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Number of Loans Funded under Paycheck Protection Program.

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

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Includes any additional disclosures related to the credit quality of financing receivables. This may include a description of a credit quality indicator or a description of how the internal risk ratings used by a company relate to the likelihood of loss.

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Number of financing receivables that have been modified by troubled debt restructurings.

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Amount of interest and fee income from loans classified as other.

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Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

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Loans and Related Allowance for Credit Losses (Narrative) (Details)	3 Months Ended		6 Months Ended		12 Months Ended	15 Months Ended
	Jun. 30, 2020 USD ($) loan	Jun. 30, 2019 USD ($) loan	Jun. 30, 2020 USD ($) contract loan item	Jun. 30, 2019 USD ($) loan	Dec. 31, 2019 USD ($) contract	Jun. 30, 2020 USD ($) loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 420,596,000		$ 420,596,000		$ 400,590,000	$ 420,596,000
Troubled debt restructured loan	679,000	$ 324,000	679,000	$ 324,000	$ 703,000	679,000
Reserves relating to TDR	0		$ 0			$ 0
Number of default TDR \| loan		1		1
Restructured loan balance in default status		$ 324,000		$ 324,000
Modified trouble debt, number of contracts			8	1	8	0
Recorded charge-offs	$ 7,000	28,000	$ 28,000	$ 101,000
Credit quality indicators information			This individual analysis includes loans to commercial customers with an aggregate loan exposure greater than $500,000 and for lines of credit in excess of $50,000.
Number of Loans Funded under Paycheck Protection Program \| loan	462		462			462
Amount of loans downgraded from Pass to special mention	$ 10,495,000
Covid-19 [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of delinquent borrowers approved for designated deferrals \| item			0
Paycheck Protection Program [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Net amount of PPP loans	$ 30,751,000		$ 30,751,000			$ 30,751,000
Deferred fees of PPP loans			$ 687,000
Paycheck Protection Program [Member] \| Maturity Dates of Two Years [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of Loans Funded under Paycheck Protection Program \| loan	454		454			454
Paycheck Protection Program [Member] \| Maturity Dates of Five Years [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of Loans Funded under Paycheck Protection Program \| loan	8		8			8
Net amount of PPP loans	$ 74,000		$ 74,000			$ 74,000
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	16,390,000		16,390,000		$ 16,377,000	16,390,000
Recorded charge-offs	0	0	0	15,000
Mortgage Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded charge-offs	4,000	2,000	$ 4,000	49,000
Home Equity Lines of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Maximum loan-to-value ratio			90.00%
Home Equity Installment Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Maximum loan-to-value ratio			80.00%
Real Estate Portfolio Segment [Member] \| Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	123,581,000		$ 123,581,000		126,613,000	123,581,000
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	319,000		$ 319,000		248,000	319,000
Consumer Portfolio Segment [Member] \| Mortgage Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	143,136,000		143,136,000		150,538,000	143,136,000
Accruing Troubled Debt Restructurings [Member] \| Real Estate Portfolio Segment [Member] \| Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Troubled debt restructured loan	302,000	$ 324,000	$ 302,000	$ 324,000	$ 306,000	302,000
Modified trouble debt, number of contracts			1	1	1
Accruing Troubled Debt Restructurings [Member] \| Consumer Portfolio Segment [Member] \| Mortgage Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Troubled debt restructured loan	377,000		$ 377,000		$ 397,000	377,000
Modified trouble debt, number of contracts \| contract			7		7
Payment Deferral [Member] \| Covid-19 [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 90,210,000		$ 90,210,000			$ 90,210,000
Number of borrowers approved for designated deferrals \| loan			242
Number of delinquent borrowers approved for designated deferrals \| item			0