Loans and Related Allowance for Credit Losses (Narrative) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Period for loan to be nonaccrual	90 days
Business lines of credit, maturity period	5 years
Period for loans to be considered for charge off	120 days
Home Equity Lines of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Maximum terms offered to loans	20 years
Maximum loan-to-value ratio	90.00%
Fixed Rate and Adjustable Rate Mortgage Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Maximum terms offered to loans	25 years
Home Equity Installment Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Maximum terms offered to loans	15 years
Maximum loan-to-value ratio	95.00%
Real Estate Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Maximum terms offered to loans	20 years
Maximum loan-to-value ratio	80.00%
Real Estate Portfolio Segment [Member] | Mortgage Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Maximum loan-to-value ratio	80.00%
Loan balance in the process of foreclosure	$ 405,000	$ 94,000