Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Acquisition Costs, Period Cost	$ 829
Gain Loss On Sales Of Loans Net	294	$ 104
Accumulated Other Comprehensive Income Loss, Reclassification Due To Accounting Standard Update Asu 2018 02	196
U.S. Small Business Administration Loan [Member]
Property, Plant and Equipment [Line Items]
Proceeds from Sale of Loans Held-for-investment	2,800
Gain Loss On Sales Of Loans Net	$ 294
Building and Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	50 years
Building and Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	15 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Automobiles [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Automobiles [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	4 years