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Income Taxes (Schedule of Components of Income Tax Expense) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]      
Current tax expense $ 3,094 $ 2,346 $ 2,001
Deferred tax expense 135 207 432
Deferred tax adjustment for enacted rate change 397    
Total income tax expense $ 3,626 $ 2,553 $ 2,433