Allowance For Loan Losses And Credit Quality Of Financing Receivables (Loans Which The Accrual Of Interest Has Been Discontinued) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 24,243	$ 24,283
Commercial And Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	396	32
Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,529	2,458
Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	17,410	19,311
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 2,908	$ 2,482