Allowance For Credit Losses (Narrative) (Details)	6 Months Ended
	Jun. 30, 2021 USD ($) contract	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Financing Receivable, Impaired [Line Items]
Threshold Period for Discontinuance of Interest Accrual	90 days
Financing Receivable, Nonaccrual, Interest Income	$ 100,000	$ 100,000
Impaired Financing Receivable, Interest Income, Interest Forgone	$ 200,000	100,000
Financing Receivable, Threshold Period Past Due	30 days
Allowance for credit losses allocated to troubled debt	$ 300,000		$ 1,600,000
Commitment to lend to troubled debt	0
Increase in provision for credit losses for TDRs	100,000	100,000
Charge-offs related to TDRs	$ 0	$ 0
Number of TDRs that defaulted | contract	1,700,000
Financing Receivable, Troubled Debt Restructuring	$ 22,987,000		$ 26,142,000
Payment Deferral | COVID-19 | Consumer Borrower
Financing Receivable, Impaired [Line Items]
Loan Restructuring, Trial Modifications, Amount	144,000,000
Loan Restructuring, Trial Modifications, Period End Amount	2,000,000
Loan Restructuring, Trial Modifications, Resumed Payment, Amount	142,000,000
Financing Receivable, Troubled Debt Restructuring	4,000,000
Payment Deferral | COVID-19 | Commercial Borrower
Financing Receivable, Impaired [Line Items]
Loan Restructuring, Trial Modifications, Amount	479,000,000
Loan Restructuring, Trial Modifications, Resumed Payment, Amount	387,000,000
Payment Deferral | COVID-19 | Hotels
Financing Receivable, Impaired [Line Items]
Loan Restructuring, Trial Modifications, Period End Amount	$ 92,000,000
Residential real estate
Financing Receivable, Impaired [Line Items]
Threshold period past due for write-off of financing receivable	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
Consumer
Financing Receivable, Impaired [Line Items]
Threshold period past due for write-off of financing receivable	180 days