Allowance For Credit Losses (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) contract	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) contract
Financing Receivable, Impaired [Line Items]
Threshold Period for Discontinuance of Interest Accrual			90 days	90 days
Financing Receivable, Nonaccrual, Interest Income	$ 100	$ 100	$ 100	$ 200
Interest income	$ 100	$ 100	$ 100	100
Financing Receivable, Threshold Period Past Due	30 days		30 days		30 days
Increase in provision for credit losses for TDRs			$ 100	100
Charge-offs related to TDRs			$ 100	$ 100	$ 700
Number of TDRs that defaulted | contract			0		1
Financing Receivable, Troubled Debt Restructuring	$ 27,869		$ 27,869		$ 29,630
Allowance for credit losses allocated to troubled debt	1,600		1,600		800
Commitment to lend to troubled debt	0		0
TDRs, subsequent default					$ 3,000
Payment Deferral [Member] | COVID-19 [Member] | Consumer Borrower [Member]
Financing Receivable, Impaired [Line Items]
Loan Restructuring, Trial Modifications, Amount			125,000
Financing Receivable, Troubled Debt Restructuring	$ 3,600		3,600
Payment Deferral [Member] | COVID-19 [Member] | Commercial Borrower [Member]
Financing Receivable, Impaired [Line Items]
Loan Restructuring, Trial Modifications, Amount			$ 430,000
Residential real estate
Financing Receivable, Impaired [Line Items]
Threshold period past due for write-off of financing receivable	120 days		120 days		120 days
Commercial Industrial Loans And Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Threshold period past due for write-off of financing receivable	120 days		120 days		120 days
Consumer
Financing Receivable, Impaired [Line Items]
Threshold period past due for write-off of financing receivable	180 days		180 days		180 days