Allowance For Loan Losses (Schedule Of Credit Quality Indicators) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	$ 3,127,410	$ 3,046,226
Commercial Industrial Loans And Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	1,486,060	1,415,183
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	208,484	185,667
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	1,277,576	1,229,516
Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	1,468,278	1,451,462
Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	139,499	141,965
Consumer Loan
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	29,162	32,545
DDA Overdrafts
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	4,411	5,071
Pass | Commercial Industrial Loans And Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	1,407,207	1,355,111
Pass | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	175,951	176,823
Pass | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	1,231,256	1,178,288
Special Mention | Commercial Industrial Loans And Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	33,940	18,458
Special Mention | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	25,872	2,427
Special Mention | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	8,068	16,031
Substandard | Commercial Industrial Loans And Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	44,913	41,614
Substandard | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	6,661	6,417
Substandard | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	38,252	35,197
Doubtful | Commercial Industrial Loans And Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	0	0
Doubtful | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	0	0
Doubtful | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans, Total	$ 0	$ 0