Allowance for Credit Losses (Schedule Of Troubled Debt Restructuring) (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2020 USD ($) contracts	Dec. 31, 2019 USD ($) contracts
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	$ 15,000	$ 18,600
Financing Receivable, Modifications, Number of Contracts | contracts	83	62
Entity Loan Modification Program [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	$ 27,497	$ 18,576
Entity Loan Modification Program [Member] | Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	15,032	18,576
Entity Loan Modification Program [Member] | Non-Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	$ 12,465	$ 0
Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | contracts	8	3
Commercial real estate | Entity Loan Modification Program [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	$ 5,324	$ 3,968
Commercial real estate | Entity Loan Modification Program [Member] | Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	1,367	3,968
Commercial real estate | Entity Loan Modification Program [Member] | Non-Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	$ 3,957	$ 0
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | contracts	3	2
Commercial | Entity Loan Modification Program [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	$ 11,545	$ 4,105
Commercial | Entity Loan Modification Program [Member] | Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	3,037	4,105
Commercial | Entity Loan Modification Program [Member] | Non-Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	$ 8,508	$ 0
Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | contracts	67	54
Residential | Entity Loan Modification Program [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	$ 10,519	$ 10,460
Residential | Entity Loan Modification Program [Member] | Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	10,519	10,460
Residential | Entity Loan Modification Program [Member] | Non-Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	$ 0	$ 0
Consumer & Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | contracts	5	3
Consumer & Other | Entity Loan Modification Program [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	$ 109	$ 43
Consumer & Other | Entity Loan Modification Program [Member] | Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	109	43
Consumer & Other | Entity Loan Modification Program [Member] | Non-Accrual Status
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total troubled debt restructurings, net of deferred fees and costs	$ 0	$ 0