Loans (Estimated Aggregate Amortization Expense) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
Amortization Expense, Next Twelve Months	$ 899
Amortization Expense, Year Two	675
Amortization Expense, Year Three	507
Amortization Expense, Year Four	381
Amortization Expense, Year Five	286
Amortization Expense, Thereafter	865
Total estimated amortization expense	$ 3,613	$ 3,493	$ 3,348	$ 2,989