Loans and Related Allowance for Credit Losses (Nonaccrual Loans by Classes of the Loan Portfolio) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Financing receivable, recorded investment, nonaccrual status	$ 1,819	$ 1,707
Commercial Loan [Member] | Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing receivable, recorded investment, nonaccrual status	903	908
Construction Loan [Member] | Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing receivable, recorded investment, nonaccrual status		29
Mortgage Loan [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing receivable, recorded investment, nonaccrual status	902	753
Personal Loan [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing receivable, recorded investment, nonaccrual status	$ 14	$ 17