Credit Quality And Allowance For Credit Losses (Financial Effect of Loan Modifications) (Details)	3 Months Ended	6 Months Ended
Jun. 30, 2023	Jun. 30, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	11 months 15 days	1 year 1 month 24 days
Weighted-Average Interest Rate Reduction	(1.92%)	(0.67%)
Business loans:
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	11 months 15 days	1 year 1 month 24 days
Weighted-Average Interest Rate Reduction	(1.92%)	(0.67%)
Business loans: \| Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	6 months 18 days	9 months 6 days
Weighted-Average Interest Rate Reduction	0.00%	(0.44%)
Commercial mortgage: \| Business loans: \| Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	5 years 3 days	2 years 5 months 15 days
Weighted-Average Interest Rate Reduction	(1.92%)	(0.71%)
Commercial mortgage: \| Business loans: \| Commercial \| Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)		6 months
Weighted-Average Interest Rate Reduction		0.00%
Commercial mortgage: \| Business loans: \| Commercial \| Other business lines
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	5 years 3 days	2 years 7 months 27 days
Weighted-Average Interest Rate Reduction	(1.92%)	(0.71%)

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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