Goodwill and Other Intangibles (Schedule of Amortization Annual Expense) (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 979
Finite-Lived Intangible Assets, Amortization Expense, Year Two	943
Finite-Lived Intangible Assets, Amortization Expense, Year Three	914
Finite-Lived Intangible Assets, Amortization Expense, Year Four	890
Finite-Lived Intangible Assets, Amortization Expense, Year Five	860
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	$ 4,554