Allowance for Credit Losses (Schedule Of Troubled Debt Restructuring) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) contracts	Dec. 31, 2019 USD ($) contracts
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modifications recorded investments	$ 15,000	$ 18,600
Entity Loan Modification Program [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modifications recorded investments	$ 15,280	$ 18,576
Financing Receivable, Modifications, Number of Contracts | contracts	83	62
Entity Loan Modification Program [Member] | Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modifications recorded investments	$ 14,991	$ 18,576
Entity Loan Modification Program [Member] | Non-Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modifications recorded investments	289	0
Commercial Real Estate | Entity Loan Modification Program [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modifications recorded investments	$ 1,634	$ 3,968
Financing Receivable, Modifications, Number of Contracts | contracts	7	3
Commercial Real Estate | Entity Loan Modification Program [Member] | Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modifications recorded investments	$ 1,345	$ 3,968
Commercial Real Estate | Entity Loan Modification Program [Member] | Non-Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modifications recorded investments	289	0
Commercial | Entity Loan Modification Program [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modifications recorded investments	$ 1,231	$ 4,105
Financing Receivable, Modifications, Number of Contracts | contracts	1	2
Commercial | Entity Loan Modification Program [Member] | Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modifications recorded investments	$ 1,231	$ 4,105
Commercial | Entity Loan Modification Program [Member] | Non-Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modifications recorded investments	0	0
Residential | Entity Loan Modification Program [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modifications recorded investments	$ 12,415	$ 10,460
Financing Receivable, Modifications, Number of Contracts | contracts	75	54
Residential | Entity Loan Modification Program [Member] | Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modifications recorded investments	$ 12,415	$ 10,460
Residential | Entity Loan Modification Program [Member] | Non-Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modifications recorded investments	$ 0	0
Consumer & Other, Net | Entity Loan Modification Program [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modifications recorded investments		$ 43
Financing Receivable, Modifications, Number of Contracts | contracts		3
Consumer & Other, Net | Entity Loan Modification Program [Member] | Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modifications recorded investments		$ 43
Consumer & Other, Net | Entity Loan Modification Program [Member] | Non-Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modifications recorded investments		$ 0