   1,687  
Changes in income taxes resulting from:      
Tax-exempt interest income (149) (254) (242)
Tax credits (504) (422) (402)
Other (46) 40 13
Provision for income taxes $ 746 $ 2,879 $ 937