Loans (Schedule Of Average Balance And Interest Income Recognized Related To Impaired Loans) (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Impaired Loans, Average Recorded Investment	$ 395,287	$ 378,708	$ 396,465	$ 378,181
Impaired Loans, Interest Income Recognized	1,449	795	2,877	1,604
Commercial Loans [Member]
Impaired Loans, Average Recorded Investment	50,379	37,492	46,204	37,751
Impaired Loans, Interest Income Recognized	263	45	525	104
Real Estate Construction Loans [Member]
Impaired Loans, Average Recorded Investment	84,787	95,540	85,402	98,321
Impaired Loans, Interest Income Recognized	77		153
Commercial Mortgage Loans [Member]
Impaired Loans, Average Recorded Investment	242,697	234,716	247,885	231,675
Impaired Loans, Interest Income Recognized	1,052	739	2,099	1,478
Residential Mortgage And Equity Lines [Member]
Impaired Loans, Average Recorded Investment	17,424	10,960	16,974	10,434
Impaired Loans, Interest Income Recognized	$ 57	$ 11	$ 100	$ 22