Allowance For Loan Losses (Schedule Of Credit Quality Indicators) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	$ 3,616,099	$ 3,587,608
Commercial Industrial Loans And Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	1,767,752	1,741,256
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	308,015	286,314
Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	1,459,737	1,454,942
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	1,640,396	1,635,338
Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	148,928	153,496
Consumer Loan
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	54,263	51,190
DDA Overdrafts
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	4,760	6,328
Pass | Commercial Industrial Loans And Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	1,685,491	1,653,677
Pass | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	276,847	250,856
Pass | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	1,408,644	1,402,821
Special Mention | Commercial Industrial Loans And Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	16,310	33,582
Special Mention | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	2,472	27,886
Special Mention | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	13,838	5,696
Substandard | Commercial Industrial Loans And Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	65,951	53,997
Substandard | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	28,696	7,572
Substandard | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	37,255	46,425
Doubtful | Commercial Industrial Loans And Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	0	0
Doubtful | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	0	0
Doubtful | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, Total	$ 0	$ 0