Loans and Allowance for Loan Losses (Schedule of Nonperforming Assets, Including Nonaccruing TDRs) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Summary of nonperforming assets
Nonaccruing troubled debt restructurings	$ 2,763	$ 2,541
Total nonaccrual loans, including nonaccruing TDRs	7,028	5,830
Other real estate owned
Total nonperforming assets	$ 7,028	$ 5,830
Nonperforming assets as a percentage of:
Total assets	0.32%	0.31%
Gross loans	0.38%	0.35%
Total loans over 90 days past due	$ 1,033	$ 458
Loans over 90 days past due and still accruing
Accruing troubled debt restructurings	5,791	6,742
Commercial Loan [Member] | Owner Occupied Re [Member]
Summary of nonperforming assets
Nonaccruing
Commercial Loan [Member] | Non Owner Occupied Re [Member]
Summary of nonperforming assets
Nonaccruing	1,963	210
Commercial Loan [Member] | Business Loan [Member]
Summary of nonperforming assets
Nonaccruing	198	81
Commercial Loan [Member] | Construction Loans [Member]
Summary of nonperforming assets
Nonaccruing
Consumer Loan [Member] | Other Consumer [Member]
Summary of nonperforming assets
Nonaccruing		12
Consumer Loan [Member] | Construction Loans [Member]
Summary of nonperforming assets
Nonaccruing
Consumer Loan [Member] | Real Estate Loan [Member]
Summary of nonperforming assets
Nonaccruing	1,637	1,980
Consumer Loan [Member] | Home Equity Loan [Member]
Summary of nonperforming assets
Nonaccruing	$ 467	$ 1,006