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Allowance For Credit Losses (Financial Impact Of Modifications To Troubled Borrowers) (Details)	3 Months Ended
	Mar. 31, 2023
Commercial And Industrial [Member] | Extended Maturity
Financing Receivable, Modifications [Line Items]
Financial Effect, Term Extension	Increased weighted-average contractual term by 5 months.
Commercial And Industrial [Member] | Payment Deferral
Financing Receivable, Modifications [Line Items]
Financial Effect, Payments deferral	Payments were deferred for an average of 2 months. In instances where amortization periods were increased, the amortization period was doubled to maturity.
Commercial Real Estate Mortgage - Owner-Occupied [Member] | Extended Maturity
Financing Receivable, Modifications [Line Items]
Financial Effect, Term Extension	Increased weighted-average contractual term by 6 months.
Commercial Real Estate Construction - Owner-Occupied [Member] | Extended Maturity
Financing Receivable, Modifications [Line Items]
Financial Effect, Term Extension	Increased weighted-average contractual term by 5 months.
Residential First Mortgage [Member] | Extended Maturity
Financing Receivable, Modifications [Line Items]
Financial Effect, Term Extension	Increased weighted-average contractual term by approximately 5 years.
Residential First Mortgage [Member] | Combination- Term Extension and Interest Rate Modification
Financing Receivable, Modifications [Line Items]
Financial Effect, Combination- Term Extension and Interest Rate Modification	Reduced weighted-average contractual interest rate by 1%. Increased weighted-average contractual term by approximately 7 years.
Home Equity Lines of Credit[Member] | Extended Maturity
Financing Receivable, Modifications [Line Items]
Financial Effect, Term Extension	Increased weighted-average contractual term by approximately 20 years.
Home Equity Loan [Member] | Extended Maturity
Financing Receivable, Modifications [Line Items]
Financial Effect, Term Extension	Increased weighted-average contractual term by approximately 11 years.
Home Equity Loan [Member] | Combination- Term Extension and Interest Rate Modification
Financing Receivable, Modifications [Line Items]
Financial Effect, Combination- Term Extension and Interest Rate Modification	Reduced weighted-average contractual interest rate by 2%. Increased weighted-average contractual term by approximately 17 years.

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