Allowance For Loan Losses (Schedule Of Aging Analysis Of Accruing And Non-Accruing Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	$ 8,887	$ 11,396
Current	3,601,000	3,593,213
Non-accrual	12,232	11,490
Commercial Loan [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	1,240	458
Current	370,981	306,375
Non-accrual	768	1,182
Commercial Real Estate 1-4 Family
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	484
Current	107,272
Non-accrual	2,056
Commercial Real Estate Hotels
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0
Current	291,513
Non-accrual	2,951
Commercial Real Estate Multi-Family
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0
Current	215,671
Non-accrual	0
Commercial Real Estate Non Residential Non-Owner Occupied
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	119
Current	640,724
Non-accrual	508
Commercial Real Estate Non Residential Owner Occupied
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	22
Current	210,576
Non-accrual	2,886
Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	625	1,580
Current	1,465,756	1,451,773
Non-accrual	8,401	6,384
Residential Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	5,993	7,484
Current	1,578,733	1,629,519
Non-accrual	2,968	3,393
Home Equity Loan
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	575	956
Current	135,799	147,441
Non-accrual	95	531
Consumer Loan
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	113	188
Current	47,575	54,075
Non-accrual	0	0
DDA Overdrafts
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	341	730
Current	2,156	4,030
Non-accrual	0	0
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	7,987	9,155
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Loan [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	1,213	243
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate 1-4 Family
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	484
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Hotels
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Multi-Family
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Non Residential Non-Owner Occupied
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	119
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Non Residential Owner Occupied
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	22
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	625	1,514
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	5,177	5,758
Financial Asset, 30 to 59 Days Past Due [Member] | Home Equity Loan
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	575	840
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Loan
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	63	156
Financial Asset, 30 to 59 Days Past Due [Member] | DDA Overdrafts
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	334	644
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	900	1,974
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Loan [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	27	31
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate 1-4 Family
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Hotels
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Multi-Family
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Non Residential Non-Owner Occupied
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Non Residential Owner Occupied
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0	66
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	816	1,643
Financial Asset, 60 to 89 Days Past Due [Member] | Home Equity Loan
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0	116
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Loan
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	50	32
Financial Asset, 60 to 89 Days Past Due [Member] | DDA Overdrafts
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	7	86
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0	267
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Loan [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0	184
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate 1-4 Family
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Hotels
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Multi-Family
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Non Residential Non-Owner Occupied
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Non Residential Owner Occupied
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0	83
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Home Equity Loan
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Loan
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | DDA Overdrafts
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	$ 0	$ 0